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Text File | 1996-09-03 | 94.6 KB | 2,053 lines

This file is a historical record of changes to POV-Ray 3.0 as we develop it. 3.00e 09/03/96 Andreas Dilger Fixed problems with file input from stdin and file output to stdout. Fixed problem with PNG image maps. frame.h: Organized and added comments describing most constants. Removed unused constant ANSIFUNC (not used in base POV code). Since the changes are widespread, the whole file is included. Added new constants for calculations with M_PI (M_PI_2, M_PI_180, etc). Changed MAError prototype to use size_t instead of long to quiet warnings. UNIX: Fixed up prototypes and variable types to remove many compiler warnings. Fixed problem with interrupt handler when writing to a broken pipe. Fixed problem with dithering code for mosaic preview. 3.00d 08/13/96 Dieter Bayer Fixed another heightfield bug and other minor heighfield changes. 3.00c 08/07/96 Chris Young Fixed problem with some dda errors in height fields Fixed mem.c problems. ANSI C says you can't do math on void * Fixed octree problem with NULL ptr (perhaps twice. Two users submitted fix) Fixed line number bug. Comments with // got double counted. MS-Dos Djgpp pow function work-around. 3.00b 07/24/96 Andreas Dilger Fixed bug in 3.00a patch that did (void *) arithmetic for pov_memmove. Changed vbuffer.c to draw bounding boxes in white if palette is grayscale. Removed unused typedef from gifdecod.c which conflited with Linux SVGA. Linux SVGA: Added grayscale palette for preview, fixed video mode selection. 3.00a 07/19/96 Andreas Dilger Fixed bug with new radiosity flags and saving empty radiosity _ot_tree. Fixed MEM_HEADER when only MEM_TRACE was defined in mem.c. Fixed mem_header to align on 8 byte boundaries for those machines that need it. Changed pov_realloc to free the memory when size = 0, and return NULL. Changed pov_memcpy() to pov_memmove() and made it work properly, and made all instances of memmove to a new POV_MEMMOVE macro. XWINDOWS: Changed colormap handling to dynamically allocate colors. 3.00 07/07/96 Chris Young Fixed another problem with camera "angle". Scenes will look different from both beta.7f and original beta. Fixed (partially) radiosity resumed traces so scene.rca isn't deleted when there is a controled user abort. Changed version to 3.00 Note two zeros. Future patches will be 3.00a, 3.00b etc. and future public bugfix releases will be 3.01, 3.02 etc. Included spearate patch for DISTRIBUTION_MESSAGE for official compiles only. POVMSS.ZIP contains updated USER_xxx.DOC & CMPL_xxx.DOC files. 3.0.beta.7k 07/03/96 Chris Young Fixed warning for camera inside object Added changes to tokenize.c for Windows from Chris Cason 3.0.beta.7j 07/02/96 Chris Young Fixed polygon normal bug Added trap for negative sqrt Added trap for illegal mix of patterned and layered texture Changed distribution message text MSDOS: Removed beta expiration date. Added MS-Dos credits. 3.0.beta.7i 06/27/96 Andreas Dilger Change 3d jitter code to remove redundant calculation via lookup table (replaces crc lookup table). Remove the +Q10 and +Q11 options and replace them with +QR and a warning msg. Update png_pov.c to use new libpng API. Change compression setting for PNG to default from maximum since there was little benefit and a considerable slowdown at the maximum compression. Fix bad memory free in TTF. UNIX: Fix up interrupt handling. Remove useless calcs in dithering code. Defer X dither-cube setup to reduce startup time and unnecessary calcs. 3.0.beta.7h 06/26/96 Chris Young Fixed qsort macro in super.c Fixed error line number reporting in #while loop (again) MSDOS: Added changes for DJGPP v-2.0 including new pmode.a and ztimer.a. Requires old ld.exe linker and old go32.exe to compile & link. 3.0.beta.7g 06/21/96 Chris Young Fixed problem with // comments ending in \r but not \n MSDOS: Fixed 24-bit truecolor and VESA mode selection. 3.0.beta.7f 06/21/96 Dieter Bayer Fixed bug in camera's angle keyword (the length of the direction vector was not calculated correctly. BEWARE!, old images using angle will look different) Fixed prism bug when the first height was larger than the second height Improved perpendicular camera vectors warning message 3.0.beta.7e 06/16/96 Chris Young Added COOPERATE_0 calls for Mac version Fixed parsing dots count. MSDOS: Fixed DJGPP 1.x VGA support. Minor change in Diamond 24X truecolor. 3.0.beta.7d 06/13/96 Chris Young MSDOS ONLY Major rewrite of video code that is a combination of our old non-VESA code and new VESA 2.0 code submitted by Kendall. Both watcom and borland compiles and works for most modes. However DJGPP is totally messed up. I plan to trash DJGPP and start over for DJGPP 2.0 rather than fix it for 1.14. 3.0.beta.7c 06/13/96 Chris Young Note: Ignore previous 7c patch from Eduard. Instead unzip the enclosed zlib102.zip into source\zlib directory. Then apply this patch which makes a minor change in zlib. 3.0.beta.7b 05/27/96 Dieter Bayer Improved sor error messages Fixed bug with multiple halos using already declared halos Fixed bug in Rotate_Plane() (it's sufficient to rotate the normal in case there's no transformation; speeds things up) Fixed bug that occured when a CSG object had no texture 3.0.beta.7a 05/10/96 Chris Young Fixed image_map crash in POV3DEMO\SURFACE\WARP1.POV 3.0.beta.7 05/02/96 Chris Young Added QSORT macro to frame.h, bbox.c & bsphere.c Updated version to beta.7. 3.0.beta.6j 05/02/96 Dieter Bayer Added several fixes by Chris Young Changed dda_traversal() errors to debug messages Fixed blob lighting bug (increased surface threshold to avoid surface acne due to surface points lying in shadow thought they actually are not) Fixed bugs in blob and mesh opacity tests Fixed bug in plane normal calculation Fixed problems in Copy_Ray_Containers (all entries were copied instead of copying only the valid entries). Fixed bug in Parse_Polygon() (we parse 3d points not 2d points, thus we have to test 3d points when looking for closed polygons) Fixed bug in lighting code (distance based attenuation didn't work anymore) Fixed bug in Copy_Blend_Map() (New->Users must not be increased if it is negative because a negative value is used to indicate that the map is a default map that lies in the data segment and not on the heap. Several successive copies of the map would lead to a positive Users value and Destroy_Blend_Map() would try to free memory in the data segment. That's not possible of course!) 3.0.beta.6i 04/30/96 Andreas Dilger Fix problem with TTF accent centering. Fix problems with PNG flushing and added some more error checking. Fix zlib corruption thanks to zlib authors. Add source file location of smallest/largest alloc for MEM_STATS = 2. Remove test for arcsin as requested by Tim Wegner. Make X-Windows display code work properly during animations. Add MEM_STATS to UNIX config.h. 3.0.beta.6h 04/21/96 Dieter Bayer and Chris Young Changed transformation functions (added trans parameter to pass precalculated transform to speed up parsing) Fixed image map memory leaks (patch by Chris Young) Fixed bug in MEM.C (as reported by Eduard Schwan) Fixed bug that occured with polygons starting with co-linear points Fixed plane shearing bug Fixed cylindrical blob crack bug Fixed texture=NULL bug in initialize_ray_container_state() (in RENDER.C) Fixed lathe bug (too many intersections) Fixed height field dda_traversal() bug Fixed halo dust coloring bug (colors were ignored; see updated docs) Fixed ground fog bug (the density formula was wrong) Fixed bug in intersect_spotlight() in ATMOSPH.C 3.0.beta.6g 04/15/96 Chris Young Fixed negative log problem. Prohibit slope_map when used in a pattern that can't use it. Fixed MEM.C problem from 6e that broke MEM_TRACE Includes Andreas' warn changes to make them official Added FRAME.H macro NEW_LINE_STRING so Write_INI_File can output cr/lf vs just lf. Updated MS-Dos config.h to use MEM_STATS 1 and NEW_LINE_STRING 3.0.beta.6f 04/16/96 Andreas Dilger Fix turbulence in fog distance attenuation calculation. Change rand() to use full precision, instead of 16 bits. Fix declaration of POV_DISPLAY_PLOT_BOX to match actual usage Fix #ifdef in mem.c for MEM_LOG_FNAME Allow escaping the comment ';' character in INI file settings Fix zero scaling check for matrix (again) - check columns instead of rows. Fix problem with Grayscale + Alpha PNG output Add missing destructors to close_all() for random, radiosity, fractal, histogram Fix Locate_file to not add FILENAME_SEPARATOR after DRIVE_SEPARATOR Force histogram grid size to divide into image size evenly Make a destructor for histograms Change hash table size to be a prime number. Removed #ifdefs from prototypes in truetype.c Cache some tables in truetype.c to speed parsing UNIX: Fix up man page SVGA: Add border and center SVGA display, allow non-power-of-two scaling, add DISPLAY_PLOT_BOX function UNIX: Make interrupt handler only set Stop_Flag, instead of actually quitting XWIN: Don't force window to be centered, add DISPLAY_PLOT_BOX function, fix DirectColor, fix PseudoColor palette selection 3.0.beta.6e 04/10/96 Eduard Schwan Moved COOPERATE calls to more evenly called places in the bounding box and vista draw areas. Added code to MEM.C and OPTOUT.C to track and display memory usage statistics. Turn this on by adding a #define MEM_STATS 1 to config.h. To get even more stats printed, use #define MEM_STATS 2" I would suggest we ship with level "1" since that's all people will really care about. Made the Contributing_Authors and Primary_Developers string arrays extern so the GUIs can display the names in their own credits boxes if needed. Filled in the MEM.H header with MEM prototypes, removing from povproto.h, to be more in line with C style. Added more header and code commenting in MEM.C. There was a bug in Radiosity for the GUI implementations, where the global variables were not being reset each time main() was called. If you set radiosity ON, rendered a scene and prematurely interrupted it, then set radiosity OFF & rendered a scene, it would crash at the end of the render when trying to clean up the non-NULL ot_root variable, which now points to freed memory. So at the start of main, a new function Init_Rad_Globals() is called which resets all globals. MAJOR NOTE!!! If you put global variables in POV-Ray, DO NOT initialize them on the declaration line! Create an initializer function and call it from main(). That way, the GUI implementations will work correctly. You can no longer assume that globals will be set to their initial values every time main() is called. 3.0.beta.6d 04/07/96 Dieter Bayer Added hash table look-ups for Find_Reserved() and Find_Symbol() in tokenize.c Fixed atmosphere and halo dust color bug (now a color can be specified for the atmosphere and halo dust that is used to filter light coming from light sources; see docs for more detail) Fixed height field bugs (fixed holes that sometimes appeared; fixed gap between adjactent height fields; fixed surface acne that sometimes appeared) 3.0.beta.6c 03/29/96 Dieter Bayer Added fog to "camera is inside non-hollow object" warning Added code to automically adjust the right and up vectors if the orthographic camera is used (if orthographic is used after all other camera parameters you'll get the same image area as with the perspective camera; see docs) Fixed severe bug in Determine_Apparent_Colour() (weight and texture lists were not saved) Fixed bug in halo parsing (the color map was adjusted twice for declared halos) Fixed bug in halo code (appereance is now independent of any transformations applied to the container object) Fixed bug in bbox recomputing functions (added check for NULL pointer) Fixed bug in Inside_Prism() Fixed bug in blob code (individual component textures were not transformed properly, i.e. they were not transformed with the object) Fixed bug in height field code (in dda_traversal()) Fixed bug in random stream allocation Fixed bug in fog code (fog acne and floating point exceptions) 3.0.beta.6b 03/19/96 Chris Young and Andreas Dilger Fixed substr bug. Now will accept last character in string. Various cosmetic fixes from Andreas Added Andreas' revised matrix fix Fixed USHORT parameter problem in truetype.c Fixed DISTANCE_MAXIMUM parsing so zero is permitted See UNIXMSS6.ZIP for whole new Unix stuff. No patches. 