// -*- Mode: c++ -*-
// include files
#include "uistate.h"
#include <GL/glut.h>

const int UIState::UNDEF = -1;

// to process mouse motion events we need a known mouse state
// initially unknown
int UIState::p_mousex = UIState::UNDEF;
int UIState::p_mousey = UIState::UNDEF;


// translation parameters
float UIState::p_transx = 0;
float UIState::p_transy = 0;

// initially no animation function
void ( *UIState::p_animate )( void ) = 0;
// state for animation function
float UIState::p_angle = 0;
// 3^o at a time
float UIState::p_angle_incr = 3.14159265358979323846f / 60.f;

void
UIState::ApplyModelTransform( void )
{
  glMatrixMode( GL_MODELVIEW );
  glLoadIdentity();
  glTranslatef( p_transx, p_transy, 0 );
  glRotatef( p_angle, 0, 0, 1 );
}

void
UIState::ResetModelTransform( void )
{
  p_angle = 0;
  p_transx = 0;
  p_transy = 0;
  ApplyModelTransform();
}