public override Color3 colorNormal(Color3 existing, Ray r, Hit h, Shape s, Light bulb)
{
switch (shader)
{
case ProcShading.Circle:
return mapCircle(h);
case ProcShading.Texture:
return mapTexture(h);
default:
return mapSquare(h);
}
}
public override Color3 colorShadow(Color3 existing, Hit h, double factor)
{
switch (shader)
{
case ProcShading.Circle:
return Color3.shade(mapCircle(h), factor);
case ProcShading.Texture:
return Color3.shade(mapTexture(h), factor);
default:
return Color3.shade(mapSquare(h), factor);
}
}
public static Color3 specular(Ray r, Hit h, Shape s, Light bulb)
{
Color3 specular = Black;
Vector3 normal = s.calcNormal(h);
Vector3 lightDir = Point3.vectorize(bulb.Location, h.intersect);
Vector3 refDir = lightDir - (2 * (Vector3.DotProduct(lightDir, normal) / Math.Pow(normal.Abs(), 2)) * normal);
double specularDot = Vector3.DotProduct(r.direction, refDir);
if (specularDot >= 0)
{
specular = (bulb.Color * s.Material.Specular) * Math.Pow(specularDot, s.Material.Ke);
}
return(specular);
}
public override bool Equals(object obj)
{
if (obj is Color3)
{
Color3 other = (Color3)obj;
if (other.R == this.R && other.B == this.B && other.G == this.G)
{
return(true);
}
else
{
return(false);
}
}
else
{
return(false);
}
}
public override Color3 colorShadow(Color3 existing, Hit h, double factor)
{
return Color3.shade(existing, factor);
}
public override Color3 colorNormal(Color3 existing, Ray r, Hit h, Shape s, Light bulb)
{
return Color3.Black;
}
public abstract Color3 colorShadow(Color3 existing, Hit h, double factor);
public Light(Point3 location, Color3 color)
{
this._Location = location;
this._Color = color;
}
public Light(Point3 location, Color3 color)
{
this._Location = location;
this._Color = color;
}
public static Color3 floor(Color3 existing, Hit h, Plane p)
{
return Color3.Green;
}
public static Color3 operator +(Color3 c1, Color3 c2)
{
double r = ((c1.R / MAX) + (c2.R / MAX));
double g = ((c1.G / MAX) + (c2.G / MAX));
double b = ((c1.B / MAX) + (c2.B / MAX));
Color3 c = new Color3(r, b, g);
c.ScaleAndCheck();
return c;
}
public override Color3 colorShadow(Color3 existing, Hit h, double factor)
{
return(Color3.shade(existing, factor));
}
public override Color3 colorNormal(Color3 existing, Ray r, Hit h, Shape s, Light bulb)
{
return(Color3.Black);
}
public abstract Color3 colorShadow(Color3 existing, Hit h, double factor);
public abstract Color3 colorNormal(Color3 existing, Ray r, Hit h, Shape s, Light bulb);
public static Color3 shade(Color3 existing, double factor)
{
Color3 shade = Black;
shade.R = existing.R / factor;
shade.G = existing.G / factor;
shade.B = existing.B / factor;
return shade;
}
public static Color3 operator *(Color3 c1, double coef)
{
double r = ((c1.R / MAX) * (coef));
double g = ((c1.G / MAX) * (coef));
double b = ((c1.B / MAX) * (coef));
Color3 c = new Color3(r, b, g);
c.ScaleAndCheck();
return c;
}
public Pixel()
{
rect = new System.Drawing.Rectangle(0, 0, 1, 1);
color = Color3.Black;
}
private Color3 mapTexture(Hit h)
{
Color3 shadeColor = Color3.Black;
int texWidth = TextureLoader.Texture.Width;
int texHeight = TextureLoader.Texture.Height;
int row = (int)Math.Round(h.intersect.x / texWidth);
int col = (int)Math.Round(h.intersect.z / texHeight);
int startX = row * texWidth;
int startY = col * texHeight;
int texX = (int) Math.Round(Math.Abs(h.intersect.x - startX));
int texY = (int) Math.Round(Math.Abs(h.intersect.z - startY));
