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https://github.com/nzp-team/fteqw.git
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e3e01642bc
git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@1470 fc73d0e0-1445-4013-8a0c-d673dee63da5
1002 lines
20 KiB
C
1002 lines
20 KiB
C
/*
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Copyright (C) 1996-1997 Id Software, Inc.
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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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.
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See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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// gl_warp.c -- sky and water polygons
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#include "quakedef.h"
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#ifdef RGLQUAKE
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#include "glquake.h"
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#ifdef Q3SHADERS
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#include "shader.h"
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#endif
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#include <ctype.h>
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extern void GL_DrawAliasMesh (mesh_t *mesh, int texnum);
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void R_DrawSkySphere (msurface_t *fa);
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extern model_t *loadmodel;
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int skytexturenum;
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int solidskytexture;
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int alphaskytexture;
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float speedscale; // for top sky and bottom sky
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float skyrotate;
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vec3_t skyaxis;
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qboolean usingskybox;
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msurface_t *warpface;
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extern cvar_t gl_skyboxname;
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extern cvar_t gl_skyboxdist;
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extern cvar_t r_fastsky;
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extern cvar_t r_fastskycolour;
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char defaultskybox[MAX_QPATH];
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qboolean reloadskybox;
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int skyboxtex[6];
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void R_DrawSkyBox (msurface_t *s);
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void BoundPoly (int numverts, float *verts, vec3_t mins, vec3_t maxs)
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{
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int i, j;
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float *v;
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mins[0] = mins[1] = mins[2] = 9999;
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maxs[0] = maxs[1] = maxs[2] = -9999;
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v = verts;
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for (i=0 ; i<numverts ; i++)
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for (j=0 ; j<3 ; j++, v++)
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{
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if (*v < mins[j])
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mins[j] = *v;
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if (*v > maxs[j])
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maxs[j] = *v;
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}
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}
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//=========================================================
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/*
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// speed up sin calculations - Ed
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float turbsin[] =
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{
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#include "gl_warp_sin.h"
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};
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#define TURBSCALE (256.0 / (2 * M_PI))
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*/
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/*
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=============
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EmitWaterPolys
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Does a water warp on the pre-fragmented glpoly_t chain
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=============
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*/
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void EmitWaterPolys (msurface_t *fa, float basealpha)
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{
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float a;
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int l;
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extern cvar_t r_waterlayers;
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//the code prior to april 2005 gave a nicer result, but was incompatable with meshes and required poly lists instead
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//the new code uses vertex arrays but sacrifises the warping. We're left only with scaling.
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//The default settings still look nicer than original quake but not pre-april.
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//in the plus side, you can never see the junction glitches of the old warping. :)
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#ifdef Q3SHADERS
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if (fa->texinfo->texture->shader)
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{
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meshbuffer_t mb;
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mb.sortkey = 0;
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mb.infokey = 0;
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mb.dlightbits = 0;
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mb.entity = &r_worldentity;
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mb.shader = fa->texinfo->texture->shader;
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mb.fog = NULL;
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mb.mesh = fa->mesh;
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R_RenderMeshBuffer(&mb, false);
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return;
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}
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#endif
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if (r_waterlayers.value>=1)
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{
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qglEnable(GL_BLEND); //to ensure.
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qglMatrixMode(GL_TEXTURE);
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fa->mesh->colors_array=NULL;
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for (a=basealpha,l = 0; l < r_waterlayers.value; l++,a=a*4/6)
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{
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qglPushMatrix();
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qglColor4f(1, 1, 1, a);
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qglTranslatef (sin(cl.time+l*4) * 0.04f+cos(cl.time/2+l)*0.02f+cl.time/(64+l*8), cos(cl.time+l*4) * 0.06f+sin(cl.time/2+l)*0.02f+cl.time/(16+l*2), 0);
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GL_DrawAliasMesh(fa->mesh, fa->texinfo->texture->gl_texturenum);
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qglPopMatrix();
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}
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qglMatrixMode(GL_MODELVIEW);
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qglDisable(GL_BLEND); //to ensure.
