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820 lines
18 KiB
820 lines
18 KiB
/* |
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gl_warp.c - sky and water polygons |
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Copyright (C) 2010 Uncle Mike |
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This program is free software: you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation, either version 3 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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*/ |
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#include "gl_local.h" |
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#include "wadfile.h" |
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#define SKYCLOUDS_QUALITY 12 |
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#define MAX_CLIP_VERTS 128 // skybox clip vertices |
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#define TURBSCALE ( 256.0f / ( M_PI2 )) |
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const char* r_skyBoxSuffix[6] = { "rt", "bk", "lf", "ft", "up", "dn" }; |
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static const int r_skyTexOrder[6] = { 0, 2, 1, 3, 4, 5 }; |
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static const vec3_t skyclip[6] = |
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{ |
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{ 1, 1, 0 }, |
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{ 1, -1, 0 }, |
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{ 0, -1, 1 }, |
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{ 0, 1, 1 }, |
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{ 1, 0, 1 }, |
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{ -1, 0, 1 } |
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}; |
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// 1 = s, 2 = t, 3 = 2048 |
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static const int st_to_vec[6][3] = |
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{ |
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{ 3, -1, 2 }, |
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{ -3, 1, 2 }, |
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{ 1, 3, 2 }, |
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{ -1, -3, 2 }, |
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{ -2, -1, 3 }, // 0 degrees yaw, look straight up |
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{ 2, -1, -3 } // look straight down |
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}; |
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// s = [0]/[2], t = [1]/[2] |
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static const int vec_to_st[6][3] = |
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{ |
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{ -2, 3, 1 }, |
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{ 2, 3, -1 }, |
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{ 1, 3, 2 }, |
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{ -1, 3, -2 }, |
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{ -2, -1, 3 }, |
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{ -2, 1, -3 } |
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}; |
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// speed up sin calculations |
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float r_turbsin[] = |
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{ |
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#include "warpsin.h" |
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}; |
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#define SKYBOX_MISSED 0 |
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#define SKYBOX_HLSTYLE 1 |
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#define SKYBOX_Q1STYLE 2 |
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static int CheckSkybox( const char *name ) |
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{ |
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const char *skybox_ext[3] = { "dds", "tga", "bmp" }; |
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int i, j, num_checked_sides; |
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const char *sidename; |
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// search for skybox images |
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for( i = 0; i < 3; i++ ) |
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{ |
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num_checked_sides = 0; |
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for( j = 0; j < 6; j++ ) |
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{ |
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// build side name |
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sidename = va( "%s%s.%s", name, r_skyBoxSuffix[j], skybox_ext[i] ); |
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if( gEngfuncs.FS_FileExists( sidename, false )) |
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num_checked_sides++; |
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} |
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if( num_checked_sides == 6 ) |
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return SKYBOX_HLSTYLE; // image exists |
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for( j = 0; j < 6; j++ ) |
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{ |
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// build side name |
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sidename = va( "%s_%s.%s", name, r_skyBoxSuffix[j], skybox_ext[i] ); |
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if( gEngfuncs.FS_FileExists( sidename, false )) |
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num_checked_sides++; |
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} |
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if( num_checked_sides == 6 ) |
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return SKYBOX_Q1STYLE; // images exists |
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} |
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return SKYBOX_MISSED; |
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} |
