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- /****************************************************************************
- * texture.c
- *
- * This module implements texturing functions such as noise, turbulence and
- * texture transformation functions. The actual texture routines are in the
- * files pigment.c & normal.c.
- * The noise function used here is the one described by Ken Perlin in
- * "Hypertexture", SIGGRAPH '89 Conference Proceedings page 253.
- *
- * from Persistence of Vision Raytracer
- * Copyright 1993 Persistence of Vision Team
- *---------------------------------------------------------------------------
- * NOTICE: This source code file is provided so that users may experiment
- * with enhancements to POV-Ray and to port the software to platforms other
- * than those supported by the POV-Ray Team. There are strict rules under
- * which you are permitted to use this file. The rules are in the file
- * named POVLEGAL.DOC which should be distributed with this file. If
- * POVLEGAL.DOC is not available or for more info please contact the POV-Ray
- * Team Coordinator by leaving a message in CompuServe's Graphics Developer's
- * Forum. The latest version of POV-Ray may be found there as well.
- *
- * This program is based on the popular DKB raytracer version 2.12.
- * DKBTrace was originally written by David K. Buck.
- * DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
- *
- *****************************************************************************/
-
- /*
- Some texture ideas garnered from SIGGRAPH '85 Volume 19 Number 3,
- "An Image Synthesizer" By Ken Perlin.
- Further Ideas Garnered from "The RenderMan Companion" (Addison Wesley)
- */
-
- #include "frame.h"
- #include "vector.h"
- #include "povproto.h"
- #include "texture.h"
-
- DBL *sintab;
- DBL frequency[NUMBER_OF_WAVES];
- VECTOR Wave_Sources[NUMBER_OF_WAVES];
- DBL *RTable;
- short *hashTable;
-
- unsigned short crctab[256] =
- {
- 0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241,
- 0xc601, 0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440,
- 0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40,
- 0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841,
- 0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40,
- 0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41,
- 0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641,
- 0xd201, 0x12c0, 0x1380, 0xd341, 0x1100, 0xd1c1, 0xd081, 0x1040,
- 0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240,
- 0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441,
- 0x3c00, 0xfcc1, 0xfd81, 0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41,
- 0xfa01, 0x3ac0, 0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840,
- 0x2800, 0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41,
- 0xee01, 0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40,
- 0xe401, 0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640,
- 0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041,
- 0xa001, 0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240,
- 0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441,
- 0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41,
- 0xaa01, 0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840,
- 0x7800, 0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41,
- 0xbe01, 0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40,
- 0xb401, 0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640,
- 0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041,
- 0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241,
- 0x9601, 0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440,
- 0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40,
- 0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841,
- 0x8801, 0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40,
- 0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41,
- 0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641,