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}
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else //dull (fast) single player
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{
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qglMatrixMode(GL_TEXTURE);
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qglPushMatrix();
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qglTranslatef (sin(cl.time) * 0.4f, cos(cl.time) * 0.06f, 0);
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fa->mesh->colors_array = NULL;
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GL_DrawAliasMesh(fa->mesh, fa->texinfo->texture->gl_texturenum);
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qglPopMatrix();
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qglMatrixMode(GL_MODELVIEW);
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}
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}
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/*
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=============
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EmitSkyPolys
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=============
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*/
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void EmitSkyPolys (msurface_t *fa)
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{
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}
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/*
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===============
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EmitBothSkyLayers
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Does a sky warp on the pre-fragmented glpoly_t chain
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This will be called for brushmodels, the world
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will have them chained together.
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===============
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*/
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void EmitBothSkyLayers (msurface_t *fa)
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{
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GL_DisableMultitexture();
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GL_Bind (solidskytexture);
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speedscale = cl.gametime*8;
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speedscale -= (int)speedscale & ~127 ;
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EmitSkyPolys (fa);
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qglEnable (GL_BLEND);
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GL_Bind (alphaskytexture);
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speedscale = cl.gametime*16;
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speedscale -= (int)speedscale & ~127 ;
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EmitSkyPolys (fa);
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qglDisable (GL_BLEND);
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}
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/*
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=================
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R_DrawSkyChain
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=================
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*/
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void R_DrawSkyBoxChain (msurface_t *s);
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void R_DrawSkyChain (msurface_t *s)
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{
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msurface_t *fa;
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GL_DisableMultitexture();
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#ifdef Q3SHADERS
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if (!solidskytexture&&!usingskybox)
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{
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int i;
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if (s->texinfo->texture->shader && s->texinfo->texture->shader->skydome)
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{
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for (i = 0; i < 6; i++)
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{
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skyboxtex[i] = s->texinfo->texture->shader->skydome->farbox_textures[i];
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}
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solidskytexture = 1;
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}
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}
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#endif
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if (r_fastsky.value||(!solidskytexture&&!usingskybox)) //this is for visability only... we'd otherwise not stoop this low (and this IS low)
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{
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int fc;
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qbyte *pal;
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fc = r_fastskycolour.value;
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if (fc > 255)
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fc = 255;
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if (fc < 0)
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fc = 0;
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pal = host_basepal+fc*3;
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qglDisable(GL_TEXTURE_2D);
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qglColor3f(pal[0]/255.0f, pal[1]/255.0f, pal[2]/255.0f);
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qglDisableClientState( GL_COLOR_ARRAY );
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for (fa=s ; fa ; fa=fa->texturechain)
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{
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qglVertexPointer(3, GL_FLOAT, 0, fa->mesh->xyz_array);
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qglDrawElements(GL_TRIANGLES, fa->mesh->numindexes, GL_UNSIGNED_INT, fa->mesh->indexes);
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}
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R_IBrokeTheArrays();
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qglColor3f(1, 1, 1);
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qglEnable(GL_TEXTURE_2D);
