Пример #1
0
        PaintingCanvas GetTriangleShadow(Triangle triangle, int canvasHeight, int canvasWidth)
        {
            // Create separate canvases for the triangles shadows
            PaintingCanvas shadowCanvas = PaintingCanvas.CreateInstance(canvasWidth, canvasHeight);

            Shadow.PaintTriangleShadow(triangle, shadowCanvas);

            return(shadowCanvas);
        }
Пример #2
0
        public PaintingCanvas PaintRedGreenTriangles(Triangle redTriangle, Triangle greenTriangle)
        {
            // Canvas settings
            const int   width     = 360;
            const int   height    = 360;
            const float pixelSize = 0.01f;

            // Camera settings
            const float yOffset     = 10;
            const float focalLength = 5;

            // Transform the triangles for the camera's perspective
            Triangle perspectiveRedTriangle   = GetTriangleInPerspective(redTriangle, focalLength);
            Triangle perspectiveGreenTriangle = GetTriangleInPerspective(greenTriangle, focalLength);

            // Triangle shadows
            PaintingCanvas t1Shadow = GetTriangleShadow(perspectiveRedTriangle, width, height);
            PaintingCanvas t2Shadow = GetTriangleShadow(perspectiveGreenTriangle, width, height);

            Plane plane1 = new Plane(redTriangle);
            Plane plane2 = new Plane(greenTriangle);

            double[,] zBuffer = new double[width, height];
            FillBuffer(zBuffer, 1000000);

            PaintingCanvas trianglesCanvas = PaintingCanvas.CreateInstance(width, height);

            for (int i = 0; i < trianglesCanvas.Height; i++)
            {
                float y = (trianglesCanvas.Height / 2 - i) * pixelSize;

                for (int j = 0; j < trianglesCanvas.Width; j++)
                {
                    float x = (j - trianglesCanvas.Width / 2) * pixelSize;

                    // Draw triangle 1
                    if (t1Shadow.IsPixelColored(i, j))
                    {
                        Point   cameraPoint = new Point(x, yOffset, y);
                        Vector3 line        = new Vector3(-x, 1, -y);

                        double d = plane1.DistanceToPlane(cameraPoint, line);

                        if (d < zBuffer[i, j])
                        {
                            zBuffer[i, j] = d;
                            trianglesCanvas.DrawPixel(i, j, Colors.Red);
                        }
                    }

                    // Draw triangle 2
                    if (t2Shadow.IsPixelColored(i, j))
                    {
                        Point   cameraPoint = new Point(x, yOffset, y);
                        Vector3 line        = new Vector3(-x, 1, -y);

                        double d = plane2.DistanceToPlane(cameraPoint, line);

                        if (d < zBuffer[i, j])
                        {
                            zBuffer[i, j] = d;
                            trianglesCanvas.DrawPixel(i, j, Colors.Lime);
                        }
                    }
                }
            }

            trianglesCanvas.Save();
            return(trianglesCanvas);
        }