private async Task BeginRender()
{
var size = (width : 1920, height : 1080);
var image = default(Vector3[, ]);
await Task.Run(() =>
{
var orange = tracer.CreateMaterial(1f, .5f, .25f);
var grey = tracer.CreateMaterial(.4f, .4f, .4f);
var blue = tracer.CreateMaterial(.3f, .3f, .7f);
var glow = tracer.CreateGlowingMaterial(12f);
var slightlyGlowing = tracer.CreateGlowingMaterial(1f);
tracer.AddSphere(Vector3.UnitZ * 4 - Vector3.UnitX * .5f, 1f, orange);
tracer.AddSphere(Vector3.UnitZ * 3 + Vector3.UnitX * .35f - Vector3.UnitY * .25f, .25f, grey);
tracer.AddSphere(Vector3.UnitZ * 3.2f - Vector3.UnitX * .45f - Vector3.UnitY * .45f, .25f, glow);
tracer.AddSphere((Vector3.UnitZ * 4 + Vector3.UnitY * 3.5f - Vector3.UnitX * .4f) * 6, 27f, blue);
tracer.AddSphere(Vector3.UnitZ * 2 + Vector3.UnitX * 4 - Vector3.UnitY * 3.5f, 3f, slightlyGlowing);
tracer.AddSphere(Vector3.UnitZ * 3 + Vector3.UnitX * .45f - Vector3.UnitY * .35f, .25f, glow);
var camera = tracer.CreateCamera();
image = camera.Snapshot(size.width, size.height, 24, 24);
});
var bitmap = new WriteableBitmap(size.width, size.height);
bitmap.ForEach((x, y) =>
{
var sample = image[x, y] * 44.5f;
sample.X = 1 - (float)Math.Exp(-sample.X);
sample.Y = 1 - (float)Math.Exp(-sample.Y);
sample.Z = 1 - (float)Math.Exp(-sample.Z);
sample *= 255;
sample.Y = Math.Max(0, Math.Min(255, sample.Y + ((float)r.NextDouble() * 2f - 1f)));
sample.Z = Math.Max(0, Math.Min(255, sample.Z + ((float)r.NextDouble() * 2f - 1f)));
sample.X = Math.Max(0, Math.Min(255, sample.X + ((float)r.NextDouble() * 2f - 1f)));
return(Color.FromArgb(255, (byte)sample.X, (byte)sample.Y, (byte)sample.Z));
});
screen.Source = bitmap;
}