3.0.beta.6a 03/17/96 Dieter Bayer, Steve Demlow and Tim Wegener Added warning when camera is inside any non-hollow object. Fixed bug in Parse_Prism() (Assign_UV_Vec was not used in one place) Changed file buffer size display (the file buffer size will be displayed only if the file buffer is actually used) Fixed the fractal object bounding box problem. Fixed matrix bug (a value of 0 was changed to 1) 3.0.beta.6 03/15/96 Chris Young Minor cosmetic changes only in ms-dos specific areas 3.0.beta.5l 03/14/96 Dieter Bayer Fixed bug in sky_sphere transformartion (used inverse transformation) Fixed bug with image maps and once option (light amplification) and overlayed image maps (dark areas) 3.0.beta.5k 03/13/96 Chris Young Fixed handedness bug that caused Moray problem. Put MAX_INCLUDE_FILES back from 25 to 10 (my mistake) Changed MAX_LIBRARIES from 10 to 25 as I intended MSDOS:Updates for CauseWay fast kbhit(). Note:Create SOURCE\MSDOS\WATCOM\CAUSEWAY and copy KBHITR.OBJ there. 3.0.beta.5j 03/13/96 Dieter Bayer Fixed a bug in do_light_ray_atmosphere() (atmospheric attenuation wasn't correctly handled when the viewpoint was inside a hollow object) 3.0.beta.5i 03/10/96 Dieter Bayer Fixed another small halo bug (at last the halo's appearance is independant from the sampling rate; I hope) 3.0.beta.5h 03/10/96 Dieter Bayer Added atmosphere keyword to light source statement. By default light sources do interact with the atmosphere. If "atmosphere off" is used with a light source it is ignored by the atmosphere. Fixed minor bug in Do_Halo() 3.0.beta.5g 03/04/96 Chris Young Changed get_byte() to gif_get_byte() Changed some parse error reporting procedures. Close all input files before Terminate_POV. Complete all error stream activity before fatal shellout. MSDOS:Updated expiration date to 01/May/1996 MSDOS:Updated makefiles for CauseWay DOS Extender Do "wmake -f msdoswat.mak CW=1" for CauseWay. 3.0.beta.5f 03/04/96 Dieter Bayer Added missing transformations to fog (affecting the up direction only). Changed status screen slightly (aa-options are only shown if aa is used etc.). Fixed bug that occured when -f +c was specified. Fixed bug with negative atmosphere distance. Fixed bug with polygons/prisms and multiple holes. Now any number of closed polygons/prisms can be used in a polygon/prism statement. You get a hole where an even number of polygons/prisms overlaps (Note the new syntax described in the docs). Fixed bug in halo code (halo appearance was dependent from number of samples). Fixed bug in halo code (light passing through the halo was not attenuated by the halo). Fixed bug in halo code (attenuation of background light was hardly every more than 75%) Fixed bug in render/lighting code (a halo was not rendered correctly when the camera was inside the halo container). Fixed bug in camera vector calculations made when look_at was used. Fixed bug in camera parsing (POV-Ray now stops with a fatal error if the camera location and look_at point are equal). Fixed bug in RENDER.C (precomputed camera constants were not recalculated during different frames). Fixed bug in blob/lighting code (the textures/weights list was not correctly re-allocated). Fixed bug with multiple, translucent image maps and once option. 3.0.beta.5e 03/04/96 Chris Young & Andreas Dilger Fixed problem with redeclaring previously declared identifiers Added new #ifndef directive Fixed problem with default maps on brick, hexagon & checker Fixed radiosity and histogram memory leaks Fixed radiosity preview bug Fixed line number in #while loop Fixed #switch, #case, #range bug Added multi-component glyph support to ttf MSDOS Fixed mosaic problem when using too high res for video. 3.0.beta.5d 02/27/96 Dieter Bayer Added random number to parser (keywords "seed" and "rand") Added transformations to sky_sphere Fixed bug in Parse_Blob() that caused a filtering object-level texture not to work correctly (an element-level texture did work though) Fixed bug with scaled spotlights (direction vector has to be normalized in Transform_Light_Source() in POINT.C) Fixed missing eccentricity keyword bug (used in halos) Fixed bug with ground fog (a negative offset moved the fog upwards while a positive moved it downwards) Fixed bug with subsets of cyclic animations (wrong clock values were calculated) Fixed bug in intersect_lathe() that caused a crash sometimes Changed ground fog to behave like "real" ground fog, i.e. the fog has a constant density for all heights below fog_offset Changed behaviour of hollow statement in CSG objects 3.0.beta.5c 02/23/96 Chris Young Fixed problem with animation output file numbering. Added %p output path string to shellouts. NOTE: Macro FILENAME_SEPARATOR is now a char, not a string. Check your config.h for this. Other path related changes. 3.0.beta.5b 02/21/96 Chris Young and Andreas Dilger Fixed ttf problem with unsupported kerning type 128. Fixed smoothed mosaic for lines > 1280 Changed default extension handling per forum discussions. Fixed problem with default extension on output file. Changed radiosity TEMP_FILE_BASE to opts.Scene_Name. Allow "Option#value" in INI-style options as alternative to "Option=value". Added APPEND_FILE_STRING macro. Permit commas in brick, checker and hexagon between pigments, normals and textures. Changes to error messages when file not found. Turn equal ended cone into cylinder. Misc clean-up of error messages. MSDOS:Changed Watcom compile to link fpu emulation. UNIX:Misc changes from Andreas. 3.0.beta.5a 02/13/96 Chris Young Fixed free(ptr) that should be POV_FREE(ptr) in octree.c Fixed memory leak in declared ttf objects Misc video changes in MSDOSVID.C; increased MAXMODES for VESA Changed expiration date from mm/dd/yyyy to dd-mmm-yyyy Substituted latest PMODE.H & DEBUG.H 3.0.beta.5 02/07/96 Chris Young Fixed problem with gif decoder on lines longer than 2048 pixels Fixed bad error reporting when out-of-memory on calloc Fixed type cast problem in octree.c Changed beta test banner Fixed memory leak in declared material_map Various ttf fixes from Andreas Fixed watcom bug in zconf.h Updated all MS-DOS & Windows makefiles for rad_data.c Added beta expiration to MS-DOS Fixed +P in MS-DOS animations per DMF's design Misc Windows fixes for BC 4.52 Added some (tm) signs, updated some copyright notices 3.0.beta.4l 04/Feb/96 Jim McElhiney Major revision to all radiosity code Better set of sample points, stored in new lookup file rad_cache.c Multibounce radiosity now supported Error bound now adaptive with max possible contribution to surface radiosity Initialize/Deinitialize functions installed Continue trace after interrupt now supported using <myfile>.rca (Radiosity CAche file) Free of all radiosity allocated memory after each frame No more frame-to-frame cacheing bugs Default value auto calculated for Radiosity_Dist_Max: use 0 if unsure (this necessitated saving the user's "look_at" value in camera struct) Changed defaults to more general purpose values Status line on console now reports new rad samples per line for consistency with antialiasing messages Preview parameters will not allow you to choose start/end sizes which will mess up radiosity. Jitter amount in radiosity is smaller, so preview looks better. Irradiance gradients implemented, for better quality/speed ratio Combination of area lights and radiosity now MUCH faster Misc: VNormalizeEq is now faster, using mult not div Light_List_Struct was used (locally) in 2 files for 2 purposes, which messes up some debuggers. One of the structures was renamed to be unique. Light_List_Struct now saved and restored in Determine_Apparent_Colour to avoid subtle non-reentrancy bug. (trace a ray, which causes reflections at lower level to tag light source contributions as done in light_tested_struct, then pop back up to next level, and trace another ray--it used to reuse bad light calculations from deeper ray at upper level if more light testing done) Quick check in pov_shellout to avoid crashes when shellouts structure used but not init'd (not sure why, but check is safer). 3.0.beta.4k 02/05/95 Dieter Bayer Updated "Copyright 1995 Persistence of Vision Team" to 1996 3.0.beta.4j 01/29/95 Chris Young Fixed bug when #version used inside #if #else #end 3.0.beta.4i 01/26/95 Dieter Bayer Changed keyword "surface_of_revolution" to "sor" Fixed bug with three or less focal blur samples 3.0.beta.4h 01/25/95 Chris Young and Andreas Dilger One more ttf bug squashed. Misc prototypes added, unused variables removed. Minor junk. 3.0.beta.4g 01/24/95 Chris Young and Andreas Dilger Replaced default READ_ENV_VAR and PROCESS_POVRAY_INI with warnings to insure that each platform implements them. Updated libpng make files. Added "Include_Ini=file.ini" to ini parser for file names with blanks. Fixed TTF code to handle glyph spacing and spaces properly. TTF now uses the ISO 8859-1 (Latin-1) character set, but has support for other character sets once we make the parser handle it. Still can't handle multiple component glyphs (most accented characters). Increased the length of a string constant to be up to 127 characters long. 3.0.beta.4f 01/18/95 Andreas Dilger and Tim Wegner Added function calls to support libpng 0.87 error messages. Replace Libpng with version 0.87. Make sure Libpng gets copied to the correct places. 3.0.beta.4e 01/17/96 Steve Demlow Cleaned up most non-K&R compatable code (except stdarg stuff in userio.c) and compiler warnings Fixed TTF to work when sizeof(short) != 16 bits and sizeof(long) != 32 bits Fixed minor logic problems in TTF code (with help from Andreas Dilger) Changed TTF to do file error checking (thanks to Andreas Dilger) 3.0.beta.4d 01/13/96 Dieter Bayer Fixed bug in total time/frame calculations Fixed bug in atmosphere calculation (intersect_spotlight()) 3.0.beta.4c 01/13/96 Chris Young Fixed problem with animation output file numbering with subsets. Fixed problem so string identifiers can be redeclared. Fixed problem with very long string concats. Moved "ambient_light COLOR" to global_settings{...} statement. Changed global_settings { irid_wavelength { COLOR } } to... global_settings { irid_wavelength COLOR } Created Print_Authors() routine from Usage() MS-DOS: Made banner stream scrollable; added Print_Authors() to sign on. Disabled VESA debug. 3.0.beta.4b 01/01/96 Chris Young Fixed problem with transforming tiles texture identifiers. Changes from Xander to fix one ttf bug. Try those fonts that crashed. Changes from Andreas Dilger Changed order of gamma_correct() and Clip_Colour() calls to avoid doing an exponentiation with a negative base (ie pixel value). Added interrupt handler for UNIX systems to allow "safe" interruption of a trace with CTRL-C. Modified PNG file output to avoid flushing when an output buffer is used. Cosmetic changes. 