mirror of
https://github.com/Shpoike/Quakespasm.git
synced 2025-02-13 07:21:31 +00:00
9c6f93eb8a
To make this work with the drawing order we use in gl_rmain (world excluding water, opaque ents, world water, transparent ents), I made each texture_t have two texture chains, one for world and one for bmodels. This way they can be cleared during entity drawing without having to regenerate the world ones. Other than this the changes are mostly minor adjustments to the R_DrawTextureChains_* functions so they can work for things other than the world. git-svn-id: svn://svn.code.sf.net/p/quakespasm/code/trunk/quakespasm@979 af15c1b1-3010-417e-b628-4374ebc0bcbd
1010 lines
21 KiB
C
1010 lines
21 KiB
C
/*
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Copyright (C) 1996-2001 Id Software, Inc.
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Copyright (C) 2002-2009 John Fitzgibbons and others
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Copyright (C) 2007-2008 Kristian Duske
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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_sky.c
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#include "quakedef.h"
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#define MAX_CLIP_VERTS 64
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float Fog_GetDensity(void);
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float *Fog_GetColor(void);
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extern qmodel_t *loadmodel;
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extern int rs_skypolys; //for r_speeds readout
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extern int rs_skypasses; //for r_speeds readout
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float skyflatcolor[3];
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float skymins[2][6], skymaxs[2][6];
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char skybox_name[32] = ""; //name of current skybox, or "" if no skybox
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gltexture_t *skybox_textures[6];
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gltexture_t *solidskytexture, *alphaskytexture;
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extern cvar_t gl_farclip;
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cvar_t r_fastsky = {"r_fastsky", "0", CVAR_NONE};
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cvar_t r_sky_quality = {"r_sky_quality", "12", CVAR_NONE};
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cvar_t r_skyalpha = {"r_skyalpha", "1", CVAR_NONE};
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cvar_t r_skyfog = {"r_skyfog","0.5",CVAR_NONE};
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int skytexorder[6] = {0,2,1,3,4,5}; //for skybox
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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 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}, // straight up
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{2,-1,-3} // straight down
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};
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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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};
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//==============================================================================
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//
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// INIT
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//
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//==============================================================================
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/*
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=============
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Sky_LoadTexture
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A sky texture is 256*128, with the left side being a masked overlay
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==============
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*/
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void Sky_LoadTexture (texture_t *mt)
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{
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char texturename[64];
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int i, j, p, r, g, b, count;
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byte *src;
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static byte front_data[128*128]; //FIXME: Hunk_Alloc
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static byte back_data[128*128]; //FIXME: Hunk_Alloc
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unsigned *rgba;
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src = (byte *)mt + mt->offsets[0];
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// extract back layer and upload
