public void InsertNode(SceneNode node, PartitionCategories category)
{
switch (category)
{
case PartitionCategories.Dynamic:
mDynamicRoot.AddChild(node);
break;
case PartitionCategories.Static:
ImplicitBoundingBoxNode boxNode = node as ImplicitBoundingBoxNode;
if (boxNode == null)
{
boxNode = new ImplicitBoundingBoxNode(true);
boxNode.AddChild(node);
boxNode.RecalculateBound();
}
if (mStaticTreeRoot == null)
{
mStaticTreeRoot = boxNode;
}
else
{
mStaticTreeRoot.InsertNodeIntoBVH(boxNode);
}
break;
case PartitionCategories.Skybox:
mSkyboxRoot.AddChild(node);
break;
}
}
private SceneNode PartitionSectorGrid(int xMinIndex, int xCount, int zMinIndex, int zCount)
{
if (xCount == 1 && zCount == 1)
{
return(CreateSectorNode(xMinIndex, zMinIndex));
}
SceneNode child1 = null;
SceneNode child2 = null;
if (xCount > zCount)
{
child1 = PartitionSectorGrid(
xMinIndex,
xCount / 2,
zMinIndex,
zCount);
child2 = PartitionSectorGrid(
xMinIndex + xCount / 2,
xCount - xCount / 2,
zMinIndex,
zCount);
}
else
{
child1 = PartitionSectorGrid(
xMinIndex,
xCount,
zMinIndex,
zCount / 2);
child2 = PartitionSectorGrid(
xMinIndex,
xCount,
zMinIndex + zCount / 2,
zCount - zCount / 2);
}
ImplicitBoundingBoxNode implicitChild1 = child1 as ImplicitBoundingBoxNode;
ImplicitBoundingBoxNode implicitChild2 = child2 as ImplicitBoundingBoxNode;
// If either child is not an implicit node, then this node must be marked as a 'leaf' node so the BVH insertion will work correctly.
ImplicitBoundingBoxNode parentPartition = new ImplicitBoundingBoxNode(implicitChild1 == null || implicitChild2 == null);
parentPartition.AddChild(child1);
parentPartition.AddChild(child2);
return(parentPartition);
}
private SceneNode PartitionSectorGrid(int xMinIndex, int xCount, int zMinIndex, int zCount)
{
if (xCount == 1 && zCount == 1)
return CreateSectorNode(xMinIndex, zMinIndex);
SceneNode child1 = null;
SceneNode child2 = null;
if (xCount > zCount)
{
child1 = PartitionSectorGrid(
xMinIndex,
xCount / 2,
zMinIndex,
zCount);
child2 = PartitionSectorGrid(
xMinIndex + xCount / 2,
xCount - xCount / 2,
zMinIndex,
zCount);
}
else
{
child1 = PartitionSectorGrid(
xMinIndex,
xCount,
zMinIndex,
zCount / 2);
child2 = PartitionSectorGrid(
xMinIndex,
xCount,
zMinIndex + zCount / 2,
zCount - zCount / 2);
}
ImplicitBoundingBoxNode implicitChild1 = child1 as ImplicitBoundingBoxNode;
ImplicitBoundingBoxNode implicitChild2 = child2 as ImplicitBoundingBoxNode;
// If either child is not an implicit node, then this node must be marked as a 'leaf' node so the BVH insertion will work correctly.
ImplicitBoundingBoxNode parentPartition = new ImplicitBoundingBoxNode(implicitChild1 == null || implicitChild2 == null);
parentPartition.AddChild(child1);
parentPartition.AddChild(child2);
return parentPartition;
}
public void InsertNode(SceneNode node, PartitionCategories category)
{
switch (category)
{
case PartitionCategories.Dynamic:
mDynamicRoot.AddChild(node);
break;
case PartitionCategories.Static:
ImplicitBoundingBoxNode boxNode = node as ImplicitBoundingBoxNode;
if (boxNode == null)
{
boxNode = new ImplicitBoundingBoxNode(true);
boxNode.AddChild(node);
boxNode.RecalculateBound();
}
if (mStaticTreeRoot == null)
{
mStaticTreeRoot = boxNode;
}
else
{
mStaticTreeRoot.InsertNodeIntoBVH(boxNode);
}
break;
case PartitionCategories.Skybox:
mSkyboxRoot.AddChild(node);
break;
}
}