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Diffstat (limited to 'source/sw_sky.c')
| -rw-r--r-- | source/sw_sky.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/source/sw_sky.c b/source/sw_sky.c new file mode 100644 index 0000000..233bb10 --- /dev/null +++ b/source/sw_sky.c @@ -0,0 +1,178 @@ +/* +Copyright (C) 1997-2001 Id Software, Inc. +Copyright (C) 2008 Andrey Nazarov + +This program is free software; you can redistribute it and/or +modify it under the terms of the GNU General Public License +as published by the Free Software Foundation; either version 2 +of the License, or (at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. + +See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +*/ + +#include "sw_local.h" + +//static float sky_rotate; +//static vec3_t sky_axis; + +static int r_skyframe; +static mface_t r_skyfaces[6]; +static cplane_t r_skyplanes[6]; +static mtexinfo_t r_skytexinfo[6]; +static mvertex_t r_skyverts[8]; +static medge_t r_skyedges[12]; +static msurfedge_t r_skysurfedges[24]; + +// 3dstudio environment map names +static const char r_skysidenames[6][3] = { "rt", "bk", "lf", "ft", "up", "dn" }; +static const int r_skysideimage[6] = { 5, 2, 4, 1, 0, 3 }; + +// I just copied this data from a box map... +static const int box_planes[12] = { + 2,-128, 0,-128, 2,128, 1,128, 0,128, 1,-128 +}; +static const int box_surfedges[24] = { + 1,2,3,4, 1,5,6,7, 8,9,6,10, 2,7,9,11, 12,3,11,8, 12,10,5,4 +}; +static const int box_surfverts[24] = { + 0,0,0,0, 1,0,0,0, 0,0,1,0, 1,1,1,0, 0,1,1,1, 1,1,1,1 +}; +static const int box_edges[24] = { + 1,2, 2,3, 3,4, 4,1, 1,5, 5,6, 6,2, 7,8, 8,6, 5,7, 8,3, 7,4 +}; +static const int box_flags[6] = { + 0, 0, 1, 1, 1, 0 +}; +static const vec3_t box_axis[6][2] = { + { {0,-1,0}, {-1,0,0} }, + { {0,1,0}, {0,0,-1} }, + { {0,-1,0}, {1,0,0} }, + { {1,0,0}, {0,0,-1} }, + { {0,-1,0}, {0,0,-1} }, + { {-1,0,0}, {0,0,-1} } +}; +static const vec3_t box_verts[8] = { + {-1,-1,-1}, + {-1,1,-1}, + {1,1,-1}, + {1,-1,-1}, + {-1,-1,1}, + {-1,1,1}, + {1,-1,1}, + {1,1,1} +}; + +/* +================ +R_InitSkyBox +================ +*/ +void R_InitSkyBox( void ) { + int i; + + for( i = 0; i < 6; i++ ) { + r_skyplanes[i].normal[box_planes[i*2]] = 1; + r_skyplanes[i].dist = box_planes[i*2+1]; + + VectorCopy( box_axis[i][0], r_skytexinfo[i].axis[0] ); + VectorCopy( box_axis[i][1], r_skytexinfo[i].axis[1] ); + + r_skyfaces[i].plane = &r_skyplanes[i]; + r_skyfaces[i].drawflags = box_flags[i] | DSURF_SKY; + r_skyfaces[i].numsurfedges = 4; + r_skyfaces[i].firstsurfedge = &r_skysurfedges[i*4]; + r_skyfaces[i].texinfo = &r_skytexinfo[i]; + r_skyfaces[i].texturemins[0] = -128; + r_skyfaces[i].texturemins[1] = -128; + r_skyfaces[i].extents[0] = 256; + r_skyfaces[i].extents[1] = 256; + } + + for( i = 0; i < 24; i++ ) { + r_skysurfedges[i].edge = &r_skyedges[box_surfedges[i]-1]; + r_skysurfedges[i].vert = box_surfverts[i]; + } + + for( i = 0; i < 12; i++ ) { + r_skyedges[i].v[0] = &r_skyverts[box_edges[i*2+0]-1]; + r_skyedges[i].v[1] = &r_skyverts[box_edges[i*2+1]-1]; + r_skyedges[i].cachededgeoffset = 0; + } +} + +/* +================ +R_EmitSkyBox +================ +*/ +void R_EmitSkyBox( void ) { + int i, j; + int oldkey; + + if (insubmodel) + return; // submodels should never have skies + if (r_skyframe == r_framecount) + return; // already set this frame + + r_skyframe = r_framecount; + + // set the eight fake vertexes + for( i = 0; i < 8; i++ ) + for( j = 0; j < 3; j++ ) + r_skyverts[i].point[j] = r_origin[j] + box_verts[i][j]*128; + + // set the six fake planes + for( i = 0; i < 6; i++ ) + if (box_planes[i*2+1] > 0) + r_skyplanes[i].dist = r_origin[box_planes[i*2]]+128; + else + r_skyplanes[i].dist = r_origin[box_planes[i*2]]-128; + + // fix texture offsets + for( i = 0; i < 6; i++ ) { + r_skytexinfo[i].offset[0] = -DotProduct( r_origin, r_skytexinfo[i].axis[0] ); + r_skytexinfo[i].offset[1] = -DotProduct( r_origin, r_skytexinfo[i].axis[1] ); + } + + // emit the six faces + oldkey = r_currentkey; + r_currentkey = 0x7ffffff0; + for( i = 0; i < 6; i++ ) { + R_RenderFace( &r_skyfaces[i], 15 ); + } + r_currentkey = oldkey; // bsp sorting order +} + +/* +============ +R_SetSky +============ +*/ +void R_SetSky( const char *name, float rotate, vec3_t axis ) { + int i; + char path[MAX_QPATH]; + image_t *image; + +// sky_rotate = rotate; +// VectorCopy( axis, sky_axis ); + + for( i = 0; i < 6; i++ ) { + Q_concat( path, sizeof( path ), "env/", name, + r_skysidenames[r_skysideimage[i]], ".pcx", NULL ); + image = IMG_Find( path, it_sky ); + if( !image ) { + image = r_notexture; + } + r_skytexinfo[i].image = image; + } +} + |