3.0.beta.4a 12/20/95 Dieter Bayer Changed halo stuff to use transmit instead of filter to store the differential translucency instead of the differential opacity (change rgbf into rgbt in all your halo scenes and replace the transmittance values by 1-values) Fixed bug that occured when resuming animations (all but the first image were traced again) Fixed bug with multiple overlapping dust halos (light contribution was tested for light rays too and not only for viewing rays) Fixed sampling bug when -a and +am2 was used (now -a always casts one non-jittered sample per pixel regardless of the sampling method) 3.0.beta.4 12/08/95 Chris Young Removed build-in float constant "platform" Removed "#status" language directive 3.0.beta.3l 12/05/95 Dieter Bayer Changed PNG_POV.C to compile under GCC 2.7.1 with bounds-checking extension Changed quilt_cubic() to return values between 0 and 1 (and not 0 and sqrt(3/4)) 3.0.beta.3k 12/04/95 Tim Wegner Modified julia_fractal slice field syntax. It is now: julia_fractal { ... other fields slice <NORMAL4D>,DISTANCE } where the 3-D slice "plane" is perpendicular to NORMAL4D and is DISTANCE units from the origin. NORMAL4D is internally normalized so that DISTANCE is correct. The following are illegal: slice <0,0,0,0>,d (vector has length zero) slice <x,y,z,0>,d (t coordinate of vector is zero) The default value makes the slice "plane" the usual x,y,z space: slice <0,0,0,1>,0 The slice plane is intersected the 4-D julia_fractal object and projected to 3-D space by dropping the fourth component of all points. Also added two small fixes for Chris in texture.c and pattern.c. 3.0.beta.3j 11/23/95 Andreas Dilger Added flags to allow image file I/O routines to know how image is used. Changed PNG code to store 16-bit grayscales as true grayscales rather than heightfields, when not used as a heightfield. Changed PNG code to only do input gamma conversion for image maps, and to make the conversion to the assumed_gamma value of the scene. Changed PNG code to always write a 1.0 gamma chunk for histograms and grayscale heightfields instead of 1.0/display_gamma. 3.0.beta.3i 11/23/95 Dieter Bayer Fixed bug with superellipsoids used in CSG (this bug probably occurs in 03g and 03h only) 3.0.beta.3h 11/22/95 Chris Young Fixed problem in express.c with color vectors Added image_map{... transmit REG,VALUE} and transmit all VALUE. MSDOS: Started to implement VESA 2.0 but found other bug and fixed it. 3.0.beta.3g 11/22/95 Dieter Bayer Fixed bug in ATMOSPH.C that occured when no light sources were used Fixed bug with transparent objects blocking background Fixed bug with transparent image maps (in TEXTURE.C) as mentioned by Chris Y. Fixed bug in superellipsoid intersection test (TRUE was returned in some cases by All_Superellipsoid_Intersections() even though there was no intersection) 3.0.beta.3f 11/18/95 Chris Young Minor fractal changes by Tim Wegner Changed COEFF_LIMIT to 1e-16 fixing Watcom prism bug Fixed another #while bug MSDOS:Changed box params from char to int Fixed DJGCC use of / in argv[0] Added warning if POVINI points to non-existent fil Fixed bug in Select_VESA_Mode. Added many Debug messages in VESA, will remove later. 3.0.beta.3e 11/14/95 Chris Young Eliminate READ_ENV_VAR_BEFORE and READ_ENV_VAR_AFTER Added READ_ENV_VAR which should read a POVINI which points to the user specified global INI file. Added PROCESS_POVRAY_INI function. If there was no POVINI specified then this routine should read povray.ini from the executible directory. If there was a POVINI then this step is skipped. Removed all other automatic processing of povray.def and povray.ini even in the current directory. Converted Split_Time to SPLIT_TIME macro and added POV_Std_Split_Time Added pre_init_povray to povray.c, see comments on routine. Removed disabled field rendering for non-animations. MSDOS: Implemented MSDOS_Process_Povray_Ini and MSDOS_Process_Env PVENGINE: Partially pre_init_povray 3.0.beta.3d 11/11/95 Dieter Bayer Fixed missing initialization for Jitter_X and Jitter_Y in trace_ray_with_offset() (RENDER.C) if no anti-aliasing is used Fixed bug in do_atmospheric_scattering() that led to a lot of unnecessary neglectable samples Fixed bugs in intersect_spotlight() and intersect_cylinderlight() in ATMOSPH.C that caused lots of samples due to wrong light intervals Fixed bug in Trace() and Trace_Primary_Ray() that caused atmosphere inside hollow objects to not work properly Fixed memory problems with high +r values and adaptive sampling 3.0.beta.3c 11/09/95 Chris Cason Modified userio.c to make vsbuffer global, to allow PVEngine to allocate it and to thus call Usage () without starting up the renderer. Merged below patches from Andreas Dilger and Eduard Schwan. Eduard Schwan Fixes to truetype.c to make it Mac-friendly, by using READ_FILE_STRING for the open mode instead of "rb". Changed vbuffer.c such that the function POV_Std_Display_Plot_Box () takes int parameters for the colours, instead of chars. Andreas Dilger Moved histogram size initialization code from initialize_histogram() in render.c to fix_up_rendering_window() in povray.c so that the values are available when doing the Print_Options() call. Changed the default histogram file name to have the correct extension if the user doesn't supply the histogram file name. This is done at the options parsing stage so the filename is available for Print_Options(). Added missing histogram CSV file type to help screen display. #defined out code in radiosit.c and pattern.c that was unused. + Fixed unix config file header to match current default settings, and tried to get better default settings for maximum filename length. Added xwindows options to unix makefile, so only one makefile is needed. Removed unused variables from xwindows.c. 3.0.beta.3b 11/08/95 by Chris Young Added box drawing macro POV_DISPLAY_DRAW_BOX to frame.h and created default POV_Std_Display_Draw_Box. Needed for MSDOS version. Renamed Terminate to Terminate_POV and fixed param Changed Split_Time params to unsigned in hopes of fixing Amiga problem. MSDOS:Added non-dithered box drawing. Changed subset window to green. Fixed PNG image map palette size for grayscale images with bit-depth <= 8. Changed the method of promoting 9-15 bit OutputQuality images to fit in 16-bit colors from high-bit-set to zero-fill based on recommendations from the PNG 0.90 specification. 3.0.beta.3a 11/06/95 by Dieter Bayer Uncommented debug stuff in TRUETYPE.C Fixed bug in hfield.c/boxes.c that caused segmentation fault with DJGPP Fixed problems with comp_elements() in BSPHERE.C as suggested by Andreas Dilger 3.0.beta.3 10/31/95 by Chris Young Fixed yet another #case bug. Fixed memory leaks on multiple color_maps Fixed problem with "once" on image_maps Fixed text buffer overflow that made long smooth_triangle error msg crash Added truetype changes from Steve & Xander Added ALT_WRITE_INI_FILE macro for below WIN: Fixed rerun problem with above macro 3.0.beta.2g 10/23/95 by Chris Cason Numerous changes to support Windows code. In set_output_file_handle (), removed test where the output file handle was only set if output_to_file was TRUE to fix problem with GPF's in continue trace. Moved some typedef's, #defines, etc., from OPTIN.C to OPTIN.H. Exposed some formerly static functions/variables in OPTIN.C. Changed order of inclusion of OPTIN.H/OPTOUT.H relative to POVRAY.H in some modules as OPTIN.H and OPTOUT.H depend on a typedef in POVRAY.H. Removed most #if PRECISION_TIMER_AVAILALE tests that had been peppered throughout the code by a previous patch in line with the team's policy of keeping the use of #ifdef and so forth in the source code to a mimimum. Re-introduced these defines to one specific area of the source (the histogram code section). Added new function initialise_histogram() which will set opts.histogram_on to FALSE if PRECISION_TIMER_AVAILALE == 0. Calls to histogram code are only made if opts.histogram_on is TRUE. Re-introduced sanity-check and auto grid sizing code in histogram initialisation that had been removed by a previous patch. Added some new #DEFINE's to FRAME.H, called from POVRAY.C, to support GUI's being able to get control at specific times (such as immediately before rendering begins, to allow PVENGINE to write its own rerun information.) These are - POV_PRE_RENDER Called immediately before rendering begins. Hook any code that needs to access global data prior to rendering and/or write or display run- specific statistics into this. POV_PRE_SHUTDOWN Called just before shutdown (before destruction of any information held in memory.) Hook any code that needs to access this global data after rendering into this. POV_POST_SHUTDOWN Called after destruction of above is complete. Hook any platform-specific destructors into this. 3.0.beta.2f 10/16/95 by Chris Young Fixed #switch #case bug. 3.0.beta.2e 10/16/95 by Dieter Bayer Changed hollow keyword from a finish parameter to an object parameter (with changing all corresponding sources bugs with translucent material maps should be gone) Fixed bug with BLOB1?.POV scenes Fixed bugs in Read_Png_Image() in PNG_POV.C (png_ptr was used instead of r_png_ptr; that caused a segmentation fault with PNG image maps) Andreas Dilger or Timothy Wegener PLEASE VERIFY THIS!!! Fixed gradient and crackle bugs (hopefully; in some cases lots of speckles appeared) Fixed memory leakage in XWINDOWS.C Fixed "pause when done"-bug in XWINDOWS.C (the display window is now closed for -p and closed after pressing a mouse button in the window for +p) Fixed bug in PPM.C that caused a segmentation fault when an aborted PPM image was read Fixed supersample count bug with adaptive supersampling (the number of supersamples on the last line were displayed to be always 0) Fixed bug in halo parsing (as noted by Chris Young) Fixed bug in halo parsing (now a fatal error occurs if no color map is specified) Fixed bug in do_atmospheric_scattering (sampling took a very long time for non-white light sources because early exit did not work) Fixed bug in OCTREE.C that occured when RADSTATS was defined (the file no longer compiled as reported by Eduard Schwan) 3.0.beta.2d 10/10/95 by Chris Young Added built-in identifier t=<0,0,0,1> and vector.t capability. Fixed stuff with vector.u and vector.v. Lots of internal changes related to t, u & v. Fixed msdos error buffer problem. Following changes from Andreas Dilger Changes error messages in iff.c, gif.c, and targa.c to be consistent with other formats. Added tests for output file write errors (after c.g.r.r) Adds histogram timer for unix systems. Adds support for PNG images with both grayscale and alpha. Changed error messages to be consistent with other formats. Adds support for ASCII format PPM and PGM images, as well as allowing comments and arbitrary bit depth in input images. Added defined out code for PPM output comments ala PNG. Fixed histogram support for non-PNG images. Added output of histogram options in banner when histogram is active. Modified output of display gamma to be part of display options. Fixes resume from a file which has different size settings than those given on the command line. 3.0.beta.2c 10/06/95 by Dieter Bayer Applied noise patch by ? solves platform dependent noise problems) Added missing module headers to OCTREE.C and RADIOSIT.C Fixed bug in hfield.c (holes appeared due to missing rays) Fixed memory leak occuring with material maps 3.0.beta.2b 10/05/95 by Andreas Dilger and Tim Wegner Added gamma support. New ini option Display_Gamma=2.2 (default, can be changed in config.h) New scene command: global_settings { assumed_gamma n.nn } If not present, no gamma correction done. For platform-independent