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void DrawSkyPolygon( int nump, vec3_t vecs ) |
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{ |
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int i, j, axis; |
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float s, t, dv, *vp; |
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vec3_t v, av; |
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// decide which face it maps to |
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VectorClear( v ); |
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for( i = 0, vp = vecs; i < nump; i++, vp += 3 ) |
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VectorAdd( vp, v, v ); |
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av[0] = fabs( v[0] ); |
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av[1] = fabs( v[1] ); |
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av[2] = fabs( v[2] ); |
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if( av[0] > av[1] && av[0] > av[2] ) |
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axis = (v[0] < 0) ? 1 : 0; |
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else if( av[1] > av[2] && av[1] > av[0] ) |
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axis = (v[1] < 0) ? 3 : 2; |
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else axis = (v[2] < 0) ? 5 : 4; |
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// project new texture coords |
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for( i = 0; i < nump; i++, vecs += 3 ) |
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{ |
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j = vec_to_st[axis][2]; |
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dv = (j > 0) ? vecs[j-1] : -vecs[-j-1]; |
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if( dv == 0.0f ) continue; |
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j = vec_to_st[axis][0]; |
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s = (j < 0) ? -vecs[-j-1] / dv : vecs[j-1] / dv; |
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j = vec_to_st[axis][1]; |
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t = (j < 0) ? -vecs[-j-1] / dv : vecs[j-1] / dv; |
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if( s < RI.skyMins[0][axis] ) RI.skyMins[0][axis] = s; |
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if( t < RI.skyMins[1][axis] ) RI.skyMins[1][axis] = t; |
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if( s > RI.skyMaxs[0][axis] ) RI.skyMaxs[0][axis] = s; |
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if( t > RI.skyMaxs[1][axis] ) RI.skyMaxs[1][axis] = t; |
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} |
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} |
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/* |
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============== |
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ClipSkyPolygon |
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============== |
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*/ |
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void ClipSkyPolygon( int nump, vec3_t vecs, int stage ) |
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{ |
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const float *norm; |
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float *v, d, e; |
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qboolean front, back; |
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float dists[MAX_CLIP_VERTS + 1]; |
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int sides[MAX_CLIP_VERTS + 1]; |
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vec3_t newv[2][MAX_CLIP_VERTS + 1]; |
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int newc[2]; |
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int i, j; |
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if( nump > MAX_CLIP_VERTS ) |
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gEngfuncs.Host_Error( "ClipSkyPolygon: MAX_CLIP_VERTS\n" ); |
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loc1: |
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if( stage == 6 ) |
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{ |
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// fully clipped, so draw it |
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DrawSkyPolygon( nump, vecs ); |
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return; |
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} |
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front = back = false; |
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norm = skyclip[stage]; |
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for( i = 0, v = vecs; i < nump; i++, v += 3 ) |
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{ |
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d = DotProduct( v, norm ); |
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if( d > ON_EPSILON ) |
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{ |
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front = true; |
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sides[i] = SIDE_FRONT; |
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} |
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else if( d < -ON_EPSILON ) |
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{ |
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back = true; |
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sides[i] = SIDE_BACK; |
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} |
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else |
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{ |
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sides[i] = SIDE_ON; |
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} |
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dists[i] = d; |
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} |
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if( !front || !back ) |
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{ |
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// not clipped |
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stage++; |
