//public Color[,] Render(RenderOptions options)
//{
// var matrix = new Color[options.Resolution.X, options.Resolution.Y];
// for (var i = 0; i != options.Resolution.X; i++)
// {
// for (var j = 0; j != options.Resolution.Y; j++)
// {
// var ray = new Ray()
// {
// Direction = new Vector3((i - (options.Resolution.X / 2)) * -0.01f, -4, (j - (options.Resolution.Y / 2)) * -0.01f),
// Origin = position
// };
// matrix[i, j] = RayTrace(ray, 0, 1000);
// }
// }
// return matrix;
//}
//private Color RayTrace(Ray ray, int maxBounces, float maxLength)
//{
// var raycastResult = scene.Ray(ray);
// if (raycastResult != null)
// return raycastResult.Obj.Material.Color;
// return Color.Black;
//}
//private Color RayTrace(Ray ray, int maxBounces, float maxLength)
//{
// var raycastResult = scene.Ray(ray);
// if (raycastResult != null)
// return new Color((int)((raycastResult.Triangle.Normal.X+1)*127), (int)((raycastResult.Triangle.Normal.Y+1) * 127), (int)((raycastResult.Triangle.Normal.Z+1) * 127));
// return Color.Black;
//}
//private Color RayTrace(Ray ray, int maxBounces, float maxLength)
//{
// var bla = 2500f;
// var raycastResult = scene.Ray(ray);
// if (raycastResult != null)
// return new Color(255 - (int)((bla / 255f) * (raycastResult.Position - ray.Origin).Length), 255 - (int)((bla / 255f) * (raycastResult.Position - ray.Origin).Length), 255 - (int)((bla / 255f) * (raycastResult.Position - ray.Origin).Length));
// return Color.Black;
//}
private Color RayTrace(Ray ray, int refractBounces, int reflectBounces, float maxLength)
{
var result = scene.Ray(ray);
if (result == null)
{
return(Color.White);
}
var color = CalculateLightness(result, maxLength);
if (reflectBounces < 0)
{
return(color);
}
var reflect = ray.Direction.Reflect(result.Normal);
var r = 1 / result.Body.Material.RefractionIndex;
var cos1 = -1 * result.Normal * ray.Direction.Normalized;
var sin2 = r * (float)Math.Sqrt(1 - cos1 * cos1);
var cos2 = (float)Math.Sqrt(1 - sin2 * sin2);
var refractIn = r * ray.Direction.Normalized + (r * cos1 - cos2) * result.Normal;
if (result.Body.Material.Reflect != null)
{
color += result.Body.Material.Reflect * RayTrace(new Ray(result.Position, reflect), refractBounces, reflectBounces - 1, maxLength);
}
if (result.Body.Material.Refract != null && refractBounces >= 0)
{
color += result.Body.Material.Refract * Refract(result.Body, new Ray(result.Position, refractIn), refractBounces - 1, reflectBounces - 1, maxLength);
}
return(color);
}