output without gamma correction, set assumed_gamma to display_gamma (e.g. 2.2). For "linear light" (gamma correction for display_gamma) use assumed_gamma 1.00. Added PNG histogram output. IMPORTANT - changes the +HT flag so that +HTN means PNG histogram, and not NO histgram. No histogram is now +HTX. Fixed bug in Close_PPM_File, changed default RENAME_FILE command 3.0.beta.2a 10/04/95 by Dieter Bayer Fixed illegal quality value bug for quality values larger 9 Fixed unused radiosity bug for quality values > 9 Fixed memory leaks with text objects Fixed bug in image reading (line_data->transm wasn't initialized to NULL in PNG_POV.C and TARGA.C) 3.0.beta.2 09/24/95 by Dieter Bayer Fixed numerical problems with far away blobs Fixed bug with high +r values (Primary rays were weighted with an ADC bailout value other than 1. That's not allowed!) Fixed bug in ra_gather() in RADIOSIT.C (ray wasn't initialized using Initialize_Ray_Containers()) Fixed bug in HCMPLX.C as mentioned by Tim Wegner 3.0.beta.1e 09/21/95 by Eduard Schwan Minor changes to resynch the Macintosh compile: PAT3b1e.pat optout.h: included frame.h, since I include it elsewhere, it needs the definition of PARAMS(). I personally think EVERY header file should be able to be compiled by itself, which means it needs to include everything necessary for itself. Then you can just add an include of it, and it takes care of its own dependencies. PATzlb1e.pat Zlib: added #ifndef around deflate.h, added include of string.h and a define of Byte to something else in zconf.h, undeffed internal_state in deflate.h. PATpng1e.pat libpng: added missing prototype for "png_output_flush" in png.h To be fixed later... I also got these warnings in LIBPNG, which should probably be fixed (missing prototypes?) Warning : function has no prototype PNGRTRAN.C line 454 { PNGRTRAN.C line 1121 { PNGRTRAN.C line 1165 { 3.0.beta.1d 09/19/95 by Chris Young Added pov_memcpy which needs to be tested by those without memcpy. MSDOS & WINDOWS: Changes to config.h in RENAME_FILE **BEWARE** the duplicate PNG.H PNGCONF.H ZLIB.H & ZCONF.H have been removed from SOURCE and exist only in SOURCE/ZLIB & SOURCE/LIBPNG. Also the COPYTO.BAT & COPYFROM.BAT files have not been updated to copy these files. You must hand copy them. Later COPYTO/COPYFROM will be obsolete so I didn't bother updating them. 3.0.beta.1c 09/18/95 by Tim Wegner Cleaned up fractal code, removed julia_parameter keyword, and added a whole lot more functions. Syntax is now: julia_fractal { VECTOR4D [quaternion | hypercomplex] [sqr | cube | exp | reciprocal | sin | asin | sinh | asinh | cos | acos | cosh | acosh | tan | atan | tanh | atanh | log | pwr(FLOAT,FLOAT)] max_iteration INT precision FLOAT slice VECTOR4D } The one function that needs explanation is pwr(FLOAT,FLOAT). This is the function (in C terminology) that raises the complex number z to the complex power (FLOAT,FLOAT). For example, the case pwr(2,0) gives the same image as sqr (though it renders much more slowly.) Most of these functions work only with algebra type hypercomplex. The only ones that work with quaternion are sqr and cube. I added a trap for this error. Note that if any of these keywords which are not already supported by the expression parser become supported in the future, then the Parse_Julia_Object() routine would need to be changed to reflect this (an easy change). 3.0.beta.1b 09/16/95 by Tim Wegner and Andreas Dilger PMG support now resumes and works for height fields, and should work for image maps and bump maps. Added Alpha support for PNG output, and made Targa and PNG handling of Alpha consistent. Added NO_MEMMOVE define to unixconf.h which uses memcpy instead on systems without memmove, and protects against copying overlapping memory areas. I've included Andreas's changes to the UNIX make file for Chris Cason's information (not intended to pre-empt any decisions about where Libpng, Zlib directories should go.) The source has been compiled with unixconf.h on AIX with the IBM xlc compiler, and it works fine so we don't need a separate rs6conf.h. 3.0.beta.1a 09/10/95 by Eduard Schwan Fixed incorrect parm passed to png_write_finish_row in PNG_POV.C. The "#define W 3" conflicted with variables in POLYGON.C if precompiled headers were used, so I changed the "W" variable names there, and moved the define from FRACTAL.H to FRAME.H, to join its buddies X,Y,Z. Removed incorrect trailing comma from ini_op enums in OPTIN.C. Added a couple more cooperates in the bounding/light buffer code, since we can be looping in there for awhile without letting the GUI breathe. 3.0.beta.0d 09/07/95 by Chris Cason Returned COOPERATE calls to a few places (probably different from original). Changed COOPERATE to COOPERATE_0 and COOPERATE_1 in source code and modified frame.h such that this would not break code depending on the use of COOPERATE. COOPERATE_0 is a high level one that is less likely to be ignored than COOPERATE_1, if the GUI's niceness setting is in mean mode. COOPERATE_0 is intended to be called less frequently by the renderer. Added POV_PRE_PIXEL and POV_POST_PIXEL which always get called even if display mode is turned off. Both macros take x, y and colour. 3.0.beta.00c 09/05/95 by Tim Wegner You should delete the files gfract.* (obsolete) and julia.* (renamed). The patch file will create two new files quatern.c and quatern.h which were formerly the julia.* files. Completely reorganized the fractal format. The new syntax for the fractal object is as follows, with all parameters optional, and in any order: julia_fractal { julia_parameter VECTOR4D quaternion | hypercomplex sqr | cube | exp | reciprocal max_iteration INT precision FLOAT slice VECTOR4D } sqr was z2 and cube was z3. The old "fractal" is obsolete. The old "julia" object is what you get with the quaternion keyword present. The slice keyword is new. It allows the 4D fractal object to be sliced by a 3D "plane" at any angle. There's a new routine called parse_Vector4D() in case anyone needs it for other purposes. 3.0.beta.00b 09/03/95 by Dieter Bayer Added PNG support by Tim Wegner and Andreas Dilger Added Bits_Per_Color/Bits_Per_Colour INI file keyword (used by PNG) Added Andreas Dilger to the contributing authors list Added redirection options to the render option output Added matrix transform to all places where transformations are allowed Moved hollow keyword into finish statement. NOTE that in order to see any halos inside an object you have to make sure that the finish is set to hollow Changed "r" file options to READ_FILE_STRING (that's "rb") Renamed PNC.C to PNC_POV.C and added PNG_POV.H to avoid conflicts with PNG.C and PNG.H that come with the PNG library Renamed project_* functions in VBUFFER.C in order to avoid problems with the Watcom linker Fixed bug that occured in MSDOSVID.C when the console output of the render stream was turned off (a segmentation violation occured due to a NULL pointer access in Viewit) Fixed bug in halo default color map assignment Fixed some memory bugs in PNG_POV.C Fixed bug in multi-textured blobs Updated MSDOS DJGPP make & link files and Unix makefiles 3.0.beta.00a 08/29/95 by Dieter Bayer Added Zsolt Szalavari to the contributing authors list Replaced strupr() and strlwr() in express.c by own functions to make it work with Unix and other systems that don't have those functions Removed unused distance parameter from halo Fixed help screen problems Updated Unix make files 3.0.beta.0 08/29/95 by Chris Young Added #ifdef (IDENTIFIER) language directive. See VECT2.POV Added %w and %h (width, height) substitution for shell strings Added black_hole warps by Chris Cason Dropped dump and raw format. Remove DUMP.C DUMP.H RAW.C RAW.H Added re-directable macros for new "sys" file type for system specific format such as Mac Pict or Windows BMP. Macros in FRAME.H. Support added via "sys" keyword such as "image_map{sys "file.ext"..." and via +FS switch. Added string functions "strupr(STRING)" and "strlwr(STRING)" same as C Added built-in UV_VECT constants "u" value <1,0> and "v" value <0,1> Added . period operator for VECT.x VECT.y VECT.z UV_VECT.u UV_VECT.v COLOR.red COLOR.green COLOR.blue COLOR.filter COLOR.transmit Added built-in float constant "platform". Defined in CONFIG.H Added boolean function "file_exists(STRING)" searches current dir and +L Added integer function "strcmp(STRING1,STRING2)" same as in C strcmp Changed string function "num_to_string(F,W,P)" to "str(F,W,P)" Changed float function "atof(STRING)" to "val(STRING)" Changed variables "Point" to "IPoint" in HCMPLX.C Fixed spelling on "eccentricity" Fixed bugs in #if #else Minor change in default file processing Misc Error and Warning message changes by Dieter Updated make files for removal of dump and raw. 3.alpha.0.19 08/27/95 by Dieter Bayer Added halo stuff by Zsolt Szalavari (did some changes and improvements). The syntax is (docs will follow later, sigh): texture { halo { attenuating | emitting | glowing | dust constant | linear | cubic | poly planar_mapping | spherical_mapping | cylindrical_mapping | box_mapping fog_type FLOAT max_value FLOAT exponent FLOAT samples FLOAT aa_level FLOAT aa_threshold FLOAT turbulence VECTOR octaves FLOAT omega FLOAT lambda FLOAT colour_map COLOUR_MAP frequency FLOAT phase FLOAT scale VECTOR rotate VECTOR translate VECTOR } } Added matrix transform by Steve Demlow (see sample scenes matrix.pov, shear1.pov and shear2.pov) Added distance based light attenuation for translucent objects. Syntax: finish { ... fade_distance FLOAT fade_power FLOAT ... } The light is attenuated in a linear, quadratic, cubic, etc. fashion (according to the fade_power value). At distance fade_distance the attenuation is 50% (see sample scene atten1.pov). Added new atmospheric scattering type 5 (Heyney-Greenstein function with paramter given by "excentricity" keyword) Added attenuation of light coming from light sources due to fog and/or atmosphere (by default this is not used, i.e. the light is not attenuated; the keyword "atmospheric_attenuation" is used with light sources to switch the attenuation on/off) (see sample scene fog2.pov) Added attenuation due to fog and/or atmosphere inside an object (by default this is off, i.e. there's no fog/atmosphere inside any object; this can be changed by using the keyword hollow, i.e. hollow FLAG) (see sample scene fog2.pov) Modified and simplified atmosphere supersampling Removed unnecessary support for bounded fog Fixed bug in Test_Shadow() (LIGHTING.C) Fixed bug in trace_pixel() (RENDER.C): uninitialized variables Fixed bug in Global_Setting_Warn(), PARSE.C Fixed bug in Post_Tnormal(), NORMAL.C (slopemap.pov) Fixed memory problem detected by Purify in Destroy_Blob(), BLOB.C Fixed memory problem detected by Purify in Create_BMap_Entries(), COLOUR.C Fixed memory problem detected by Purify in Create_Fractal(), FRACTAL.C Fixed memory problem detected by Purify in Read_Gif_Image(), GIF.C Fixed memory problem detected by Purify in Get_Dump_File_Handle(), DUMP.C Fixed memory problem detected by Purify in Get_PPM_File_Handle(), PPM.C Fixed memory problem detected by Purify in Get_Raw_File_Handle(), RAW.C Fixed memory problem detected by Purify in Get_Targa_File_Handle(), TARGA.C Fixed memory problem detected by Purify in Tokenize_Renderer(), RENDER.C Lots of cosmetic changes (new header layout, added headers) Updated MS-DOS make & link files Updated Unix make & link files Updated Unix xwindows.c file (new file supports true color displays) 3.alpha.0.18t 08/15/95 by Chris Young Added "brick_size <VECTOR>" and "mortar FLOAT" Other brick changes. Added shellout return code processing. MSDOS:Changes to implement return codes. 