opengl跳动的小球.doc

/*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弹回原来的高度。*/#include#include#include#include#include#define PI 3.1415926double move = 20.0;double movex = 9.0;double stepx = -0.03;int i=0;int down=1;int count=1;double 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)printf( init);GLfloat mat_specular=220.220,220.0,220.0,220.0;GLfloat mat_shininess=70.0;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 ;GLfloat diffuseLight = 0.6f, 0.6f, 0.6f, 1.0f ;GLfloat specular = 1.0f, 1.0f, 1.0f, 1.0f;glClearColor(0.3,0.8,0.8,0.0); /bgcglColor3ub(23, 17, 215);glShadeModel(GL_SMOOTH);glMaterialfv(GL_FRONT,GL_SPECULAR,mat_specular);glMaterialfv(GL_FRONT,GL_SHININESS,mat_shininess);glLightfv(GL_LIGHT0,GL_AMBIENT,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)printf( reshape); glViewport(0,0,(GLsizei)w,(GLsizei)h); glMatrixMode(GL_PROJECTION); 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; /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)movex += stepx;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,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=-2.0,0.0,0.0,0.0; /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_position);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;glutTimerFunc(60,TimerFunc2,1);void TimerFunc1(int value)movex += stepx;if(movex = 9.0)stepx = -0.03;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(argv0);init();glutDisplayFunc(initDispla