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Diffstat (limited to 'samples/quake/jni/gl_warp.cpp')
| -rw-r--r-- | samples/quake/jni/gl_warp.cpp | 1153 |
1 files changed, 0 insertions, 1153 deletions
diff --git a/samples/quake/jni/gl_warp.cpp b/samples/quake/jni/gl_warp.cpp deleted file mode 100644 index f8403e1..0000000 --- a/samples/quake/jni/gl_warp.cpp +++ /dev/null @@ -1,1153 +0,0 @@ -/* -Copyright (C) 1996-1997 Id Software, Inc. - -This program is free software; you can redistribute it and/or -modify it under the terms of the GNU General Public License -as published by the Free Software Foundation; either version 2 -of the License, or (at your option) any later version. - -This program is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. - -See the GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with this program; if not, write to the Free Software -Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - -*/ -// gl_warp.c -- sky and water polygons - -#include "quakedef.h" - -extern model_t *loadmodel; - -//int skytexturenum; - -int solidskytexture; -int alphaskytexture; -float speedscale; // for top sky and bottom sky - -msurface_t *warpface; - -extern cvar_t gl_subdivide_size; - -void BoundPoly (int numverts, float *verts, vec3_t mins, vec3_t maxs) -{ - int i, j; - float *v; - - mins[0] = mins[1] = mins[2] = 9999; - maxs[0] = maxs[1] = maxs[2] = -9999; - v = verts; - for (i=0 ; i<numverts ; i++) - for (j=0 ; j<3 ; j++, v++) - { - if (*v < mins[j]) - mins[j] = *v; - if (*v > maxs[j]) - maxs[j] = *v; - } -} - -void SubdividePolygon (int numverts, float *verts) -{ - int i, j, k; - vec3_t mins, maxs; - float m; - float *v; - vec3_t front[64], back[64]; - int f, b; - float dist[64]; - float frac; - glpoly_t *poly; - float s, t; - - if (numverts > 60) - Sys_Error ("numverts = %i", numverts); - - BoundPoly (numverts, verts, mins, maxs); - - for (i=0 ; i<3 ; i++) - { - m = (mins[i] + maxs[i]) * 0.5; - m = gl_subdivide_size.value * floor (m/gl_subdivide_size.value + 0.5); - if (maxs[i] - m < 8) - continue; - if (m - mins[i] < 8) - continue; - - // cut it - v = verts + i; - for (j=0 ; j<numverts ; j++, v+= 3) - dist[j] = *v - m; - - // wrap cases - dist[j] = dist[0]; - v-=i; - VectorCopy (verts, v); - - f = b = 0; - v = verts; - for (j=0 ; j<numverts ; j++, v+= 3) - { - if (dist[j] >= 0) - { - VectorCopy (v, front[f]); - f++; - } - if (dist[j] <= 0) - { - VectorCopy (v, back[b]); - b++; - } - if (dist[j] == 0 || dist[j+1] == 0) - continue; - if ( (dist[j] > 0) != (dist[j+1] > 0) ) - { - // clip point - frac = dist[j] / (dist[j] - dist[j+1]); - for (k=0 ; k<3 ; k++) - front[f][k] = back[b][k] = v[k] + frac*(v[3+k] - v[k]); - f++; - b++; - } - } - - SubdividePolygon (f, front[0]); - SubdividePolygon (b, back[0]); - return; - } - - poly = (glpoly_t*) Hunk_Alloc (sizeof(glpoly_t) + (numverts-4) * VERTEXSIZE*sizeof(float)); - poly->next = warpface->polys; - warpface->polys = poly; - poly->numverts = numverts; - for (i=0 ; i<numverts ; i++, verts+= 3) - { - VectorCopy (verts, poly->verts[i]); - s = DotProduct (verts, warpface->texinfo->vecs[0]); - t = DotProduct (verts, warpface->texinfo->vecs[1]); - poly->verts[i][3] = s; - poly->verts[i][4] = t; - } -} - -/* -================ -GL_SubdivideSurface - -Breaks a polygon up along axial 64 unit -boundaries so that turbulent and sky warps -can be done reasonably. -================ -*/ -void GL_SubdivideSurface (msurface_t *fa) -{ - vec3_t verts[64]; - int numverts; - int i; - int lindex; - float *vec; - texture_t *t; - - warpface = fa; - - // - // convert edges back to a normal polygon - // - numverts = 0; - for (i=0 ; i<fa->numedges ; i++) - { - lindex = loadmodel->surfedges[fa->firstedge + i]; - - if (lindex > 0) - vec = loadmodel->vertexes[loadmodel->edges[lindex].v[0]].position; - else - vec = loadmodel->vertexes[loadmodel->edges[-lindex].v[1]].position; - VectorCopy (vec, verts[numverts]); - numverts++; - } - - SubdividePolygon (numverts, verts[0]); -} - -//========================================================= - - - -// speed up sin calculations - Ed -float turbsin[] = -{ - #include "gl_warp_sin.h" -}; -#define TURBSCALE (256.0 / (2 * M_PI)) - -/* -============= -EmitWaterPolys - -Does a water warp on the pre-fragmented glpoly_t chain -============= -*/ -void EmitWaterPolys (msurface_t *fa) -{ - glpoly_t *p; - float *v; - int i; - float s, t, os, ot; - - - for (p=fa->polys ; p ; p=p->next) - { -#ifdef USE_OPENGLES - { - float* pUV = gTexCoordBuffer; - for (i=0,v=p->verts[0] ; i<p->numverts ; i++, v+=VERTEXSIZE) - { - os = v[3]; - ot = v[4]; - - s = os + turbsin[(int)((ot*0.125+realtime) * TURBSCALE) & 255]; - s *= (1.0/64); - - t = ot + turbsin[(int)((os*0.125+realtime) * TURBSCALE) & 255]; - t *= (1.0/64); - - *pUV++ = s; - *pUV++ = t; - } - } - - glVertexPointer(3, GL_FLOAT, VERTEXSIZE*sizeof(float), &p->verts[0][0]); - glTexCoordPointer(2, GL_FLOAT, 0, gTexCoordBuffer); - glDrawArrays(GL_TRIANGLE_FAN, 0, p->numverts); -#else - glBegin (GL_POLYGON); - for (i=0,v=p->verts[0] ; i<p->numverts ; i++, v+=VERTEXSIZE) - { - os = v[3]; - ot = v[4]; - - s = os + turbsin[(int)((ot*0.125+realtime) * TURBSCALE) & 255]; - s *= (1.0/64); - - t = ot + turbsin[(int)((os*0.125+realtime) * TURBSCALE) & 255]; - t *= (1.0/64); - - glTexCoord2f (s, t); - glVertex3fv (v); - } - glEnd (); -#endif - } -} - - - - -/* -============= -EmitSkyPolys -============= -*/ -void EmitSkyPolys (msurface_t *fa) -{ - glpoly_t *p; - float *v; - int i; - float s, t; - vec3_t dir; - float length; - - for (p=fa->polys ; p ; p=p->next) - { -#ifdef USE_OPENGLES - { - float* pUV = gTexCoordBuffer; - for (i=0,v=p->verts[0] ; i<p->numverts ; i++, v+=VERTEXSIZE) - { - VectorSubtract (v, r_origin, dir); - dir[2] *= 3; // flatten the sphere - - length = dir[0]*dir[0] + dir[1]*dir[1] + dir[2]*dir[2]; - length = sqrt (length); - length = 6*63/length; - - dir[0] *= length; - dir[1] *= length; - - s = (speedscale + dir[0]) * (1.0/128); - t = (speedscale + dir[1]) * (1.0/128); - - *pUV++ = s; - *pUV++ = t; - } - } - - glVertexPointer(3, GL_FLOAT, VERTEXSIZE*sizeof(float), &p->verts[0][0]); - glTexCoordPointer(2, GL_FLOAT, 0, gTexCoordBuffer); - glDrawArrays(GL_TRIANGLE_FAN, 0, p->numverts); -#else - glBegin (GL_POLYGON); - for (i=0,v=p->verts[0] ; i<p->numverts ; i++, v+=VERTEXSIZE) - { - VectorSubtract (v, r_origin, dir); - dir[2] *= 3; // flatten the sphere - - length = dir[0]*dir[0] + dir[1]*dir[1] + dir[2]*dir[2]; - length = sqrt (length); - length = 6*63/length; - - dir[0] *= length; - dir[1] *= length; - - s = (speedscale + dir[0]) * (1.0/128); - t = (speedscale + dir[1]) * (1.0/128); - - glTexCoord2f (s, t); - glVertex3fv (v); - } - glEnd (); -#endif - } -} - -/* -=============== -EmitBothSkyLayers - -Does a sky warp on the pre-fragmented glpoly_t chain -This will be called for brushmodels, the world -will have them chained together. -=============== -*/ -void EmitBothSkyLayers (msurface_t *fa) -{ - int i; - int lindex; - float *vec; - - GL_DisableMultitexture(); - - GL_Bind (solidskytexture); - speedscale = realtime*8; - speedscale -= (int)speedscale & ~127 ; - - EmitSkyPolys (fa); - - glEnable (GL_BLEND); - GL_Bind (alphaskytexture); - speedscale = realtime*16; - speedscale -= (int)speedscale & ~127 ; - - EmitSkyPolys (fa); - - glDisable (GL_BLEND); -} - -#ifndef QUAKE2 -/* -================= -R_DrawSkyChain -================= -*/ -void R_DrawSkyChain (msurface_t *s) -{ - msurface_t *fa; - - GL_DisableMultitexture(); - - // used when gl_texsort is on - GL_Bind(solidskytexture); - speedscale = realtime*8; - speedscale -= (int)speedscale & ~127 ; - - for (fa=s ; fa ; fa=fa->texturechain) - EmitSkyPolys (fa); - - glEnable (GL_BLEND); - GL_Bind (alphaskytexture); - speedscale = realtime*16; - speedscale -= (int)speedscale & ~127 ; - - for (fa=s ; fa ; fa=fa->texturechain) - EmitSkyPolys (fa); - - glDisable (GL_BLEND); -} - -#endif - -/* -================================================================= - - Quake 2 environment sky - -================================================================= -*/ - -#ifdef QUAKE2 - - -#define SKY_TEX 2000 - -/* -================================================================= - - PCX Loading - -================================================================= -*/ - -typedef struct -{ - char manufacturer; - char version; - char encoding; - char bits_per_pixel; - unsigned short xmin,ymin,xmax,ymax; - unsigned short hres,vres; - unsigned char palette[48]; - char reserved; - char color_planes; - unsigned short bytes_per_line; - unsigned short palette_type; - char filler[58]; - unsigned data; // unbounded -} pcx_t; - -byte *pcx_rgb; - -/* -============ -LoadPCX -============ -*/ -void LoadPCX (FILE *f) -{ - pcx_t *pcx, pcxbuf; - byte palette[768]; - byte *pix; - int x, y; - int dataByte, runLength; - int count; - -// -// parse the PCX file -// - fread (&pcxbuf, 1, sizeof(pcxbuf), f); - - pcx = &pcxbuf; - - if (pcx->manufacturer != 0x0a - || pcx->version != 5 - || pcx->encoding != 1 - || pcx->bits_per_pixel != 8 - || pcx->xmax >= 320 - || pcx->ymax >= 256) - { - Con_Printf ("Bad pcx file\n"); - return; - } - - // seek to palette - fseek (f, -768, SEEK_END); - fread (palette, 1, 768, f); - - fseek (f, sizeof(pcxbuf) - 4, SEEK_SET); - - count = (pcx->xmax+1) * (pcx->ymax+1); - pcx_rgb = malloc( count * 4); - - for (y=0 ; y<=pcx->ymax ; y++) - { - pix = pcx_rgb + 4*y*(pcx->xmax+1); - for (x=0 ; x<=pcx->ymax ; ) - { - dataByte = fgetc(f); - - if((dataByte & 0xC0) == 0xC0) - { - runLength = dataByte & 0x3F; - dataByte = fgetc(f); - } - else - runLength = 1; - - while(runLength-- > 