public void CreateDepths(Camera inputCamera)
{
if (inputCamera == null)
{
return;
}
BoundingFrustum frust = inputCamera.GetFrustum();
BoundingBox box = MathFunctions.GetBoundingBox(frust.GetCorners());
Vector3 forward = frust.Near.Normal;
Vector3 z = Vector3.Zero;
foreach (InstanceData instance in Data)
{
z = instance.Transform.Translation - inputCamera.Position;
instance.Depth = z.LengthSquared();
if (instance.Depth < CullDistance)
{
// Half plane test. Faster. Much less accurate.
//if (Vector3.Dot(z, forward) > 0)
if (box.Contains(instance.Transform.Translation) != ContainmentType.Contains)
{
instance.Depth *= 100;
}
}
else
{
instance.Depth *= 100;
}
}
}
public PolygonDrawCommand(Camera camera, IEnumerable <Vector3> points, bool isClosed, Color lineColor, int lineWidth, Viewport viewport)
{
Points = new List <Vector2>();
BoundingFrustum cameraFrustrum = camera.GetFrustum();
foreach (Vector3 point in points)
{
if (cameraFrustrum.Contains(point) == ContainmentType.Contains)
{
Vector3 screenVec = viewport.Project(point, camera.ProjectionMatrix, camera.ViewMatrix, Matrix.Identity);
Points.Add(new Vector2(screenVec.X, screenVec.Y));
}
}
IsClosed = isClosed;
LineColor = lineColor;
LineWidth = lineWidth;
}