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return;
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}
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if (usingskybox)
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{
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R_DrawSkyBoxChain(s);
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return;
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}
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// if (usingskydome)
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{
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R_DrawSkySphere(s);
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return;
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}
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// used when gl_texsort is on
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GL_Bind(solidskytexture);
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speedscale = cl.gametime;
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speedscale += realtime - cl.gametimemark;
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speedscale*=8;
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speedscale -= (int)speedscale & ~127 ;
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for (fa=s ; fa ; fa=fa->texturechain)
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EmitSkyPolys (fa);
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qglEnable (GL_BLEND);
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GL_Bind (alphaskytexture);
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speedscale = cl.gametime;
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speedscale += realtime - cl.gametimemark;
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speedscale*=16;
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speedscale -= (int)speedscale & ~127 ;
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for (fa=s ; fa ; fa=fa->texturechain)
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EmitSkyPolys (fa);
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qglDisable (GL_BLEND);
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}
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/*
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=================================================================
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Quake 2 environment sky
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=================================================================
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*/
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/*
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==================
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R_LoadSkys
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==================
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*/
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static char *skyname_suffix[][6] = {
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{"px", "py", "nx", "ny", "pz", "nz"},
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{"posx", "posy", "negx", "negy", "posz", "negz"},
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{"rt", "bk", "lf", "ft", "up", "dn"},
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{"_px", "_py", "_nx", "_ny", "_pz", "_nz"},
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{"_posx", "_posy", "_negx", "_negy", "_posz", "_negz"},
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{"_rt", "_bk", "_lf", "_ft", "_up", "_dn"}
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};
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static char *skyname_pattern[] = {
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"%s_%s",
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"%s%s",
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"env/%s%s",
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"gfx/env/%s%s"
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};
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void R_LoadSkys (void)
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{
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int i;
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char name[MAX_QPATH];
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char *boxname;
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int p, s;
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if (*gl_skyboxname.string)
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boxname = gl_skyboxname.string; //user forced
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else
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boxname = defaultskybox;
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if (!*boxname)
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{ //wipe the box
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for (i=0 ; i<6 ; i++)
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skyboxtex[i] = 0;
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}
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else
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{
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for(;;)
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{
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for (i=0 ; i<6 ; i++)
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{
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for (p = 0; p < sizeof(skyname_pattern)/sizeof(skyname_pattern[0]); p++)
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{
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for (s = 0; s < sizeof(skyname_suffix)/sizeof(skyname_suffix[0]); s++)
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{
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_snprintf (name, sizeof(name), skyname_pattern[p], boxname, skyname_suffix[s][i]);
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skyboxtex[i] = Mod_LoadHiResTexture(name, NULL, false, false, true);
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if (skyboxtex[i])
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break;
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}
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if (skyboxtex[i])
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break;
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}
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if (!skyboxtex[i])
