70 lines
1.5 KiB
C
70 lines
1.5 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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// r_sky.c
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#include "globaldef.h"
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#include "r_local.h"
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#include "d_local.h"
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int iskyspeed = 8;
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int iskyspeed2 = 2;
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float skyspeed, skyspeed2;
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float skytime;
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byte *r_skysource;
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byte *skyunderlay, *skyoverlay;
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/*
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=============
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R_InitSky
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A sky texture is 256*128, with the right side being a masked overlay
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==============
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*/
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void R_InitSky (texture_t *mt)
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{
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skyoverlay = (byte *)mt + mt->offsets[0];
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skyunderlay = skyoverlay+128;
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}
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/*
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=============
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R_SetSkyFrame
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==============
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*/
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void R_SetSkyFrame (void)
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{
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int g, s1, s2;
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float temp;
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skyspeed = iskyspeed;
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skyspeed2 = iskyspeed2;
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g = GreatestCommonDivisor (iskyspeed, iskyspeed2);
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s1 = iskyspeed / g;
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s2 = iskyspeed2 / g;
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temp = SKYSIZE * s1 * s2;
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skytime = cl.time - ((int)(cl.time / temp) * temp);
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}
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