public Triangle(Vector pointA, Vector pointB, Vector pointC, Matrices transform, Color color)
: base(transform,color)
{
this.pointA = pointA;
this.pointB = pointB;
this.pointC = pointC;
}
public static Vector CrossProduct(Vector u, Vector v)
{
Vector crossProduct = new Vector(u.y * v.z - u.z * v.y,
u.z * v.x - u.x * v.z,
u.x * v.y - u.y * v.x);
return crossProduct;
}
public Ray(Vector position, Vector direction)
{
this.position = position;
this.direction = direction;
this.intersectDistance = double.MaxValue;
this.IntersectWith = null;
this.color = Color.FromArgb(0, 0, 0);
}
public void CalculateUpperLeft()
{
Vector center = camera.GetLookFrom();
center -= camera.GetVectorW();
position = center;
upperLeft = center - camera.GetVectorU() * (worldWidth / 2)
+ camera.GetVectorV() * (worldHeight / 2);
}
public Camera(double[] param)
{
this.lookFrom = new Vector(param[0], param[1], param[2]);
this.lookAt = new Vector(param[3], param[4], param[5]);
this.up = new Vector(param[6], param[7], param[8]);
this.fovy = param[9];
CalculateUVW();
this.fovx = Func.RadianToDegree(Math.Atan(CalculateFOVX())) * 2;
}
public Camera(double LookFromX, double LookFromY, double LookFromZ,
double LookAtX, double LookAtY, double LookAtZ,
double UpX, double UpY, double UpZ,
double fovy)
{
this.lookFrom = new Vector(LookFromX, LookFromY, LookFromZ);
this.lookAt = new Vector(LookAtX, LookAtY, LookAtZ);
this.up = new Vector(UpX, UpY, UpZ);
this.fovy = fovy;
CalculateUVW();
this.fovx = Func.RadianToDegree(Math.Atan(CalculateFOVX()))*2;
}
private bool PointInTriangle(Vector pointT)
{
Vector v0 = this.pointC - this.pointA;
Vector v1 = this.pointB - this.pointA;
Vector v2 = pointT - this.pointA;
double dot00 = Vector.DotProduct(v0, v0);
double dot01 = Vector.DotProduct(v0, v1);
double dot02 = Vector.DotProduct(v0, v2);
double dot11 = Vector.DotProduct(v1, v1);
double dot12 = Vector.DotProduct(v1, v2);
double invDenom = 1 / (dot00 * dot11 - dot01 * dot01);
double u = (dot11 * dot02 - dot01 * dot12) * invDenom;
double v = (dot00 * dot12 - dot01 * dot02) * invDenom;
return (u >= 0) && (v >= 0) && (u + v < 1);
}
public Sphere(Vector center, double radius,Matrices transform, Color color)
: base(transform,color)
{
this.center = center;
this.radius = radius;
}
public void SetDirection(Vector direction)
{
this.direction = direction;
}
public void SetPosition(Vector position)
{
this.position = position;
}
private void CalculateUVW()
{
Vector a = lookFrom - lookAt;
Vector b = up;
this.w = a / a.Distance();
this.u = Vector.CrossProduct(b, this.w) / Vector.CrossProduct(b, this.w).Distance();
this.v = Vector.CrossProduct(this.w, this.u);
}
public static double DotProduct(Vector u, Vector v)
{
return u.x * v.x + u.y * v.y + u.z * v.z;
}