3.alpha.0.18s 08/08/95 by Dieter Bayer Added Pascal Massimino and Timothy Wegner to the credit screen Split credit screen into primary developer and major contributor part Removed useless VSqr() macro Fixed some field rendering problems Fixed unwanted jittering of inital rays in antialiased images Fixed unwanted jittering with non-antialiased images Fixed bounding bug in BLOB.C 3.alpha.0.18r 08/07/95 by Chris Young Fixed problems with \ in file names. Moved caustics code to fix texture_map bugs. Removed Max_Symbols, +QH and radiosity from INI & switches. Added global_setting { irid_wavelength COLOR max_trace_level FLOAT // int internally adc_bailout FLOAT number_of_waves FLOAT // int internally max_intersections FLOAT // int internally radiosity { brightness FLOAT count FLOAT // int internally distance_maximum FLOAT error_bound FLOAT gray_threshold FLOAT low_error_factor FLOAT minimum_reuse FLOAT nearest_count FLOAT // int internally recursion_limit FLOAT // int internally } hf_gray_16 [FLOAT] // optional boolean } Fixed #while(COND) bug Some truetype updates from Xander. MSDOS:Updated make files. 3.alpha.0.18q 08/06/95 by Dieter Bayer Added field rendering command line switches (+UF +UO) Added anti-aliased focal blur (Standard aa is switched off when focal blur is used. The user is warned about this.) Added early exit test for focal blur based on confidence test New camera keywords: confidence - Determines how sure the confidence test is, i.e. how likely the pixel color is "close" to the real value. The default value is 0.9. variance - Maximum allowed variance. If the variance of the samples in a pixel is greater than this value the maximum number of samples will be used (i.e. the blur_samples value). This parameter should be of the same magnitude as the color resolution (on an 8bit per color display the color resolution is 1/2^8). The default value is 1/128. Added adaptive supersampling method (ini file: Sampling_Method): +AM1 : non-adaptive supersampling +AM2 : adaptive supersampling Fixed some bugs I introduced in 18p due to patch problems Fixed some field rendering bugs: odd/even line tracing switches from frame to frame now unnecessary supersampling of pixels above the current line is avoided 3.alpha.0.18p 08/03/95 by Dieter Bayer Fixed focal blur bug I introduced with patch 18l Fixed resampling bug of center sub-pixel during supersampling Fixed bugs in matches() (OPTIN.C) Changed some calls and other (unnecessary) stuff in RENDER.C 3.alpha.0.18o 08/03/95 by Jeff Bowermaster Implemented Field Rendering for NTSC/PAL Animation Keywords "Field_Render=bool" and "Odd_Field" substituted for Interlace.. 3.alpha.0.18n 07/31/95 by Chris Young Fixed big problem with Keyword=bool Other minor changes 3.alpha.0.18m 07/28/95 by Chris Young New string manipulation functions... num_to_string(VALUE,LENGTH,PRECISION) creates string from float value chr(VALUE) creates 1 character string, e.g. chr(169) makes a copyright concat(STRING,STRING) concats two strings substr(STRING,START,LENGTH) e.g. substr("ABCDE",2,3) returns "BCD" New float valued functions... atof(STRING) returns float value represented by string atof("1.2")=1.2 asc(STRING) returns ASCII value of first char of string, asc("A") is 65.0 strlen(STRING) length (in chars) of string (see STRINGS.POV) New language directives print messages (see MESSAGE.POV) #warning STRING #debug STRING #error STRING #render STRING #status STRING #statistics STRING During parsing, sends string to corresponding text stream String expressions above work for ttf, #include and image_map, bump_map, material_map names. Basically all strings. Can declare string identifiers. Partial support for \n \r \t etc. Only works in messages, not in ttf. Changed Bits_Per_Pixel to Output_Alpha=bool and +UA -UA Implemented #while (COND)... #end loop (see WHILE1.POV) MSDOS: Remove ICB compiler support, removed TARGA+ board support IBM: Dropped whole MACHINE\IBMPC directory. 3.alpha.0.18l 07/26/95 by Dieter Bayer Changed a lot of memory allocations in BBOX.C, LBUFFER.C, LIGHTNING.C, MESH.C, VBUFFER.C and VLBUFFER.C in order to avoid unnecessary mallocs/ frees during the main tracing loop Changed DEPTH_TOLERANCE in planes.c due to infinite loop with SKYVASE.POV Changed calls to free() and malloc() into calls to POV_FREE() and POV_MALLOC() in OCTREE.C, PPM.C and RADIOSIT.C (the memory allocated during radiosity isn't freed yet!) Fixed bug in rainbow arcs when a filter value is used (the rainbow didn't fade away anymore) Fixed "Refrated" typo in OPTOUT.C Fixed focal blur bug (the focal plane is in the right place now) 3.alpha.0.18k 07/25/95 by Eduard Schwan Changed r,g,b,a parms in POV_Std_Display_Plot & Rect in USERIO.C/H from unsigned char to unsigned int to resolve a Mac (Metrowerks) compiler bug (MW got confused on the mixed K&R and ANSI styles for these.) Fixed inconsistencies & Mac problems in JULIA.C/H. Some prototypes left out the parameter name, some function decl.s were ANSI, and the Macintosh has a type defined as "Point", so I renamed all "Point" parameters to "point". Added a COOPERATE call in BBOX.C during sort_and_split, so Macs don't hang during the building of big bounding box trees. Fixed Truman's "disappearing cylinder" bug in MATRICES.C, changed the ever-questionable "if (fp==1.0)" to the more robust "if (fabs(fp-1.0)<Eps)" 3.alpha.0.18j 07/23/95 by Chris Young Made -B switch turn buffer off, added Buffer_Output=bool Rewrote some of text redirection, fixed bugs, made =bool work for any bool Fixed Create_Ini=bool Deleted Banner_File and Banner_Console redirection Deleted +@ -@ stuff, replaced with warning message. Deleted +Z -Z Debug= stuff Moved mosaic preview error checking and relaxed it. Other mosaic preview and radiosity preview fixes. Turned Gamma_Correct into optional macro. MSDOS:Turned dither off in draw box and Plot_Rect. MSDOS:More make file changes/fixes 3.alpha.0.18i 07/20/95 by Chris Young Added Interlace= and Interlace_Odd= INI settings but did not implement actual odd/even interlace. Added +Q10 to turn radiosity on but did not yet make other radiosity changes nor did not yet do radiosity{...} statement. Added User_Abort_Command=sss and Fatal_Error_Command=sss shell outs. Removed +MS -MS and replaced it with Warning Removed +NFI +NFF +Unnn switches Removed VerboseFormat Fixed bug that light buffer INI set vista buffer by mistake Fixed #ifdef PRECISION_TIMER_AVAILABLE that should have been just #if Updated various MS-Dos make files for fractal stuff Fixed bug in MSDOS\COPYFROM.BAT that copied MSDOS\*.* files into compiler-specific directories by mistake. If you have a file in a compiler-specific directory that is also in MACHINE\MSDOS then delete it from the compiler-specific directory and only keep it in MACHINE\MSDOS. 3.alpha.0.18h 07/16/95 by Dieter Bayer Added extra stats to the stats screen Added code to LIGHTING.C, RENDER.C and VBUFFER.C to use the transmittance value of a pixel for the alpha channel Added Pascal Massimino's fractal stuff (adopted by Tim Wegner) Changed parameters to Intersect_Sphere() function Changed fractal bounding sphere tests to call Intersect_Sphere() Fixed bug with pigment colors of the type rgbt<0, 0, 0, t> with t > 0 3.alpha.0.18g 07/12/95 by Dan Farmer Reversal of patch 3.alpha.0.18c (Garnder clouds removed). 3.alpha.0.18f 07/12/95 by Chris Young Moved the Pre-Frame and Post-Frame commands to different location. Added screen save/restore in MSDOS version before/after all 4 shellouts. Fixed 0.0 to 1.0 range on wrinkle and waves pigment. Added Histogram_Type=N for no histograms. Fixed various Create_INI=rerun.ini problems. Fixed bug with continued animations. Added substitution options to the shellout commands. New options are %s for scene name, %f for frame number and %k for clock value. 3.alpha.0.18e 07/07/95 by Dieter Bayer Added check for zero memory allocation to mem.c (only if MEM_HEADER is defined) Added caustics keyword to finish structure (caustics FLOAT). Default is 0, i. e. no caustics are simulated. A good value for caustics is 1.0 Changed mesh counters from int to long Removed obsolete caustics_power ini keyword Fixed zero allocation list of temporary light list in lighting.c Fixed extra data bug in GIF.C as suggested by Chris Cason 3.alpha.0.18d 07/05/95 by Chris Young Added default extensions for all input files (.pov, .inc, .tga, .gif etc) Added default output file name based on input file name. Fixed bugs in .INI parsing which cause some options to be wiped out. Fixed bug which caused superelipsoids not to work in csg. Added text buffers with scroll-back to MSDOS version. Misc cleanup of MSDOSTXT.C, MSDOSVID.C and IBM.C and make files. 3.alpha.0.18c 06/22/95 by Dan Farmer Added Gardner-style cloudplane pigment. 3.alpha.0.18b 06/22/95 by Chris Young Changed "display_..." functions to "POV_DISPLAY_..." macros. Added alpha output to POV_DISPLAY_... so Mac version can save alpha Began major restructuring of MACHINE\IBM into MACHINE\MSDOS. Added Kendall's console handling stuff to MSDOS vers. 3.alpha.0.18a 06/17/95 by Eduard Schwan Removed unnecessary COOPERATE calls bogging down Mac version. Fixed check_stats to display mosaic information and initial clock info. Moved a too-tightly-nested CR output in verbose mosaic mode. 3.alpha.0.18 06/09/95 by Chris Young Major clean-up of last several patches. Fixed Library_Path= bug. TTF file open now searches +L paths. Major memory leaks fixed in tiles, texture_map and ttf. 3.alpha.0.17m 06/09/95 by Dieter Bayer Added alpha channel support for Targa files (+f32 command line option and Bits_Per_Pixel ini file option to save 32bit Targas; they are automatically detected during reading and the alpha channel is used as transmittance. The alpha channel is non-premultiplied and uses a value of 0 for 100% transparency and a value of 255 for 0% transparency) Fixed missing output filename bug when no filename was given Fixed bug in Compute_CSG_BBox (wrong size to POV_REALLOC()) 3.alpha.0.17l 06/07/95 by Chris Dailey Moved options into a single structure in povray.h Moved statistics into an array, indices denoted by an enum Created total statistics array Move Post_Frame_Cmd_String to after closing of output file to avoid contention with shelled out program Made +SF, +EF handle more like +SR/+ER and +SC/+EC in optin.c Changed FrameData to FrameSeq Updated machine-specific os2conf.h and bcos2.mak 3.alpha.0.17k 06/04/95 by Chris Young INI-style values may now contain blanks. No longer need %b in shell commands. Implemented bracked sections of INI file. Put "MYFILE.INI[MYSECTION]" on command line. Only the section [MYSECTION] of file MYFILE.INI is read. If no section specified, only unlabled part of INI read. Fixed latest #switch #range bug reported by DMF. 3.alpha.0.17j 05/31/95 by Chris Young Yet another bug fixed with #if #else and #declare Reversed 17h some changes to restore +KF and +KFF 3.alpha.0.17i 05/30/95 by Dieter Bayer Added GET_KEY(x) macro to machine config files (ibmpc, os/2) Fixed bug in mesh normal calculation (missing test for null pointer) Fixed bug in continued animations (only parts of frames where traced after one image was aborted) 3.alpha.0.17h 05/27/95 by Chris Dailey Removed Subset_Start_Pct and Subset_End_Pct, moved their functionality to Subset_Start_Frame and Subset_End_Frame Allow +SF1.0 and +EF1.0 as special case for last frame Almost changed flags +KFL and +KL to +KFF and +KF for Initial/Final terminology consistency, but +KFF & +KF are tricky. Instead used +KI and +KF for clock Initial/Final, +NFI and +NFF for number frame Initial/Final Fix help output for above option changes More changes to option screen for animation Added POV_SHELLOUT, POV_SYSTEM, and POV_MAX_CMD_LENGTH macros to frame.h, (overridable in config.h) Added Pre_Render_Command, Pre_Frame_Command, Post_Frame_Command, and Post_Render_Command .ini file keywords; %b is for a blank, for _Frame_ %o is output file name 3.alpha.0.17g 05/23/95 by Chris Young Fixed a bug with #if #else and #declare 3.alpha.0.17f 05/23/95 by Dieter Bayer Added code for cyclic animation support (+KC switch, Cyclic_Animation keyword) Added help screen menue support (define GET_KEY(x) in config.h to get menue to work! For MS-DOS that's #define GET_KEY(x) {(x) = getch();} ) Added animation options to option screen Changed option screen layout (slightly!) 