#include <GL/glut.h>
#include <iostream>
#include <cstdlib>
using namespace std;

typedef unsigned char uchar;

void disp(void);
void drawAxis(void);
void keyb(uchar key, int x, int y);

int main(int argc,char **argv){

  glutInit(&argc,argv);
  glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE);
  glutCreateWindow("Axis4");
  glClearColor(0.0,0.0,0.0,0.0);
  glutDisplayFunc(disp);
  glutKeyboardFunc(keyb);
  glutMainLoop();
}


void disp(void){
  glClear(GL_COLOR_BUFFER_BIT);
  drawAxis();

  // store the position
  glPushMatrix(); 
  // rotate 45 degrees around the Z axis
  glRotatef(45,0.0,0.0,1.0);
  // move 0.5 in the positive X direction
  glTranslatef(0.5,0.0,0.0);

  // draw the white teapot.
  glColor3f(1.0,1.0,1.0);

  glutSolidTeapot(0.1);
  
  // return to the original position
  glPopMatrix();
  // save the original position
  glPushMatrix();

  // move 0.5 in the positive X direction
  glTranslatef(0.5,0.0,0.0);
  // rotate 45 degrees around the Z axis
  glRotatef(45,0.0,0.0,1.0);

  // make it a yellow one
  glColor3f(1.0,1.0,0.0);
  // this is a teapot which is FIRST rotated 
  // and AFTER that translated.
  glutSolidTeapot(0.1);

  glPopMatrix();
  glutSwapBuffers();
}


void drawAxis(){
  glBegin(GL_LINES);
  glColor3f(1.0,0.0,0.0);
  glVertex3f(0.0,0.0,0.0);
  glVertex3f(0.80,0.0,0.0);
  glColor3f(0.0,1.0,0.0);
  glVertex3f(0.0,0.0,0.0);
  glVertex3f(0.0,0.80,0.0);
  glColor3f(0.0,0.0,1.0);
  glVertex3f(0.0,0.0,0.0);
  glVertex3f(0.0,0.0,0.80);
  glEnd();
}


void keyb(uchar k, int x, int y){
  if(k == 'q'){
    exit(0);
  }
}