FarseerPhysics.Collision.Shapes.PolygonShape.setVerticesNoCopy C# (CSharp) Method

		public void setVerticesNoCopy( Vertices verts )
		{
			Debug.Assert( verts.Count >= 3 && verts.Count <= Settings.maxPolygonVertices );
			_vertices = verts;

			if( Settings.useConvexHullPolygons )
			{
				// FPE note: This check is required as the GiftWrap algorithm early exits on triangles
				// So instead of giftwrapping a triangle, we just force it to be clock wise.
				if( _vertices.Count <= 3 )
					_vertices.forceCounterClockWise();
				else
					_vertices = GiftWrap.getConvexHull( _vertices );
			}

			if( _normals == null )
				_normals = new Vertices( _vertices.Count );
			else
				_normals.Clear();

			// Compute normals. Ensure the edges have non-zero length.
			for( var i = 0; i < _vertices.Count; ++i )
			{
				var next = i + 1 < _vertices.Count ? i + 1 : 0;
				var edge = _vertices[next] - _vertices[i];
				Debug.Assert( edge.LengthSquared() > Settings.epsilon * Settings.epsilon );

				// FPE optimization: Normals.Add(MathHelper.Cross(edge, 1.0f));
				var temp = new Vector2( edge.Y, -edge.X );
				temp.Normalize();
				_normals.Add( temp );
			}

			// Compute the polygon mass data
			computeProperties();
		}