private /*static*/ void BuildOccluder(DROccluderNodeContent occluderNode)
{
var mesh = occluderNode.InputMesh;
MergeDuplicatePositions(mesh, Numeric.EpsilonF);
// Get all positions in mesh.
var meshPositions = mesh.Positions.Select(p => (Vector3)p).ToList();
// Get all triangles in mesh.
var meshIndices = new List <int>();
foreach (var geometry in mesh.Geometry)
{
var positionIndices = geometry.Vertices.PositionIndices;
var indices = geometry.Indices;
for (int i = 0; i < indices.Count; i++)
{
meshIndices.Add(positionIndices[indices[i]]);
}
}
OptimizeForCache(meshPositions, meshIndices, mesh.Identity);
occluderNode.Occluder = new DROccluderContent
{
Vertices = meshPositions,
Indices = meshIndices
};
}
private void ValidateOccluder(DROccluderNodeContent occluderNode)
{
int numberOfVertices = occluderNode.Occluder.Vertices.Count;
if (numberOfVertices > ushort.MaxValue)
{
string message = string.Format(
CultureInfo.InvariantCulture,
"Occluder is too complex: The occluder \"{0}\" has {1} vertices. Max allowed number of vertices is {2}.",
occluderNode.Name, numberOfVertices, ushort.MaxValue);
throw new InvalidContentException(message, _input.Identity);
}
}
private static DRSceneNodeContent BuildSceneGraph(NodeContent node, DRSceneNodeContent parent)
{
CheckForCyclicReferences(node);
DRSceneNodeContent sceneNode;
if (node is BoneContent)
{
// ----- BoneContent
// Bones do not show up in the scene graph.
sceneNode = null;
}
else if (node is MeshContent)
{
// ----- MeshContent
var mesh = (MeshContent)node;
string morphTargetName;
if (ContentHelper.IsMorphTarget(mesh, out morphTargetName))
{
// ----- Morph Targets
// Morph targets are stored in the parent mesh, they do not show up in
// the scene graph. Children of morph targets are ignored!
mesh.Name = morphTargetName;
AddMorphTarget(parent, mesh);
sceneNode = null;
}
else if (ContentHelper.IsOccluder(mesh))
{
// ----- OccluderNode
sceneNode = new DROccluderNodeContent {
InputMesh = mesh
};
}
else
{
// ----- MeshNode
sceneNode = new DRMeshNodeContent {
InputMesh = mesh
};
}
}
else
{
// ----- Empty/unsupported node
sceneNode = new DRSceneNodeContent();
}
if (sceneNode != null)
{
sceneNode.Name = node.Name;
Pose pose;
Vector3 scale;
DecomposeTransform(node, out pose, out scale);
sceneNode.PoseLocal = pose;
sceneNode.ScaleLocal = scale;
if (node.Children.Count > 0)
{
// Process children.
sceneNode.Children = new List <DRSceneNodeContent>();
// Recursively add children.
foreach (var childNode in node.Children)
{
var childSceneNode = BuildSceneGraph(childNode, sceneNode);
if (childSceneNode != null)
{
childSceneNode.Parent = sceneNode;
sceneNode.Children.Add(childSceneNode);
}
}
}
}
return(sceneNode);
}