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goto loc1; |
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} |
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// clip it |
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sides[i] = sides[0]; |
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dists[i] = dists[0]; |
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VectorCopy( vecs, ( vecs + ( i * 3 ))); |
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newc[0] = newc[1] = 0; |
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for( i = 0, v = vecs; i < nump; i++, v += 3 ) |
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{ |
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switch( sides[i] ) |
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{ |
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case SIDE_FRONT: |
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VectorCopy( v, newv[0][newc[0]] ); |
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newc[0]++; |
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break; |
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case SIDE_BACK: |
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VectorCopy( v, newv[1][newc[1]] ); |
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newc[1]++; |
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break; |
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case SIDE_ON: |
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VectorCopy( v, newv[0][newc[0]] ); |
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newc[0]++; |
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VectorCopy( v, newv[1][newc[1]] ); |
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newc[1]++; |
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break; |
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} |
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if( sides[i] == SIDE_ON || sides[i+1] == SIDE_ON || sides[i+1] == sides[i] ) |
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continue; |
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d = dists[i] / ( dists[i] - dists[i+1] ); |
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for( j = 0; j < 3; j++ ) |
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{ |
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e = v[j] + d * ( v[j+3] - v[j] ); |
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newv[0][newc[0]][j] = e; |
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newv[1][newc[1]][j] = e; |
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} |
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newc[0]++; |
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newc[1]++; |
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} |
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// continue |
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ClipSkyPolygon( newc[0], newv[0][0], stage + 1 ); |
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ClipSkyPolygon( newc[1], newv[1][0], stage + 1 ); |
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} |
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void MakeSkyVec( float s, float t, int axis ) |
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{ |
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int j, k, farclip; |
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vec3_t v, b; |
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farclip = RI.farClip; |
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b[0] = s * (farclip >> 1); |
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b[1] = t * (farclip >> 1); |
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b[2] = (farclip >> 1); |
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for( j = 0; j < 3; j++ ) |
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{ |
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k = st_to_vec[axis][j]; |
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v[j] = (k < 0) ? -b[-k-1] : b[k-1]; |
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v[j] += RI.cullorigin[j]; |
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} |
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// avoid bilerp seam |
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s = (s + 1.0f) * 0.5f; |
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t = (t + 1.0f) * 0.5f; |
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if( s < 1.0f / 512.0f ) |
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s = 1.0f / 512.0f; |
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else if( s > 511.0f / 512.0f ) |
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s = 511.0f / 512.0f; |
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if( t < 1.0f / 512.0f ) |
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t = 1.0f / 512.0f; |
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else if( t > 511.0f / 512.0f ) |
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t = 511.0f / 512.0f; |
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t = 1.0f - t; |
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pglTexCoord2f( s, t ); |
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pglVertex3fv( v ); |
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} |
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/* |
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============== |
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R_ClearSkyBox |
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============== |
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*/ |
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void R_ClearSkyBox( void ) |
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{ |
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int i; |
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for( i = 0; i < 6; i++ ) |
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{ |
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RI.skyMins[0][i] = RI.skyMins[1][i] = 9999999.0f; |
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RI.skyMaxs[0][i] = RI.skyMaxs[1][i] = -9999999.0f; |
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} |
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} |