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for (i=0 ; i<128 ; i++)
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for (j=0 ; j<128 ; j++)
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back_data[(i*128) + j] = src[i*256 + j + 128];
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q_snprintf(texturename, sizeof(texturename), "%s:%s_back", loadmodel->name, mt->name);
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solidskytexture = TexMgr_LoadImage (loadmodel, texturename, 128, 128, SRC_INDEXED, back_data, "", (src_offset_t)back_data, TEXPREF_NONE);
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// extract front layer and upload
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for (i=0 ; i<128 ; i++)
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for (j=0 ; j<128 ; j++)
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{
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front_data[(i*128) + j] = src[i*256 + j];
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if (front_data[(i*128) + j] == 0)
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front_data[(i*128) + j] = 255;
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}
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q_snprintf(texturename, sizeof(texturename), "%s:%s_front", loadmodel->name, mt->name);
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alphaskytexture = TexMgr_LoadImage (loadmodel, texturename, 128, 128, SRC_INDEXED, front_data, "", (src_offset_t)front_data, TEXPREF_ALPHA);
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// calculate r_fastsky color based on average of all opaque foreground colors
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r = g = b = count = 0;
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for (i=0 ; i<128 ; i++)
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for (j=0 ; j<128 ; j++)
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{
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p = src[i*256 + j];
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if (p != 0)
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{
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rgba = &d_8to24table[p];
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r += ((byte *)rgba)[0];
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g += ((byte *)rgba)[1];
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b += ((byte *)rgba)[2];
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count++;
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}
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}
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skyflatcolor[0] = (float)r/(count*255);
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skyflatcolor[1] = (float)g/(count*255);
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skyflatcolor[2] = (float)b/(count*255);
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}
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/*
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==================
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Sky_LoadSkyBox
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==================
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*/
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const char *suf[6] = {"rt", "bk", "lf", "ft", "up", "dn"};
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void Sky_LoadSkyBox (const char *name)
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{
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int i, mark, width, height;
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char filename[MAX_OSPATH];
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byte *data;
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qboolean nonefound = true;
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if (strcmp(skybox_name, name) == 0)
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return; //no change
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//purge old textures
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for (i=0; i<6; i++)
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{
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if (skybox_textures[i] && skybox_textures[i] != notexture)
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TexMgr_FreeTexture (skybox_textures[i]);
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skybox_textures[i] = NULL;
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}
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//turn off skybox if sky is set to ""
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if (name[0] == 0)
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{
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skybox_name[0] = 0;
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return;
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}
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//load textures
