Esempi in C++ (Cpp) per Circle3D::closestPoint

Esempio n. 1

File: Cylinder3D.cpp Progetto: jmainpri/KrisLibrary

Real Cylinder3D::closestPoint(const Point3D& pt,Point3D& closest) const
{
  Real h = dot(pt-center,axis);
  if(h < 0) {
    Circle3D c;
    getBase(c);
    return c.closestPoint(pt,closest);
  }
  else if (h > height) {
    Circle3D c;
    getCap(c);
    return c.closestPoint(pt,closest);
  }
  else {
    Vector3 vperp = (pt-center) - h*axis;
    Real rv = vperp.norm();
    if(rv <= radius) { 
      //inside cylinder
      closest = pt;
      return 0;
    }
    else {
      closest = center + axis*h + vperp*(radius/rv);
      return rv - radius;
    }
  }
}