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/* |
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================= |
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R_AddSkyBoxSurface |
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================= |
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*/ |
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void R_AddSkyBoxSurface( msurface_t *fa ) |
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{ |
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vec3_t verts[MAX_CLIP_VERTS]; |
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glpoly_t *p; |
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float *v; |
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int i; |
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if( gEngfuncs.CL_GetRenderParm( PARM_SKY_SPHERE, 0 ) && fa->polys && !tr.fCustomSkybox ) |
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{ |
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glpoly_t *p = fa->polys; |
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// draw the sky poly |
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pglBegin( GL_POLYGON ); |
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for( i = 0, v = p->verts[0]; i < p->numverts; i++, v += VERTEXSIZE ) |
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{ |
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pglTexCoord2f( v[3], v[4] ); |
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pglVertex3fv( v ); |
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} |
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pglEnd (); |
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} |
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// calculate vertex values for sky box |
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for( p = fa->polys; p; p = p->next ) |
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{ |
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for( i = 0; i < p->numverts; i++ ) |
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VectorSubtract( p->verts[i], RI.cullorigin, verts[i] ); |
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ClipSkyPolygon( p->numverts, verts[0], 0 ); |
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} |
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} |
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/* |
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============== |
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R_UnloadSkybox |
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Unload previous skybox |
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============== |
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*/ |
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void R_UnloadSkybox( void ) |
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{ |
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int i; |
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// release old skybox |
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for( i = 0; i < 6; i++ ) |
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{ |
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if( !tr.skyboxTextures[i] ) continue; |
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GL_FreeTexture( tr.skyboxTextures[i] ); |
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} |
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tr.skyboxbasenum = 5800; // set skybox base (to let some mods load hi-res skyboxes) |
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memset( tr.skyboxTextures, 0, sizeof( tr.skyboxTextures )); |
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tr.fCustomSkybox = false; |
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} |
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/* |
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============== |
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R_DrawSkybox |
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============== |
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*/ |
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void R_DrawSkyBox( void ) |
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{ |
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int i; |
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RI.isSkyVisible = true; |
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// don't fogging skybox (this fix old Half-Life bug) |
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if( !RI.fogSkybox ) R_AllowFog( false ); |
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if( RI.fogEnabled ) |
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pglFogf( GL_FOG_DENSITY, RI.fogDensity * 0.5f ); |
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pglDisable( GL_BLEND ); |
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pglDisable( GL_ALPHA_TEST ); |
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pglTexEnvi( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE ); |
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for( i = 0; i < 6; i++ ) |
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{ |
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if( RI.skyMins[0][i] >= RI.skyMaxs[0][i] || RI.skyMins[1][i] >= RI.skyMaxs[1][i] ) |
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continue; |
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if( tr.skyboxTextures[r_skyTexOrder[i]] ) |
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GL_Bind( XASH_TEXTURE0, tr.skyboxTextures[r_skyTexOrder[i]] ); |
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else GL_Bind( XASH_TEXTURE0, tr.grayTexture ); // stub |
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pglBegin( GL_QUADS ); |
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MakeSkyVec( RI.skyMins[0][i], RI.skyMins[1][i], i ); |
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MakeSkyVec( RI.skyMins[0][i], RI.skyMaxs[1][i], i ); |
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MakeSkyVec( RI.skyMaxs[0][i], RI.skyMaxs[1][i], i ); |
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MakeSkyVec( RI.skyMaxs[0][i], RI.skyMins[1][i], i ); |
