Axiom.Graphics.ShadowCaster.ExtrudeBounds C# (CSharp) Method

		protected virtual void ExtrudeBounds( AxisAlignedBox box, Vector4 lightPosition, float extrudeDistance )
		{
			Vector3 extrusionDir = Vector3.Zero;

			if ( lightPosition.w == 0 )
			{
				extrusionDir.x = -lightPosition.x;
				extrusionDir.y = -lightPosition.y;
				extrusionDir.z = -lightPosition.z;
				extrusionDir.Normalize();
				extrusionDir *= extrudeDistance;
				box.SetExtents( box.Minimum + extrusionDir, box.Maximum + extrusionDir );
			}
			else
			{
				Vector3[] corners = box.Corners;
				Vector3 vmin = new Vector3();
				Vector3 vmax = new Vector3();

				for ( int i = 0; i < 8; i++ )
				{
					extrusionDir.x = corners[ i ].x - lightPosition.x;
					extrusionDir.y = corners[ i ].y - lightPosition.y;
					extrusionDir.z = corners[ i ].z - lightPosition.z;
					extrusionDir.Normalize();
					extrusionDir *= extrudeDistance;
					Vector3 res = corners[ i ] + extrusionDir;

					if ( i == 0 )
					{
						vmin = res;
						vmax = res;
					}
					else
					{
						vmin.Floor( res );
						vmax.Ceil( res );
					}
				}

				box.SetExtents( vmin, vmax );
			}
		}