public Color ColorCastAtPrimitive(ref Ray ray, int depth)
{
HitInfo hi = new HitInfo();
Primitive nearestHit = null;
nearestHit = CastAtPrimitive(ref ray, ref hi);
if (nearestHit != null)
{
MultiColor baze = new MultiColor();
baze.diffuse = new Color(1, 1, 1);
baze.specular = new Color(1, 1, 1);
Triangle triHit = null;
Sphere sphHit = null;
//if (nearestHit is Triangle)
// triHit=(Triangle)nearestHit;
//if (nearestHit is Sphere)
// sphHit = (Sphere)nearestHit;
// Sphere sphHit =null;
if (nearestHit.GetMaterial().texture != null)
{
if (nearestHit is Triangle)
{
triHit = nearestHit as Triangle;
Vector3 texUV =
triHit.UVx * hi.uvw.x +
triHit.UVy * hi.uvw.y +
triHit.UVz * hi.uvw.z;
int texX = (int)((triHit.GetMaterial().texture.Width - 1) * texUV.x);
int texY = (int)((triHit.GetMaterial().texture.Height - 1) * texUV.y);
System.Drawing.Color tem = triHit.GetMaterial().texture.GetPixel(texX, texY);
baze.diffuse.Set(tem.R, tem.G, tem.B);
}
else if (nearestHit is Sphere)
{
sphHit = nearestHit as Sphere;
Console.WriteLine("xD1");
Console.ReadLine();
Vector3 hit = (hi.point - sphHit.Center) / sphHit.Radius;
double theta, phi;
Vector3 texUV = new Vector3();
theta = Math.Acos(hit.y);
phi = Math.Atan2(hit.x, hit.z);
if (phi < 0.0)
{
phi += 6.28318;
}
if (phi > 6.28318)
{
phi -= 6.28318;
}
if (theta < 0.0)
{
theta += 3.14159;
}
if (theta > 3.14159)
{
theta -= 3.14159;
}
texUV.y = (float)(phi * 0.159154); // u
texUV.x = (float)(1.0 - theta * 0.318309); // v
/*texUV = texUV*4;
* texUV.x = fmod(texUV.x, 1);
* texUV.y = fmod(texUV.y, 1);
* texUV.z = fmod(texUV.z, 1);*/
int texY = (int)((sphHit.GetMaterial().texture.Width - 1) * (1 - texUV.x));
int texX = (int)((sphHit.GetMaterial().texture.Height - 1) * texUV.y);
System.Drawing.Color tem = sphHit.GetMaterial().texture.GetPixel(texX, texY);
//Console.WriteLine((tem.R / 255.0) + "," + (tem.G / 255.0) + "," + (tem.B / 255.0));
baze.diffuse.Set(tem.R, tem.G, tem.B);
// baze.diffuse.Set(sphHit.GetMaterial().diffuseColor.Red(), sphHit.GetMaterial().diffuseColor.Green(), sphHit.GetMaterial().diffuseColor.Blue());
}
}
Color basicColor = new Color();
MultiColor result = new MultiColor();
//if (!baze.specular.isZero() && !baze.specular.isOne())
// baze.specular.Show();
foreach (Light l in scene.lights)
{
MultiColor tmpColor = new MultiColor();
tmpColor.diffuse = baze.diffuse;
tmpColor.specular = baze.specular;
l.TestColor(ref ray, ref hi, ref nearestHit, ref scene.primitives, ref tmpColor);
result.diffuse = result.diffuse + tmpColor.diffuse;
result.specular = result.specular + tmpColor.specular;
}
basicColor = result.diffuse + result.specular + scene.ambientColor * nearestHit.GetMaterial().diffuseColor;
double mirror = nearestHit.GetMaterial().mirror;
double refractive = nearestHit.GetMaterial().refractive;
if (depth > 0)
{
Color mirrorColor = new Color();
Color refractColor = new Color();
bool combine = false;
if (mirror > 0)
{
Vector3 nextRayDirection = ray.Direction.Reflect(hi.normal);
Ray nextRay = new Ray(hi.point + nextRayDirection * 0.01, nextRayDirection);
mirrorColor = ColorCastAtPrimitive(ref nextRay, depth - 1);
combine = true;
}
if (refractive > 0)
{
Vector3 refractiveDir = (ray.Direction - hi.normal * (nearestHit.GetMaterial().refractiveIndex - 1)).GetNormalized();
Ray insideRay = new Ray(hi.point - refractiveDir, refractiveDir);
HitInfo outHit = new HitInfo();
int secondResult = nearestHit.Intersect(ref insideRay, ref outHit);
if (secondResult == -1)
{
Vector3 refractiveDir2 = (insideRay.Direction + outHit.normal * (1 - nearestHit.GetMaterial().refractiveIndex)).GetNormalized();
Ray movedRay = new Ray(outHit.point + refractiveDir2 * 0.01, refractiveDir2);
refractColor = ColorCastAtPrimitive(ref movedRay, depth - 1);
}
Ray temp = new Ray(hi.point + refractiveDir * 0.01, refractiveDir);
refractColor = ColorCastAtPrimitive(ref temp, depth - 1);
combine = true;
}
if (combine)
{
Color c = basicColor * (1.0 - mirror - refractive) + mirrorColor * mirror + refractColor * refractive;
return(c);
}
else
{
return(basicColor);
}
}
else
{
return(basicColor);
}
}
else
{
return(new Color(0, 0, 0));
}
}