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pglEnd(); |
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} |
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if( !RI.fogSkybox ) |
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R_AllowFog( true ); |
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if( RI.fogEnabled ) |
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pglFogf( GL_FOG_DENSITY, RI.fogDensity ); |
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R_LoadIdentity(); |
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} |
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/* |
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=============== |
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R_SetupSky |
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=============== |
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*/ |
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void R_SetupSky( const char *skyboxname ) |
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{ |
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char loadname[MAX_STRING]; |
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char sidename[MAX_STRING]; |
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int i, result; |
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if( !COM_CheckString( skyboxname )) |
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{ |
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R_UnloadSkybox(); |
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return; // clear old skybox |
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} |
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Q_snprintf( loadname, sizeof( loadname ), "gfx/env/%s", skyboxname ); |
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COM_StripExtension( loadname ); |
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// kill the underline suffix to find them manually later |
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if( loadname[Q_strlen( loadname ) - 1] == '_' ) |
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loadname[Q_strlen( loadname ) - 1] = '\0'; |
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result = CheckSkybox( loadname ); |
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// to prevent infinite recursion if default skybox was missed |
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if( result == SKYBOX_MISSED && Q_stricmp( loadname, DEFAULT_SKYBOX_PATH )) |
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{ |
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gEngfuncs.Con_Reportf( S_WARN "missed or incomplete skybox '%s'\n", skyboxname ); |
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R_SetupSky( "desert" ); // force to default |
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return; |
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} |
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// release old skybox |
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R_UnloadSkybox(); |
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gEngfuncs.Con_DPrintf( "SKY: " ); |
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for( i = 0; i < 6; i++ ) |
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{ |
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if( result == SKYBOX_HLSTYLE ) |
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Q_snprintf( sidename, sizeof( sidename ), "%s%s", loadname, r_skyBoxSuffix[i] ); |
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else Q_snprintf( sidename, sizeof( sidename ), "%s_%s", loadname, r_skyBoxSuffix[i] ); |
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tr.skyboxTextures[i] = GL_LoadTexture( sidename, NULL, 0, TF_CLAMP|TF_SKY ); |
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if( !tr.skyboxTextures[i] ) break; |
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gEngfuncs.Con_DPrintf( "%s%s%s", skyboxname, r_skyBoxSuffix[i], i != 5 ? ", " : ". " ); |
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} |
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if( i == 6 ) |
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{ |
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tr.fCustomSkybox = true; |
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gEngfuncs.Con_DPrintf( "done\n" ); |
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return; // loaded |
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} |
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gEngfuncs.Con_DPrintf( "^2failed\n" ); |
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R_UnloadSkybox(); |
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} |
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|
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//============================================================================== |
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// |
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// RENDER CLOUDS |
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// |
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//============================================================================== |
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/* |
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============== |
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R_CloudVertex |
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============== |
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*/ |
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void R_CloudVertex( float s, float t, int axis, vec3_t v ) |
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{ |
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int j, k, farclip; |
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vec3_t b; |
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farclip = RI.farClip; |
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b[0] = s * (farclip >> 1); |
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b[1] = t * (farclip >> 1); |
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b[2] = (farclip >> 1); |
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for( j = 0; j < 3; j++ ) |
