// Extracts an easily processable BVH tree from the packed version in the mesh data
public BVHNode getSectionBVH()
{
if (m_nodes == null || m_nodes.Count == 0)
{
return(null);
}
BVHNode root = new BVHNode();
root.Min = new Vector3(m_domain.m_min.X, m_domain.m_min.Y, m_domain.m_min.Z);
root.Max = new Vector3(m_domain.m_max.X, m_domain.m_max.Y, m_domain.m_max.Z);
var cnode = m_nodes[0];
if ((cnode.m_data & 0x01) > 0)
{
root.Left = buildBVHTree(root.Min, root.Max, 1);
root.Right = buildBVHTree(root.Min, root.Max, (uint)cnode.m_data & 0xFE);
}
else
{
root.IsTerminal = true;
root.Index = (uint)cnode.m_data / 2;
}
return(root);
}
// Extracts an easily processable BVH tree from the packed version in the mesh data
public BVHNode getMeshBVH()
{
if (m_meshTree.m_nodes == null || m_meshTree.m_nodes.Count == 0)
{
return(null);
}
BVHNode root = new BVHNode();
root.Min = new Vector3(m_meshTree.m_domain.m_min.X, m_meshTree.m_domain.m_min.Y, m_meshTree.m_domain.m_min.Z);
root.Max = new Vector3(m_meshTree.m_domain.m_max.X, m_meshTree.m_domain.m_max.Y, m_meshTree.m_domain.m_max.Z);
var cnode = m_meshTree.m_nodes[0];
if ((cnode.m_hiData & 0x80) > 0)
{
root.Left = buildBVHTree(root.Min, root.Max, 1);
root.Right = buildBVHTree(root.Min, root.Max, ((((uint)cnode.m_hiData & 0x7F) << 8) | (uint)cnode.m_loData) * 2);
}
else
{
root.IsTerminal = true;
root.Index = (((uint)cnode.m_hiData & 0x7F) << 8) | (uint)cnode.m_loData;
}
return(root);
}
// Recursively builds the BVH tree from the compressed packed array
private BVHNode buildBVHTree(Vector3 parentBBMin, Vector3 parentBBMax, uint nodeIndex)
{
BVHNode node = new BVHNode();
var cnode = m_nodes[(int)nodeIndex];
node.Min = cnode.DecompressMin(parentBBMin, parentBBMax);
node.Max = cnode.DecompressMax(parentBBMin, parentBBMax);
if ((cnode.m_data & 0x01) > 0)
{
node.Left = buildBVHTree(node.Min, node.Max, nodeIndex + 1);
node.Right = buildBVHTree(node.Min, node.Max, nodeIndex + ((uint)cnode.m_data & 0xFE));
}
else
{
node.IsTerminal = true;
node.Index = (uint)cnode.m_data / 2;
}
return(node);
}
private BVHNode buildBVHTree(Vector3 parentBBMin, Vector3 parentBBMax, uint nodeIndex)
{
BVHNode node = new BVHNode();
var cnode = m_meshTree.m_nodes[(int)nodeIndex];
node.Min = cnode.DecompressMin(parentBBMin, parentBBMax);
node.Max = cnode.DecompressMax(parentBBMin, parentBBMax);
if ((cnode.m_hiData & 0x80) > 0)
{
node.Left = buildBVHTree(node.Min, node.Max, nodeIndex + 1);
node.Right = buildBVHTree(node.Min, node.Max, nodeIndex + ((((uint)cnode.m_hiData & 0x7F) << 8) | (uint)cnode.m_loData) * 2);
}
else
{
node.IsTerminal = true;
node.Index = (((uint)cnode.m_hiData & 0x7F) << 8) | (uint)cnode.m_loData;
}
return(node);
}
