//----------------------------------------------------------------------------
void Node::GetVisibleSetRenderObject(Culler& rCuller, Bool noCull)
{
const Camera* pCamera = rCuller.GetCamera();
// Add this RenderObject if it's not culled. (Its bounding volume is
// smaller or equal the bounding volume of this node).
if (mspRenderObject && ((pCamera->GetLayerMask() & mLayerMask) != 0))
{
if (GetQuantity() == 0)
{
const Vector3F& rCamPos = rCuller.GetCamera()->GetLocation();
Vector3F pos = mspRenderObjectWorldBound->GetCenter() - rCamPos;
rCuller.Insert(mspRenderObject, &World, pos);
}
else
{
UInt savePlaneState = rCuller.GetPlaneState();
if (noCull || rCuller.IsVisible(mspRenderObjectWorldBound, true))
{
const Vector3F& rCamPos = rCuller.GetCamera()->GetLocation();
Vector3F pos = mspRenderObjectWorldBound->GetCenter() - rCamPos;
rCuller.Insert(mspRenderObject, &World, pos);
}
rCuller.SetPlaneState(savePlaneState);
}
}
}
//----------------------------------------------------------------------------
void Portal::GetVisibleSet (Culler& culler, bool noCull)
{
// Visit only the adjacent region if the portal is open.
if (!Open)
{
return;
}
// Traverse only through visible portals.
if (!culler.IsVisible(mNumVertices, mWorldVertices, true))
{
return;
}
// It is possible that this portal is visited along a path of portals
// from the current room containing the camera. Such portals might
// have a back-facing polygon relative to the camera. It is not possible
// to see through these, so cull them.
const Camera* camera = culler.GetCamera();
if (mWorldPlane.WhichSide(camera->GetPosition()) < 0)
{
return;
}
// Save the current frustum.
float saveFrustum[6];
const float* frustum = culler.GetFrustum();
for (int j = 0; j < 6; ++j)
{
saveFrustum[j] = frustum[j];
}
// If the observer can see through the portal, the culler's frustum may
// be reduced in size based on the portal geometry.
float reducedFrustum[6];
if (ReducedFrustum(culler, reducedFrustum))
{
// Use the reduced frustum for drawing the adjacent region.
culler.SetFrustum(reducedFrustum);
// Visit the adjacent region and any nonculled objects in it.
AdjacentRegion->GetVisibleSet(culler, noCull);
// Restore the previous frustum.
culler.SetFrustum(saveFrustum);
}
}
//----------------------------------------------------------------------------
void Spatial::OnGetVisibleSet (Culler& culler, bool noCull)
{
if (Culling == CULL_ALWAYS)
{
return;
}
if (Culling == CULL_NEVER)
{
noCull = true;
}
unsigned int savePlaneState = culler.GetPlaneState();
if (noCull || culler.IsVisible(WorldBound))
{
GetVisibleSet(culler, noCull);
}
culler.SetPlaneState(savePlaneState);
}