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break;
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qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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qglTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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}
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if (boxname != defaultskybox && i < 6 && *defaultskybox)
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{
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boxname = defaultskybox;
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continue;
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}
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break;
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}
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}
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reloadskybox = false;
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}
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qboolean GLR_CheckSky()
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{
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return true;
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}
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void GLR_SetSky(char *name, float rotate, vec3_t axis) //called from the client code, once per level
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{
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Q_strncpyz(defaultskybox, name, sizeof(defaultskybox));
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if (!*gl_skyboxname.string) //don't override a user's settings
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{
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reloadskybox = true;
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}
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skyrotate = rotate;
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VectorCopy(axis, skyaxis);
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}
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vec3_t skyclip[6] = {
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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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int c_sky;
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// 1 = s, 2 = t, 3 = 2048
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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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// {-1,2,3},
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// {1,2,-3}
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};
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// s = [0]/[2], t = [1]/[2]
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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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// {-1,2,3},
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// {1,2,-3}
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};
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float skymins[2][6], skymaxs[2][6];
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void DrawSkyPolygon (int nump, vec3_t vecs)
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{
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int i,j;
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vec3_t v, av;
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float s, t, dv;
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int axis;
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float *vp;
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c_sky++;
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// decide which face it maps to
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VectorCopy (vec3_origin, v);
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for (i=0, vp=vecs ; i<nump ; i++, vp+=3)
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{
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VectorAdd (vp, v, v);
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}
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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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{
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if (v[0] < 0)
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axis = 1;
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else
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axis = 0;
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}
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else if (av[1] > av[2] && av[1] > av[0])
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{
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if (v[1] < 0)
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axis = 3;
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else
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axis = 2;
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}
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else
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{
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if (v[2] < 0)
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axis = 5;
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else
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axis = 4;
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}
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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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if (j > 0)
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dv = vecs[j - 1];
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else
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dv = -vecs[-j - 1];
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if (dv < 0.001)
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continue; // don't divide by zero
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j = vec_to_st[axis][0];
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if (j < 0)
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s = -vecs[-j -1] / dv;
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else
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s = vecs[j-1] / dv;
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j = vec_to_st[axis][1];
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if (j < 0)
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t = -vecs[-j -1] / dv;
