opengl：颜色立方体

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opengl：颜色立方体

2018年04月08日 ⁄ 综合 ⁄ 共 3442字 ⁄ 字号小中大 ⁄ 评论关闭

// 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;
}