amuse/lib/Listener.cpp

#include "amuse/Listener.hpp"

namespace amuse {

static constexpr Vector3f Cross(const Vector3f& a, const Vector3f& b) {
  return {
      a[1] * b[2] - a[2] * b[1],
      a[2] * b[0] - a[0] * b[2],
      a[0] * b[1] - a[1] * b[0],
  };
}

void Listener::setVectors(const float* pos, const float* dir, const float* heading, const float* up) {
  for (int i = 0; i < 3; ++i) {
    m_pos[i] = pos[i];
    m_dir[i] = dir[i];
    m_heading[i] = heading[i];
    m_up[i] = up[i];
  }

  m_heading = Normalize(m_heading);
  m_up = Normalize(m_up);
  m_right = Normalize(Cross(m_heading, m_up));
  m_dirty = true;
}

} // namespace amuse