计算机图形学实验报告

1、华北电力大学科技学院实 验 报 告| 实验名称 OpenGL基本图元绘制实验 课程名称 计算机图形学 | 专业班级： 学生姓名： 学 号： 成 绩：指导教师：姜丽梅 实验日期： 二、所用仪器、设备 Windows系统，VisualC+，OpenGL及GLUT库三、实验方法与步骤先配置环境C:Program FilesMicrosoft Visual StudioVC98IncludeGLC:WINDOWSsystem32C:Program FilesMicrosoft Visual StudioVC98Lib然后通过VC+进行编译，源代码如：四：源代码实验一：#pragma comment(

2、linker, /subsystem:windows /entry:mainCRTStartup )#include #include #define DEG_TO_RAD 0.017453 static GLfloat theta = 0.0;GLfloat r = 1.0; /设置三角形的初始颜色 GLfloat g = 0.0; GLfloat b = 0.0;int singleb,doubleb;void display(void)glClear(GL_COLOR_BUFFER_BIT);/三角形换色glColor3f(r, g,b); r = r - 0.002; g = g +

3、0.002; b = b + 0.001; if(r 360.0)theta = theta - 360.0;glutPostRedisplay(); void spinDisplay1(void) glutPostRedisplay(); void myReshape(int w, int h)/指定平面上一个矩形裁剪区域，glViewport(0, 0, w, h);glMatrixMode(GL_PROJECTION);glLoadIdentity();if (w = h) gluOrtho2D(-1., 1., -1.*(GLfloat)h/(GLfloat)w, 1.*(GLfloa

4、t)h/(GLfloat)w);else gluOrtho2D(-1.*(GLfloat)w/(GLfloat)h, 1.*(GLfloat)w/(GLfloat)h, -1., 1.);void mouse(int button,int state,int x,int y) /鼠标定义 switch(button) case GLUT_LEFT_BUTTON: if(state = GLUT_DOWN ) glutIdleFunc(spinDisplay1); break; case GLUT_RIGHT_BUTTON: if(state = GLUT_DOWN) glutIdleFunc(

5、spinDisplay); break; default: break; void main(int argc, char* argv)glutInit(&argc,argv);glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);glutInitWindowPosition(100, 100);glutInitWindowSize(500, 500);glutCreateWindow(spinning square);glClearColor(0.0, 0.0, 0.0, 1.0); glutDisplayFunc(display); glutReshape

6、Func(myReshape);glutIdleFunc(spinDisplay);glutMouseFunc(mouse); glutInit(&argc,argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB); glutInitWindowPosition(600, 100);glutInitWindowSize(500, 500); doubleb=glutCreateWindow(spinning square); glClearColor(1.0, 1.0, 0.0, 0.1); glutDisplayFunc(display); glu

7、tReshapeFunc(myReshape); glutIdleFunc(spinDisplay); glutMouseFunc(mouse); glutMainLoop();实验二：#includestdafx.h#include#includeGLfloatvertices3=-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,-1.0,1.0,1.0,-1.0,1.0, 1.0,1.0,1.0,-1.0,1.0,1.0;staticGLfloattheta=0.0,0.0,0.0;staticGLintaxis=2;

8、staticGLdoubleviewer=0.0,0.0,5.0;voidpolygon(inta,intb,intc,intd)glBegin(GL_POLYGON);glVertex3fv(verticesa);glVertex3fv(verticesb);glVertex3fv(verticesc);glVertex3fv(verticesd);glEnd();voidcolorcube()/正前面glColor3f(1,1,1);polygon(4,5,6,7);/正背面glColor3f(1.0,0,0);polygon(0,3,2,1);glColor3f(0,1,0);polyg

9、on(2,3,7,6);glColor3f(0,0,1);polygon(0,4,7,3); glColor3f(1,1,0);polygon(1,2,6,5);glColor3f(0,1,1);polygon(0,1,5,4);voiddisplay()glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT); glClearDepth(1); glLoadIdentity(); /更新视点位置gluLookAt(viewer0,viewer1,viewer2,0.0,0.0,0.0,0.0,1.0,0.0);glRotatef(theta0,1.0,

10、0.0,0.0);glRotatef(theta1,0.0,1.0,0.0);glRotatef(theta2,0.0,0.0,1.0);colorcube(); glutSwapBuffers(); voidkeys(unsignedcharkey,intx,inty)/* 用 x, X, y, Y, z, and Z 键 移动视点 */ if(key=x)viewer0-=1.0;if(key=X)viewer0+=1.0;if(key=y)viewer1-=1.0;if(key=Y)viewer1+=1.0; if(key=z)viewer2-=1.0;if(key=Z)viewer2+

11、=1.0;display();voidmyReshape(intw,inth)glViewport(0,0,w,h);glMatrixMode(GL_PROJECTION);glLoadIdentity();if(w360.0)thetaaxis-=360.0; display();int _tmain(int argc, _TCHAR* argv) /glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); glutInitWindowSize(300, 300); glutCreateW

12、indow(cube); glutDisplayFunc(display); glutReshapeFunc(myReshape); glutMouseFunc(mouse); glutKeyboardFunc(keys); glEnable(GL_DEPTH_TEST); glutMainLoop();return 0;五：实验结果与数据处理实验一：程序运行后，弹出两个窗口，里面的三角形旋转的同时逐渐变色；可用鼠标控制，点击左键三角形停止旋转，点击右键三角形继续旋转。实验二：运行程序，弹出一个黑色正方形，内有一个三维的正方体，当点击鼠标时正方体会转动，正方体的各个面的颜色均不相同。 按住键盘中z，x，y可以变大变小。 六：试验结论 通过一周的试验，感觉受益匪浅，学到了很多课堂上学不到的，我进一步加深了对