private int AddModelFaces(Matrix3D parentMatrix, Model3D model)
{
if (model.Transform != null)
{
parentMatrix = model.Transform.Value * parentMatrix;
}
int result = 0;
Model3DGroup models = (model as Model3DGroup);
if (models != null)
{
// This is a group. Recurse through the children
foreach (Model3D m in models.Children)
{
result += AddModelFaces(parentMatrix, m);
}
}
else
{
if (!(model is GeometryModel3D))
{
throw new InvalidOperationException("Current only GeometryModel3D models supported for TerrianCollisionMask3D.");
}
Geometry3D geometry = ((GeometryModel3D)model).Geometry;
IList <Point3D> meshPoints = GeometryHelper.GetGeometryPoints((MeshGeometry3D)geometry, parentMatrix);
if (meshPoints != null)
{
AddFaces(meshPoints, 3, false);
result = meshPoints.Count;
}
}
return(result);
}