/*
===============
CG_LightVertex
Lights a particular vertex
===============
*/
static void CG_LightVertex( vec3_t point, byte alpha, byte *rgba )
{
int i;
vec3_t alight, dlight, lightdir;
trap_R_LightForPoint( point, alight, dlight, lightdir );
for( i = 0; i <= 2; i++ )
rgba[ i ] = (int)alight[ i ];
rgba[ 3 ] = alpha;
}
/*
===============
CG_StartShadowCaster
Helper function to add a inverse dynamic light to create shadows for the
following models.
===============
*/
void CG_StartShadowCaster( vec3_t origin, vec3_t mins, vec3_t maxs ) {
vec3_t ambientLight, directedLight, lightDir;
vec3_t lightPos;
trace_t tr;
vec3_t traceMins = { -3.0f, -3.0f, -3.0f };
vec3_t traceMaxs = { 3.0f, 3.0f, 3.0f };
float maxLightDist = Distance( maxs, mins );
// find a point to place the light source by tracing in the
// average light direction
trap_R_LightForPoint( origin, ambientLight, directedLight, lightDir );
VectorMA( origin, 3.0f * maxLightDist, lightDir, lightPos );
CG_Trace( &tr, origin, traceMins, traceMaxs, lightPos, 0, MASK_OPAQUE, 0 );
if( !tr.startsolid ) {
VectorCopy( tr.endpos, lightPos );
}
trap_R_AddLightToScene( lightPos, 2.0f * Distance( lightPos, origin ),
3.0f, directedLight[0], directedLight[1],
directedLight[2], 0,
REF_RESTRICT_DLIGHT | REF_INVERSE_DLIGHT );
}
