void CClientLeafSystem::ProjectShadow( ClientLeafShadowHandle_t handle, const Vector& origin,
const Vector& dir, const Vector2D& size, float maxDist )
{
// Remove the shadow from any leaves it current exists in
RemoveShadowFromLeaves( handle );
RemoveShadowFromRenderables( handle );
Assert( ( m_Shadows[handle].m_Flags & SHADOW_FLAGS_PROJECTED_TEXTURE_TYPE_MASK ) == SHADOW_FLAGS_SHADOW );
// This will help us to avoid adding the shadow multiple times to a renderable
++m_ShadowEnum;
// Create a ray starting at the origin, with a boxsize == to the
// maximum size, and cast it along the direction of the shadow
// Then mark each leaf that the ray hits with the shadow
Ray_t ray;
VectorCopy( origin, ray.m_Start );
VectorMultiply( dir, maxDist, ray.m_Delta );
ray.m_StartOffset.Init( 0, 0, 0 );
float maxsize = max( size.x, size.y ) * 0.5f;
ray.m_Extents.Init( maxsize, maxsize, maxsize );
ray.m_IsRay = false;
ray.m_IsSwept = true;
CShadowLeafEnum leafEnum;
ISpatialQuery* pQuery = engine->GetBSPTreeQuery();
pQuery->EnumerateLeavesAlongRay( ray, &leafEnum, handle );
}
bool CBSPTreeData::EnumerateLeavesAlongRay( Ray_t const& ray, ISpatialLeafEnumerator* pEnum, int context )
{
return m_pBSPTree->EnumerateLeavesAlongRay( ray, pEnum, context );
}