home *** CD-ROM | disk | FTP | other *** search
Text File | 1994-07-26 | 2.9 KB | 59 lines | [TEXT/ttxt] |
- What: "virtual" flying through the clouds
- Hot points:
- - simple virtual reality "thing"
- - with the source
- - very detailed explanation as to how to generate clouds and
- render maps in 3D.
- - includes the source for a small class library to handle color
- Mac windows and draw images in off-screen GrafWorlds
- Contents:
- Readme - this file
- Venus - Application itself
- Venus.pi - project and resource files to build it
- Venus.pi.rsrc - 'clut' resource
- FractalMap.cc - generate a fractal map (clouds)
- project_3D.cc - display a 3D moving projection of the map of clouds
- display.cc - display an image in a Mac window
- window.h \ my own private very simple MacApp: classlib for
- SimpleWindow.cc / handling color Mac windows and offscreen GrafWorlds
- The source code contains (too) many comments to show what
- a particular piece of code does, as well as some tricks involved
- Language: Symantec C++ 7.0.3 (previous versions might work, too)
- System: System 7.x; tested on IIci, Quadras and Centres.
- Note: the source code uses a "standard" environment, see myenv-notify.cpt,
- which can be found at various archive sites under the name
- 'myenv-notify'. The source also uses graylib class library to
- handle images, recently posted on comp.source.misc. However,
- the library is not *very* used; one can easily get around without
- it with only small modification of the code.
- Comments-to: oleg@ponder.csci.unt.edu, oleg@unt.edu
- Many-Thanks-To: Tim Clarke, tjc1005@hermes.cam.ac.uk (for inspiration)
-
- Explanation:
-
- Just fire it up, sit back and enjoy. Hope you'll get some
- feeling that you're hovering over or flying through the clouds. If you
- quit the program and start it over again, you'll get different clouds
- (which might be much better and more interesting to fly around).
-
- If you want to take on a more active role, hold the mouse
- button down and move the mouse. Then your flight is in your own hand
- (which holds the mouse). You have to keep the mouse button down all
- the time you want to control the situation: when mouse button is up,
- the system flies by itself. You can also use the keyboard: arrows
- left/right/up/down move you around, PgUp/PgDn changes your altitude
- (or height of the horizon if pressed with "Option"); all other keys
- quietly kill the program (you can also quit by clicking the close box
- of the window).
-
- This program is inspired by MARS.EXE and its description
- posted in rec.games.programmer. There, the author of Mars, Tim Clarke,
- explained its guts, though he didn't give detailed equations and there
- were a few typos in his post. Source file project_3D.cc in the
- present submission contains the fullest description (I could come up
- with) of the 3D rendering technique: with background, equations,
- pseudocode and the actual code (and tricks with the fixed-point
- arithmetics: hey, no floating-point numbers are in here).
-
- If you need further information or details, mail me.
-