/*
==================
idInteraction::AddActiveInteraction
Create and add any necessary light and shadow triangles
If the model doesn't have any surfaces that need interactions
with this type of light, it can be skipped, but we might need to
instantiate the dynamic model to find out
==================
*/
void idInteraction::AddActiveInteraction( void ) {
viewLight_t * vLight;
viewEntity_t * vEntity;
idScreenRect shadowScissor;
idScreenRect lightScissor;
idVec3 localLightOrigin;
idVec3 localViewOrigin;
vLight = lightDef->viewLight;
vEntity = entityDef->viewEntity;
// do not waste time culling the interaction frustum if there will be no shadows
if ( !HasShadows() ) {
// use the entity scissor rectangle
shadowScissor = vEntity->scissorRect;
// culling does not seem to be worth it for static world models
} else if ( entityDef->parms.hModel->IsStaticWorldModel() ) {
// use the light scissor rectangle
shadowScissor = vLight->scissorRect;
} else {
// try to cull the interaction
// this will also cull the case where the light origin is inside the
// view frustum and the entity bounds are outside the view frustum
if ( CullInteractionByViewFrustum( tr.viewDef->viewFrustum ) ) {
return;
}
// calculate the shadow scissor rectangle
shadowScissor = CalcInteractionScissorRectangle( tr.viewDef->viewFrustum );
}
// get out before making the dynamic model if the shadow scissor rectangle is empty
if ( shadowScissor.IsEmpty() ) {
return;
}
// We will need the dynamic surface created to make interactions, even if the
// model itself wasn't visible. This just returns a cached value after it
// has been generated once in the view.
idRenderModel *model = R_EntityDefDynamicModel( entityDef );
if ( model == NULL || model->NumSurfaces() <= 0 ) {
return;
}
// the dynamic model may have changed since we built the surface list
if ( !IsDeferred() && entityDef->dynamicModelFrameCount != dynamicModelFrameCount ) {
FreeSurfaces();
}
dynamicModelFrameCount = entityDef->dynamicModelFrameCount;
// actually create the interaction if needed, building light and shadow surfaces as needed
if ( IsDeferred() ) {
CreateInteraction( model );
}
R_GlobalPointToLocal( vEntity->modelMatrix, lightDef->globalLightOrigin, localLightOrigin );
R_GlobalPointToLocal( vEntity->modelMatrix, tr.viewDef->renderView.vieworg, localViewOrigin );
// calculate the scissor as the intersection of the light and model rects
// this is used for light triangles, but not for shadow triangles
lightScissor = vLight->scissorRect;
lightScissor.Intersect( vEntity->scissorRect );
bool lightScissorsEmpty = lightScissor.IsEmpty();
// for each surface of this entity / light interaction
for ( int i = 0; i < numSurfaces; i++ ) {
surfaceInteraction_t *sint = &surfaces[i];
// see if the base surface is visible, we may still need to add shadows even if empty
if ( !lightScissorsEmpty && sint->ambientTris && sint->ambientTris->ambientViewCount == tr.viewCount ) {
// make sure we have created this interaction, which may have been deferred
// on a previous use that only needed the shadow
if ( sint->lightTris == LIGHT_TRIS_DEFERRED ) {
sint->lightTris = R_CreateLightTris( vEntity->entityDef, sint->ambientTris, vLight->lightDef, sint->shader, sint->cullInfo );
R_FreeInteractionCullInfo( sint->cullInfo );
}
srfTriangles_t *lightTris = sint->lightTris;
if ( lightTris ) {
// try to cull before adding
// FIXME: this may not be worthwhile. We have already done culling on the ambient,