- 0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040
- };
-
- void Compute_Colour (Colour, Pigment, value)
- COLOUR *Colour;
- PIGMENT *Pigment;
- DBL value;
- {
- COLOUR_MAP *Colour_Map = Pigment->Colour_Map;
- int max_colors = Colour_Map->Number_Of_Entries-1;
- COLOUR_MAP_ENTRY *Cur, *Prev;
- register DBL fraction;
-
- value = fmod(value * Pigment->Frequency + Pigment->Phase,1.00001);
- if (value < 0.0) /* allow negative Frequency */
- value -=floor(value);
-
- /* if greater than last, use last. */
- if (value >= Colour_Map->Colour_Map_Entries[max_colors].value)
- {
- *Colour = Colour_Map->Colour_Map_Entries[max_colors].Colour;
- return;
- }
-
- Prev = Cur = &(Colour_Map->Colour_Map_Entries[0]);
- while (value >= Cur->value)
- Prev = Cur++;
-
- /* if stopped on first entry, use first. */
- if (Prev == Cur)
- {
- *Colour = Cur->Colour;
- return;
- }
-
- fraction = (value - Prev->value) / (Cur->value - Prev->value);
- Colour->Red = Prev->Colour.Red + fraction * (Cur->Colour.Red - Prev->Colour.Red);
- Colour->Green = Prev->Colour.Green + fraction * (Cur->Colour.Green - Prev->Colour.Green);
- Colour->Blue = Prev->Colour.Blue + fraction * (Cur->Colour.Blue - Prev->Colour.Blue);
- Colour->Filter = Prev->Colour.Filter + fraction * (Cur->Colour.Filter - Prev->Colour.Filter);
-
- return;
- }
-
- void Initialize_Noise ()
- {
- register int i = 0;
- VECTOR point;
-
- InitRTable();
-
- if ((sintab = (DBL *)malloc(SINTABSIZE * sizeof(DBL))) == NULL)
- MAError ("sine table");
-
- for (i = 0 ; i < SINTABSIZE ; i++)
- sintab[i] = sin(i/(DBL)SINTABSIZE * (3.14159265359 * 2.0));
-
- for (i = 0 ; i < NUMBER_OF_WAVES ; i++)
- {
- DNoise (&point, (DBL) i, 0.0, 0.0);
- VNormalize (Wave_Sources[i], point);
- frequency[i] = (rand() & RNDMASK) / RNDDIVISOR + 0.01;
- }
- }
-
- void InitTextureTable()
- {
- int i, j, temp;
-
- srand(0);
-
- if ((hashTable = (short int *) malloc(4096*sizeof(short int))) == NULL)
- MAError ("hash table");
-
- for (i = 0; i < 4096; i++)
- hashTable[i] = i;
- for (i = 4095; i >= 0; i--)
- {
- j = rand() % 4096;
- temp = hashTable[i];
- hashTable[i] = hashTable[j];
- hashTable[j] = temp;
- }
- }
-
- /* modified by AAC to work properly with little bitty integers (16 bits) */
-
- void InitRTable()
- {
- int i;
- VECTOR rp;
-
- InitTextureTable();
-
- if ((RTable = (DBL *)malloc(MAXSIZE * sizeof(DBL))) == NULL)
- MAError ("RTable");
-
- for (i = 0; i < MAXSIZE; i++)
- {
- rp.x = rp.y = rp.z = (DBL)i;
- RTable[i] = (unsigned int) R(&rp) * REALSCALE - 1.0;
- }
- }
-
- int R(v)
- VECTOR *v;
- {
- v->x *= .12345;
- v->y *= .12345;
- v->z *= .12345;
-
- return (Crc16((char *) v, sizeof(VECTOR)));
- }
-
- /*
- * Note that passing a VECTOR array to Crc16 and interpreting it as
- * an array of chars means that machines with different floating-point
- * representation schemes will evaluate Noise(point) differently.
- */
-
- int Crc16(buf, count)
- register char *buf;
- register int count;
- {
- register unsigned short crc = 0;
-
- while (count--)
- crc = (crc >> 8) ^ crctab[ (unsigned char) (crc ^ *buf++) ];
-
- return ((int) crc);
- }
-
-
- /*
- Robert's Skinner's Perlin-style "Noise" function - modified by AAC
- to ensure uniformly distributed clamped values between 0 and 1.0...
- */
-
-
- DBL Noise(x, y, z)
- DBL x, y, z;
- {
- DBL *mp;
- long ix, iy, iz, jx, jy, jz;
- int ixiy_hash, ixjy_hash, jxiy_hash, jxjy_hash;
-
- DBL sx, sy, sz, tx, ty, tz;
- DBL sum;
-
- DBL x_ix, x_jx, y_iy, y_jy, z_iz, z_jz, txty, sxty, txsy, sxsy;
-
- Calls_To_Noise++;
-
- /*setup_lattice(&x, &y, &z, &ix, &iy, &iz, &jx, &jy, &jz, &sx, &sy, &sz, &tx, &ty, &tz);*/
- x -= MINX;
- y -= MINY;
- z -= MINZ;
-
- /* its equivalent integer lattice point. */
- ix = (long)x; iy = (long)y; iz = (long)z;
- jx = ix + 1; jy = iy + 1; jz = iz + 1;
-
- sx = SCURVE(x - ix); sy = SCURVE(y - iy); sz = SCURVE(z - iz);
-
- /* the complement values of sx,sy,sz */
- tx = 1.0 - sx; ty = 1.0 - sy; tz = 1.0 - sz;
-
- /*
- * interpolate!