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else
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t = vecs[j-1] / dv;
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if (s < skymins[0][axis])
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skymins[0][axis] = s;
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if (t < skymins[1][axis])
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skymins[1][axis] = t;
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if (s > skymaxs[0][axis])
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skymaxs[0][axis] = s;
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if (t > skymaxs[1][axis])
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skymaxs[1][axis] = t;
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}
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}
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#define MAX_CLIP_VERTS 64
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void ClipSkyPolygon (int nump, vec3_t vecs, int stage)
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{
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float *norm;
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float *v;
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qboolean front, back;
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float d, e;
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float dists[MAX_CLIP_VERTS];
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int sides[MAX_CLIP_VERTS];
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vec3_t newv[2][MAX_CLIP_VERTS];
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int newc[2];
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int i, j;
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if (nump > MAX_CLIP_VERTS-2)
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Sys_Error ("ClipSkyPolygon: MAX_CLIP_VERTS");
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if (stage == 6)
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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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sides[i] = SIDE_ON;
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dists[i] = d;
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}
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if (!front || !back)
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{ // not clipped
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ClipSkyPolygon (nump, vecs, stage+1);
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return;
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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:
|
|
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_DrawSkyBoxChain (msurface_t *s)
|
|
{
|
|
msurface_t *fa;
|
|
|
|
int i;
|
|
vec3_t verts[MAX_CLIP_VERTS];
|
|
|
|
c_sky = 0;
|
|
|
|
// calculate vertex values for sky box
|
|
|
|
for (fa=s ; fa ; fa=fa->texturechain)
|
|
{
|
|
//triangulate
|
|
for (i=2 ; i<fa->mesh->numvertexes ; i++)
|
|
{
|
|
VectorSubtract (fa->mesh->xyz_array[0], r_origin, verts[0]);
|
|
VectorSubtract (fa->mesh->xyz_array[i-1], r_origin, verts[1]);
|
|
VectorSubtract (fa->mesh->xyz_array[i], r_origin, verts[2]);
|
|
ClipSkyPolygon (3, verts[0], 0);
|
|
}
|
|
}
|
|
|
|
R_DrawSkyBox (s);
|
|
}
|
|
|
|
#define skygridx 16
|
|
#define skygridx1 (skygridx + 1)
|
|
#define skygridxrecip (1.0f / (skygridx))
|
|
#define skygridy 16
|
|
#define skygridy1 (skygridy + 1)
|
|
#define skygridyrecip (1.0f / (skygridy))
|
|
#define skysphere_numverts (skygridx1 * skygridy1)
|
|
#define skysphere_numtriangles (skygridx * skygridy * 2)
|
|
static float skysphere_vertex3f[skysphere_numverts * 3];
|
|
static float skysphere_texcoord2f[skysphere_numverts * 2];
|
|
static int skysphere_element3i[skysphere_numtriangles * 3];
|
|
mesh_t skymesh;
|
|
|
|
int skymade;
|
|
|
|
static void skyspherecalc(int skytype)
|
|
{ //yes, this is basically stolen from DarkPlaces
|
|
int i, j, *e;
|
|
float a, b, x, ax, ay, v[3], length, *vertex3f, *texcoord2f;
|
|
float dx, dy, dz;
|
|
|
|
float texscale;
|
|
|
|
if (skymade == skytype)
|
|
return;
|
|
|
|
skymade = skytype;
|
|
|
|
if (skymade == 2)
|
|
texscale = 1/16.0f;
|
|
else
|
|
texscale = 1/1.5f;
|
|
|
|
texscale*=3;
|
|
|
|
skymesh.indexes = skysphere_element3i;
|
|
skymesh.st_array = (void*)skysphere_texcoord2f;
|
|
skymesh.lmst_array = (void*)skysphere_texcoord2f;
|
|
skymesh.xyz_array = (void*)skysphere_vertex3f;
|
|
|
|
skymesh.numindexes = skysphere_numtriangles * 3;
|
|
skymesh.numvertexes = skysphere_numverts;
|
|
|
|
dx = 16;
|
|
dy = 16;
|
|
dz = 16 / 3;
|
|
vertex3f = skysphere_vertex3f;
|
|
texcoord2f = skysphere_texcoord2f;
|
|
for (j = 0;j <= skygridy;j++)
|
|
{
|
|
a = j * skygridyrecip;
|
|
ax = cos(a * M_PI * 2);
|
|
ay = -sin(a * M_PI * 2);
|
|
for (i = 0;i <= skygridx;i++)
|
|
{
|
|
b = i * skygridxrecip;
|
|
x = cos((b + 0.5) * M_PI);
|
|
v[0] = ax*x * dx;
|
|
v[1] = ay*x * dy;
|
|
v[2] = -sin((b + 0.5) * M_PI) * dz;
|
|
length = texscale / sqrt(v[0]*v[0]+v[1]*v[1]+(v[2]*v[2]*9));
|
|
*texcoord2f++ = v[0] * length;
|
|
*texcoord2f++ = v[1] * length;
|
|
*vertex3f++ = v[0];
|
|
*vertex3f++ = v[1];
|
|
*vertex3f++ = v[2];
|
|
}
|
|
}
|
|
e = skysphere_element3i;
|
|
for (j = 0;j < skygridy;j++)
|
|
{
|
|
for (i = 0;i < skygridx;i++)
|
|
{
|
|
*e++ = j * skygridx1 + i;
|
|
*e++ = j * skygridx1 + i + 1;
|
|
*e++ = (j + 1) * skygridx1 + i;
|
|
|
|
*e++ = j * skygridx1 + i + 1;
|
|
*e++ = (j + 1) * skygridx1 + i + 1;
|
|
*e++ = (j + 1) * skygridx1 + i;
|
|
}
|
|
}
|
|
}
|
|
void R_DrawSkySphere (msurface_t *fa)
|
|
{
|
|
extern cvar_t gl_maxdist;
|
|
float time = cl.gametime+realtime-cl.gametimemark;
|
|
|
|
float skydist = gl_maxdist.value;
|
|
if (skydist<1)
|
|
skydist=gl_skyboxdist.value;
|
|
skydist/=16;
|
|
|
|
//scale sky sphere and place around view origin.
|
|
qglPushMatrix();
|
|
qglTranslatef(r_refdef.vieworg[0], r_refdef.vieworg[1], r_refdef.vieworg[2]);
|
|
qglScalef(skydist, skydist, skydist);
|
|
|
|
//draw in bulk? this is eeevil
|
|
//FIXME: We should use the skybox clipping code and split the sphere into 6 sides.
|
|
#ifdef Q3SHADERS
|
|
if (fa->texinfo->texture->shader)
|
|
{ //the shader route.
|
|
meshbuffer_t mb;
|
|
skyspherecalc(2);
|
|
mb.sortkey = 0;
|
|
mb.infokey = -1;
|
|
mb.dlightbits = 0;
|
|
mb.entity = &r_worldentity;
|
|
mb.shader = fa->texinfo->texture->shader;
|
|
mb.fog = NULL;
|
|
mb.mesh = &skymesh;
|
|
R_PushMesh(mb.mesh, mb.shader->features);
|
|
R_RenderMeshBuffer(&mb, false);
|
|
}
|
|
else
|
|
#endif
|
|
{ //the boring route.