// but individual surfaces may still be cropped somewhat more
if ( !R_CullLocalBox( lightTris->bounds, vEntity->modelMatrix, 5, tr.viewDef->frustum ) ) {
// make sure the original surface has its ambient cache created
srfTriangles_t *tri = sint->ambientTris;
if ( !tri->ambientCache ) {
if ( !R_CreateAmbientCache( tri, sint->shader->ReceivesLighting() ) ) {
// skip if we were out of vertex memory
continue;
}
}
// reference the original surface's ambient cache
lightTris->ambientCache = tri->ambientCache;
// touch the ambient surface so it won't get purged
vertexCache.Touch(lightTris->ambientCache);
if (!lightTris->indexCache) {
vertexCache.Alloc(lightTris->indexes, lightTris->numIndexes * sizeof(lightTris->indexes[0]), &lightTris->indexCache, true);
vertexCache.Touch(lightTris->indexCache);
}
// add the surface to the light list
const idMaterial *shader = sint->shader;
R_GlobalShaderOverride(&shader);
// there will only be localSurfaces if the light casts shadows and
// there are surfaces with NOSELFSHADOW
if ( sint->shader->Coverage() == MC_TRANSLUCENT ) {
R_LinkLightSurf( &vLight->translucentInteractions, lightTris,
vEntity, lightDef, shader, lightScissor, false );
} else if ( !lightDef->parms.noShadows && sint->shader->TestMaterialFlag(MF_NOSELFSHADOW) ) {
R_LinkLightSurf( &vLight->localInteractions, lightTris,
vEntity, lightDef, shader, lightScissor, false );
} else {
R_LinkLightSurf( &vLight->globalInteractions, lightTris,
vEntity, lightDef, shader, lightScissor, false );
}
}
}
}
srfTriangles_t *shadowTris = sint->shadowTris;
// the shadows will always have to be added, unless we can tell they
// are from a surface in an unconnected area
if ( shadowTris ) {
// check for view specific shadow suppression (player shadows, etc)
if ( !r_skipSuppress.GetBool() ) {
if ( entityDef->parms.suppressShadowInViewID &&
entityDef->parms.suppressShadowInViewID == tr.viewDef->renderView.viewID ) {
continue;
}
if ( entityDef->parms.suppressShadowInLightID &&
entityDef->parms.suppressShadowInLightID == lightDef->parms.lightId ) {
continue;
}
}
// cull static shadows that have a non-empty bounds
// dynamic shadows that use the turboshadow code will not have valid
// bounds, because the perspective projection extends them to infinity
if ( r_useShadowCulling.GetBool() && !shadowTris->bounds.IsCleared() ) {
if ( R_CullLocalBox( shadowTris->bounds, vEntity->modelMatrix, 5, tr.viewDef->frustum ) ) {
continue;
}
}
// copy the shadow vertexes to the vertex cache if they have been purged
// if we are using shared shadowVertexes and letting a vertex program fix them up,
// get the shadowCache from the parent ambient surface
if ( !shadowTris->shadowVertexes ) {
// the data may have been purged, so get the latest from the "home position"
shadowTris->shadowCache = sint->ambientTris->shadowCache;
}
// if we have been purged, re-upload the shadowVertexes
if ( !shadowTris->shadowCache ) {
if ( shadowTris->shadowVertexes ) {
// each interaction has unique vertexes
R_CreatePrivateShadowCache( shadowTris );
} else {
R_CreateVertexProgramShadowCache( sint->ambientTris );
shadowTris->shadowCache = sint->ambientTris->shadowCache;
}
// if we are out of vertex cache space, skip the interaction
if ( !shadowTris->shadowCache ) {
continue;
}
}
// touch the shadow surface so it won't get purged
vertexCache.Touch( shadowTris->shadowCache );
if ( !shadowTris->indexCache ) {
