openGL+VS2010的例程--旋转立方体（三维）

最新推荐文章于 2023-08-29 03:31:17 发布

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最新推荐文章于 2023-08-29 03:31:17 发布

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原文链接：http://www.cnblogs.com/yuwl26/p/4218843.html

本文介绍了一个使用OpenGL实现立方体绘制与旋转的基础教程。通过设置模型视角、使用默认立方体绘制函数，并在空闲时调整模型角度来完成立方体的绘制及旋转效果。文章详细展示了如何设置投影矩阵、视口大小、以及模型视图变换。

效果图如上：

步骤：首先，设置模型视角往后退，再旋转视角；然后，用默认绘制立方体函数绘制；最后，利用空闲对模型做角度微调。

实现代码如下：

 1 #include <GL\glut.h>
 2 
 3 GLfloat xRotated, yRotated, zRotated;
 4 
 5 void Display(void)
 6 {
 7     glClear(GL_COLOR_BUFFER_BIT);
 8     glLoadIdentity();
 9     glTranslatef(0.0,0.0,-4.0);
10     glRotatef(xRotated,1.0,0.0,0.0);
11     glRotatef(yRotated,0.0,1.0,0.0);
12     glRotatef(zRotated,0.0,0.0,1.0);
13     //glScalef(2.0,1.0,1.0);
14     glutWireCube(1.5);
15     glFlush();            //Finish rendering
16     glutSwapBuffers();
17 }
18 
19 void Reshape(int x, int y)
20 {
21     if (y == 0 || x == 0) return;  //Nothing is visible then, so return
22     //Set a new projection matrix
23     glMatrixMode(GL_PROJECTION);  
24     glLoadIdentity();
25     //Angle of view:40 degrees
26     //Near clipping plane distance: 0.5
27     //Far clipping plane distance: 20.0
28     gluPerspective(40.0,(GLdouble)x/(GLdouble)y,0.5,20.0);
29     glMatrixMode(GL_MODELVIEW);
30     glViewport(0,0,x,y);  //Use the whole window for rendering
31 }
32 static int times = 0;
33 void Idle(void)
34 {
35     times++;
36     if(times >30000)
37         times = 0;
38 
39     if(times %30000 == 0)
40     {
41         xRotated += 0.3;
42         yRotated += 0.1;
43         zRotated += -0.4;
44         Display();
45     }
46 }
47 
48 
49 int main (int argc, char **argv)
50 {
51     //Initialize GLUT
52     glutInit(&argc, argv);
53     glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);  //For animations you should use double buffering
54     glutInitWindowSize(300,300);
55     //Create a window with rendering context and everything else we need
56     glutCreateWindow("Cube example");
57     glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
58     xRotated = yRotated = zRotated = 0.0;
59     glClearColor(0.0,0.0,0.0,0.0);
60     //Assign the two used Msg-routines
61     glutDisplayFunc(Display);
62     glutReshapeFunc(Reshape);
63     glutIdleFunc(Idle);
64     //Let GLUT get the msgs
65     glutMainLoop();
66     return 0;
67 }