|
|
skyspherecalc(1);
|
|
qglMatrixMode(GL_TEXTURE);
|
|
qglPushMatrix();
|
|
qglTranslatef(time*8/128, time*8/128, 0);
|
|
GL_DrawAliasMesh(&skymesh, solidskytexture);
|
|
qglColor4f(1,1,1,0.5);
|
|
qglEnable(GL_BLEND);
|
|
qglTranslatef(time*8/128, time*8/128, 0);
|
|
GL_DrawAliasMesh(&skymesh, alphaskytexture);
|
|
qglDisable(GL_BLEND);
|
|
qglPopMatrix();
|
|
qglMatrixMode(GL_MODELVIEW);
|
|
}
|
|
qglPopMatrix();
|
|
|
|
if (!cls.allow_skyboxes) //allow a little extra fps.
|
|
{//Draw the texture chain to only the depth buffer.
|
|
qglColorMask(0,0,0,0);
|
|
for (; fa; fa = fa->texturechain)
|
|
{
|
|
GL_DrawAliasMesh(fa->mesh, 0);
|
|
}
|
|
qglColorMask(1,1,1,1);
|
|
}
|
|
}
|
|
|
|
/*
|
|
==============
|
|
R_ClearSkyBox
|
|
==============
|
|
*/
|
|
void R_ClearSkyBox (void)
|
|
{
|
|
int i;
|
|
|
|
if (!cl.worldmodel) //allow skyboxes on non quake1 maps. (expect them even)
|
|
{
|
|
usingskybox = false;
|
|
return;
|
|
}
|
|
if (gl_skyboxname.modified)
|
|
{
|
|
gl_skyboxname.modified = false;
|
|
reloadskybox = true;
|
|
}
|
|
|
|
if (reloadskybox)
|
|
R_LoadSkys();
|
|
|
|
if (!skyboxtex[0] || !skyboxtex[1] || !skyboxtex[2] || !skyboxtex[3] || !skyboxtex[4] || !skyboxtex[5])
|
|
{
|
|
usingskybox = false;
|
|
return;
|
|
}
|
|
|
|
usingskybox = true;
|
|
|
|
for (i=0 ; i<6 ; i++)
|
|
{
|
|
skymins[0][i] = skymins[1][i] = 9999;
|
|
skymaxs[0][i] = skymaxs[1][i] = -9999;
|
|
}
|
|
}
|
|
|
|
void R_ForceSkyBox (void)
|
|
{
|
|
int i;
|
|
|
|
for (i=0 ; i<6 ; i++)
|
|
{
|
|
skymins[0][i] = skymins[1][i] = -1;
|
|
skymaxs[0][i] = skymaxs[1][i] = 1;
|
|
}
|
|
}
|
|
|
|
|
|
void MakeSkyVec (float s, float t, int axis)
|
|
{
|
|
vec3_t v, b;
|
|
int j, k;
|
|
float skydist = gl_skyboxdist.value;
|
|
|
|
if (r_shadows.value) //because r_shadows comes with an infinate depth perspective.
|
|
skydist*=20; //so we can put the distance at whatever distance needed.
