1、(1)立方体的旋转方式由鼠标和键盘按键来控制:按下鼠标左键,立方体绕x轴连续旋转;按下鼠标左键+ctrl键,立方体绕y轴连续旋转;按下鼠标右键,立方体绕z轴连续旋转。(注意:旋转的不动点在原点,正好是立方体的中心。)(2) 如果旋转的不动点不在原点,而改为点P(1,1,1),如何实现立方体绕3个坐标轴轴的旋转?(3)如果要求每按下一次鼠标按键或键盘按键,立方体旋转的角度增加5度,应如何修改程序?4. 自学教材4.2.7节。编写一个交互式程序,使其可以通过鼠标(或键盘)和菜单实现一些glu和glut对象的旋转,平移和比例缩放。(加自己的创意)二.设计思想本次试验主要是用户交互与三维物体观察的结合
2、,主要用到的函数有gluPerspective(fovy, aspect, near, far);glOrtho(left, right, bottom, top, near, far);gluLookAt(eyex, eyey, eyez, atx, aty, atz, upx, upy, upz);通过这些函数的调用可以分别在正投影和透视投影下从不同的角度来观察三维物体。三.程序清单1. #includestdafx.h#include GL/glut.hGLdouble vertices83= -1.0, -1.0, 1.0,?-1.0,1.0,1.0, 1.0,1.0,1.0,?1.0
3、,-1.0,1.0,-1.0,-1.0,-1.0, -1.0,1.0,-1.0, 1.0,1.0,-1.0, 1.0,-1.0,-1.0;GLdouble colors83=0.0,0.0,0.0, 1.0,0.0,0.0, 1.0,1.0,0.0,0.0,1.0,0.0, 0.0,0.0,1.0, 1.0,0.0,1.0, 1.0,1.0,1.0,0.0,1.0,1.0;/定义顶点和颜色的全局数组void polygon(int a, int b, int c , int d)/根据索引列表绘制多边形/* draw a polygon via list of vertices */ glBe
4、gin(GL_QUADS); glColor3dv(colorsa); glVertex3dv(verticesa); glColor3dv(colorsb); glVertex3dv(verticesb); glColor3dv(colorsc); glVertex3dv(verticesc); glColor3dv(colorsd); glVertex3dv(verticesd); glEnd(); void colorcube()/* map vertices to faces */利用表面绘制立方体 polygon(0,3,2,1); polygon(2,3,7,6); polygon
5、(0,4,7,3); polygon(1,2,6,5); polygon(4,5,6,7); polygon(0,1,5,4);void display()/* display callback, clear frame buffer and z buffer,/ and draw, swap buffers */显示回调函数 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt(1.0, 1.0, 1.0, 0.0, 0.0, 0.
6、0, 0.0, 1.0, 0.0); colorcube(); glutSwapBuffers();void myReshape(int w, int h)/设置投影方式 glViewport(0, 0, w, h); glMatrixMode(GL_PROJECTION); if (w = h) glOrtho(-2.0, 2.0, -2.0 * (GLfloat) h / (GLfloat) w, 2.0 * (GLfloat) h / (GLfloat) w, -10.0, 10.0); else glOrtho(-2.0 * (GLfloat) w / (GLfloat) h, 2.0
7、 * (GLfloat) w / (GLfloat) h, -2.0, 2.0, -10.0, 10.0); void main(int argc, char *argv) glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);/设置窗口的显示模式 glutInitWindowSize(500, 500);/指定窗口大小 glutCreateWindow(E11414103叶传军);/创建一个名为E11414103叶传军的窗口 glClearColor(0.0,0.0,0.0,0.0);/
8、指定窗口的背景色为黑色 /glShadeModel(GL_SMOOTH); glShadeModel(GL_FLAT); glutReshapeFunc(myReshape); glutDisplayFunc(display);/设置当前窗口的显示回调函数 /glEnable(GL_DEPTH_TEST); /* Enable hidden-surface-removal */ glutMainLoop();/启动主GLUT事件处理循环2.(1)#includeGLdouble vertices83= -1.0, -1.0, 1.0,-1.0,1.0,1.0, 1.0,1.0,1.0,1.0,-1.0,1.0,-1.0,-1.0,-1.0, GLdouble colors83=0.0,0.0,0.0, 1.0,0.0,0.0, int x1=1,y1=1,z1=1,x2=0,y2=0,z2=0,x3=0,y3=1,z3=0; gluLookAt(x1, y1, z1, x2, y2, z2, x3, y3, z3); /设置投影方式正投影void keyboard(unsigned char key,int x,int y) if(key=q) x1+; glutPostRedisplay(); else if(key=Q x1-;w y1+;
copyright@ 2008-2022 冰豆网网站版权所有
经营许可证编号:鄂ICP备2022015515号-1