- */
- x_ix = x - ix;
- x_jx = x - jx;
- y_iy = y - iy;
- y_jy = y - jy;
- z_iz = z - iz;
- z_jz = z - jz;
- txty = tx * ty;
- sxty = sx * ty;
- txsy = tx * sy;
- sxsy = sx * sy;
- ixiy_hash = Hash2d ( ix, iy );
- jxiy_hash = Hash2d ( jx, iy );
- ixjy_hash = Hash2d ( ix, jy );
- jxjy_hash = Hash2d ( jx, jy );
-
- mp = &RTable[(int) Hash1d(ixiy_hash, iz ) & 0xFF];
- sum = INCRSUMP(mp,(txty*tz), x_ix, y_iy, z_iz);
-
- mp = &RTable[(int) Hash1d( jxiy_hash, iz ) & 0xFF];
- sum += INCRSUMP(mp,(sxty*tz), x_jx, y_iy, z_iz);
-
- mp = &RTable[(int) Hash1d( ixjy_hash, iz ) & 0xFF];
- sum += INCRSUMP(mp,(txsy*tz), x_ix, y_jy, z_iz);
-
- mp = &RTable[(int) Hash1d( jxjy_hash, iz ) & 0xFF];
- sum += INCRSUMP(mp,(sxsy*tz), x_jx, y_jy, z_iz);
-
- mp = &RTable[(int) Hash1d( ixiy_hash, jz ) & 0xFF];
- sum += INCRSUMP(mp,(txty*sz), x_ix, y_iy, z_jz);
-
- mp = &RTable[(int) Hash1d( jxiy_hash, jz ) & 0xFF];
- sum += INCRSUMP(mp,(sxty*sz), x_jx, y_iy, z_jz);
-
- mp = &RTable[(int) Hash1d( ixjy_hash, jz ) & 0xFF];
- sum += INCRSUMP(mp,(txsy*sz), x_ix, y_jy, z_jz);
-
- mp = &RTable[(int) Hash1d( jxjy_hash, jz ) & 0xFF];
- sum += INCRSUMP(mp,(sxsy*sz), x_jx, y_jy, z_jz);
-
- sum = sum + 0.5; /* range at this point -0.5 - 0.5... */
-
- if (sum < 0.0)
- sum = 0.0;
- if (sum > 1.0)
- sum = 1.0;
-
- return (sum);
- }
-
-
- /*
- Vector-valued version of "Noise"
- */
-
- void DNoise(result, x, y, z)
- VECTOR *result;
- DBL x, y, z;
- {
- DBL *mp;
- long ix, iy, iz, jx, jy, jz;
- int ixiy_hash, ixjy_hash, jxiy_hash, jxjy_hash;
- DBL px, py, pz, s;
- DBL sx, sy, sz, tx, ty, tz;
- DBL txty, sxty, txsy, sxsy;
-
- Calls_To_DNoise++;
-
- /*setup_lattice(&x, &y, &z, &ix, &iy, &iz, &jx, &jy, &jz, &sx, &sy, &sz, &tx, &ty, &tz);*/
- x -= MINX;
- y -= MINY;
- z -= MINZ;
-
- /* its equivalent integer lattice point. */
- ix = (long)x; iy = (long)y; iz = (long)z;
- jx = ix + 1; jy = iy + 1; jz = iz + 1;
-
- sx = SCURVE(x - ix); sy = SCURVE(y - iy); sz = SCURVE(z - iz);
-
- /* the complement values of sx,sy,sz */
- tx = 1.0 - sx; ty = 1.0 - sy; tz = 1.0 - sz;
-
- /*
- * interpolate!
