OpenGL: GLUT提供的9种实体对象

代码如下：

#define GLUT_DISABLE_ATEXIT_HACK#include <math.h>#include "gl/glut.h"#pragma comment(lib, "glut32.lib")#define RADIUS 50.0f#define SIZE 100.0f#define CONE         1#define TETRAHEDRON  2#define CUBE         3#define DODECAHEDRON 4#define ICONSAHEDRON 5#define OCTAHEDRON   6#define SPHERE       7#define TOURUS       8#define TEAPOT       9#define WIRED        10GLboolean bWire = false;GLint nSelected = CONE;void OnDisplay(void){glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);glEnable(GL_DEPTH_TEST); //使能深度检测glPushMatrix();{glColor3f(1.0f, 0.0f, 0.0f);glEnable(GL_NORMALIZE);  //归一化法向量switch(nSelected){case(CONE):             //圆锥体if (bWire){glutWireCone(RADIUS, 2 * RADIUS, 30, 30);}else{glutSolidCone(RADIUS, 2 * RADIUS, 30, 30);}break;case(TETRAHEDRON):     //四面体glPushMatrix();{glScalef(RADIUS, RADIUS, RADIUS);if(bWire){glutWireTetrahedron();}else{glutSolidTetrahedron();}}glPopMatrix();break;case(CUBE):   //正方体if(bWire){glutWireCube(1.5 * RADIUS);}else{glutSolidCube(1.5 * RADIUS);}break;case(DODECAHEDRON): //正十二面体glPushMatrix();{glScalef(RADIUS/2, RADIUS/2, RADIUS/2);if(bWire){glutWireDodecahedron();}else{glutSolidDodecahedron();}}glPopMatrix();break;case(ICONSAHEDRON):  //正八面体glPushMatrix();{glScalef(RADIUS, RADIUS, RADIUS);if(bWire){glutWireIcosahedron();}else{glutSolidIcosahedron();}}glPopMatrix();break;case(OCTAHEDRON):   //球体glPushMatrix();{glScalef(RADIUS, RADIUS, RADIUS);if(bWire){glutWireOctahedron();}else{glutSolidOctahedron();}}glPopMatrix();break;case(SPHERE):   //圆环体if(bWire){glutWireSphere(RADIUS, 30, 30);}else{glutSolidSphere(RADIUS, 30, 30);}break;case(TOURUS):  // 茶壶if(bWire){glutWireTorus(RADIUS / 2, RADIUS, 30, 30);}else{glutSolidTorus(RADIUS / 2, RADIUS, 30, 30);}break;case(TEAPOT):if(bWire){glutWireTeapot(RADIUS);}else{glutSolidTeapot(RADIUS);}}}glPopMatrix();glutSwapBuffers();}void OnReshape(int w, int h){glViewport(0, 0, w, h);glMatrixMode(GL_PROJECTION);float aspect = (float)h / (float)w;if(w <= h){glOrtho(-SIZE, SIZE, -SIZE * aspect, SIZE * aspect, -SIZE, SIZE);}else{glOrtho(-SIZE / aspect, SIZE / aspect, -SIZE, SIZE, -SIZE, SIZE);}gluLookAt(10.0f, 20.0f, 25.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f, 0.0f);}void OnMenu(int value){if(value == WIRED){bWire = !bWire;}else{nSelected = value;}glutPostRedisplay();}void CreateMenu(){glutAddMenuEntry("圆锥体", CONE);glutAddMenuEntry("四面体", TETRAHEDRON);glutAddMenuEntry("正方体", CUBE);glutAddMenuEntry("正十二面体", DODECAHEDRON);glutAddMenuEntry("正二十面体", ICONSAHEDRON);glutAddMenuEntry("正八面体", OCTAHEDRON);glutAddMenuEntry("球体", SPHERE);glutAddMenuEntry("圆环体", TOURUS);glutAddMenuEntry("茶壶", TEAPOT);glutAddMenuEntry("线框或实体", WIRED);glutAttachMenu(GLUT_RIGHT_BUTTON);  //指定菜单事件由鼠标右键单击产生}void SetupLights(){GLfloat ambientLight[]  = {0.2f,  0.2f,  0.2f,  1.0f};//环境光GLfloat diffuseLight[]  = {0.9f,  0.9f,  0.9f,  1.0f};//漫反射GLfloat specularLight[] = {1.0f,  1.0f,  1.0f,  1.0f};//镜面光GLfloat lightPos[]      = {50.0f, 80.0f, 60.0f, 1.0f};//光源位置glEnable(GL_LIGHTING);//启用光照glLightfv(GL_LIGHT0, GL_AMBIENT, ambientLight);//设置环境光源glLightfv(GL_LIGHT0, GL_DIFFUSE, diffuseLight);//设置漫反射光源glLightfv(GL_LIGHT0, GL_SPECULAR, specularLight);//设置镜面光源glLightfv(GL_LIGHT0, GL_POSITION, lightPos);//设置灯光位置glEnable(GL_LIGHT0);//打开第一个灯光glEnable(GL_COLOR_MATERIAL);//启用材质的颜色跟踪glColorMaterial(GL_FRONT, GL_AMBIENT_AND_DIFFUSE);//指定材料着色的面glMaterialfv(GL_FRONT, GL_SPECULAR, specularLight); //指定材料对镜面光的反应glMateriali(GL_FRONT, GL_SHININESS, 100);           //指定反射系数}void main(int argc, char* argv[]){glutInit(&argc, argv);//初始化OpenGLglutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);   //设置显示模式glutInitWindowSize(600, 480);glutCreateWindow("GLUT提供的9种实体对象");glutCreateMenu(OnMenu);glutReshapeFunc(OnReshape);glutDisplayFunc(OnDisplay);CreateMenu();//实际生成菜单SetupLights();//设置光照glutMainLoop();//进入OpenGL主循环}

运行结果：