vertexCache.Alloc( shadowTris->indexes, shadowTris->numIndexes * sizeof( shadowTris->indexes[0] ), &shadowTris->indexCache, true );
vertexCache.Touch( shadowTris->indexCache );
}
// see if we can avoid using the shadow volume caps
bool inside = R_PotentiallyInsideInfiniteShadow( sint->ambientTris, localViewOrigin, localLightOrigin );
if ( sint->shader->TestMaterialFlag( MF_NOSELFSHADOW ) ) {
R_LinkLightSurf( &vLight->localShadows,
shadowTris, vEntity, lightDef, NULL, shadowScissor, inside );
} else {
R_LinkLightSurf( &vLight->globalShadows,
shadowTris, vEntity, lightDef, NULL, shadowScissor, inside );
}
}
}
}
/*
===============
R_AddAmbientDrawsurfs
Adds surfaces for the given viewEntity
Walks through the viewEntitys list and creates drawSurf_t for each surface of
each viewEntity that has a non-empty scissorRect
===============
*/
static void R_AddAmbientDrawsurfs( viewEntity_t *vEntity )
{
int i, total;
idRenderEntityLocal *def;
srfTriangles_t *tri;
idRenderModel *model;
const idMaterial *shader;
def = vEntity->entityDef;
if( def->dynamicModel )
{
model = def->dynamicModel;
}
else
{
model = def->parms.hModel;
}
// add all the surfaces
total = model->NumSurfaces();
for( i = 0; i < total; i++ )
{
const modelSurface_t *surf = model->Surface( i );
// for debugging, only show a single surface at a time
if( r_singleSurface.GetInteger() >= 0 && i != r_singleSurface.GetInteger() )
{
continue;
}
tri = surf->geometry;
if( !tri )
{
continue;
}
if( !tri->numIndexes )
{
continue;
}
shader = surf->shader;
shader = R_RemapShaderBySkin( shader, def->parms.customSkin, def->parms.customShader );
R_GlobalShaderOverride( &shader );
if( !shader )
{
continue;
}
if( !shader->IsDrawn() )
{
continue;
}
// debugging tool to make sure we are have the correct pre-calculated bounds
if( r_checkBounds.GetBool() )
{
int j, k;
for( j = 0; j < tri->numVerts; j++ )
{
for( k = 0; k < 3; k++ )
{
if( tri->verts[j].xyz[k] > tri->bounds[1][k] + CHECK_BOUNDS_EPSILON || tri->verts[j].xyz[k] < tri->bounds[0][k] - CHECK_BOUNDS_EPSILON )
{
common->Printf( "bad tri->bounds on %s:%s\n", def->parms.hModel->Name(), shader->GetName() );
break;
}
if( tri->verts[j].xyz[k] > def->referenceBounds[1][k] + CHECK_BOUNDS_EPSILON || tri->verts[j].xyz[k] < def->referenceBounds[0][k] - CHECK_BOUNDS_EPSILON )
{
common->Printf( "bad referenceBounds on %s:%s\n", def->parms.hModel->Name(), shader->GetName() );
break;
}
}
if( k != 3 )
{
break;
}
}
}
if( !R_CullLocalBox( tri->bounds, vEntity->modelMatrix, 5, tr.viewDef->frustum ) )
{
def->visibleCount = tr.viewCount;
// make sure we have an ambient cache
if( !R_CreateAmbientCache( tri, shader->ReceivesLighting() ) )
{
// don't add anything if the vertex cache was too full to give us an ambient cache
return;
}
// touch it so it won't get purged
vertexCache.Touch( tri->ambientCache );
if( !tri->indexCache )
{
vertexCache.Alloc( tri->indexes, tri->numIndexes * sizeof( tri->indexes[0] ), &tri->indexCache, true );
}
if( tri->indexCache )
{
vertexCache.Touch( tri->indexCache );
}
// add the surface for drawing
R_AddDrawSurf( tri, vEntity, &vEntity->entityDef->parms, shader, vEntity->scissorRect );
// ambientViewCount is used to allow light interactions to be rejected
// if the ambient surface isn't visible at all
tri->ambientViewCount = tr.viewCount;
}
}
// add the lightweight decal surfaces
for( idRenderModelDecal *decal = def->decals; decal; decal = decal->Next() )
{
decal->AddDecalDrawSurf( vEntity );
}
}