- */
- txty = tx * ty;
- sxty = sx * ty;
- txsy = tx * sy;
- sxsy = sx * sy;
- ixiy_hash = Hash2d ( ix, iy );
- jxiy_hash = Hash2d ( jx, iy );
- ixjy_hash = Hash2d ( ix, jy );
- jxjy_hash = Hash2d ( jx, jy );
-
- mp = &RTable[(int) Hash1d( ixiy_hash, iz ) & 0xFF];
- px = x-ix; py = y-iy; pz = z-iz;
- s = txty*tz;
- result->x = INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->y = INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->z = INCRSUMP(mp,s,px,py,pz);
-
- mp = &RTable[(int) Hash1d( jxiy_hash, iz ) & 0xFF];
- px = x-jx;
- s = sxty*tz;
- result->x += INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->y += INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->z += INCRSUMP(mp,s,px,py,pz);
-
- mp = &RTable[(int) Hash1d( jxjy_hash, iz ) & 0xFF];
- py = y-jy;
- s = sxsy*tz;
- result->x += INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->y += INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->z += INCRSUMP(mp,s,px,py,pz);
-
- mp = &RTable[(int) Hash1d( ixjy_hash, iz ) & 0xFF];
- px = x-ix;
- s = txsy*tz;
- result->x += INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->y += INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->z += INCRSUMP(mp,s,px,py,pz);
-
- mp = &RTable[(int) Hash1d( ixjy_hash, jz ) & 0xFF];
- pz = z-jz;
- s = txsy*sz;
- result->x += INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->y += INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->z += INCRSUMP(mp,s,px,py,pz);
-
- mp = &RTable[(int) Hash1d( jxjy_hash, jz ) & 0xFF];
- px = x-jx;
- s = sxsy*sz;
- result->x += INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->y += INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->z += INCRSUMP(mp,s,px,py,pz);
-
- mp = &RTable[(int) Hash1d( jxiy_hash, jz ) & 0xFF];
- py = y-iy;
- s = sxty*sz;
- result->x += INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->y += INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->z += INCRSUMP(mp,s,px,py,pz);
-
- mp = &RTable[(int) Hash1d( ixiy_hash, jz ) & 0xFF];
- px = x-ix;
- s = txty*sz;
- result->x += INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->y += INCRSUMP(mp,s,px,py,pz);
- mp += 4;
- result->z += INCRSUMP(mp,s,px,py,pz);
- }
-
- DBL Turbulence (x, y, z, omega, lambda, octaves)
- DBL x, y, z,omega, lambda;
- int octaves;
- {
- int i;
- DBL l, o, value, tempx, tempy, tempz;
-
- value = Noise(x, y, z);
- l = lambda;
- o = omega;
- for (i = 2; i <= octaves; i++)
- {
- tempx = l * x;
- tempy = l * y;
- tempz = l * z;
- value += o * Noise(tempx, tempy, tempz);
- if (i < octaves)
- {
- l *= lambda;
- o *= omega;
- }
- }
- return (value);
- }
-
- void DTurbulence (result, x, y, z, omega, lambda, octaves)
- VECTOR *result;
- DBL x, y, z, omega, lambda;
- int octaves;
- {
- int i;
- DBL l, o;
- VECTOR value, temp;
-
- result -> x = 0.0;
- result -> y = 0.0;
- result -> z = 0.0;
-
- value.x = value.y = value.z = 0.0;
-
- DNoise(result, x,y,z);
-
- l = lambda;
- o = omega;
- for (i = 2; i <= octaves; i++)
- {
- temp.x = l * x;
- temp.y = l * y;
- temp.z = l * z;
-
- DNoise(&value, temp.x, temp.y, temp.z);
- result->x += o * value.x;
- result->y += o * value.y;
- result->z += o * value.z;
- if (i < octaves)
- {
- l *= lambda;
- o *= omega;
- }
- }
- }
-
- DBL cycloidal (value)
- DBL value;
- {
- register int indx;
-
- if (value >= 0.0)
- {
- indx = (int)((value - floor (value)) * SINTABSIZE);
