Esempi in C++ (Cpp) per vec3_t::abs

Esempio n. 1

File: geometrytools.cpp Progetto: Haider-BA/engrid

void cart2spherical(vec3_t x, double &alpha, double &beta, double &r)
{
  r = x.abs();
  static const vec3_t ex(1,0,0);
  vec3_t xy(x[0],x[1],0);
  if (x[1] >= 0) {
    alpha = angle(ex, xy);
  } else {
    alpha = 2*M_PI - angle(xy, ex);
  }
  if (xy.abs2() > 0) {
    if (x[2] >= 0) {
      beta = angle(xy, x);
    } else {
      beta = -angle(xy, x);
    }
  } else {
    beta = 0.5*M_PI;
  }
}