Canguro.Controller.Tracking.PolygonTrackingService.Paint C# (CSharp) Метод

        public override void Paint(Device device)
        {
            int numPoints = points.Count;
            if (numPoints < 1) return; // Cannot paint polygon with less than 3 points (2 stored + mouse position)

            device.VertexFormat = CustomVertex.TransformedColored.Format;

            recalcPoints();

            if (numPoints > 1)
            {
                Cull cull = device.RenderState.CullMode;
                bool alphaEnable = device.RenderState.AlphaBlendEnable;
                ShadeMode shadeMode = device.RenderState.ShadeMode;

                // Draw Triangles
                device.RenderState.CullMode = Cull.None;
                device.RenderState.AlphaBlendEnable = true;
                device.RenderState.ShadeMode = ShadeMode.Flat;

                device.RenderState.SourceBlend = Blend.BothSourceAlpha;
                device.RenderState.DestinationBlend = Blend.DestinationColor;

                device.DrawUserPrimitives(PrimitiveType.TriangleFan, numPoints - 1, verts);

                device.RenderState.AlphaBlendEnable = alphaEnable;
                device.RenderState.CullMode = cull;
                device.RenderState.ShadeMode = shadeMode;
            }

            // Draw Polygon Contour
            device.DrawUserPrimitives(PrimitiveType.LineStrip, numPoints + ((numPoints > 1) ? 1 : 0), lineVertices);
        }