if (texX < TextureLoader.Texture.Width && texY < TextureLoader.Texture.Height)
{
System.Drawing.Color texColor = TextureLoader.Texture.GetPixel(texX, texY);
shadeColor = new Color3(texColor.R, texColor.G, texColor.B);
}
return shadeColor;
}
public static Color3 floor(Color3 existing, Hit h, Plane p)
{
return(Color3.Green);
}
public abstract Color3 colorNormal(Color3 existing, Ray r, Hit h, Shape s, Light bulb);
private static Color3 fireRay(Ray incomingRay, int depth, Shape fromShape)
{
double closest = Constants.FAR_AWAY;
Color3 retColor = Constants.BGCOLOR;
int whichObject = 0, hitObject = 0;
Hit finalHit = new Hit();
foreach (Shape s in layout.Shapes)
{
Hit rayHit = s.intersect(incomingRay);
whichObject++;
if (rayHit.intersect.z == Constants.FAR_AWAY)
{
continue;
}
double dist = Point3.distance(layout.Cam.Eye, rayHit.intersect);
if (dist < closest && !s.Equals(fromShape))
{
closest = dist;
hitObject = whichObject;
finalHit = rayHit;
}
}
if (hitObject <= 0)
{
return(Constants.BGCOLOR);
}
Shape hitShape = layout.Shapes[hitObject - 1];
retColor = Color3.ambient(hitShape);
// phongphongphongphongphongphongphongphongphongphongphongphongphongphongphongphongphongphongphongphongphongphongphong
Color3 diffuseColor = Color3.Black, specularColor = Color3.Black;
foreach (Light bulb in layout.Lights)
{
if (spawnShadow(bulb, finalHit, hitShape, fromShape))
{
retColor = hitShape.colorShadow(retColor, finalHit, layout.Lights.Count * 3);
}
else
{
if (hitShape is Plane)
{
retColor = hitShape.colorNormal(retColor, incomingRay, finalHit, hitShape, bulb);
}
else
{
diffuseColor += Color3.diffuse(finalHit, hitShape, bulb);
specularColor += Color3.specular(incomingRay, finalHit, hitShape, bulb);
}
}
}
if (hitShape is Sphere)
{
retColor += diffuseColor * hitShape.Material.Kd;
retColor += specularColor * hitShape.Material.Ks;
}
if (depth < Constants.MAX_DEPTH)
{
Color3 reflectColor = Color3.Black;
if (hitShape.Material.Kr > 0)
{
Ray reflectRay = new Ray();
reflectRay.start = finalHit.intersect;
Vector3 normalVec = hitShape.calcNormal(finalHit);
double c = -Vector3.DotProduct(normalVec, incomingRay.direction);
reflectRay.direction = -(incomingRay.direction + (2 * normalVec * c));
reflectRay.direction.Normalize();
reflectColor = fireRay(reflectRay, depth + 1, hitShape);
retColor += reflectColor * hitShape.Material.Kr;
}
if (hitShape.Material.Kt > 0)
{
Ray transRay = new Ray();
double indexRefract;
Vector3 normalVec = Vector3.FaceForward(hitShape.calcNormal(finalHit), -incomingRay.direction);
if (Vector3.DotProduct(-incomingRay.direction, hitShape.calcNormal(finalHit)) < 0)
{
indexRefract = Constants.REFRACTION_INDEX_SPHERE / Constants.REFRACTION_INDEX_AIR;
}
else
{
indexRefract = Constants.REFRACTION_INDEX_AIR / Constants.REFRACTION_INDEX_SPHERE;
}
double discrim = 1 + (Math.Pow(indexRefract, 2) * (Math.Pow(Vector3.DotProduct(-incomingRay.direction, normalVec), 2) - 1));
// Total internal reflection!
if (discrim < 0)
{
retColor += reflectColor * hitShape.Material.Kt;
}
else
{
discrim = indexRefract * Vector3.DotProduct(-incomingRay.direction, normalVec) - Math.Sqrt(discrim);
transRay.direction = (indexRefract * incomingRay.direction) + (discrim * normalVec);
transRay.start = finalHit.intersect;
Color3 transColor = fireRay(transRay, depth + 1, hitShape);
retColor += transColor * hitShape.Material.Kt;
}
}
}
return(retColor);
}
public Pixel()
{
rect = new System.Drawing.Rectangle(0, 0, 1, 1);
color = Color3.Black;
}