- return (sintab [indx]);
- }
- else
- {
- indx = (int)((0.0 - (value + floor (0.0 - value))) * SINTABSIZE);
- return (0.0 - sintab [indx]);
- }
- }
-
- DBL Triangle_Wave (value)
- DBL value;
- {
- register DBL offset,temp1;
-
- if (value >= 0.0) offset = value - floor(value);
- else
- {
- temp1 = -1.0 - floor(fabs(value));
- offset = value - temp1;
- }
- if (offset >= 0.5) return (2.0 * (1.0 - offset));
- else return (2.0 * offset);
- }
-
- void Translate_Textures (Textures, Vector)
- TEXTURE *Textures;
- VECTOR *Vector;
- {
- TRANSFORM Trans;
-
- Compute_Translation_Transform (&Trans, Vector);
- Transform_Textures (Textures, &Trans);
- }
-
- void Rotate_Textures (Textures, Vector)
- TEXTURE *Textures;
- VECTOR *Vector;
- {
- TRANSFORM Trans;
-
- Compute_Rotation_Transform (&Trans, Vector);
- Transform_Textures (Textures, &Trans);
- }
-
- void Scale_Textures (Textures, Vector)
- TEXTURE *Textures;
- VECTOR *Vector;
- {
- TRANSFORM Trans;
-
- Compute_Scaling_Transform (&Trans, Vector);
- Transform_Textures (Textures, &Trans);
- }
-
- void Transform_Textures (Textures, Trans)
- TEXTURE *Textures;
- TRANSFORM *Trans;
- {
- TEXTURE *Layer, *Material;
-
- for (Layer = Textures;
- Layer != NULL;
- Layer = Layer->Next_Layer)
- switch (Layer->Type)
- {
- case PNF_TEXTURE:
- Transform_Pigment (Layer->Pigment, Trans);
- Transform_Tnormal (Layer->Tnormal, Trans);
- break;
-
- case TILE_TEXTURE:
- if (((TILES *)Layer)->Trans == NULL)
- ((TILES *)Layer)->Trans = Create_Transform ();
- Compose_Transforms (((TILES *)Layer)->Trans, Trans);
- Transform_Textures (((TILES *)Layer)->Tile1, Trans);
- Transform_Textures (((TILES *)Layer)->Tile2, Trans);
- break;
-
- case MAT_TEXTURE:
- if (((MATERIAL *)Layer)->Trans == NULL)
- ((MATERIAL *)Layer)->Trans = Create_Transform ();
- Compose_Transforms (((MATERIAL *)Layer)->Trans, Trans);
- for (Material = ((MATERIAL *)Layer)->Materials;
- Material != NULL;
- Material = Material->Next_Material)
- Transform_Textures (Material, Trans);
- break;
- }
- }
-
- FINISH *Create_Finish ()
- {
- FINISH *New;
-
- if ((New = (FINISH *) malloc (sizeof (FINISH))) == NULL)
- MAError ("finish");
-
- New->Reflection = 0.0;
- New->Ambient = 0.1;
- New->Diffuse = 0.6;
- New->Brilliance = 1.0;
- New->Index_Of_Refraction = 1.0;
- New->Refraction = 0.0;
- New->Specular = 0.0;
- New->Roughness = 1.0/0.05; /* CEY 12/92 */
- New->Phong = 0.0;
- New->Phong_Size = 40.0;
- New->Crand = 0.0;
- New->Metallic_Flag = FALSE;
-
- return (New);
- }
-
- FINISH *Copy_Finish (Old)
- FINISH *Old;
- {
- FINISH *New;
-
- if (Old != NULL)
- {
- New = Create_Finish ();
- *New = *Old;
- }
- else
- New = NULL;
- return (New);
- }
-
- TEXTURE *Create_PNF_Texture ()
- {
- TEXTURE *New;
-
- if ((New = (TEXTURE *) malloc (sizeof (TEXTURE))) == NULL)
- MAError ("texture");
-
- New->Type = PNF_TEXTURE;
- New->Flags = NO_FLAGS;
- New->Pigment = NULL;
- New->Tnormal = NULL;
- New->Finish = NULL;
- New->Next_Layer = NULL;
- New->Next_Material = NULL;
-
- return (New);
- }
-
- TILES *Create_Tiles_Texture ()
- {
- TILES *New;
-
- if ((New = (TILES *) malloc (sizeof (TILES))) == NULL)
- MAError ("checker texture");
-
- New->Type = TILE_TEXTURE;
- New->Flags = NO_FLAGS;
- New->Tile1 = NULL;
- New->Tile2 = NULL;
- New->Trans = NULL;
- New->Next_Layer = NULL;
- New->Next_Material = NULL;
-
- return (New);
- }
-
- MATERIAL *Create_Material_Texture ()
- {
- MATERIAL *New;
-
