/*
=================
R_CreateLightRefs
=================
*/
void R_CreateLightRefs( idRenderLightLocal* light )
{
// derive light data
R_DeriveLightData( light );
// determine the areaNum for the light origin, which may let us
// cull the light if it is behind a closed door
// it is debatable if we want to use the entity origin or the center offset origin,
// but we definitely don't want to use a parallel offset origin
light->areaNum = light->world->PointInArea( light->globalLightOrigin );
if( light->areaNum == -1 )
{
light->areaNum = light->world->PointInArea( light->parms.origin );
}
// bump the view count so we can tell if an
// area already has a reference
tr.viewCount++;
// if we have a prelight model that includes all the shadows for the major world occluders,
// we can limit the area references to those visible through the portals from the light center.
// We can't do this in the normal case, because shadows are cast from back facing triangles, which
// may be in areas not directly visible to the light projection center.
if( light->parms.prelightModel != NULL && r_useLightPortalFlow.GetBool() && light->lightShader->LightCastsShadows() )
{
light->world->FlowLightThroughPortals( light );
}
else
{
// push the light frustum down the BSP tree into areas
light->world->PushFrustumIntoTree( NULL, light, light->inverseBaseLightProject, bounds_zeroOneCube );
}
R_CreateLightDefFogPortals( light );
}
/*
==============
CreateMapLight
==============
*/
static void CreateMapLight( const idMapEntity *mapEnt ) {
mapLight_t *light;
bool dynamic;
// designers can add the "noPrelight" flag to signal that
// the lights will move around, so we don't want
// to bother chopping up the surfaces under it or creating
// shadow volumes
mapEnt->epairs.GetBool( "noPrelight", "0", dynamic );
if( dynamic ) {
return;
}
light = new mapLight_t;
light->name[0] = '\0';
light->shadowTris = NULL;
// parse parms exactly as the game do
// use the game's epair parsing code so
// we can use the same renderLight generation
gameEdit->ParseSpawnArgsToRenderLight( &mapEnt->epairs, &light->def.parms );
R_DeriveLightData( &light->def );
// get the name for naming the shadow surfaces
const char *name;
mapEnt->epairs.GetString( "name", "", &name );
idStr::Copynz( light->name, name, sizeof( light->name ) );
if( !light->name[0] ) {
common->Error( "Light at (%f,%f,%f) didn't have a name",
light->def.parms.origin[0], light->def.parms.origin[1], light->def.parms.origin[2] );
}
#if 0
// use the renderer code to get the bounding planes for the light
// based on all the parameters
R_RenderLightFrustum( light->parms, light->frustum );
light->lightShader = light->parms.shader;
#endif
dmapGlobals.mapLights.Append( light );
}
/*
===============
R_RenderLightFrustum
Called by the editor and dmap to operate on light volumes
===============
*/
void R_RenderLightFrustum( const renderLight_t &renderLight, idPlane lightFrustum[6] ) {
idRenderLightLocal fakeLight;
memset( &fakeLight, 0, sizeof( fakeLight ) );
fakeLight.parms = renderLight;
R_DeriveLightData( &fakeLight );
}
// RB begin
void R_RenderLightFrustum( const renderLight_t& renderLight, idPlane lightFrustum[6] )
{
idRenderLightLocal fakeLight;
fakeLight.parms = renderLight;
R_DeriveLightData( &fakeLight );
idRenderMatrix::GetFrustumPlanes( lightFrustum, fakeLight.baseLightProject, true, true );
// the DOOM 3 frustum planes point outside the frustum
for( int i = 0; i < 6; i++ )
{
lightFrustum[i] = -lightFrustum[i];
}
}
