3.3 Function reference

const GLubyte* gl_error( )

is implemented as

message = gl_error()

bool ViewPort2World( double &wx, double &wy, double &wz, double vx, double vy, double vz)

is implemented as

success, wx, wy, wz = ViewPort2World(vx, vy, vz)

bool World2ViewPort( double &vx, double &vy, double &vz, double wx, double wy, double wz)

is implemented as

success, vx, vy, vz = World2Viewport(wx, wy, wz)