public bool Equals(Direction3D other)
{
return(Math.Sign(deltaX) == Math.Sign(other.deltaX) &&
Math.Sign(deltaY) == Math.Sign(other.deltaY) &&
Math.Sign(deltaZ) == Math.Sign(other.deltaZ) &&
DeltaXY.Determinant(other.DeltaXY) == 0.0 &&
DeltaXZ.Determinant(other.DeltaXZ) == 0.0 &&
DeltaYZ.Determinant(other.DeltaYZ) == 0.0);
}
public double Dot(Direction3D rhs)
{
double dotProduct = this.deltaX * rhs.DeltaX + this.deltaY * rhs.DeltaY + this.deltaZ * rhs.DeltaZ;
return(dotProduct);
}
public Direction3D Cross(Direction3D rhs)
{
return(new Direction3D(deltaY * rhs.deltaZ - deltaX * rhs.deltaY,
deltaX * rhs.deltaY - deltaX * rhs.deltaZ,
deltaX * rhs.deltaY - deltaY * rhs.deltaY));
}