private Color GetSpecularColor(Point3d point, Vector3d reflectedRay, Scene scene, float p)
{
Color lightColor = new Color(0, 0, 0);
LightSource3d light;
Vector3d vLight;
float cosLight;
Color colorLight;
for (var i = 0; i < scene.LightSources.Count; i++)
{
light = scene.LightSources[i];
if (IsViewable(light.Location, point, scene))
{
vLight = new Vector3d(point, light.Location);
cosLight = Utils.CosVectors(reflectedRay, vLight);
if (cosLight > Consts.EPSILON)
{
colorLight = Color.MulColor(light.Color, Math.Pow(cosLight, p));
lightColor = Color.AddColors(lightColor, colorLight);
}
}
}
return(lightColor);
}
public void MakeRendering(Canvas canvas, Action <int> progress)
{
int w = canvas.Width;
int h = canvas.Height;
float dx = w / 2f;
float dy = h / 2f;
float focus = Camera.ProjPlaneDist;
int count = 0;
var result = Parallel.For(0, w, i =>
{
progress.Invoke(count++);
Parallel.For(0, h, j =>
{
float x = i - dx;
float y = j - dy;
var ray = new Vector3d(x, y, focus);
var color = tracing.Trace(Scene, Camera, ray);
canvas.SetPixel(i, j, color);
});
});
var grayCanvas = canvas.DetectEdgesCanvas();
Parallel.For(1, w, i =>
{
Parallel.For(1, h, j =>
{
var gray = grayCanvas.GetPixel(i, j).B;
if (gray > 10)
{
float x = i - dx;
float y = j - dy;
var c = canvas.GetPixel(i, j);
float weight = 1f / 4;
c = Color.MulColor(c, weight);
c = Color.AddColors(c, Color.MulColor(tracing.Trace(Scene, Camera, new Vector3d(x + 0.5f, y, focus)), weight));
c = Color.AddColors(c, Color.MulColor(tracing.Trace(Scene, Camera, new Vector3d(x, y + 0.5f, focus)), weight));
c = Color.AddColors(c, Color.MulColor(tracing.Trace(Scene, Camera, new Vector3d(x + 0.5f, y + 0.5f, focus)), weight));
//c = Color.AddColors(c, Color.MulColor(tracing.Trace(Scene, Camera, new Vector3d(x - 0.5f, y, focus)), weight));
//c = Color.AddColors(c, Color.MulColor(tracing.Trace(Scene, Camera, new Vector3d(x, y - 0.5f, focus)), weight));
//c = Color.AddColors(c, Color.MulColor(tracing.Trace(Scene, Camera, new Vector3d(x - 0.5f, y - 0.5f, focus)), weight));
canvas.SetPixel(i, j, c);
}
});
});
}
private Color GetLightingColor(Point3d point, Vector3d norm, Scene scene)
{
Color lightColor = new Color(0, 0, 0);
for (var i = 0; i < scene.LightSources.Count; i++)
{
var light = scene.LightSources[i];
if (IsViewable(light.Location, point, scene))
{
var vLight = new Vector3d(point, light.Location);
var cosLight = Math.Abs(Utils.CosVectors(norm, vLight));
var colorLight = Color.MulColor(light.Color, cosLight);
lightColor = Color.AddColors(lightColor, colorLight);
}
}
return(lightColor);
}
private Color CalcColor(Scene scene, Point3d vectorStart, Vector3d vector, IObject3d obj,
Point3d point, float dist, float intensity, int recursionLevel)
{
Material material = obj.GetMaterial;
Vector3d norm = obj.GetNormalVector(point);
Color objColor = obj.GetColor;
Color ambientColor = new Color();
Color diffuseColor = new Color();
Color reflectedColor = new Color();
Color specularColor = new Color();
float fogDensity = (scene.FogDestiny?.Invoke(dist)) ?? 0;
Vector3d reflectedRay = new Vector3d();
if (material.Ks != 0f || material.Kr != 0f)
{
reflectedRay = ReflectRay(vector, norm);
}
// Ambient
if (material.Ka != 0)
{
ambientColor = Color.MixColors(scene.BackgroundColor, objColor);
}
// Diffuse
if (material.Kd != 0)
{
diffuseColor = objColor;
if (scene.LightSources.Count > 0)
{
Color light_color = GetLightingColor(point, norm, scene);
diffuseColor = Color.MixColors(diffuseColor, light_color);
}
}
// Specular
if (material.Ks != 0)
{
specularColor = scene.BackgroundColor;
if (scene.LightSources.Count > 0)
{
specularColor = GetSpecularColor(point, reflectedRay, scene, material.P);
}
}
// Reflect
if (material.Kr != 0)
{
if (intensity > Consts.INTENSITY && recursionLevel < Consts.RESUCRIONLEVEL)
{
reflectedColor = Recursively(scene, point, reflectedRay, intensity * material.Kr * (1 - fogDensity),
recursionLevel + 1);
}
else
{
reflectedColor = scene.BackgroundColor;
}
}
// Result
Color resultColor = new Color(0, 0, 0);
if (material.Ka != 0)
{
resultColor = Color.AddColors(resultColor, Color.MulColor(ambientColor, material.Ka));
}
if (material.Kd != 0)
{
resultColor = Color.AddColors(resultColor, Color.MulColor(diffuseColor, material.Kd));
}
if (material.Ks != 0)
{
resultColor = Color.AddColors(resultColor, Color.MulColor(specularColor, material.Ks));
}
if (material.Kr != 0)
{
resultColor = Color.AddColors(resultColor, Color.MulColor(reflectedColor, material.Kr));
}
if (scene.FogDestiny != null)
{
resultColor = Color.AddColors(Color.MulColor(scene.BackgroundColor, fogDensity),
Color.MulColor(resultColor, 1 - fogDensity));
}
return(resultColor);
}