OpenGL机器人源码：功能全面且易用

    /** 
    * program   : glutmech V1.1 
    * author    : Simon Parkinson-Bates. 
    * E-mail    : sapb@yallara.cs.rmit.edu.au 
    * Copyright Simon Parkinson-Bates. 
    * "source if freely avaliable to anyone to copy as long as they 
    *  acknowledge me in their work." 
    * 
    * Funtional features  
    * ------------------ 
    * * online menu system avaliable by pressing left mouse button 
    * * online cascading help system avaliable, providing information on 
    *   the several  key strokes and what they do. 
    * * animation sequence coded which makes the mech walk through an 
    *   environment.  Shadows will soon be added to make it look 
    *   more realistic. 
    * * menu control to view mech in wireframe or sold mode. 
    * * various key strokes avaliable to control idependently the mechs 
    *   many joints. 
    * * various key strokes avaliable to view mech and environment from  
    *   different angles 
    * * various key strokes avaliable to alter positioning of the single 
    *   light source. 
    * 
    * 
    * Program features 
    * ---------------- 
    * * uses double buffering 
    * * uses display lists 
    * * uses glut to manage windows, callbacks, and online menu. 

    * * uses glpolygonfill() to maintain colors in wireframe and solid 
    *   mode. 
    * 
    **/  
      
    /* start of compilation conditions */  
    #define SPHERE  
    #define COLOR  
    #define LIGHT  
    #define TORSO  
    #define HIP  
    #define SHOULDER  
    #define UPPER_ARM  
    #define LOWER_ARM  
    #define ROCKET_POD  
    #define UPPER_LEG  
    #define LOWER_LEG  
    #define NO_NORM  
    #define ANIMATION  
    #define DRAW_MECH  
    #define DRAW_ENVIRO  
    #define MOVE_LIGHT  
    /* end of compilation conditions */  
      
    /* start various header files needed */  
    #include <stdlib.h>  
    #include <math.h>  
    #define GLUT  
    #define GLUT_KEY  
    #define GLUT_SPEC