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for (i=0; i<6; i++)
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{
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mark = Hunk_LowMark ();
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q_snprintf (filename, sizeof(filename), "gfx/env/%s%s", name, suf[i]);
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data = Image_LoadImage (filename, &width, &height);
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if (data)
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{
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skybox_textures[i] = TexMgr_LoadImage (cl.worldmodel, filename, width, height, SRC_RGBA, data, filename, 0, TEXPREF_NONE);
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nonefound = false;
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}
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else
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{
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Con_Printf ("Couldn't load %s\n", filename);
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skybox_textures[i] = notexture;
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}
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Hunk_FreeToLowMark (mark);
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}
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if (nonefound) // go back to scrolling sky if skybox is totally missing
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{
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for (i=0; i<6; i++)
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{
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if (skybox_textures[i] && skybox_textures[i] != notexture)
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TexMgr_FreeTexture (skybox_textures[i]);
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skybox_textures[i] = NULL;
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}
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skybox_name[0] = 0;
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return;
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}
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strcpy(skybox_name, name);
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}
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/*
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=================
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Sky_NewMap
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=================
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*/
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void Sky_NewMap (void)
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{
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char key[128], value[4096];
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const char *data;
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int i;
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//
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// initially no sky
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//
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skybox_name[0] = 0;
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for (i=0; i<6; i++)
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skybox_textures[i] = NULL;
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//
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// read worldspawn (this is so ugly, and shouldn't it be done on the server?)
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//
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data = cl.worldmodel->entities;
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if (!data)
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return; //FIXME: how could this possibly ever happen? -- if there's no
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// worldspawn then the sever wouldn't send the loadmap message to the client
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data = COM_Parse(data);
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if (!data) //should never happen
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return; // error
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if (com_token[0] != '{') //should never happen
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return; // error
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while (1)
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{
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data = COM_Parse(data);
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if (!data)
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return; // error
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if (com_token[0] == '}')
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break; // end of worldspawn
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if (com_token[0] == '_')
