[实例]OpenGL绘制茶壶（光照、三维变换）

来源：互联网发布：学校机房还原软件编辑：程序博客网时间：2024/04/28 05:04

这里仅仅提供一个实例程序，如果对opengl的相关知识了解不多，可以看看我的其他博客专题 (ฅ• . •ฅ)。

程序目标：

绘制一个茶壶，用“+、-”键来旋转茶壶，同时实现光照。

#include <windows.h>#ifdef __APPLE__#include <GLUT/glut.h>#else#include <GL/glut.h>#endif#include <stdlib.h>double angle = 0.0;void initialize(){    glClearColor(1.0,1.0,1.0,0.0);    //设置光照    const GLfloat light_ambient[]  = { 0.0f, 0.0f, 0.0f, 1.0f };    const GLfloat light_diffuse[]  = { 1.0f, 1.0f, 1.0f, 1.0f };    const GLfloat light_specular[] = { 1.0f, 1.0f, 1.0f, 1.0f };    const GLfloat light_position[] = { 2.0f, 5.0f, 5.0f, 0.0f };    const GLfloat mat_ambient[]    = { 0.7f, 0.7f, 0.7f, 1.0f };    const GLfloat mat_diffuse[]    = { 0.8f, 0.8f, 0.8f, 1.0f };    const GLfloat mat_specular[]   = { 1.0f, 1.0f, 1.0f, 1.0f };    const GLfloat high_shininess[] = { 100.0f };    glEnable(GL_CULL_FACE);    glCullFace(GL_BACK);    glEnable(GL_DEPTH_TEST);    glDepthFunc(GL_LESS);    glEnable(GL_LIGHT0);    glEnable(GL_NORMALIZE);    glEnable(GL_COLOR_MATERIAL);    glEnable(GL_LIGHTING);    glLightfv(GL_LIGHT0, GL_AMBIENT,  light_ambient);    glLightfv(GL_LIGHT0, GL_DIFFUSE,  light_diffuse);    glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular);    glLightfv(GL_LIGHT0, GL_POSITION, light_position);    glMaterialfv(GL_FRONT, GL_AMBIENT,   mat_ambient);    glMaterialfv(GL_FRONT, GL_DIFFUSE,   mat_diffuse);    glMaterialfv(GL_FRONT, GL_SPECULAR,  mat_specular);    glMaterialfv(GL_FRONT, GL_SHININESS, high_shininess);}static void resize(int width, int height){    //指定视口    glViewport(0, 0, width, height);    //投影变换---平截头体    glMatrixMode(GL_PROJECTION);    glLoadIdentity();    gluPerspective(40.0,(GLdouble)width/(GLdouble)height,0.1,10000.0);}static void display(void){    //视图变换，指定相机    glMatrixMode(GL_MODELVIEW);    glLoadIdentity();    gluLookAt(0.0,0.0,5.0, 0.0,0.0,0.0, 0.0,1.0,0.0);    //模型变换    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);    glColor3f(1.0,0.0,0.0);    glPushMatrix();    glRotatef(angle,0.0,1.0,0.0);    glutSolidTeapot(1.0);    glPopMatrix();    glutSwapBuffers();}static void key(unsigned char key, int x, int y){    switch (key)    {    case 27 :    case 'q':        exit(0);        break;    case '+':        angle++;        break;    case '-':        angle--;        break;    }    glutPostRedisplay();}/* Program entry point */int main(int argc, char *argv[]){    glutInit(&argc, argv);    glutInitWindowSize(640,480);    glutInitWindowPosition(10,10);    glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);    glutCreateWindow("GLUT Shapes");    initialize();    glutReshapeFunc(resize);    glutDisplayFunc(display);    glutKeyboardFunc(key);    glutMainLoop();    return EXIT_SUCCESS;}

程序的执行结果如下：

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