0) - { - pix[0] = palette[dataByte*3]; - pix[1] = palette[dataByte*3+1]; - pix[2] = palette[dataByte*3+2]; - pix[3] = 255; - pix += 4; - x++; - } - } - } -} - -/* -========================================================= - -TARGA LOADING - -========================================================= -*/ - -typedef struct _TargaHeader { - unsigned char id_length, colormap_type, image_type; - unsigned short colormap_index, colormap_length; - unsigned char colormap_size; - unsigned short x_origin, y_origin, width, height; - unsigned char pixel_size, attributes; -} TargaHeader; - - -TargaHeader targa_header; -byte *targa_rgba; - -int fgetLittleShort (FILE *f) -{ - byte b1, b2; - - b1 = fgetc(f); - b2 = fgetc(f); - - return (short)(b1 + b2*256); -} - -int fgetLittleLong (FILE *f) -{ - byte b1, b2, b3, b4; - - b1 = fgetc(f); - b2 = fgetc(f); - b3 = fgetc(f); - b4 = fgetc(f); - - return b1 + (b2<<8) + (b3<<16) + (b4<<24); -} - - -/* -============= -LoadTGA -============= -*/ -void LoadTGA (FILE *fin) -{ - int columns, rows, numPixels; - byte *pixbuf; - int row, column; - - targa_header.id_length = fgetc(fin); - targa_header.colormap_type = fgetc(fin); - targa_header.image_type = fgetc(fin); - - targa_header.colormap_index = fgetLittleShort(fin); - targa_header.colormap_length = fgetLittleShort(fin); - targa_header.colormap_size = fgetc(fin); - targa_header.x_origin = fgetLittleShort(fin); - targa_header.y_origin = fgetLittleShort(fin); - targa_header.width = fgetLittleShort(fin); - targa_header.height = fgetLittleShort(fin); - targa_header.pixel_size = fgetc(fin); - targa_header.attributes = fgetc(fin); - - if (targa_header.image_type!=2 - && targa_header.image_type!=10) - Sys_Error ("LoadTGA: Only type 2 and 10 targa RGB images supported\n"); - - if (targa_header.colormap_type !=0 - || (targa_header.pixel_size!=32 && targa_header.pixel_size!=24)) - Sys_Error ("Texture_LoadTGA: Only 32 or 24 bit images supported (no colormaps)\n"); - - columns = targa_header.width; - rows = targa_header.height; - numPixels = columns * rows; - - targa_rgba = malloc (numPixels*4); - - if (targa_header.id_length != 0) - fseek(fin, targa_header.id_length, SEEK_CUR); // skip TARGA image comment - - if (targa_header.image_type==2) { // Uncompressed, RGB images - for(row=rows-1; row>=0; row--) { - pixbuf = targa_rgba + row*columns*4; - for(column=0; column<columns; column++) { - unsigned char red,green,blue,alphabyte; - switch (targa_header.pixel_size) { - case 24: - - blue = getc(fin); - green = getc(fin); - red = getc(fin); - *pixbuf++ = red; - *pixbuf++ = green; - *pixbuf++ = blue; - *pixbuf++ = 255; - break; - case 32: - blue = getc(fin); - green = getc(fin); - red = getc(fin); - alphabyte = getc(fin); - *pixbuf++ = red; - *pixbuf++ = green; - *pixbuf++ = blue; - *pixbuf++ = alphabyte; - break; - } - } - } - } - else if (targa_header.image_type==10) { // Runlength encoded RGB images - unsigned char red,green,blue,alphabyte,packetHeader,packetSize,j; - for(row=rows-1; row>=0; row--) { - pixbuf = targa_rgba + row*columns*4; - for(column=0; column<columns; ) { - packetHeader=getc(fin); - packetSize = 1 + (packetHeader & 0x7f); - if (packetHeader & 0x80) { // run-length