129 lines
3.0 KiB
C
129 lines
3.0 KiB
C
/*
|
|
Copyright (C) 1999-2007 id Software, Inc. and contributors.
|
|
For a list of contributors, see the accompanying CONTRIBUTORS file.
|
|
|
|
This file is part of GtkRadiant.
|
|
|
|
GtkRadiant 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.
|
|
|
|
GtkRadiant 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 GtkRadiant; if not, write to the Free Software
|
|
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
|
|
#define LIGHT_SHADOWS_C
|
|
|
|
#include "light.h"
|
|
#include "inout.h"
|
|
|
|
|
|
|
|
/* -------------------------------------------------------------------------------
|
|
|
|
ydnar: this code deals with shadow volume bsps
|
|
|
|
------------------------------------------------------------------------------- */
|
|
|
|
typedef struct shadowNode_s
|
|
{
|
|
vec4_t plane;
|
|
int children[ 2 ];
|
|
}
|
|
shadowNode_t;
|
|
|
|
int numShadowNodes;
|
|
shadowNode_t *shadowNodes;
|
|
|
|
|
|
|
|
/*
|
|
AddShadow()
|
|
adds a shadow, returning the index into the shadow list
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
MakeShadowFromPoints()
|
|
creates a shadow volume from 4 points (the first being the light origin)
|
|
*/
|
|
|
|
|
|
|
|
/*
|
|
SetupShadows()
|
|
sets up the shadow volumes for all lights in the world
|
|
*/
|
|
|
|
void SetupShadows( void ){
|
|
int i, j, s;
|
|
light_t *light;
|
|
dleaf_t *leaf;
|
|
dsurface_t *ds;
|
|
surfaceInfo_t *info;
|
|
shaderInfo_t *si;
|
|
byte *tested;
|
|
|
|
|
|
/* early out for weird cases where there are no lights */
|
|
if ( lights == NULL ) {
|
|
return;
|
|
}
|
|
|
|
/* note it */
|
|
Sys_FPrintf( SYS_VRB, "--- SetupShadows ---\n" );
|
|
|
|
/* allocate a surface test list */
|
|
tested = safe_malloc( numDrawSurfaces / 8 + 1 );
|
|
|
|
/* walk the list of lights */
|
|
for ( light = lights; light != NULL; light = light->next )
|
|
{
|
|
/* do some early out testing */
|
|
if ( light->cluster < 0 ) {
|
|
continue;
|
|
}
|
|
|
|
/* clear surfacetest list */
|
|
memset( tested, 0, numDrawSurfaces / 8 + 1 );
|
|
|
|
/* walk the bsp leaves */
|
|
for ( i = 0, leaf = dleafs; i < numleafs; i++, leaf++ )
|
|
{
|
|
/* in pvs? */
|
|
if ( ClusterVisible( light->cluster, leaf->cluster ) == qfalse ) {
|
|
continue;
|
|
}
|
|
|
|
/* walk the surface list for this leaf */
|
|
for ( j = 0; j < leaf->numLeafSurfaces; j++ )
|
|
{
|
|
/* don't filter a surface more than once */
|
|
s = dleafsurfaces[ leaf->firstLeafSurface + j ];
|
|
if ( tested[ s >> 3 ] & ( 1 << ( s & 7 ) ) ) {
|
|
continue;
|
|
}
|
|
tested[ s >> 3 ] |= ( 1 << ( s & 7 ) );
|
|
|
|
/* get surface and info */
|
|
ds = &drawSurfaces[ s ];
|
|
info = &surfaceInfos[ s ];
|
|
si = info->si;
|
|
|
|
/* don't create shadow volumes from translucent surfaces */
|
|
if ( si->contents & CONTENTS_TRANSLUCENT ) {
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|