3.alpha.0.17e 05/17/95 by Dieter Bayer Added code for faked caustics 3.alpha.0.17d 05/16/95 by Dieter Bayer Modified mesh triangle calculation Fixed "atmopshere in objects"-bug (atmospheric effects are not calculated when inside a transparent object) Fixed bug in smooth triangle normal calculation in MESH.C 3.alpha.0.17c 05/14/95 by Chris Dailey Corrected default clock value bug introduced in 16L Added animation status lines, made slight newline mods to others Separated out initialization of statistics, print statistics for each frame instead of whole animation Don't use tparse as a temporary variable in optout.c, its value needs to stay unchanged between frames to avoid exponential growth Changed animation defaults as discussed in forum Changed animation parameter .ini file names (removed Clock_ prefix) Changed to "Initial"/"Final" terminology for whole animation definition, "Start"/"End" terminology for animation subset definition. This includes variable names and .ini file names Changed filename generation scheme to figure out how many chars the frame number takes up in the output filename Split setup_output_file() to setup_output_file_name() and open_output_file() to aid in future "shell out" feature after filename determination and before opening Added POV_NAME_MAX definition to frame.h, overridable in config.h 3.alpha.0.17b 05/11/95 by Dieter Bayer Added filtering fog (color ... filter) and transmittance threshold (transmit x) Added missing keywords to the ini-file parser (Vista_Buffer, Light_Buffer, Draw_Vistas, Split_Unions, Remove_Bounds) Changed triangle mesh syntax (mesh{} instead of triangle_mesh{}) Changed atmosphere syntax (scattering instead of reflectivity) Changed rainbow syntax Changed radiosity options help screen to fit on a 80x25 screen Changed "Copyright 199x" into "Copyright 1995" Changed structs in OCTREE and RADIOSIT into typedefs Fixed bug in triangle mesh to make the hierarchy flag work correctly Fixed bug in triangle mesh intersection point test ("missing shadow bug") Fixed animation loop bug in POVRAY.C as mentioned by Chris Dailey Removed vista/light buffer tree traversal methods (+up option) Removed '#include <stdlib.h>' from RENDER.C 3.alpha.0.17a 05/02/95 by Chris Cason Added histogram code. Misc spelling fixes, particularly variable Help_Available (:-). 3.alpha.0.17 05/02/95 by Chris Young Now possible to do #declare everywhere, even within objects (I think?) Fixed destroy slope_map bug. Misc bug fixes from recent patches. 3.alpha.0.16l 04/28/95 by Chris Dailey ANIMATION CHANGES: parse.c Make pointer NULL after Destroy()ing its contents for Camera, do so for Texture while at it povray.c Moved Initialize_noise() out of FrameRender() loop povray.c Added Frame Number as @-escape to Output_File_Name: @[0]n, where n=max digits. eg, file@3.tga would give file34.tga, file@03.tga would give file034.tga. I know, @3 is no different than @7, we'll have to come up with a more logical scheme. povray.c Added animation loop povray.c renamed setup_renderer() to setup_output_file() povray.c Moved Initialize_Renderer() call into FrameRender() povray.c Move set_output_file_handle() call into setup_renderer() povray.c Move a large chunk of main() into new FrameRender() function express.c Yet slightly different behavior for Clock used without being set - inform user about default value, show warning only once NON-ANIMATION CHANGES: moved streams_init() call from mem.c to povray.c cones.c:'Cone_Methods'/discs.c:'Disc_Methods'/bezier.c:'Bicubic_Patch_Methods'/ julia.c:'Julia_Methods' is declared as both external and static fixed by removing its extern declaration in cones.h/discs.h/bezier.h/julia.h lighting.c moved a brace as requested by Dan Farmer in message #110124, which makes calling of do_irid() independent of light source type converted mem.c function headers from true ANSI to middle ANSI-K&R (*sigh*) modified other files to user userio.h, mem.h split memio.c/h to create mem.c/h and userio.c/h radiosit.c changed ra_average_near() to be usable as parameter to ot_dist_traverse(), prototype in radiosit.h. Note - someone should probably REALLY change ot_dist_traverse so that handle,handle1 are struct wt_avg *, but I don't feel confident enough to do this memio.c changed false->FALSE, true->TRUE to fix undefined symbol 3.alpha.0.16k 04/18/95 by Steve Demlow Fixed stream redirection for non-standard I/O functions Included octree.h in various places to define a type for radiosit.h Fixed memory leak in Allocate_Text_Streams in optin.c 3.alpha.0.16j Apr 16/95 by Jim McElhiney Added first version of all radiosity code -radiosity source files (radiosit.c, radiosit.h, octree.c, octree.h) -new flags -new progress messages -new mosaic preview function...could be integrated in future -trace() returns distance to object hit Gamma correction function installed in code, but no option sets it -if you want to try this, set values in source in Gamma_Correct() Smooth_Preview capability in the mosaic preview. -Like Gamma correction, there is no switch for this. Change the variable Smooth_Preview to try it...it is used only when radiosity is on. Small change to crackle to avoid value wraparound bugs -note values returned are about 10% smaller...may need colour map change Fixed some small compiler issues -unused locals in targa.c and truetype.c -memory addressing error in parse.c -signed/unsigned mismatch warnings in 7 files -floating point errors in boxes.c and julia.c Note: error in julia.c is flagged, but NOT FIXED...for Dieter to check? One user interface change: -when using mosaic preview, when it completes, it now falls through to do the regular detailed trace. Radiosity requires this behaviour, and I changed it for the regular mosaic preview to match. 3.alpha.0.16i 04/09/95 by Dieter Bayer Added arc to the rainbow (syntax: rainbow { up <VECTOR> - rainbow's "up" vector, i.e. angle = 0 falloff_angle1 FLOAT - angle of solid rainbow part falloff_angle2 FLOAT - angle of total rainbow } The rainbow arc goes from -falloff_angle2 to +falloff_angle2 and is blended into the background from -falloff_angle2 to -falloff_angle1 and from falloff_angle1 to falloff_angle2, i.e. the "solid" (i.e. unblended) part of the rainbow goes from -falloff_angle1 to +falloff_angle2. If falloff_angle1 is omitted no blending takes places. If falloff_angle2 is omitted the arc covers 360 degrees. Added seconds time stats. Changed help screen layout Moved ini-file and command line parser into OPTIN.C/OPTIN.H Moved code from main() into new functions Fixed memory leakage in Copy_Rainbow() in ATMOSPHERE.C Fixed memory leakages that occured if redirection was used (using POV_REALLOC() instead of POV_MALLOC() in process_variable() in OPTIN.C) Fixed prototypes in POVRAY.C Fixed divide by zero bug in Print_Stats() in POVOUT.C Renamed OPTIONS.C/H to OPTOUT.C/H 3.alpha.0.16h 04/07/95 by Chris Young Fixed expression parse bug when parens used around vector. Fixed problems in counter_to_string where \0 was written beyond end of string and leading spaces were too long. Fixed memory leaks when previous blend map is overwritten. 3.alpha.0.16g 04/05/95 by Dieter Bayer Added syntax of animation options to help screen Added FRAND() macro to TEXTURE.H to generate random number x (0 <= x <= 1) Changed POV_Std_rand() to use faster shift instead of divide Changed calls to POV_RAND() into calls to FRAND() were applicable Fixed memory leakage in stream allocation 3.alpha.0.16f 04/04/95 by Steve Demlow Added options, for each output text stream, to turn off console output and/or to write to a default or specified file. Added option to write all .INI settings to a file. Added stdin support for script files and stdout support for output image files. Turned off "Press any key" message if no WAIT_FOR_KEYPRESS is defined. 3.alpha.0.16e 04/4/95 by Eduard Schwan Added missing prototype for alt_main in POVRAY.H Added MAIN_RETURN_STATEMENT at end of main() in POVRAY.C Optimized the way Authors strings were allocated and displayed in OPTIONS.C Moved the COOPERATE calls around a little to gain some Mac speed 3.alpha.0.16d 03/29/95 by Chris Young Added #switch, #case, and #range directives. Fixed #if #else bugs. Reversed a 16b patch that causes fatal errors when clock used without being set. Changed to warning. Uses default clock=0.0. Fixed +Knnn.n switch bug. Tiny change in options.c for extra precision counters. New scene files. Delete CASE1.POV & CASE2.POV. No longer valid. 3.alpha.0.16c 03/28/95 by Dieter Bayer Updated credit screen Fixed bug in triangle scaling Fixed bug in triangle mesh bounding box calculation 3.alpha.0.16b 03/26/95 by Chris Dailey Added preliminary animation support, including command line args, ini file support, variable storage, and a little consistency checking. Fixed a small bug with LAST_OPTION Some OS2 files updated for 3.0 3.alpha.0.16a 03/24/95 by Dieter Bayer Added support for targa type 11 files Added support of high resolution counter (64bit), currently up to 15 decimal digits are used for counter output (counter length defined in FRAME.H) Changed stats screen layout Changed BOUND_HUGE to 2e10 to avoid floating point overflow as noted by Jim McElhiney Fixed wrong COMMA_TOKEN in TOKENIZE.C Fixed unitialized color bug in material_map 3.alpha.0.16 03/13/95 by Chris Young Added #if (COND) #else #end and #if (COND) #end parsing. Misc fixes and things necessary for #if and future conditionall stuff. Full sync of all files. 3.alpha.0.15n 03/10/95 by Chris Young Fixed Make_RGB bug in Create_Finish Deleted extra braces in default color maps Changed && to || in deciding when to do reflection 3.alpha.0.15m 03/08/95 by Dieter Bayer Added colored reflections (finish { reflection <COLOR> } ) Added individual ambient color (ambient <COLOR>). Note that a modifications to Parse_Colour() has still to be made to be able to parse only one float. Currently there's only a temporary fix in EXPRESS.C as suggested by Chris Y. Added ambient_light { color <COLOR> } for global ambient lighting Fixed "Initialization is only partially bracketed" warnings Fixed bug in POLY.C 3.alpha.0.15l 03/02/95 by Dieter Bayer Changed no_hierarchy to hierarchy keyword (switch by on/off, true/false, ...) Fixed bug in Bool_Flag() in OBJECTS.H Fixed bug in height field scaling (it now works according to the docs) Fixed bug in height field dda traversal Fixed bug in height field triangle intersection Made some changes to POLY.C Renamed Point variables in MESH.C 3.alpha.0.15k 02/28/95 by Chris Young Added repeat warp with offset and flip. For example: warp {repeat 3*x offset <0,0.2,0.5> flip y} Repeats the pattern every 3 units in the x direction. Offsets each successive copy by "offset". Offsets accumulate. Flip alternate odd/even copies in the specified direction. Specifically "flip y" does "scale <1,-1,1>" to odd copies. Deleted translate, rotate, scale & transform inside warp{...