public double Dist(PVector p)
{
return (this - p).Magnitude;
}
public double AngleBetween(PVector p)
{
return Math.Acos(this.Dot(p)/p.Magnitude/this.Magnitude);
}
public double Dot(PVector p)
{
return X * p.X + Y * p.Y + Z * p.Z;
}
public PVector Cross(PVector p)
{
return new PVector(Z*p.Y - Y*p.Z, Z*p.Z - X*p.Z, X*p.Y - Y*p.X);
}
public PVector Add(PVector p)
{
return new PVector(X + p.X, Y + p.Y, Z + p.Z);
}
public PVector Subtract(PVector p)
{
return new PVector(X - p.X, Y - p.Y, Z - p.Z);
}
public double AngleBetween(PVector p)
{
return(Math.Acos(this.Dot(p) / p.Magnitude / this.Magnitude));
}
protected double Noise(double x, double y, double z)
{
// http://webstaff.itn.liu.se/~stegu/TNM022-2005/perlinnoiselinks/perlin-noise-math-faq.html
var pv = new PVector(x, y, z);
// Find the four points around (x,y,z)
double xf = Math.Floor(x);
double yf = Math.Floor(y);
double zf = Math.Floor(z);
var points = new[]
{
new PVector(xf, yf, zf), new PVector(xf, yf, zf+1), new PVector(xf, yf+1, zf),
new PVector(xf, yf+1, zf+1), new PVector(xf+1, yf, zf), new PVector(xf+1, yf, zf+1),
new PVector(xf+1, yf+1, zf), new PVector(xf+1, yf+1, zf+1)
};
var a = new double[8];
for(int i = 0; i < 8; i++)
{
var grad = new PVector(Random(1.0), Random(1.0));
a[i] = grad * (pv - points[i]);
}
throw new NotImplementedException();
}
public double Dist(PVector p)
{
return((this - p).Magnitude);
}
public PVector Cross(PVector p)
{
return(new PVector(Z * p.Y - Y * p.Z, Z * p.Z - X * p.Z, X * p.Y - Y * p.X));
}
public double Dot(PVector p)
{
return(X * p.X + Y * p.Y + Z * p.Z);
}
public PVector Subtract(PVector p)
{
return(new PVector(X - p.X, Y - p.Y, Z - p.Z));
}
public PVector Add(PVector p)
{
return(new PVector(X + p.X, Y + p.Y, Z + p.Z));
}