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strcpy(key, com_token + 1);
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else
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strcpy(key, com_token);
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while (key[strlen(key)-1] == ' ') // remove trailing spaces
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key[strlen(key)-1] = 0;
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data = COM_Parse(data);
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if (!data)
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return; // error
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strcpy(value, com_token);
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if (!strcmp("sky", key))
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Sky_LoadSkyBox(value);
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#if 1 //also accept non-standard keys
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else if (!strcmp("skyname", key)) //half-life
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Sky_LoadSkyBox(value);
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else if (!strcmp("qlsky", key)) //quake lives
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Sky_LoadSkyBox(value);
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#endif
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}
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}
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/*
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=================
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Sky_SkyCommand_f
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=================
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*/
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void Sky_SkyCommand_f (void)
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{
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switch (Cmd_Argc())
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{
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case 1:
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Con_Printf("\"sky\" is \"%s\"\n", skybox_name);
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break;
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case 2:
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Sky_LoadSkyBox(Cmd_Argv(1));
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break;
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default:
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Con_Printf("usage: sky <skyname>\n");
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}
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}
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/*
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=============
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Sky_Init
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=============
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*/
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void Sky_Init (void)
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{
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int i;
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Cvar_RegisterVariable (&r_fastsky);
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Cvar_RegisterVariable (&r_sky_quality);
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Cvar_RegisterVariable (&r_skyalpha);
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Cvar_RegisterVariable (&r_skyfog);
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Cmd_AddCommand ("sky",Sky_SkyCommand_f);
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for (i=0; i<6; i++)
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skybox_textures[i] = NULL;
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}
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//==============================================================================
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//
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// PROCESS SKY SURFS
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//
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//==============================================================================
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/*
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=================
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Sky_ProjectPoly
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update sky bounds
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=================
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*/
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void Sky_ProjectPoly (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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// 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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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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/*