} stmnt. Misc internal warp changes and bug fixes. 3.alpha.0.15j 02/27/95 by Dieter Bayer Added automatic resizing of symbol and constant tables Changed triangle mesh triangle texture syntax to texture { Name } Fixed bug in height field bounding box calculation Fixed some compiler warnings 3.alpha.0.15i 02/23/95 by Dieter Bayer Modified height field normal calculation and triangle intersection (small speed-up) Fixed a bug in height field intersection testing 3.alpha.0.15h 02/23/95 by Dan Farmer Added 16 bit grayscale output for all output types (tga, tga-compressed, ppm, raw, dump). Currently uses +FxH commandline switch (where "x" is the mode), but may be changed to a +Q setting in the future. Sets the grayscale palette for preview mode when 16 bit output mode is in effect. 3.alpha.0.15g 02/23/95 by Dieter Bayer Added individual texturing of triangles to triangles meshes Merged calls to functions for atmospheric effects into two new functions: Do_Infinite_Atmosphere() and Do_Finite_Atmosphere() to avoid a copy of all these calls in RENDER.C and VBUFFER.C 3.alpha.0.15f 02/22/95 by Chris Young Added warp{...} statement to Parse_Pattern Implemented turbulence warp and transformation warp Included hooks for repeat, spiral and black_hole warps. Added WARPS.C and WARPS.H Updated DJGCC & Borland make files (need to verify dependency) 3.alpha.0.15e 02/22/95 by Dieter Bayer Added the call to plot_pixel() to Supersample() that I removed earlier Fixed bug in height field bounding box calculation (PARSE.C) 3.alpha.0.15d 02/20/95 by Dieter Bayer Fixed bug in HFIELD.C (DDA setup) Fixed bug in QUADRICS.C (intersection test) 3.alpha.0.15c 02/15/95 by Dieter Bayer Added triangle_mesh syntax Added pseudo-number generator in TEXTURE.C Rewrote HFIELD.C Changed triangle mesh data structure (normals of unsmoothed triangles are now also stored as indices into the normal list) Changed calls to rand() and srand() into calls to POV_RAND() and POV_SRAND() Replaced In_Polygon with a much faster version by Eric Haines from GGems IV Removed support for raw files Removed unnecessary call to display_plot() from Supersample() in RENDER.C Removed unnecessary function surface_area() from BBOX.C Fixed bug in Solve_Polynomial() with higher order polynomials 3.alpha.0.15b 02/13/95 by Dieter Bayer Added smoothing to triangle mesh object Added raw keyword to triangle mesh syntax to specify the raw file Added autodetection of 9, 12, and 18 numbers/triangle raw file format Fixed several bugs in MESH.C Fixed bug that occured when the priority queue was resized (BBOX.C) Fixed bug in VBUFFER.C Fixed bug with +ms option to make it work as intended Fixed bug with help option -h Fixed bug in BBOX.C with number of objects smaller than threshold (+mb) 3.alpha.0.15a 02/06/95 by Dieter Bayer Added triangle mesh object (reads RAW format; no smoothing yet) Added -h? options to show help screens Changed BOUND.C: SNGL instead of DBL is used to store bounding boxes (Beware that Assign_Vector() doesn't work with bounding boxes; use Assign_BBox_Vector() instead. Be aware of the new bbox macros in FRAME.H); functions to build and intersect a bbox tree are now reentrant. Changes to BLOB.C (max. number of elements is arbitrarily set to 1,000,000; data structure changed; bounding sphere stuff moved into BSPHERE.?) Changed sky_sphere to make use of the filter and transmittive parts of a color (filtered and unfiltered translucency) Changed help and credit screens Changed TRIANGLE.C Fixed bug with transformed spotlights Fixed bug in Compute_Triangle() that set correct triangles as degenerate Renamed BOUND.? into BBOX.? (remove BOUND.?) Created BSPHERE.C and BSPHERE.H 3.alpha.0.15 01/30/95 by Chris Young Added "average" pattern type for pigment, normal and textures. Includes Xander's latest truetype code. Misc. cleanups. 3.alpha.0.14i 01/29/95 by Chris Cason Added PPM & PGM file format support for image_map, bump_map, material_map and height_field. Added PPM output via +FP switch. New files PPM.C, PPM.H, PGM.C, PGM.H files. Make files must be updated. 3.alpha.0.14h 01/25/95 by Dieter Bayer Added cylindrical light source. 3.alpha.0.14g 01/24/95 by Chris Young Added "turb_depth" keyword for fog & mist. The "turbulence <nnn,nnn,nnn>" continues to control the size of the turbulence pattern in the x,y,z directions while turb_depth varies the front-to-back depth of the turb. Typical turb_depth should be 0.0 to 1.0 with the default 0.5. Fixed highlights and fill lights as requested by DMF Misc cleanup of "variable assigned value that is never used" warnings. 3.alpha.0.14f 01/23/95 by Dieter Bayer Added auto-bounding of elliptical paraboloids Fixed bug with distance=0 in fogs Fixed problems in Compute_Quadric_BBox() 3.alpha.0.14e 01/20/95 by Chris Young Height field bug fixed Removed duplicate call to close_all Minor BC++ 4.5 fixes 3.alpha.0.14d 01/18/95 by Dieter Bayer Changed calculation of attenuation for fading light sources (light color at fade_distance equals the specified light color) Fixed bug with mists/fogs and infinite rays Fixed bug with multiple fogs Fixed bug with atmosphere and area light sources Fixed bug with clipped polys 3.alpha.0.14c 01/13/95 by Dieter Bayer added fade_distance to light sources Changed calculation of attenuation for fading light sources Changed falloff_power to fade_power Fixed bug with overlapping rainbows 3.alpha.0.14b 01/10/95 by Chris Young Implemented built-in float identifiers "on", "true", "yes" with value 1.0 Implemented built-in float identifiers "off", "false", "no" with value 0.0 Added float functions acos(A) arc-cosine of A asin(A) arc-sine of A tan(A) tangent of A Added additive (non-filtered) transparency via 5th color channel. Added "transmit" keyword (for example "color red 0.6 transmit 0.7") Added "rgbt" and "rgbft" keywords (similar to "rgbf" but for transmit). The amount of the transmit value is the percent of light that is allowed to pass through in a non-filtered way. Note that light from the object itself is diminished by (1.0-transmit) so a transmit value of 1.0 means that the object totally disapears. 3.alpha.0.14a 01/10/95 by Dieter Bayer Added volume rendering to simulate atmospheric scattering Added light attenuation due to light source distance Changed sky_blend to sky_sphere Fixed a bug in PARSE.C with planes and 'zero' normals Fixed a bug in POVRAY.C that occured when diskwrite was suppressed Removed YZFog Removed some unused variables from LIGHTING.C and RENDER.C Removed (temporarily) support of bounded fog (this is probably something for version 4 because a redesign of the intersection functions for a better CSG handling would help pretty much) 3.alpha.0.14 01/09/95 by Chris Young Added declared fog, rainbow, skyblend Added several new keywords to parser but have not yet implemented them Fixed empty bounded_by or clipped_by bug 3.alpha.0.13g 01/05/95 by CY Adds texture_map and makes changes to tiles & material_map Open handle fix from Eduard 3.alpha.0.13f 01/02/95 by Xander uploaded by CY TRUETYPE.C changes to fix kerning 3.alpha.0.13e 01/02/95 by Dieter Bayer Fixed bounding box problem with clipped planes Changed MAX_INTERSECTIONS to MAX_FOG_HITS in ATMOSPH.C 3.alpha.0.13d 12/94 by Eduard Schwan Changes to Mosaic preview 3.alpha.0.13c 12/22/94 by Dieter Bayer changed type BLOBTYPE to type int in BLOB.C function headers. 3.alpha.0.13b 12/94 by Chris Young Changes for static/global stuff accidently left out of 13. 3.alpha.0.13a 12/21/94 by Dieter Bayer removed unneeded variable cd1 from BOUND.C removed unneeded function declaration from PARSE.C fixed some bugs in JULIA.C fixed bug in BLOB.C changed maximum blob component size to 65000. Storage data type is defined now to make it easy to change (currently unsigned short) made some minor changes to the options layout in OPTIONS.C 3.alpha.0.13 12/19/94 by Chris Young About a gazillion functions and variables made static and other changes suggested by Clint. Patches for fussy Unix compilers by Steve Demlow Sync up of all 3.0.12 patches 3.alpha.0.12h-k 12/18/94 by Dieter Bayer changed max. number of blob component to 65000 (values are now stored in unsigned shorts to save memory) added credit screen (has to be updated). added quaternion julia object by Paul Massinimo. New files JULIA.C & JULIA.H added Steve Anger's patch to fix infinite loop in POV_RECLLOC() added initializations to expressions in EXPRESS.C fixed memory leakages in BLOB.C, PARSE.C, POLYGON.C, VBUFFER.C fixed output buffer size bug (negativ buffer size if buffer was > INT_MAX byte) fixed default filename bug in POVRAY.C. It wasn't displayed (e.g. data.tga) changed max. index value (has to be smaller than 1) in Rainbow() and Skyblend() to suit Compute_Pigment() changed usage screen changed options screen changed call to Build_Bounding_Slabs() to always print number of objects changed blob component limit to MAX_INT changed 'int register' to 'register int' in EXPRESS.C moved usage, option, and stats stuff into OPTIONS.C/OPTIONS.H moved grid stuff from GRIDS.H into RENDER.C (delete GRIDS.H!) removed some declared but unused variables removed all unnecessary MATRIX referencing in function parameters. (vectors and arrays are always passed by reference so referencing isn't necessary.) removed unnecessary 'External variables' section from .c files (external variables are included via include files) 3.alpha.0.12g by Chris Young Split PARSE.C into PARSE.C & PARSTXTR.C. Added also PARSTXTR.H Misc static changes, bug fixes 3.alpha.0.12f 12/10/94 by Eduard Schwan Misc bug fixes in MEMIO.C, FRAME.H, TTF.C necessary for Mac. 3.alpha.0.12e 12/12/94 by Dieter Bayer Changed blob component maximum (=30000) Changed blob intersection list (now dynamically allocated) Changed command line option +UR to +UD and +UU to +UR. Changed calls to Fog() and Rainbow(). They are no longer called from Determine_Apparent_Colour(). They are only called from Trace() and Trace_Primary_Ray(). Changed depth threshold for superquadric ellipsoids. Fixed roughness=0 bugs in PARSE.C. 3.alpha.0.12a thru d 12/09/94 by Chris Young Implemented normal_map for all normals. normal_map { [0.0 NORMAL_BODY] .... [N.N NORMAL_BODY] } Implemented slope_map for pattern-based normals. slope_map { [0.0 <HEIGHT,SLOPE>] .... [N.N <HEIGHT,SLOPE>] } Changed scale on scallop_wave to match other wave types. TTF bug fixes and split characters into individual objects so that autobounding works. Added exit code parameter to FINISH_POVRAY(n). Now FINISH_POVRAY(n) should call exit(n); Several incarnations of quilted taken in/out. Final version uses Dan's normal and CY's pigment. Numerous bug-fixes by Eduard and Dieter. Total rewrite of how pattern-based normals work. New method fixes bad design flaw but produces slightly different results. At least it works consistently and efficently. 3.alpha.0.12 11/19/94 by Chris Young Superelipsoids added by Dieter & Xander (new SUPER.C & SUPER.H) Major rewite of color_map code to allow pigment_map and to pave the way for normal_map, slope_map, & texture_map Implemented pigment map for all except image_map Rewrite of quilted pigment & normal Proportional spacing for TTF added by Xander Cylindrical camera models by Dieter Included IBM.OLD & CONFIG.OLD for compilers that aren't yet ported Fixed bug in mosaic preview by Eduard 3.alpha.0.11 11/01/94 by Dieter Bayer Added improved bounding hierarchy creation to BLOB.C. Added initialization of light list in LIGTHING.C. Added test for focal blur to VBUFFER.C. Added test for 'once' images in Test_Opacicty() (fixes POV3BUG.POV bug). Added code to ibm.c that uses gotoxy(1,24) instead of gotoxy(1,15) in IBM_Finish() if compiled for DJGPP to avoid segmentation violation. Changed polygon data structure (saves memory for copied polygons). Removed unnecessary workaround for POV_REALLOC() in CSG.C. Removed unnecessary 'Inverted' element from TTF structure. Removed 'Rewritten and ...' lines from function headers. Removed single '/* [DB ?