- if ((New = (MATERIAL *) malloc (sizeof (MATERIAL))) == NULL)
- MAError ("material texture");
-
- New->Type = MAT_TEXTURE;
- New->Flags = NO_FLAGS;
- New->Materials = NULL;
- New->Num_Of_Mats = 0;
- New->Trans = NULL;
- New->Next_Layer = NULL;
- New->Next_Material = NULL;
-
- return (New);
- }
-
- TEXTURE *Copy_Textures (Textures)
- TEXTURE *Textures;
- {
- TEXTURE *New, *First, *Previous, *Layer;
-
- Previous = First = NULL;
-
- for (Layer = Textures;
- Layer != NULL;
- Layer = Layer->Next_Layer)
- {
- switch (Layer->Type)
- {
- case PNF_TEXTURE:
- New = Create_PNF_Texture ();
- New->Pigment = Copy_Pigment (Layer->Pigment);
- New->Tnormal = Copy_Tnormal (Layer->Tnormal);
- New->Finish = Copy_Finish (Layer->Finish);
- break;
-
- case TILE_TEXTURE:
- New = (TEXTURE *) Create_Tiles_Texture ();
- ((TILES *)New)->Tile1 = Copy_Textures (((TILES *)Layer)->Tile1);
- ((TILES *)New)->Tile2 = Copy_Textures (((TILES *)Layer)->Tile2);
- ((TILES *)New)->Trans = Copy_Transform (((TILES *)Layer)->Trans);
- break;
-
- case MAT_TEXTURE:
- New = (TEXTURE *) Create_Material_Texture ();
- ((MATERIAL *)New)->Materials = Copy_Materials (((MATERIAL *)Layer)->Materials);
- ((MATERIAL *)New)->Trans = Copy_Transform (((MATERIAL *)Layer)->Trans);
- ((MATERIAL *)New)->Num_Of_Mats = (((MATERIAL *)Layer)->Num_Of_Mats);
- break;
- }
-
- if (First == NULL)
- First = New;
- if (Previous != NULL)
- Previous->Next_Layer = New;
- Previous = New;
- }
- return (First);
- }
-
- TEXTURE *Copy_Materials (Old)
- TEXTURE *Old;
- {
- TEXTURE *New, *First, *Previous, *Material;
-
- Previous = First = NULL;
-
- for (Material = Old;
- Material != NULL;
- Material = Material->Next_Material)
- {
- New = Copy_Textures (Material);
-
- if (First == NULL)
- First = New;
-
- if (Previous != NULL)
- Previous->Next_Material = New;
-
- Previous = New;
- }
- return (First);
- }
-
- void Destroy_Textures (Textures)
- TEXTURE *Textures;
- {
- TEXTURE *Layer=Textures;
- TEXTURE *Mats;
- TEXTURE *Temp;
-
- while (Layer != NULL)
- {
- Mats = Layer->Next_Material;
- while (Mats != NULL)
- {
- Temp = Mats->Next_Material;
- Destroy_Textures (Mats);
- Mats = Temp;
- }
- switch (Layer->Type)
- {
- case PNF_TEXTURE:
- Destroy_Pigment (Layer->Pigment);
- Destroy_Tnormal (Layer->Tnormal);
- Destroy_Finish (Layer->Finish);
- break;
-
- case TILE_TEXTURE:
- Destroy_Transform (((TILES *)Layer)->Trans);
- Destroy_Textures (((TILES *)Layer)->Tile1);
- Destroy_Textures (((TILES *)Layer)->Tile2);
- break;
-
- case MAT_TEXTURE:
- Destroy_Transform (((MATERIAL *)Layer)->Trans);
- Destroy_Textures (((MATERIAL *)Layer)->Materials);
- Destroy_Image (((MATERIAL *)Layer)->Image);
- break;
- }
- Temp = Layer->Next_Layer;
- free (Layer);
- Layer = Temp;
- }
- }
-
- void Post_Textures (Textures)
- TEXTURE *Textures;
- {
- TEXTURE *Layer, *Material;
-
- if (Textures == NULL)
- return;
-
- for (Layer = Textures;
- Layer != NULL;
- Layer = Layer->Next_Layer)
- {
- if (!((Layer->Flags) & POST_DONE))
- switch (Layer->Type)
- {
- case PNF_TEXTURE:
- Post_Pigment (Layer->Pigment);
- Post_Tnormal (Layer->Tnormal);
- break;
-
- case TILE_TEXTURE:
- Post_Textures (((TILES *)Layer)->Tile1);
- Post_Textures (((TILES *)Layer)->Tile2);
- break;
-
- case MAT_TEXTURE:
- for (Material = ((MATERIAL *)Layer)->Materials;
- Material != NULL;
- Material = Material->Next_Material)
- Post_Textures(Material);
- break;
- }
- }
- return;
- }
-
-