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=================
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Sky_ClipPoly
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=================
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*/
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void Sky_ClipPoly (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 ("Sky_ClipPoly: MAX_CLIP_VERTS");
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if (stage == 6) // fully clipped
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{
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Sky_ProjectPoly (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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Sky_ClipPoly (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:
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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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Sky_ClipPoly (newc[0], newv[0][0], stage+1);
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Sky_ClipPoly (newc[1], newv[1][0], stage+1);
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}
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/*
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================
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Sky_ProcessPoly
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================
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*/
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void Sky_ProcessPoly (glpoly_t *p)
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{
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int i;
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vec3_t verts[MAX_CLIP_VERTS];
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//draw it
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DrawGLPoly(p);
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rs_brushpasses++;
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//update sky bounds
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if (!r_fastsky.value)
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{
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for (i=0 ; i<p->numverts ; i++)
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VectorSubtract (p->verts[i], r_origin, verts[i]);
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Sky_ClipPoly (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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Sky_ProcessTextureChains -- handles sky polys in world model
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================
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*/
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void Sky_ProcessTextureChains (void)
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{
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int i;
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msurface_t *s;
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texture_t *t;
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if (!r_drawworld_cheatsafe)
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return;
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for (i=0 ; i<cl.worldmodel->numtextures ; i++)
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{
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t = cl.worldmodel->textures[i];
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if (!t || !t->texturechains[chain_world] || !(t->texturechains[chain_world]->flags & SURF_DRAWSKY))
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continue;
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for (s = t->texturechains[chain_world]; s; s = s->texturechain)
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if (!s->culled)
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Sky_ProcessPoly (s->polys);
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}
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}
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/*
|
|
================
|
|
Sky_ProcessEntities -- handles sky polys on brush models
|
|
================
|
|
*/
|
|
void Sky_ProcessEntities (void)
|
|
{
|
|
entity_t *e;
|
|
msurface_t *s;
|
|
glpoly_t *p;
|
|
int i,j,k,mark;
|
|
float dot;
|
|
qboolean rotated;
|
|
vec3_t temp, forward, right, up;
|
|
|
|
if (!r_drawentities.value)
|
|
return;
|
|
|
|
for (i=0 ; i<cl_numvisedicts ; i++)
|
|
{
|
|
e = cl_visedicts[i];
|
|
|
|
if (e->model->type != mod_brush)
|
|
continue;
|
|
|
|
if (R_CullModelForEntity(e))
|
|
continue;
|
|
|
|
if (e->alpha == ENTALPHA_ZERO)
|
|
continue;
|
|
|
|
VectorSubtract (r_refdef.vieworg, e->origin, modelorg);
|
|
if (e->angles[0] || e->angles[1] || e->angles[2])
|
|
{
|
|
