opengl： 颜色立方体

// ccube.c
// OpenGL SuperBible
// Demonstrates primative RGB Color Cube
// Program by Richard S. Wright Jr.

#include "../../Common/OpenGLSB.h" // System and OpenGL Stuff

/*  颜色立方体 */

//旋转角度
static GLfloat xRot = 0.0f;
static GLfloat yRot = 0.0f;

//渲染回调函数
void RenderScene(void)
 {
 //清除缓冲区
 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);

 //保存矩阵
 glPushMatrix();

 //旋转
 glRotatef(xRot, 1.0f, 0.0f, 0.0f);
    glRotatef(yRot, 0.0f, 1.0f, 0.0f);

 //画六个面
 glBegin(GL_QUADS);
  // 前
  // 白色
  glColor3ub((GLubyte) 255, (GLubyte)255, (GLubyte)255);
        glVertex3f(50.0f,50.0f,50.0f);

  // 黄色
  glColor3ub((GLubyte) 255, (GLubyte)255, (GLubyte)0);
  glVertex3f(50.0f,-50.0f,50.0f);

  // 红色
  glColor3ub((GLubyte) 255, (GLubyte)0, (GLubyte)0);
        glVertex3f(-50.0f,-50.0f,50.0f);

        // 品红
        glColor3ub((GLubyte) 255, (GLubyte)0, (GLubyte)255);
        glVertex3f(-50.0f,50.0f,50.0f);

 
 // 后
  // 蓝绿
  glColor3f(0.0f, 1.0f, 1.0f);
        glVertex3f(50.0f,50.0f,-50.0f);

        // 绿色
        glColor3f(0.0f, 1.0f, 0.0f);
        glVertex3f(50.0f,-50.0f,-50.0f);
  
        // 黑色
        glColor3f(0.0f, 0.0f, 0.0f);
        glVertex3f(-50.0f,-50.0f,-50.0f);

  // 蓝色
  glColor3f(0.0f, 0.0f, 1.0f);
        glVertex3f(-50.0f,50.0f,-50.0f);
 
 // 顶面
  // 蓝绿
        glColor3f(0.0f, 1.0f, 1.0f);
        glVertex3f(50.0f,50.0f,-50.0f);

  // 白色
  glColor3f(1.0f, 1.0f, 1.0f);
  glVertex3f(50.0f,50.0f,50.0f);

  // 品红
  glColor3f(1.0f, 0.0f, 1.0f);
        glVertex3f(-50.0f,50.0f,50.0f);

  // 蓝色
  glColor3f(0.0f, 0.0f, 1.0f);
        glVertex3f(-50.0f,50.0f,-50.0f);
 
 // 底面
  // 绿色
  glColor3f(0.0f, 1.0f, 0.0f);
  glVertex3f(50.0f,-50.0f,-50.0f);

  // 黄色
  glColor3f(1.0f, 1.0f, 0.0f);
  glVertex3f(50.0f,-50.0f,50.0f);

  // 红色
  glColor3f(1.0f, 0.0f, 0.0f);
  glVertex3f(-50.0f,-50.0f,50.0f);

  // 黑色
  glColor3f(0.0f, 0.0f, 0.0f);
  glVertex3f(-50.0f,-50.0f,-50.0f);

 // 左面
  // 白色
  glColor3f(1.0f, 1.0f, 1.0f);
  glVertex3f(50.0f,50.0f,50.0f);

  // 蓝绿色
  glColor3f(0.0f, 1.0f, 1.0f);
  glVertex3f(50.0f,50.0f,-50.0f);

  // 滤色
  glColor3f(0.0f, 1.0f, 0.0f);
  glVertex3f(50.0f,-50.0f,-50.0f);

  // 黄色
  glColor3f(1.0f, 1.0f, 0.0f);
  glVertex3f(50.0f,-50.0f,50.0f);

 // 右面
  // 品红
  glColor3f(1.0f, 0.0f, 1.0f);
  glVertex3f(-50.0f,50.0f,50.0f);

  // 蓝色
        glColor3f(0.0f, 0.0f, 1.0f);
        glVertex3f(-50.0f,50.0f,-50.0f);

  // 黑色
  glColor3f(0.0f, 0.0f, 0.0f);
  glVertex3f(-50.0f,-50.0f,-50.0f);

  // 红色
  glColor3f(1.0f, 0.0f, 0.0f);
        glVertex3f(-50.0f,-50.0f,50.0f);
    glEnd();

    glPopMatrix();

 glutSwapBuffers();
 }

void SetupRC()
 {
 glClearColor(0.0f, 0.0f, 0.0f, 1.0f );

 glEnable(GL_DEPTH_TEST);
 glEnable(GL_DITHER);
 glShadeModel(GL_SMOOTH);
 }

/////////////////////////////////////////////////
void SpecialKeys(int key, int x, int y)
 {
 if(key == GLUT_KEY_UP)
  xRot-= 5.0f;

 if(key == GLUT_KEY_DOWN)
  xRot += 5.0f;

 if(key == GLUT_KEY_LEFT)
  yRot -= 5.0f;

 if(key == GLUT_KEY_RIGHT)
  yRot += 5.0f;

    if(key > 356.0f)
        xRot = 0.0f;

    if(key < -1.0f)
        xRot = 355.0f;

    if(key > 356.0f)
        yRot = 0.0f;

    if(key < -1.0f)
        yRot = 355.0f;

    // Refresh the Window
    glutPostRedisplay();
    }

void ChangeSize(int w, int h)
    {
    GLfloat fAspect;

 if(h == 0)
  h = 1;

 glViewport(0, 0, w, h);

 glMatrixMode(GL_PROJECTION);
 glLoadIdentity();

 fAspect = (GLfloat)w / (GLfloat)h;
 gluPerspective(35.0f, fAspect, 1.0f, 1000.0f);

    glMatrixMode(GL_MODELVIEW);
    glLoadIdentity();
    glTranslatef(0.0f, 0.0f, -400.0f);
    }

int main(int argc, char* argv[])
 {
 glutInit(&argc, argv);
 glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);
 glutInitWindowSize(800,600);
        glutCreateWindow("RGB Cube");
 glutReshapeFunc(ChangeSize);
 glutSpecialFunc(SpecialKeys);
 glutDisplayFunc(RenderScene);
 SetupRC();
 glutMainLoop();

 return 0;
 }