public void RayTrace(Camera camera, StringBuilder[,] logs)
{
int width = myBitmap.Width;
int height = myBitmap.Height;
var forward = camera.Right ^ camera.Top;
var xAngle = width > height ? camera.ViewAngle : camera.ViewAngle * width / height;
var yAngle = height > width ? camera.ViewAngle : camera.ViewAngle * height / width;
for (int i = 0; i < height; i++)
for (int j = 0; j < width; j++)
{
lock (LockObject)
{
Vector color = Vector.Zero;
for (int ii = 0; ii < AntiAliasPasses; ii++)
for (int jj = 0; jj < AntiAliasPasses; jj++)
{
var x = (double) (j * AntiAliasPasses + jj) / (width * AntiAliasPasses) - 0.5;
var y = (double) (i * AntiAliasPasses + ii) / (height * AntiAliasPasses) - 0.5;
var direction = camera.Right * Math.Sin(x * xAngle) +
camera.Top * Math.Sin(y * yAngle) +
forward * (Math.Cos(x * camera.ViewAngle) + Math.Cos(y * camera.ViewAngle));
var ray = new Ray(camera.Origin, direction);
myTraceDepth = 0;
color = color + TraceRay(ray, logs == null ? null : logs[j, height - 1 - i]);
}
myBitmap.SetPixel(j, height - 1 - i, ColorUtil.ToColor((color / (AntiAliasPasses * AntiAliasPasses))));
}
}
}
private void myRunButton_Click(object sender, EventArgs e)
{
FormBorderStyle = FormBorderStyle.FixedSingle;
myRunButton.Enabled = false;
myHintLabel.Text = "Step 2: Wait while the image is being rendered";
var bitmap = new Bitmap(pictureBox1.Width, pictureBox1.Height);
var tracer = new RayTracer(bitmap) {AntiAliasPasses = myAntiAliasCheckBox.Checked ? 2 : 1};
var camera = new Camera(new Vector(0, 0.3, -50), new Vector(0, 1, 0), new Vector(1, 0, 0), Math.PI / 6);
tracer.Shapes.Add(new Sphere(new Vector(0, 0, 2), 1) { Name = "Sphere#1", Texture = new CheckeredTexture(new SolidTexture(ColorUtil.ToVector(Color.Black)), new SolidTexture(ColorUtil.ToVector(Color.White)), Math.PI / 8), Diffuse = 0.5, Ambient = 0.3 });
tracer.Shapes.Add(new Sphere(new Vector(2, 2, 1.5), 0.5) { Name = "Sphere#2", Texture = new SolidTexture(ColorUtil.ToVector(Color.Green)), Diffuse = 0.8, Ambient = 0.2 });
tracer.Shapes.Add(new Sphere(new Vector(2, 0.5, 0.5), 0.5) { Name = "Sphere#3", Texture = new SolidTexture(ColorUtil.ToVector(Color.Yellow)), Diffuse = 0.8, Ambient = 0.2 });
tracer.Shapes.Add(new Sphere(new Vector(-2, 1, 1), 0.3) { Name = "Sphere#4", Texture = new SolidTexture(ColorUtil.ToVector(Color.Red)), Diffuse = 0.2, Ambient = 0.2, Reflect = 1 });
tracer.Shapes.Add(new Sphere(new Vector(-5, 0.5, 2), 0.7) { Name = "Sphere#5", Texture = new SolidTexture(ColorUtil.ToVector(Color.DeepSkyBlue)), Diffuse = 0.2, Ambient = 0.2, Reflect = 1 });
tracer.Shapes.Add(new Plane(new Vector(0, -1, 0), -10) {Texture = new SolidTexture(ColorUtil.ToVector(Color.Gray)), Diffuse = 0.8, Ambient = 0.3, Reflect = 0});
tracer.Shapes.Add(new Plane(new Vector(0, -1, 0), 10) {Texture = new SolidTexture(ColorUtil.ToVector(Color.DarkGray)), Diffuse = 0.8, Ambient = 0.3, Reflect = 0});
tracer.Shapes.Add(new Plane(new Vector(0, 0, -1), 200) {Texture = new SolidTexture(ColorUtil.ToVector(Color.Gray)), Diffuse = 0.4, Ambient = 0.3, Reflect = 0});
tracer.Shapes.Add(new Plane(new Vector(-1, 0, 0), -20) {Texture = new SolidTexture(ColorUtil.ToVector(Color.Red)), Diffuse = 0.8, Ambient = 0.2, Reflect = 0});
tracer.Shapes.Add(new Plane(new Vector(-1, 0, 0), 20) {Texture = new SolidTexture(ColorUtil.ToVector(Color.Blue)), Diffuse = 0.8, Ambient = 0.2, Reflect = 0});
tracer.Lights.Add(new SpotLight(new Vector(5, 5, 3), ColorUtil.ToVector(Color.LightGoldenrodYellow), 0.5));
tracer.Lights.Add(new SpotLight(new Vector(-1, -1, -1), ColorUtil.ToVector(Color.White), 0.1));
tracer.Lights.Add(new SpotLight(new Vector(1, 0, -1), ColorUtil.ToVector(Color.White), 0.4));
myLogs = null;
var timer = new Timer();
var stopwatch = new Stopwatch();
ThreadPool.QueueUserWorkItem(delegate
{
stopwatch.Start();
tracer.RayTrace(camera, myLogs);
BeginInvoke((MethodInvoker)delegate
{
FormBorderStyle = FormBorderStyle.Sizable;
timer.Stop();
UpdatePicture(tracer, bitmap);
myRunButton.Enabled = true;
myHintLabel.Text = "Step 3: In the dotTrace pop-up window click the 'Get Snapshot' button";
});
});
timer.Interval = 500;
timer.Tick += delegate
{
UpdatePicture(tracer, bitmap);
myTimeLabel.Text = stopwatch.Elapsed.ToString();
};
timer.Start();
}