public IPixelColor Trace(IRay ray, int depth)
{
IRayHit hit = this.FindHit(ray);
if (hit == null)
{
return(this.BackGroundColor);
}
IPixelColor color = new PixelColor
{
Ambient = new RGBColor(0.0f, 0.0f, 0.0f),
Diffuse = new RGBColor(0.0f, 0.0f, 0.0f),
Specular = new RGBColor(0.0f, 0.0f, 0.0f),
Color = new RGBColor(0.0f, 0.0f, 0.0f)
};
this.World.Lights.ForEach(delegate(ILight light)
{
IPixelColor lightColor = this.Shading.GetColor(hit, light);
if (light.Type == LightType.PointLight)
{
IVector lightRayVec = new Vector(hit.Intersection, light.Position);
IRay lightRay = new Ray(hit.Intersection, lightRayVec, lightRayVec.Length());
IRayHit obstruction = this.FindHit(lightRay);
if (obstruction != null)
{
if (obstruction.IntersectShape is Sphere && obstruction.IntersectShape != hit.IntersectShape)
{
IVector vectorIntersectionToObstruction = new Vector(hit.Intersection, obstruction.Intersection);
float distanceToObstruction = vectorIntersectionToObstruction.Length();
float distanceToLight = lightRayVec.Length();
float distanceFactor = distanceToObstruction / distanceToLight;
lightColor.Color = lightColor.Color.Intensify(distanceFactor);
}
}
}
color = color.Blend(lightColor);
});
if (depth < this.MaxRecursionLevel)
{
if (hit.IntersectShape.Material.IsReflective())
{
color = color.Blend(this.Trace(hit.GetReflectionRay(), depth + 1).Intensify(hit.IntersectShape.Material.Reflection));
}
if (hit.IntersectShape.Material.IsRefractive())
{
color = color.Blend(this.Trace(hit.GetRefractionRay(), depth + 1).Intensify(hit.IntersectShape.Material.Refraction));
}
}
return(color);
}
private PixelColor[,] DrawNoiseMap(IAlgorithmTarget target, PixelColor[,] source, NoiseMap noiseMap, PixelColor baseColor, PixelColor shapeColor, double cutoffValue)
{
var random = new Random();
float random1 = (float)random.NextDouble() * random.Next(-1, 1);
float random2 = (float)random.NextDouble() * random.Next(-1, 1);
float upperBounds = Math.Max(random1, random2);
float lowerBounds = Math.Min(random1, random2);
float boundsDistance = upperBounds - lowerBounds;
target.AlgorithmPixels.ForEach
(
pixel =>
{
var position = pixel.Position;
int x = (int)position.X, y = (int)position.Y;
var value = noiseMap.GetValue(x, y);
value = value.Clamp(lowerBounds, upperBounds);
var distanceFromLowerBounds = value - lowerBounds;
var offsetValue = (boundsDistance == 0.0f) ? 0.0f : distanceFromLowerBounds / boundsDistance;
//source[y, x] = ((value * 100) >= cutoffValue) ? shapeColor.Blend(baseColor, value) : baseColor;
source[y, x] = shapeColor.Blend(baseColor, offsetValue);
}
);
return(source);
}