/94] */' comments. 3.alpha.0.10 10/30/94 by Chris Young Misc lbuffer & vbuffer fixes by Dieter Misc memio fixes by Steve anger Major rewrite of pigment & normal code by CY Added PATTERN.C & PATTERN.H Moved many routines and rewrote parameter lists. Added normal{...} types agate, bozo, brick, checker, crackle, gradient, granite, hexagon, leopard, mandel, marble, onion, radial, spiral1, spiral2, spotted & wood. Note syntax for normal is that bump amount is always last. i.e. normal {gradient <DIRECTION>, AMOUNT ...} normal {mandel ITERATIONS, AMOUNT ...} Modified syntax for spiral1 and spiral2 such that keyword must be followed by float value specifying number of arms. Previously octaves was used. i.e. pigment{spiral1 5} Added wave type keywords for most pattern based pigments and normals ramp_wave, triangle_wave, sine_wave, scallop_wave Note in 3.alpha.0.9 VECT.C was renamed MATH.C & MATH.H but this caused conflicts with <math.h> system file. Now renamed it to POLYSOLV.C & POLYSOLV.H. Moved some macros from MATH.H to FRAME.H. Note only the Borland & DJGCC make files are current. Dependancy info in IBMGCC.MAK may be wrong. 3.alpha.0.9 09/28/94 by Dieter Bayer Added transformations to blob components (translation, scaling, rotation). Added multi-textured blob support. Added optional strength keyword to new blob component syntax. Added no_hierarchy keyword to blobs to avoid the creation of an internal bounding sphere hierarchy. Added improved color calculation for metallic surfaces. Added vista buffer (+uv option, +upxx option for descending method). Added light buffer (+ul option, +upxx option for descending method). Added drawing of vista rectangles; kind of a preview (+ur option). Added splitting of bounded unions with finite children (+su option). Added code to resize priority queue in BOUND.C to avoid queue overflows. Added code to allocate/free priority code outside Bounds_Intersect(). Added code to BOUND.C that puts all infinite objects in the first node of the bounding hierarchy root. Thus the hierarchy won't "mess up". Added infinite flag to objects to avoid testing the bounding slab of infinite objects during bounding hierarchy traversal. This saves time because the bounding box of an infinite object will always be hit. Added code to Parse_Object_Mods() to calculate the bounding box of any bounding or clipping objects and to assign the smaller one to the object if the object's bounding box is larger. Added code to Parse_Camera() to make sure that camera vectors are perpendicular to each other. That is a must for the vista buffer. Added code to Intersect_Box() to determine which side is hit in those cases where intersecion points are close to each other. This fixes surface acne problems at the edges of a box due to the usage of the wrong surface normal (see CHARS.POV e.g). Modified BOUND.C to work with vista/light buffer. Fixed memory leaks in DISCS.C, LATHE.C, PRISM.C, SOR.C, and TORUS.C. Fixed threshold problem in normal calculation of cones/cylinders. Created missing .h files for most .c files. Lots of code "clean-ups" and re-formatting. 3.alpha.0.8 09/22/94 by CEY From Steve Anger: Memory management parts of MEMIO.C See comments in MEMIO.C for details. From Chris Young: Split "Information" printf function into 3 new functions "Render_Info", "Status_Info" and "Debug_Info". All printf to stdout or stderr now converted to new i/o functions such as Render_Info, etc. All exit() calls re-directed through "Error". Fixed +ER +EC bug reported by DMF. Fixed TRUETYPE.C MAC macro by Eduard. Major rewrite of all aspects of IBM.C including text and video. Text changes are work-in-progress. Requires CONIO.H macros a la Borland. Video requires Kendall's PMODE.LIB for all compilers. Note DJGCC is unsupported but has been faked with compatible macros. VESA.C no longer required. TIGA support deleted. Targa_Plus code needs rewritten but is stubbed out. Misc bug fixes. 3.alpha.0.7 08/31/94 by CEY The following items from Dieter - memory leackage in BLOB.C fixed (bounding hierarchy is deleted now) - 'CROSSBLOB' bug fixed - fillite light source bug fixed (as mentioned by Dan Farmer) - 'toroids in CSG' bug fixed (larger tolerance in Inside_Poly()) - name Polygon changed to Polyg in POLYGON.C/POLYGON.H. - Only one function is now used to solve a polynomial c[0] * x^n + c[1] * x^(n-1) + ... + c[n-1] * x + c[n] = 0. Solve_Polynomial(n, c, r, sturm, epsilon) n - order of polynomial c - coefficients r - roots found sturm - use sturmian root solver (TRUE) epsilon - root elimination tolerance, i.e. roots with |x| < epsilon will be eliminated (epsilon = 0 means that no roots will be eliminated) From Eduard the mosaic preview. Uses +SPnn +SEnn Requires new display_plot_rectangle in MACHINE.C Does not do file output. From CEY: Misc bug fixes from various sources. More work-in-progress on error messages etc. 3.alpha.0.6 08/19/94 by Dieter Bayer Added new camera models and camera ray pertubation. Added lathe primitve. Added polygon primitive. Added prism primitive. Added surface of revolution primitive. Added "rainbow" and "skyblend" (ATMOSPH.C). Added cylindrical blobs and blob bounding hierarchy. Added improved torus primitive (faster intersection testing) Added two spiral textures. Added Compute_???_BBox() to all objects. Added function Solve_Polynomial_With_Root_Elimination() to VECT.C that uses order reduction to eliminate roots at 0 (helps avoiding "surface acne"). Added function Solve_Polynomial() to VECT.C to easily solve a polynomial of order n (sturm can be specified). Added code for tighter bounding boxes of CSG intersections. Added cache for shadow testing to avoid repeated tests with layered textures. Added test for opaque objects that speed up Filter_Shadow_Ray(). Added 4x4-matrix inversion to MATRICES.C. Added new vector macros (see VECTOR.H). Added #defines to .H files so that they are just processed once if they get included more than once. Added memory clean-up to HFIELD.C. Fixed iridescence bug due to uninitialized values in Create_Finish(). Fixed bug in sbisect() in VECT.C. Fixed camera bug (ray direction parallel to y-axis). Fixed "trace level bug". Now the correct maximum level traced is shown. Fixed memory leakage bug in Free_Noise_Tables(). Fixed problems with CSG and declared height fields (most probably). Fixed bug in Where_Error(). Moved Add_Pigment() from LIGHTING.C to PIGMENT.C and made all pigment functions static. Moved Perturb_Normal() from LIGHTING.C to NORMAL.C and made all normal perturbing functions static. Moved all fog functions to ATMOSPH.C and "merged" them into one function. Changed POV 2.x difficult_coeffs() in VECT.C to version from POV 1.0 to solve problems with vanishing objects (new version is still there). Problems with surface acne should be solved by root elimination. Changed normal functions so that a pointer to the intersection structure is passed instead of the intersection point (more flexible). Changed normal calculation of boxes. It now uses information on the side hit by the ray that was derived during intersection testing. Changed some global functions to static. Changed height field intersection testing to use only one function for CSG and non-CSG height fields. Changed disc functions to get tighter bounds and to increase speed. Changed normal calculation of smooth triangles to increase speed. Renamed varibales min and sec to minutes and seconds in POVRAY.C. Removed unused global variable Shadow_Test_Flag. "Clean-up" of most primitive related files (cosmetic changes, added comments, small speed-ups). Compressed Targa now supported via +FC switch. 3.alpha.0.5 08/08/94 Fixed vrotate bug. Added Dan Farmer's focal blur Added Dan Farmer's quilted normal pattern Fixed truetype problems. Note .TTF file must be in current directory. Cannot find TTF on +L paths. New error message dumps lines on parse errors. Relational operators < <= != = >= > added. Note relational expressions must be enclosed in parens. Logical operators & | ! added. Conditional expressions (c)?a:b added. 3.alpha.0.4 07/16/94 Added Dieter's patches to remove various cache values. Added Dieter's patches to combine object flags into bit flags. Began outlining new message output functions in new MEMIO.C Converted Xander's TRUETYPE.C to 3.x. It doen't work yet. Deleted TIGA support from Borland version. 3.alpha.0.3 06/27/94 Fixed typo in VSumSqr macro in VECTOR.H affecting crackle Fixed uninitalized Background_Colour in PARSE.C Fixed 0.0 constant in Warn in PARSE.C Fixed STAT.OUT that got stuck "on" Added Automatic Depth Control (ADC) from Dan Farmer Added fill lights, number of waves, fisheye, new fog types, and brick pigment from Dan Farmer Added first round rewrite of expression parser. Includes the following functions: These return float values... abs(A) absolute values of A atan2(X,Y) arc-tangent in radians of (X/Y) ceil(A) round up to next integer value A clock value of +K switch cos(A) cosine of A where A is in radians degrees(A) convert A from radians to degrees div(A,B) integer part of (A/B) exp(A) e-to-the A power int(A) integer part of A log(A) base e logarithm of A max(A,B) maximum of A and B min(A,B) minimum of A and B mod(A,B) A modulo B, the remainder of A/B pi constant 3.3.1415926535897932384626 pow(A,B) raise A to the B power radians(A) convert A from degrees to radians sqrt(A) square root of A vdot(V1,V2) dot product of vectors V1 and V2 vlength(V1) length of vector V1 version value of version variable These return vector values... vaxis_rotate(V1,V2,D) rotate point V1 by D degrees about any arbitrary axis V2 (not just coordinate axes) vcross(V1,V2) cross product of V1 X V2 vnormalize(V) scale V to unit length vrotate(V1,V2) rotate point V1 about coordinate axes by V2 amount of degrees. For example: vrotate(V1,30*y) rotates V1 by 30 degrees about y-axis. x, y, z constant unit vectors Added expression parsing to colors: White*0.536-Red*0.1 Made "color" keyword optional everywhere except old style color maps. 3.alpha.0.2 06/02/94 Added Steve Anger's memory cleanups. Added crackle pigment but it contains a negative sqrt bug. Added modified version of Dan Farmer's irid code. irid {FLOAT [thickness FLOAT] [turbulence FLOAT] } Other irid options to be added later. Fixed Antialias_Threshold bug from 3a.0.1 Changed several .INI variables so the only set defaults but do not turn options on. Changed variable name in GIFDECOD.C per Eduard's request. Fixed spelling of sturm in PARSE.C error message. 3.alpha.0.1 04/28/94 Implemented .INI file parsing system. Works with switches and .DEF files too. Eliminated case sensitivity option in TOKENIZE.C Eliminated +T case sensitive switch. Eliminated sub-options of +V switch (needs more work). Changed when +SR, +SC, +ER, +EC take effect when using fractional values. For example: +W320 +SR0.1 +W640 used to result in +SR32 now late binding results in +SR64. Order of specifing switches no longer hurts. Now +B0 or -B0 turns off any previous +Bnnn setting. Formerly any +B setting could not be overridden once set. Now it can be. 3.alpha.0.0 04/06/94 Initial 3.0 version converted all VECTOR & COLOUR structs to arrays. Added +Xnnn command-line switch to only check for keypress every nnn pixels.