packet - switch (targa_header.pixel_size) { - case 24: - blue = getc(fin); - green = getc(fin); - red = getc(fin); - alphabyte = 255; - break; - case 32: - blue = getc(fin); - green = getc(fin); - red = getc(fin); - alphabyte = getc(fin); - break; - } - - for(j=0;j<packetSize;j++) { - *pixbuf++=red; - *pixbuf++=green; - *pixbuf++=blue; - *pixbuf++=alphabyte; - column++; - if (column==columns) { // run spans across rows - column=0; - if (row>0) - row--; - else - goto breakOut; - pixbuf = targa_rgba + row*columns*4; - } - } - } - else { // non run-length packet - for(j=0;j<packetSize;j++) { - switch (targa_header.pixel_size) { - case 24: - blue = getc(fin); - green = getc(fin); - red = getc(fin); - *pixbuf++ = red; - *pixbuf++ = green; - *pixbuf++ = blue; - *pixbuf++ = 255; - break; - case 32: - blue = getc(fin); - green = getc(fin); - red = getc(fin); - alphabyte = getc(fin); - *pixbuf++ = red; - *pixbuf++ = green; - *pixbuf++ = blue; - *pixbuf++ = alphabyte; - break; - } - column++; - if (column==columns) { // pixel packet run spans across rows - column=0; - if (row>0) - row--; - else - goto breakOut; - pixbuf = targa_rgba + row*columns*4; - } - } - } - } - breakOut:; - } - } - - fclose(fin); -} - -/* -================== -R_LoadSkys -================== -*/ -char *suf[6] = {"rt", "bk", "lf", "ft", "up", "dn"}; -void R_LoadSkys (void) -{ - int i; - FILE *f; - char name[64]; - - for (i=0 ; i<6 ; i++) - { - GL_Bind (SKY_TEX + i); - sprintf (name, "gfx/env/bkgtst%s.tga", suf[i]); - COM_FOpenFile (name, &f); - if (!f) - { - Con_Printf ("Couldn't load %s\n", name); - continue; - } - LoadTGA (f); -// LoadPCX (f); - - glTexImage2DHelper (GL_TEXTURE_2D, 0, gl_solid_format, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, targa_rgba); -// glTexImage2DHelper (GL_TEXTURE_2D, 0, gl_solid_format, 256, 256, 0, GL_RGBA, GL_UNSIGNED_BYTE, pcx_rgb); - - free (targa_rgba); -// free (pcx_rgb); - - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - } -} - - -vec3_t skyclip[6] = { - {1,1,0}, - {1,-1,0}, - {0,-1,1}, - {0,1,1}, - {1,0,1}, - {-1,0,1} -}; -int c_sky; - -// 1 = s, 2 = t, 3 = 2048 -int st_to_vec[6][3] = -{ - {3,-1,2}, - {-3,1,2}, - - {1,3,2}, - {-1,-3,2}, - - {-2,-1,3}, // 0 degrees yaw, look straight up - {2,-1,-3} // look straight down - -// {-1,2,3}, -// {1,2,-3} -}; - -// s = [0]/[2], t = [1]/[2] -int vec_to_st[6][3] = -{ - {-2,3,1}, - {2,3,-1}, - - {1,3,2}, - {-1,3,-2}, - - {-2,-1,3}, - {-2,1,-3} - -// {-1,2,3}, -// {1,2,-3} -}; - -float skymins[2][6], skymaxs[2][6]; - -void DrawSkyPolygon (int nump, vec3_t vecs) -{ - int i,j; - vec3_t v, av; - float s, t, dv; - int axis; - float *vp; - - c_sky++; -#if 0 -glBegin (GL_POLYGON); -for (i=0 ; i<nump ; i++, vecs+=3) -{ - VectorAdd(vecs, r_origin, v); - glVertex3fv (v); -} -glEnd(); -return; -#endif - // decide which face it maps to - VectorCopy (vec3_origin, v); - for (i=0, vp=vecs ; i<nump ; i++, vp+=3) - { - VectorAdd (vp, v, v); - } - av[0] = fabs(v[0]); - av[1] = fabs(v[1]); - av[2] = fabs(v[2]); - if (av[0] > av[1] && av[0] > av[2]) - { - if (v[0] < 0) - axis = 1; - else - axis = 0; - } - else if (av[1] > av[2] && av[1] > av[0]) - { - if (v[1] < 0) - axis = 3; - else - axis = 2; - } - else - { - if (v[2] < 0) - axis = 5; - else - axis = 4; - } - - // project new texture coords - for (i=0 ; i<nump ; i++, vecs+=3) - { - j = vec_to_st[axis][2]; - if (j > 0) - dv = vecs[j - 1]; - else - dv = -vecs[-j - 1]; - - j = vec_to_st[axis][0]; - if (j < 0) - s = -vecs[-j -1] / dv; - else - s = vecs[j-1] / dv; - j = vec_to_st[axis][1]; - if (j < 0) - t = -vecs[-j -1] / dv; - else - t = vecs[j-1] / dv; - - if (s < skymins[0][axis]) - skymins[0][axis] = s; - if (t < skymins[1][axis]) - skymins[1][axis] = t; - if (s > skymaxs[0][axis]) - skymaxs[0][axis] = s; - if (t > skymaxs[1][axis]) - skymaxs[1][axis] = t; - } -} - -#define MAX_CLIP_VERTS 64 -void ClipSkyPolygon (int nump, vec3_t vecs, int stage) -{ - float *norm; - float *v; - qboolean front, back; - float d, e; - float dists[MAX_CLIP_VERTS]; - int sides[MAX_CLIP_VERTS]; - vec3_t newv[2][MAX_CLIP_VERTS]; - int newc[2]; - int i, j; - - if (nump > MAX_CLIP_VERTS-2) - Sys_Error ("ClipSkyPolygon: MAX_CLIP_VERTS"); - if (stage == 6) - { // fully clipped, so draw it - DrawSkyPolygon (nump, vecs); - return; - } - - front = back = false; - norm = skyclip[stage]; - for (i=0, v = vecs ; i<nump ; i++, v+=3) - { - d = DotProduct (v, norm); - if (d > ON_EPSILON) - { - front = true; - sides[i] = SIDE_FRONT; - } - else if (d < ON_EPSILON) - { - back = true; - sides[i] = SIDE_BACK; - } - else - sides[i] = SIDE_ON; - dists[i] = d; - } - - if (!front || !back) - { // not clipped - ClipSkyPolygon (nump, vecs, stage+1); - return; - } - - // clip it - sides[i] = sides[0]; - dists[i] = dists[0]; - VectorCopy (vecs, (vecs+(i*3)) ); - newc[0] = newc[1] = 0; - - for (i=0, v = vecs ; i<nump ; i++, v+=3) - { - switch (sides[i]) - { - case SIDE_FRONT: - VectorCopy (v, newv[0][newc[0]]); - newc[0]++; - break; - case SIDE_BACK: - VectorCopy (v, newv[1][newc[1]]); - newc[1]++; - break; - case SIDE_ON: - VectorCopy (v, newv[0][newc[0]]); - newc[0]++; - VectorCopy (v, newv[1][newc[1]]); - newc[1]++; - break; - } - - if (sides[i] == SIDE_ON || sides[i+1] == SIDE_ON || sides[i+1] == sides[i]) - continue; - - d = dists[i] / (dists[i] - dists[i+1]); - for (j=0 ; j<3 ; j++) - { - e = v[j] + d*(v[j+3] - v[j]); - newv[0][newc[0]][j] = e; - newv[1][newc[1]][j] = e; - } - newc[0]++; - newc[1]++; - } - - // continue - ClipSkyPolygon (newc[0], newv[0][0], stage+1); - ClipSkyPolygon (newc[1], newv[1][0], stage+1); -} - -/* -================= -R_DrawSkyChain -================= -*/ -void R_DrawSkyChain (msurface_t *s) -{ - msurface_t *fa; - - int i; - vec3_t verts[MAX_CLIP_VERTS]; - glpoly_t *p; - - c_sky = 0; - GL_Bind(solidskytexture); - - // calculate vertex values for sky box - - for (fa=s ; fa ; fa=fa->texturechain) - { - for (p=fa->polys ; p ; p=p->next) - { - for (i=0 ; i<p->numverts ; i++) - { - VectorSubtract (p->verts[i], r_origin, verts[i]); - } - ClipSkyPolygon (p->numverts, verts[0], 0); - } - } -} - - -/* -============== -R_ClearSkyBox -============== -*/ -void R_ClearSkyBox (void) -{ - int i; - - for (i=0 ; i<6 ; i++) - { - skymins[0][i] = skymins[1][i] = 9999; - skymaxs[0][i] = skymaxs[1][i] = -9999; - } -} - - -void MakeSkyVec (float s, float t, int axis) -{ - vec3_t v, b; - int j, k; - - b[0] = s*2048; - b[1] = t*2048; - b[2] = 