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{ |
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k = st_to_vec[axis][j]; |
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v[j] = (k < 0) ? -b[-k-1] : b[k-1]; |
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v[j] += RI.cullorigin[j]; |
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} |
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} |
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|
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/* |
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============= |
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R_CloudTexCoord |
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============= |
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*/ |
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void R_CloudTexCoord( vec3_t v, float speed, float *s, float *t ) |
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{ |
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float length, speedscale; |
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vec3_t dir; |
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speedscale = gpGlobals->time * speed; |
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speedscale -= (int)speedscale & ~127; |
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VectorSubtract( v, RI.vieworg, dir ); |
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dir[2] *= 3.0f; // flatten the sphere |
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length = VectorLength( dir ); |
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length = 6.0f * 63.0f / length; |
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*s = ( speedscale + dir[0] * length ) * (1.0f / 128.0f); |
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*t = ( speedscale + dir[1] * length ) * (1.0f / 128.0f); |
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} |
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|
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/* |
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=============== |
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R_CloudDrawPoly |
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=============== |
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*/ |
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void R_CloudDrawPoly( glpoly_t *p ) |
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{ |
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float s, t; |
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float *v; |
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int i; |
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GL_SetRenderMode( kRenderNormal ); |
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GL_Bind( XASH_TEXTURE0, tr.solidskyTexture ); |
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pglBegin( GL_QUADS ); |
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for( i = 0, v = p->verts[0]; i < 4; i++, v += VERTEXSIZE ) |
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{ |
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R_CloudTexCoord( v, 8.0f, &s, &t ); |
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pglTexCoord2f( s, t ); |
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pglVertex3fv( v ); |
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} |
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pglEnd(); |
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GL_SetRenderMode( kRenderTransTexture ); |
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GL_Bind( XASH_TEXTURE0, tr.alphaskyTexture ); |
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pglBegin( GL_QUADS ); |
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for( i = 0, v = p->verts[0]; i < 4; i++, v += VERTEXSIZE ) |
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{ |
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R_CloudTexCoord( v, 16.0f, &s, &t ); |
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pglTexCoord2f( s, t ); |
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pglVertex3fv( v ); |
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} |
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pglEnd(); |
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pglDisable( GL_BLEND ); |
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} |
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|
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/* |
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============== |
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R_CloudRenderSide |
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============== |
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*/ |
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void R_CloudRenderSide( int axis ) |
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{ |
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vec3_t verts[4]; |
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float di, qi, dj, qj; |
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vec3_t vup, vright; |
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vec3_t temp, temp2; |
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glpoly_t p[1]; |
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int i, j; |
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R_CloudVertex( -1.0f, -1.0f, axis, verts[0] ); |
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R_CloudVertex( -1.0f, 1.0f, axis, verts[1] ); |
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R_CloudVertex( 1.0f, 1.0f, axis, verts[2] ); |
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R_CloudVertex( 1.0f, -1.0f, axis, verts[3] ); |
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VectorSubtract( verts[2], verts[3], vup ); |
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VectorSubtract( verts[2], verts[1], vright ); |
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p->numverts = 4; |
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di = SKYCLOUDS_QUALITY; |
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qi = 1.0 / di; |
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dj = (axis < 4) ? di * 2 : di; //subdivide vertically more than horizontally on skybox sides |