rotated = true;
|
|
AngleVectors (e->angles, forward, right, up);
|
|
VectorCopy (modelorg, temp);
|
|
modelorg[0] = DotProduct (temp, forward);
|
|
modelorg[1] = -DotProduct (temp, right);
|
|
modelorg[2] = DotProduct (temp, up);
|
|
}
|
|
else
|
|
rotated = false;
|
|
|
|
s = &e->model->surfaces[e->model->firstmodelsurface];
|
|
|
|
for (j=0 ; j<e->model->nummodelsurfaces ; j++, s++)
|
|
{
|
|
if (s->flags & SURF_DRAWSKY)
|
|
{
|
|
dot = DotProduct (modelorg, s->plane->normal) - s->plane->dist;
|
|
if (((s->flags & SURF_PLANEBACK) && (dot < -BACKFACE_EPSILON)) ||
|
|
(!(s->flags & SURF_PLANEBACK) && (dot > BACKFACE_EPSILON)))
|
|
{
|
|
//copy the polygon and translate manually, since Sky_ProcessPoly needs it to be in world space
|
|
mark = Hunk_LowMark();
|
|
p = (glpoly_t *) Hunk_Alloc (sizeof(*s->polys)); //FIXME: don't allocate for each poly
|
|
p->numverts = s->polys->numverts;
|
|
for (k=0; k<p->numverts; k++)
|
|
{
|
|
if (rotated)
|
|
{
|
|
p->verts[k][0] = e->origin[0] + s->polys->verts[k][0] * forward[0]
|
|
- s->polys->verts[k][1] * right[0]
|
|
+ s->polys->verts[k][2] * up[0];
|
|
p->verts[k][1] = e->origin[1] + s->polys->verts[k][0] * forward[1]
|
|
- s->polys->verts[k][1] * right[1]
|
|
+ s->polys->verts[k][2] * up[1];
|
|
p->verts[k][2] = e->origin[2] + s->polys->verts[k][0] * forward[2]
|
|
- s->polys->verts[k][1] * right[2]
|
|
+ s->polys->verts[k][2] * up[2];
|
|
}
|
|
else
|
|
VectorAdd(s->polys->verts[k], e->origin, p->verts[k]);
|
|
}
|
|
Sky_ProcessPoly (p);
|
|
Hunk_FreeToLowMark (mark);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
//==============================================================================
|
|
//
|
|
// RENDER SKYBOX
|
|
//
|
|
//==============================================================================
|
|
|
|
/*
|
|
==============
|
|
Sky_EmitSkyBoxVertex
|
|
==============
|
|
*/
|
|
void Sky_EmitSkyBoxVertex (float s, float t, int axis)
|
|
{
|
|
vec3_t v, b;
|
|
int j, k;
|
|
float w, h;
|
|
|
|
b[0] = s * gl_farclip.value / sqrt(3.0);
|
|
b[1] = t * gl_farclip.value / sqrt(3.0);
|
|
b[2] = gl_farclip.value / sqrt(3.0);
|
|
|
|
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];
|
|
}
|
|
|
|
// convert from range [-1,1] to [0,1]
|
|
s = (s+1)*0.5;
|
|
t = (t+1)*0.5;
|
|
|
|
// avoid bilerp seam
|
|
w = skybox_textures[skytexorder[axis]]->width;
|
|
h = skybox_textures[skytexorder[axis]]->height;
|
|
s = s * (w-1)/w + 0.5/w;
|
|
t = t * (h-1)/h + 0.5/h;
|
|
|
|
t = 1.0 - t;
|
|
glTexCoord2f (s, t);
|
|
glVertex3fv (v);
|
|
}
|
|
|
|
/*
|
|
==============
|
|
Sky_DrawSkyBox
|
|
|
|
FIXME: eliminate cracks by adding an extra vert on tjuncs
|
|
==============
|
|
*/
|
|
void Sky_DrawSkyBox (void)
|
|
{
|
|
int i;
|
|
|
|
for (i=0 ; i<6 ; i++)
|
|
{
|
|
if (skymins[0][i] >= skymaxs[0][i] || skymins[1][i] >= skymaxs[1][i])
|
|
continue;
|
|
|
|
GL_Bind (skybox_textures[skytexorder[i]]);
|
|
|
|
#if 1 //FIXME: this is to avoid tjunctions until i can do it the right way
|
|
skymins[0][i] = -1;
|
|
skymins[1][i] = -1;
|
|
skymaxs[0][i] = 1;
|
|
skymaxs[1][i] = 1;
|
|
#endif
|
|
glBegin (GL_QUADS);
|
|
Sky_EmitSkyBoxVertex (skymins[0][i], skymins[1][i], i);
|
|
Sky_EmitSkyBoxVertex (skymins[0][i], skymaxs[1][i], i);
|
|
Sky_EmitSkyBoxVertex (skymaxs[0][i], skymaxs[1][i], i);
|
|
Sky_EmitSkyBoxVertex (skymaxs[0][i], skymins[1][i], i);
|
|
glEnd ();
|
|
|
|
rs_skypolys++;
|
|
rs_skypasses++;
|
|
|
|
if (Fog_GetDensity() > 0 && r_skyfog.value > 0)
|
|
{
|
|
float *c;
|
|
|
|
c = Fog_GetColor();
|
|
glEnable (GL_BLEND);
|
|
glDisable (GL_TEXTURE_2D);
|
|
glColor4f (c[0],c[1],c[2], CLAMP(0.0,r_skyfog.value,1.0));
|
|
|
|
glBegin (GL_QUADS);
|
|
Sky_EmitSkyBoxVertex (skymins[0][i], skymins[1][i], i);
|
|
Sky_EmitSkyBoxVertex (skymins[0][i], skymaxs[1][i], i);
|
|
Sky_EmitSkyBoxVertex (skymaxs[0][i], skymaxs[1][i], i);
|
|
Sky_EmitSkyBoxVertex (skymaxs[0][i], skymins[1][i], i);
|
|
glEnd ();
|
|
|
|
glColor3f (1, 1, 1);
|
|
glEnable (GL_TEXTURE_2D);
|
|
glDisable (GL_BLEND);
|
|
|
|
rs_skypasses++;
|
|
}
|
|
}
|
|
}
|
|
|
|
//==============================================================================
|
|
//
|
|
// RENDER CLOUDS
|
|
//
|
|
//==============================================================================
|
|
|
|
/*
|
|
==============
|
|
Sky_SetBoxVert
|
|
==============
|
|
*/
|
|
void Sky_SetBoxVert (float s, float t, int axis, vec3_t v)
|
|
{
|
|
vec3_t b;
|
|
int j, k;
|
|
|
|
b[0] = s * gl_farclip.value / sqrt(3.0);
|
|
b[1] = t * gl_farclip.value / sqrt(3.0);
|
|
b[2] = gl_farclip.value / sqrt(3.0);
|
|
|
|
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];
|
|
}
|
|
}
|
|
|
|
/*
|
|
=============
|
|
Sky_GetTexCoord
|
|
=============
|
|
*/
|
|
void Sky_GetTexCoord (vec3_t v, float speed, float *s, float *t)
|
|
{
|
|
vec3_t dir;
|
|
float length, scroll;
|
|
|
|
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;
|
|
|
|
scroll = cl.time*speed;
|
|
scroll -= (int)scroll & ~127;
|
|
|
|
*s = (scroll + dir[0] * length) * (1.0/128);
