private RGBA[,] Draw()
{
var camera = _cameraProvider.Get();
var config = _configProvider.Get();
var matrix = new RGBA[config.Height, config.Width];
var lightning = _lightningProvider.Get();
Console.WriteLine("Started render");
Parallel.For(0, config.Width, x =>
{
Parallel.For(0, config.Height, y =>
{
var ray = _rayProvider.Get(x, y);
var lastHitDistance = float.MaxValue;
var allHit = _objContainer.GetObjectsByRay(ray);
Parallel.ForEach(allHit, obj =>
{
if (obj.HitBy(ray, camera.Position))
{
var hitDistance = (camera.Position - obj.MidPoint).Length;
if (lastHitDistance > hitDistance)
{
lastHitDistance = hitDistance;
matrix[y, x] = lightning.Illuminate(obj);
}
}
});
});
});
Console.WriteLine("Finished render");
return(matrix);
}
public Vector3 Get(int x, int y)
{
var camera = _cameraProvider.Get();
var config = _config.Get();
var angle = MathF.Tan(config.Fov * MathF.PI / 180);
var aspectRatio = (float)config.Width / config.Height;
var projectedX = (2 * (x + 0.5f) / config.Width - 1f) * angle * aspectRatio;
var projectedY = (2 * ((y + 0.5f) / config.Height) - 1) * angle;
var direction = camera.Direction + new Vector3(projectedX, 0, projectedY) - camera.Position;
return(direction.Norm());
}
public Vector3 Get(int x, int y)
{
var camera = _cameraProvider.Get();
var config = _config.Get();
var xNorm = (x - config.Width / 2) / (float)config.Width * 2;
var yNorm = -(y - config.Height / 2) / (float)config.Height * 2;
var vec = new Vector3(xNorm, 0, yNorm);
vec -= camera.Position;
vec += camera.Direction;
return(vec.Norm());
}