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qj = 1.0 / dj; |
|
|
|
for( i = 0; i < di; i++ ) |
|
{ |
|
for( j = 0; j < dj; j++ ) |
|
{ |
|
if( i * qi < RI.skyMins[0][axis] / 2 + 0.5f - qi |
|
|| i * qi > RI.skyMaxs[0][axis] / 2 + 0.5f |
|
|| j * qj < RI.skyMins[1][axis] / 2 + 0.5f - qj |
|
|| j * qj > RI.skyMaxs[1][axis] / 2 + 0.5f ) |
|
continue; |
|
|
|
VectorScale( vright, qi * i, temp ); |
|
VectorScale( vup, qj * j, temp2 ); |
|
VectorAdd( temp, temp2, temp ); |
|
VectorAdd( verts[0], temp, p->verts[0] ); |
|
|
|
VectorScale( vup, qj, temp ); |
|
VectorAdd( p->verts[0], temp, p->verts[1] ); |
|
|
|
VectorScale( vright, qi, temp ); |
|
VectorAdd( p->verts[1], temp, p->verts[2] ); |
|
|
|
VectorAdd( p->verts[0], temp, p->verts[3] ); |
|
|
|
R_CloudDrawPoly( p ); |
|
} |
|
} |
|
} |
|
|
|
/* |
|
============== |
|
R_DrawClouds |
|
|
|
Quake-style clouds |
|
============== |
|
*/ |
|
void R_DrawClouds( void ) |
|
{ |
|
int i; |
|
|
|
RI.isSkyVisible = true; |
|
|
|
if( RI.fogEnabled ) |
|
pglFogf( GL_FOG_DENSITY, RI.fogDensity * 0.25f ); |
|
pglDepthFunc( GL_GEQUAL ); |
|
pglDepthMask( GL_FALSE ); |
|
|
|
for( i = 0; i < 6; i++ ) |
|
{ |
|
if( RI.skyMins[0][i] >= RI.skyMaxs[0][i] || RI.skyMins[1][i] >= RI.skyMaxs[1][i] ) |
|
continue; |
|
R_CloudRenderSide( i ); |
|
} |
|
|
|
pglDepthFunc( GL_LEQUAL ); |
|
pglDepthMask( GL_TRUE ); |
|
|
|
if( RI.fogEnabled ) |
|
pglFogf( GL_FOG_DENSITY, RI.fogDensity ); |
|
} |
|
|
|
/* |
|
============= |
|
R_InitSkyClouds |
|
|
|
A sky texture is 256*128, with the right side being a masked overlay |
|
============== |
|
*/ |
|
void R_InitSkyClouds( mip_t *mt, texture_t *tx, qboolean custom_palette ) |
|
{ |
|
rgbdata_t r_temp, *r_sky; |
|
uint *trans, *rgba; |
|
uint transpix; |
|
int r, g, b; |
|
int i, j, p; |
|
char texname[32]; |
|
|
|
if( !glw_state.initialized ) |
|
return; |
|
|
|
Q_snprintf( texname, sizeof( texname ), "%s%s.mip", ( mt->offsets[0] > 0 ) ? "#" : "", tx->name ); |
|
|
|
if( mt->offsets[0] > 0 ) |
|
{ |
|
int size = (int)sizeof( mip_t ) + ((mt->width * mt->height * 85)>>6); |
|
|
|
if( custom_palette ) size += sizeof( short ) + 768; |
|
r_sky = gEngfuncs.FS_LoadImage( texname, (byte *)mt, size ); |
|
} |
|
else |
|
{ |
|
// okay, loading it from wad |
|
r_sky = gEngfuncs.FS_LoadImage( texname, NULL, 0 ); |
|
} |
|
|
|
// make sure what sky image is valid |
|
if( !r_sky || !r_sky->palette || r_sky->type != PF_INDEXED_32 || r_sky->height == 0 ) |
|
{ |
|
gEngfuncs.Con_Reportf( S_ERROR "R_InitSky: unable to load sky texture %s\n", tx->name ); |
|
if( r_sky ) gEngfuncs.FS_FreeImage( r_sky ); |
|
return; |
|
} |
|
|
|
// make an average value for the back to avoid |
|
// a fringe on the top level |
|
trans = Mem_Malloc( r_temppool, r_sky->height * r_sky->height * sizeof( *trans )); |
|
r = g = b = 0; |
|
|
|
for( i = 0; i < r_sky->width >> 1; i++ ) |
|
{ |
|
for( j = 0; j < r_sky->height; j++ ) |
|
{ |
|
p = r_sky->buffer[i * r_sky->width + j + r_sky->height]; |
|
rgba = (uint *)r_sky->palette + p; |
|
trans[(i * r_sky->height) + j] = *rgba; |
|
r += ((byte *)rgba)[0]; |
|
g += ((byte *)rgba)[1]; |
|
b += ((byte *)rgba)[2]; |
|
} |
|
} |
|
|
|
((byte *)&transpix)[0] = r / ( r_sky->height * r_sky->height ); |
|
((byte *)&transpix)[1] = g / ( r_sky->height * r_sky->height ); |
|
((byte *)&transpix)[2] = b / ( r_sky->height * r_sky->height ); |
|
((byte *)&transpix)[3] = 0; |
|
|
|
// build a temporary image |
|
r_temp = *r_sky; |
|
r_temp.width = r_sky->width >> 1; |
|
r_temp.height = r_sky->height; |
|
r_temp.type = PF_RGBA_32; |
|
r_temp.flags = IMAGE_HAS_COLOR; |
|
r_temp.size = r_temp.width * r_temp.height * 4; |
|
r_temp.buffer = (byte *)trans; |
|
r_temp.palette = NULL; |
|
|
|
// load it in |
|
tr.solidskyTexture = GL_LoadTextureInternal( "solid_sky", &r_temp, TF_NOMIPMAP ); |
|
|
|
for( i = 0; i < r_sky->width >> 1; i++ ) |
|
{ |
|
for( j = 0; j < r_sky->height; j++ ) |
|
{ |
|
p = r_sky->buffer[i * r_sky->width + j]; |
|
|
|
if( p == 0 ) |
|
{ |
|
trans[(i * r_sky->height) + j] = transpix; |
|
} |
|
else |
|
{ |
|
rgba = (uint *)r_sky->palette + p; |
|
trans[(i * r_sky->height) + j] = *rgba; |
|
} |
|
} |
|
} |
|
|
|
r_temp.flags = IMAGE_HAS_COLOR|IMAGE_HAS_ALPHA; |
|
|
|
// load it in |
|
tr.alphaskyTexture = GL_LoadTextureInternal( "alpha_sky", &r_temp, TF_NOMIPMAP ); |
|
|
|
// clean up |
|
gEngfuncs.FS_FreeImage( r_sky ); |
|
Mem_Free( trans ); |
|
} |
|
|
|
/* |
|
============= |
|
EmitWaterPolys |
|
|
|
Does a water warp on the pre-fragmented glpoly_t chain |
|
============= |
|
*/ |
|
void EmitWaterPolys( msurface_t *warp, qboolean reverse ) |
|
{ |
|
float *v, nv, waveHeight; |
|
float s, t, os, ot; |
|
glpoly_t *p; |
|
int i; |
|
|
|
if( !warp->polys ) return; |
|
|
|
// set the current waveheight |
|
if( warp->polys->verts[0][2] >= RI.vieworg[2] ) |
|
waveHeight = -RI.currententity->curstate.scale; |
|
else waveHeight = RI.currententity->curstate.scale; |
|
|
|
// reset fog color for nonlightmapped water |
|
GL_ResetFogColor(); |
|
|
|
if( FBitSet( warp->flags, SURF_DRAWTURB_QUADS )) |
|
pglBegin( GL_QUADS ); |
|
|
|
for( p = warp->polys; p; p = p->next ) |
|
{ |
|
if( reverse ) |
|
v = p->verts[0] + ( p->numverts - 1 ) * VERTEXSIZE; |
|
else v = p->verts[0]; |
|
|
|
if( !FBitSet( warp->flags, SURF_DRAWTURB_QUADS )) |
|
pglBegin( GL_POLYGON ); |
|
|
|
for( i = 0; i < p->numverts; i++ ) |
|
{ |
|
if( waveHeight ) |
|
{ |
|
nv = r_turbsin[(int)(gpGlobals->time * 160.0f + v[1] + v[0]) & 255] + 8.0f; |
|
nv = (r_turbsin[(int)(v[0] * 5.0f + gpGlobals->time * 171.0f - v[1]) & 255] + 8.0f ) * 0.8f + nv; |
|
nv = nv * waveHeight + v[2]; |
|
} |
|
else nv = v[2]; |
|
|
|
os = v[3]; |
|
ot = v[4]; |
|
|
|
s = os + r_turbsin[(int)((ot * 0.125f + gpGlobals->time) * TURBSCALE) & 255]; |
|
s *= ( 1.0f / SUBDIVIDE_SIZE ); |
|
|
|
t = ot + r_turbsin[(int)((os * 0.125f + gpGlobals->time) * TURBSCALE) & 255]; |
|
t *= ( 1.0f / SUBDIVIDE_SIZE ); |
|
|
|
pglTexCoord2f( s, t ); |
|
pglVertex3f( v[0], v[1], nv ); |
|
|
|
if( reverse ) |
|
v -= VERTEXSIZE; |
|
else v += VERTEXSIZE; |
|
} |
|
|
|
if( !FBitSet( warp->flags, SURF_DRAWTURB_QUADS )) |
|
pglEnd(); |
|
} |
|
|
|
if( FBitSet( warp->flags, SURF_DRAWTURB_QUADS )) |
|
pglEnd(); |
|
|
|
GL_SetupFogColorForSurfaces(); |
|
}
|
|
|