OpenGL中创建一个球体动画,使球体在窗口内做自由落体运动.

1、计算机图形学实验报告1、实验目的和要求利用第七章所学的知识，试在 OpenGL 中创建一个球体动画，使球体在窗口内做 自由落体运动，并在撞击地面后能够反弹回来。并用相应的代码表示出来。2、实验内容利用 glutSolidSphere 函数等其它函数，在 OpenGL 中创建一个球体动画，使球体 在窗口内做自由落体运动，并在撞击地面后能够反弹回来3、实验步骤1）相关算法及原理描述我们所使用的 glut 实用工具中，正好就有一个绘制球体的现成函数: glutSolidSphere，这个函数在“原点”绘制出一个球体。由于坐标是可以通过 glTranslate*和 glRotate*两个函数进行随意变

2、换的，所以我们就可以在任意位置绘 制球体了。2）运行结果 如下图，程序调试成功，并且能正常显示4、实验总结通过本次试验，进一步认识，感觉 OpenGL 的功能很强大，各种各样的物理模拟 实验他都不在话下！ ！不得不说，这软件很好很强大!由于自己不太擅长编程, 所以有些功能还不能完全实现，但我会尽自己最大努力来克服自己的编程不足之 处，多加练习。5、附录带注释的源程序#include glut.h#include#include#include#include#define PI 3.1415926double move=20.0;int i=0;int down=1;int count=1;d

3、ouble timeSpan=0; / 下降到底所需时间double movey=0.0;double duration=0.0;/持续时间double length=0.0;clock_t start,end;void init(void)GLfloat mat_specular=220.220,220.0,220.0,220.0;GLfloat mat_shininess=100.0;GLfloat light_position=0.0, 0.0, 0.0, -2.0; /r-l u-d f-bGLfloat ambientLight = 0.2f, 0.2f, 0.2f, 1.0f ;G

4、Lfloat diffuseLight = 0.6f, 0.6f, 0.6f, 1.0f ;GLfloat specular = 1.0f, 1.0f, 1.0f, 1.0f;glClearColor(0.2,0.2,1.5,2.0); /bgc glColor3ub(100, 100, 215);glShadeModel(GL_SMOOTH);glMaterialfv(GL_FRONT,GL_SPECULAR,mat_specular);glMaterialfv(GL_FRONT,GL_SHININESS,mat_shininess);glLightfv(GL_LIGHT0,GL_AMBIE

5、NT,ambientLight);glLightfv(GL_LIGHT0,GL_DIFFUSE,diffuseLight);glLightfv(GL_LIGHT0,GL_SPECULAR,specular);glLightfv(GL_LIGHT0,GL_POSITION,light_position);glEnable(GL_LIGHTING);glEnable(GL_LIGHT0); glEnable(GL_DEPTH_TEST);void reshape(int w,int h)glViewport(0,0,(GLsizei)w,(GLsizei)h); glMatrixMode(GL_P

6、ROJECTION);glLoadIdentity();if(w19.932) move=20;down=1;printf(%i,down);start=clock();display();glLoadIdentity();void MoveSphereDown()if(count=1)start=clock();count=0;end=clock();duration = (double)(end - start) /CLOCKS_PER_SEC;length=5*duration*duration;move=20-length;if(move-20) timeSpan=duration;

7、/记下下降所经历的时间 move=-20;start=clock();down=0;/向上运动display();glLoadIdentity();void TimerFunc2(int value)if(i=0) /leftGLfloat light_position=2.0,0.0,0.0,0.0; /r-l u-d f-bglLightfv(GL_LIGHT0,GL_POSITION,light_position);if(i=1) /left-upGLfloat light_position=2.0,2.0,0.0,0.0; /r-l u-d f-bglLightfv(GL_LIGHT0

8、,GL_POSITION,light_position);if(i=2) /upGLfloat light_position=0.0,2.0,0.0,0.0; /r-l u-d f-bglLightfv(GL_LIGHT0,GL_POSITION,light_position);if(i=3) /up-rightGLfloat light_position=-2.0,2.0,0.0,0.0; /r-l u-d f-bglLightfv(GL_LIGHT0,GL_POSITION,light_position);if(i=4) /rightGLfloat light_position=-2.0,

9、0.0,0.0,0.0; /r-l u-d f-bglLightfv(GL_LIGHT0,GL_POSITION,light_position);if(i=5) /right-downGLfloat light_position=-2.0,-2.0,0.0,0.0; /r-l u-d f-bglLightfv(GL_LIGHT0,GL_POSITION,light_position);if(i=6) /downGLfloat light_position=0.0,-2.0,0.0,0.0; /r-l u-d f-bglLightfv(GL_LIGHT0,GL_POSITION,light_po

10、sition);if(i=7) /down-leftGLfloat light_position=2.0,-2.0,0.0,0.0; /r-l u-d f-bglLightfv(GL_LIGHT0,GL_POSITION,light_position);i=(+i)%8;/控制小球旋转的glutTimerFunc(60,TimerFunc2,1);void TimerFunc1(int value)if(down=1)MoveSphereDown();if(down=0)MoveSphereUp();glutTimerFunc(10,TimerFunc1,0);int main(int argc,char *argv)glutInit(&argc,argv); glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB);glutInitWindowSize(400,740); glutInitWindowPosition(300,20);glutCreateWindow(a