public static void GetMesh(IGraphicsService graphicsService, Shape shape, out Submesh submesh, out Matrix44F matrix)
{
// Update submesh.
var graphicsManager = graphicsService as GraphicsManager;
if (graphicsManager != null)
{
graphicsManager.ShapeMeshCache.GetMesh(shape, out submesh, out matrix);
}
else
{
// This happens if the user has implemented his own graphics manager -
// which is very unlikely.
submesh = MeshHelper.CreateSubmesh(graphicsService.GraphicsDevice, shape.GetMesh(0.05f, 4), MathHelper.ToRadians(70));
matrix = Matrix44F.Identity;
}
}
private void CreateMesh(Shape shape, out Submesh submesh, out Matrix44F matrix)
{
// Use a special shared submesh for box shapes.
var boxShape = shape as BoxShape;
if (boxShape != null)
{
if (_boxSubmesh == null)
_boxSubmesh = MeshHelper.GetBox(_graphicsService);
submesh = _boxSubmesh;
matrix = Matrix44F.CreateScale(boxShape.Extent);
return;
}
var transformedShape = shape as TransformedShape;
boxShape = (transformedShape != null) ? transformedShape.Child.Shape as BoxShape : null;
if (boxShape != null)
{
if (_boxSubmesh == null)
_boxSubmesh = MeshHelper.GetBox(_graphicsService);
submesh = _boxSubmesh;
matrix = transformedShape.Child.Pose
* Matrix44F.CreateScale(transformedShape.Child.Scale * boxShape.Extent);
return;
}
// Create the submesh. Return EmptySubmesh if the MeshHelper returns null.
var newSubmesh = MeshHelper.CreateSubmesh(
_graphicsService.GraphicsDevice,
shape.GetMesh(MeshRelativeError, MeshIterationLimit),
NormalAngleLimit);
submesh = newSubmesh ?? EmptySubmesh;
matrix = Matrix44F.Identity;
}