2048; - - for (j=0 ; j<3 ; j++) - { - k = st_to_vec[axis][j]; - if (k < 0) - v[j] = -b[-k - 1]; - else - v[j] = b[k - 1]; - v[j] += r_origin[j]; - } - - // avoid bilerp seam - s = (s+1)*0.5; - t = (t+1)*0.5; - - if (s < 1.0/512) - s = 1.0/512; - else if (s > 511.0/512) - s = 511.0/512; - if (t < 1.0/512) - t = 1.0/512; - else if (t > 511.0/512) - t = 511.0/512; - - t = 1.0 - t; - glTexCoord2f (s, t); - glVertex3fv (v); -} - -/* -============== -R_DrawSkyBox -============== -*/ -int skytexorder[6] = {0,2,1,3,4,5}; -void R_DrawSkyBox (void) -{ - int i, j, k; - vec3_t v; - float s, t; - -#if 0 -glEnable (GL_BLEND); -glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE); -glColor4f (1,1,1,0.5); -glDisable (GL_DEPTH_TEST); -#endif - for (i=0 ; i<6 ; i++) - { - if (skymins[0][i] >= skymaxs[0][i] - || skymins[1][i] >= skymaxs[1][i]) - continue; - - GL_Bind (SKY_TEX+skytexorder[i]); -#if 0 -skymins[0][i] = -1; -skymins[1][i] = -1; -skymaxs[0][i] = 1; -skymaxs[1][i] = 1; -#endif - glBegin (GL_QUADS); - MakeSkyVec (skymins[0][i], skymins[1][i], i); - MakeSkyVec (skymins[0][i], skymaxs[1][i], i); - MakeSkyVec (skymaxs[0][i], skymaxs[1][i], i); - MakeSkyVec (skymaxs[0][i], skymins[1][i], i); - glEnd (); - } -#if 0 -glDisable (GL_BLEND); -glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); -glColor4f (1,1,1,0.5); -glEnable (GL_DEPTH_TEST); -#endif -} - - -#endif - -//=============================================================== - -static texture_t* current_sky_mt; - -/* -============= -R_InitSky - -A sky texture is 256*128, with the right side being a masked overlay -============== -*/ -void R_InitSky (texture_t *mt) -{ - int i, j, p; - byte *src; - unsigned trans[128*128]; - unsigned transpix; - int r, g, b; - unsigned *rgba; - // extern int skytexturenum; - - current_sky_mt = mt; - - src = (byte *)mt + mt->offsets[0]; - - // make an average value for the back to avoid - // a fringe on the top level - - r = g = b = 0; - for (i=0 ; i<128 ; i++) - for (j=0 ; j<128 ; j++) - { - p = src[i*256 + j + 128]; - rgba = &d_8to24table[p]; - trans[(i*128) + j] = *rgba; - r += ((byte *)rgba)[0]; - g += ((byte *)rgba)[1]; - b += ((byte *)rgba)[2]; - } - - ((byte *)&transpix)[0] = r/(128*128); - ((byte *)&transpix)[1] = g/(128*128); - ((byte *)&transpix)[2] = b/(128*128); - ((byte *)&transpix)[3] = 0; - - - if (!solidskytexture) - solidskytexture = texture_extension_number++; - GL_Bind (solidskytexture ); - glTexImage2DHelper (GL_TEXTURE_2D, 0, gl_solid_format, 128, 128, 0, GL_RGBA, GL_UNSIGNED_BYTE, trans); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); - - - for (i=0 ; i<128 ; i++) - for (j=0 ; j<128 ; j++) - { - p = src[i*256 + j]; - if (p == 0) - trans[(i*128) + j] = transpix; - else - trans[(i*128) + j] = d_8to24table[p]; - } - - if (!alphaskytexture) - alphaskytexture = texture_extension_number++; - GL_Bind(alphaskytexture); - glTexImage2DHelper (GL_TEXTURE_2D, 0, gl_alpha_format, 128, 128, 0, GL_RGBA, GL_UNSIGNED_BYTE, trans); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); - glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); -} - -void R_ReloadSky() { - if (current_sky_mt) { - R_InitSky(current_sky_mt); - } -} |