/// <summary>
/// Traverses the specified graph path</summary>
/// <param name="graphPath">The graph path</param>
/// <param name="action">The render action</param>
/// <param name="camera">The camera</param>
/// <param name="list">The list</param>
/// <returns></returns>
public override TraverseState Traverse(Stack<SceneNode> graphPath, IRenderAction action, Camera camera, ICollection<TraverseNode> list)
{
// Get the "top matrix" before we push a new matrix on to it, just in case we need
// it for the bounding box test.
Matrix4F parentToWorld = action.TopMatrix;
// Push matrix onto the matrix stack even if we're not visible because this class
// implements the marker interface ISetsLocalTransform.
action.PushMatrix(m_node.Transform, true);
// If node is invisible then cull
if (!m_node.Visible)
return TraverseState.Cull;
TraverseState dResult = action.TraverseState;
if (dResult == TraverseState.None)
{
// Test if bounding sphere is contained in frustum
if (s_enableVFCull)
{
// Construct bounding box
Box box = new Box();
box.Extend(m_node.BoundingBox);
// Transform the bounding box into view space
Matrix4F localToView = Matrix4F.Multiply(parentToWorld, camera.ViewMatrix);
box.Transform(localToView);
if (!camera.Frustum.Contains(box))
dResult = TraverseState.Cull;
}
}
return dResult;
}
/// <summary>
/// Calculates bounding box of node's children</summary>
/// <returns>Bounding box of children</returns>
public Box CalculateBoundingBox()
{
var box = new Box();
foreach (IBoundable boundable in DomNode.Children.AsIEnumerable<IBoundable>())
box.Extend(boundable.BoundingBox);
box.Transform(Transform);
DomNodeUtil.SetBox(DomNode, Schema.nodeType.boundingBoxAttribute, box);
return box;
}
private Box CalculateBoundingBox()
{
// compute box.
var box = new Box();
foreach (InstanceGeometry instGeom in GetChildList<InstanceGeometry>(Schema.node.instance_geometryChild))
{
box.Extend(instGeom.Geometry.BoundingBox);
}
foreach (InstanceController instCtrl in GetChildList<InstanceController>(Schema.node.instance_controllerChild))
{
box.Extend(instCtrl.Geometry.BoundingBox);
}
foreach (Node nd in GetChildList<Node>(Schema.node.nodeChild))
{
box.Extend(nd.BoundingBox);
}
box.Transform(Transform);
return box;
}