|
|
*t = (scroll + dir[1] * length) * (1.0/128);
|
|
}
|
|
|
|
/*
|
|
===============
|
|
Sky_DrawFaceQuad
|
|
===============
|
|
*/
|
|
void Sky_DrawFaceQuad (glpoly_t *p)
|
|
{
|
|
float s, t;
|
|
float *v;
|
|
int i;
|
|
|
|
if (gl_mtexable && r_skyalpha.value >= 1.0)
|
|
{
|
|
GL_Bind (solidskytexture);
|
|
GL_EnableMultitexture();
|
|
GL_Bind (alphaskytexture);
|
|
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_DECAL);
|
|
|
|
glBegin (GL_QUADS);
|
|
for (i=0, v=p->verts[0] ; i<4 ; i++, v+=VERTEXSIZE)
|
|
{
|
|
Sky_GetTexCoord (v, 8, &s, &t);
|
|
GL_MTexCoord2fFunc (TEXTURE0, s, t);
|
|
Sky_GetTexCoord (v, 16, &s, &t);
|
|
GL_MTexCoord2fFunc (TEXTURE1, s, t);
|
|
glVertex3fv (v);
|
|
}
|
|
glEnd ();
|
|
|
|
GL_DisableMultitexture();
|
|
|
|
rs_skypolys++;
|
|
rs_skypasses++;
|
|
}
|
|
else
|
|
{
|
|
GL_Bind (solidskytexture);
|
|
|
|
if (r_skyalpha.value < 1.0)
|
|
glColor3f (1, 1, 1);
|
|
|
|
glBegin (GL_QUADS);
|
|
for (i=0, v=p->verts[0] ; i<4 ; i++, v+=VERTEXSIZE)
|
|
{
|
|
Sky_GetTexCoord (v, 8, &s, &t);
|
|
glTexCoord2f (s, t);
|
|
glVertex3fv (v);
|
|
}
|
|
glEnd ();
|
|
|
|
GL_Bind (alphaskytexture);
|
|
glEnable (GL_BLEND);
|
|
|
|
if (r_skyalpha.value < 1.0)
|
|
glColor4f (1, 1, 1, r_skyalpha.value);
|
|
|
|
glBegin (GL_QUADS);
|
|
for (i=0, v=p->verts[0] ; i<4 ; i++, v+=VERTEXSIZE)
|
|
{
|
|
Sky_GetTexCoord (v, 16, &s, &t);
|
|
glTexCoord2f (s, t);
|
|
glVertex3fv (v);
|
|
}
|
|
glEnd ();
|
|
|
|
glDisable (GL_BLEND);
|
|
|
|
rs_skypolys++;
|
|
rs_skypasses += 2;
|
|
}
|
|
|
|
if (Fog_GetDensity() > 0 && r_skyfog.value > 0)
|
|
{
|
|
float *c;
|
|
|
|
c = Fog_GetColor();
|
|
glEnable (GL_BLEND);
|
|
glDisable (GL_TEXTURE_2D);
|
|
glColor4f (c[0],c[1],c[2], CLAMP(0.0,r_skyfog.value,1.0));
|
|
|
|
glBegin (GL_QUADS);
|
|
for (i=0, v=p->verts[0] ; i<4 ; i++, v+=VERTEXSIZE)
|
|
glVertex3fv (v);
|
|
glEnd ();
|
|
|
|
glColor3f (1, 1, 1);
|
|
glEnable (GL_TEXTURE_2D);
|
|
glDisable (GL_BLEND);
|
|
|
|
rs_skypasses++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
==============
|
|
Sky_DrawFace
|
|
==============
|
|
*/
|
|
|
|
void Sky_DrawFace (int axis)
|
|
{
|
|
glpoly_t *p;
|
|
vec3_t verts[4];
|
|
int i, j, start;
|
|
float di,qi,dj,qj;
|
|
vec3_t vup, vright, temp, temp2;
|
|
|
|
Sky_SetBoxVert(-1.0, -1.0, axis, verts[0]);
|
|
Sky_SetBoxVert(-1.0, 1.0, axis, verts[1]);
|
|
Sky_SetBoxVert(1.0, 1.0, axis, verts[2]);
|
|
Sky_SetBoxVert(1.0, -1.0, axis, verts[3]);
|
|
|
|
start = Hunk_LowMark ();
|
|
p = (glpoly_t *) Hunk_Alloc(sizeof(glpoly_t));
|
|
|
|
VectorSubtract(verts[2],verts[3],vup);
|
|
VectorSubtract(verts[2],verts[1],vright);
|
|
|
|
di = q_max((int)r_sky_quality.value, 1);
|
|
qi = 1.0 / di;
|
|
dj = (axis < 4) ? di*2 : di; //subdivide vertically more than horizontally on skybox sides
|
|
qj = 1.0 / dj;
|
|
|
|
for (i=0; i<di; i++)
|
|
{
|
|
for (j=0; j<dj; j++)
|
|
{
|
|
if (i*qi < skymins[0][axis]/2+0.5 - qi || i*qi > skymaxs[0][axis]/2+0.5 ||
|
|
j*qj < skymins[1][axis]/2+0.5 - qj || j*qj > skymaxs[1][axis]/2+0.5)
|
|
continue;
|
|
|
|
//if (i&1 ^ j&1) continue; //checkerboard test
|
|
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]);
|
|
|
|
Sky_DrawFaceQuad (p);
|
|
}
|
|
}
|
|
Hunk_FreeToLowMark (start);
|
|
}
|
|
|
|
/*
|
|
==============
|
|
Sky_DrawSkyLayers
|
|
|
|
draws the old-style scrolling cloud layers
|
|
==============
|
|
*/
|
|
void Sky_DrawSkyLayers (void)
|
|
{
|
|
int i;
|
|
|
|
if (r_skyalpha.value < 1.0)
|
|
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
|
|
|
|
for (i=0 ; i<6 ; i++)
|
|
if (skymins[0][i] < skymaxs[0][i] && skymins[1][i] < skymaxs[1][i])
|
|
Sky_DrawFace (i);
|
|
|
|
if (r_skyalpha.value < 1.0)
|
|
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
|
|
}
|
|
|
|
/*
|
|
==============
|
|
Sky_DrawSky
|
|
|
|
called once per frame before drawing anything else
|
|
==============
|
|
*/
|
|
void Sky_DrawSky (void)
|
|
{
|
|
int i;
|
|
|
|
//in these special render modes, the sky faces are handled in the normal world/brush renderer
|
|
if (r_drawflat_cheatsafe || r_lightmap_cheatsafe )
|
|
return;
|
|
|
|
//
|
|
// reset sky bounds
|
|
//
|
|
for (i=0 ; i<6 ; i++)
|
|
{
|
|
skymins[0][i] = skymins[1][i] = 9999;
|
|
skymaxs[0][i] = skymaxs[1][i] = -9999;
|
|
}
|
|
|
|
//
|
|
// process world and bmodels: draw flat-shaded sky surfs, and update skybounds
|
|
//
|
|
Fog_DisableGFog ();
|
|
glDisable (GL_TEXTURE_2D);
|
|
if (Fog_GetDensity() > 0)
|
|
glColor3fv (Fog_GetColor());
|
|
else
|
|
glColor3fv (skyflatcolor);
|
|
Sky_ProcessTextureChains ();
|
|
Sky_ProcessEntities ();
|
|
glColor3f (1, 1, 1);
|
|
glEnable (GL_TEXTURE_2D);
|
|
|
|
//
|
|
// render slow sky: cloud layers or skybox
|
|
//
|
|
if (!r_fastsky.value && !(Fog_GetDensity() > 0 && r_skyfog.value >= 1))
|
|
{
|
|
glDepthFunc(GL_GEQUAL);
|
|
glDepthMask(0);
|
|
|
|
if (skybox_name[0])
|
|
Sky_DrawSkyBox ();
|
|
else
|
|
Sky_DrawSkyLayers();
|
|
|
|
glDepthMask(1);
|
|
glDepthFunc(GL_LEQUAL);
|
|
}
|
|
|
|
Fog_EnableGFog ();
|
|
}
|