|
|
|
|
b[0] = s*skydist;
|
|
b[1] = t*skydist;
|
|
b[2] = skydist;
|
|
|
|
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];
|
|
}
|
|
|
|
// 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;
|
|
qglTexCoord2f (s, t);
|
|
qglVertex3fv (v);
|
|
}
|
|
|
|
/*
|
|
==============
|
|
R_DrawSkyBox
|
|
==============
|
|
*/
|
|
int skytexorder[6] = {0,2,1,3,4,5};
|
|
void R_DrawSkyBox (msurface_t *s)
|
|
{
|
|
msurface_t *fa;
|
|
int i;
|
|
|
|
if (!usingskybox)
|
|
return;
|
|
|
|
if (skyrotate)
|
|
{
|
|
for (i=0 ; i<6 ; i++)
|
|
{
|
|
if (skymins[0][i] < skymaxs[0][i]
|
|
&& skymins[1][i] < skymaxs[1][i])
|
|
break;
|
|
|
|
skymins[0][i] = -1; //fully visible
|
|
skymins[1][i] = -1;
|
|
skymaxs[0][i] = 1;
|
|
skymaxs[1][i] = 1;
|
|
}
|
|
if (i == 6)
|
|
return; //can't see anything
|
|
for ( ; i<6 ; i++)
|
|
{
|
|
skymins[0][i] = -1;
|
|
skymins[1][i] = -1;
|
|
skymaxs[0][i] = 1;
|
|
skymaxs[1][i] = 1;
|
|
}
|
|
}
|
|
|
|
qglPushMatrix ();
|
|
qglTranslatef (r_origin[0], r_origin[1], r_origin[2]);
|
|
if (skyrotate)
|
|
qglRotatef (cl.time * skyrotate, skyaxis[0], skyaxis[1], skyaxis[2]);
|
|
|
|
for (i=0 ; i<6 ; i++)
|
|
{
|
|
if (skymins[0][i] >= skymaxs[0][i]
|
|
|| skymins[1][i] >= skymaxs[1][i])
|
|
continue;
|
|
|
|
GL_Bind (skyboxtex[skytexorder[i]]);
|
|
|
|
qglBegin (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);
|
|
qglEnd ();
|
|
}
|
|
|
|
qglPopMatrix ();
|
|
|
|
if (!cls.allow_skyboxes && s) //allow a little extra fps.
|
|
{
|
|
//write the depth correctly
|
|
qglColorMask(0, 0, 0, 0); //depth only.
|
|
for (fa = s; fa; fa = fa->texturechain)
|
|
GL_DrawAliasMesh(fa->mesh, 1);
|
|
|
|
qglColorMask(1, 1, 1, 1);
|
|
}
|
|
}
|
|
|
|
|
|
|
|
//===============================================================
|
|
|
|
/*
|
|
=============
|
|
R_InitSky
|
|
|
|
A sky texture is 256*128, with the right side being a masked overlay
|
|
==============
|
|
*/
|
|
void GLR_InitSky (texture_t *mt)
|
|
{
|
|
int i, j, p;
|
|
qbyte *src;
|
|
unsigned trans[128*128];
|
|
unsigned transpix;
|
|
int r, g, b;
|
|
unsigned *rgba;
|
|
char name[MAX_QPATH];
|
|
|
|
src = (qbyte *)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_8to24rgbtable[p];
|
|
trans[(i*128) + j] = *rgba;
|
|
r += ((qbyte *)rgba)[0];
|
|
g += ((qbyte *)rgba)[1];
|
|
b += ((qbyte *)rgba)[2];
|
|
}
|
|
|
|
((qbyte *)&transpix)[0] = r/(128*128);
|
|
((qbyte *)&transpix)[1] = g/(128*128);
|
|
((qbyte *)&transpix)[2] = b/(128*128);
|
|
((qbyte *)&transpix)[3] = 0;
|
|
|
|
sprintf(name, "%s_solid", mt->name);
|
|
Q_strlwr(name);
|
|
solidskytexture = Mod_LoadReplacementTexture(name, NULL, true, false, true);
|
|
if (!solidskytexture)
|
|
solidskytexture = GL_LoadTexture32(name, 128, 128, trans, true, false);
|
|
/*
|
|
if (!solidskytexture)
|
|
solidskytexture = texture_extension_number++;
|
|
|
|
GL_Bind (solidskytexture );
|
|
glTexImage2D (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_8to24rgbtable[p];
|
|
}
|
|
|
|
sprintf(name, "%s_trans", mt->name);
|
|
Q_strlwr(name);
|
|
alphaskytexture = Mod_LoadReplacementTexture(name, NULL, true, true, true);
|
|
if (!alphaskytexture)
|
|
alphaskytexture = GL_LoadTexture32(name, 128, 128, trans, true, true);
|
|
/*
|
|
if (!alphaskytexture)
|
|
alphaskytexture = texture_extension_number++;
|
|
GL_Bind(alphaskytexture);
|
|
glTexImage2D (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);
|
|
*/
|
|
}
|
|
#endif
|