Function SetSurfaceView

editor/rad_hemicube.cpp:309–335

}

void SetSurfaceView(rad_surface *surf) {
  vector rv; // Random vector
  vector u, v, n;

  // Select random vector for hemicube orientation
  rv.x = ((rand() / RAND_MAX) * 2.0 - 1.0);
  rv.y = ((rand() / RAND_MAX) * 2.0 - 1.0);
  rv.z = ((rand() / RAND_MAX) * 2.0 - 1.0);

  n = rad_MaxSurface->normal; // Get patch normal

  do // Get valid u-axis vector
  {
    vm_CrossProduct(&u, &n, &rv);
  } while (vm_GetMagnitude(&u) < .0001);

  vm_NormalizeVector(&u);
  vm_CrossProduct(&v, &u, &n); // Determine v-axis

  rad_Hemicube.head_matrix.rvec = u;
  rad_Hemicube.head_matrix.uvec = v;
  rad_Hemicube.head_matrix.fvec = n;

  vm_VectorToMatrix(&rad_Hemicube.head_matrix, &n, NULL, NULL);

  rad_Hemicube.shooting_surface = surf;
}

// Build transformation matrix for our hemicube
void BuildTransform(vector *nu, vector *nv, vector *nn) {