GLUT提供的9种实体对象

  1 #define GLUT_DISABLE_ATEXIT_HACK
  2 #include "gl/glut.h"
  3 #include 
  4 
  5 #define RADIUS 50.0f
  6 #define SIZE 100.0f
  7 
  8 #define CONE         1
  9 #define TETRAHEDRON  2
 10 #define CUBE         3
 11 #define DODECAHEDRON 4
 12 #define ICONSAHEDRON 5
 13 #define OCTAHEDRON   6
 14 #define SPHERE       7
 15 #define TOURUS       8
 16 #define TEAPOT       9
 17 #define WIRED        10
 18 
 19 GLboolean bWire=false;
 20 GLint nSelected=CONE;
 21 
 22 void OnDisplay(void);
 23 void OnReshape(int,int);
 24 void OnMenu(int value);
 25 void CreateMenu();
 26 void SetupLights();
 27 
 28 void main(int argc,char* argv[])
 29 {
 30     glutInit(&argc,argv);                                       //初始化OpenGL
 31     glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH);   //设置显示模式
 32     glutInitWindowSize(600,480);
 33     glutCreateWindow("GLUT提供的9种实体对象");
 34     
 35     glutCreateMenu(OnMenu);
 36     glutReshapeFunc(OnReshape);
 37     glutDisplayFunc(OnDisplay);
 38     
 39     CreateMenu();                //实际生成菜单
 40     SetupLights();              //设置光照
 41 
 42     
 43     glutMainLoop();             //进入OpenGL主循环
 44 }
 45 
 46 void OnDisplay(void)
 47 {
 48     glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
 49 
 50     glEnable(GL_DEPTH_TEST); //使能深度检测
 51 
 52     glPushMatrix();
 53 
 54     glColor3f(1.0f,0.0f,0.0f);
 55 
 56     glEnable(GL_NORMALIZE);  //归一化法向量
 57     switch(nSelected){
 58     case(CONE):             //圆锥体
 59         if (bWire)
 60             glutWireCone(RADIUS,2*RADIUS,30,30);
 61         else
 62             glutSolidCone(RADIUS,2*RADIUS,30,30);
 63         break;
 64 
 65     case(TETRAHEDRON):     //四面体
 66         glPushMatrix();
 67         glScalef(RADIUS,RADIUS,RADIUS);
 68         if(bWire)
 69             glutWireTetrahedron();
 70         else
 71             glutSolidTetrahedron();
 72         glPopMatrix();
 73         break;
 74 
 75     case(CUBE):   //正方体
 76         if(bWire)
 77             glutWireCube(1.5 * RADIUS);
 78         else
 79             glutSolidCube(1.5 *RADIUS);
 80         break;
 81 
 82     case(DODECAHEDRON): //正十二面体
 83         glPushMatrix();
 84         glScalef(RADIUS/2,RADIUS/2,RADIUS/2);
 85         if(bWire)
 86             glutWireDodecahedron();
 87         else
 88             glutSolidDodecahedron();
 89         glPopMatrix();
 90         break;
 91 
 92     case(ICONSAHEDRON):  //正八面体
 93         glPushMatrix();
 94         glScalef(RADIUS,RADIUS,RADIUS);
 95         if(bWire)
 96             glutWireIcosahedron();
 97         else
 98             glutSolidIcosahedron();
 99         glPopMatrix();
100         break;
101 
102     case(OCTAHEDRON):   //球体
103         glPushMatrix();
104         glScalef(RADIUS,RADIUS,RADIUS);
105         if(bWire)
106             glutWireOctahedron();
107         else
108             glutSolidOctahedron();
109         glPopMatrix();
110         break;
111 
112     case(SPHERE):   //圆环体
113         if(bWire)
114             glutWireSphere(RADIUS,30,30);
115         else
116             glutSolidSphere(RADIUS,30,30);
117         break;
118 
119     case(TOURUS):  // 茶壶
120         if(bWire)
121             glutWireTorus(RADIUS/2,RADIUS,30,30);
122         else
123             glutSolidTorus(RADIUS/2,RADIUS,30,30);
124         break;
125 
126     case(TEAPOT):
127         if(bWire)
128             glutWireTeapot(RADIUS);
129         else
130             glutSolidTeapot(RADIUS);
131     }
132 
133     glPopMatrix();
134     glutSwapBuffers();
135 }
136 
137 void OnReshape(int w,int h)
138 {
139     glViewport(0,0,w,h);
140     glMatrixMode(GL_PROJECTION);
141 
142     float aspect=(float)h/(float)w;
143 
144     if(w<=h)
145         glOrtho(-SIZE,SIZE,-SIZE*aspect,SIZE*aspect,-SIZE,SIZE);
146     else
147         glOrtho(-SIZE/aspect,SIZE/aspect,-SIZE,SIZE,-SIZE,SIZE);
148 
149     gluLookAt(10.0f,20.0f,25.0f,0.0f,0.0f,0.0f,0.0f,1.0f,0.0f);
150 }
151 
152 void OnMenu(int value)
153 {
154     if(value==WIRED)
155         bWire=!bWire;
156     else
157         nSelected=value;
158 
159     glutPostRedisplay();
160 }
161 
162 void CreateMenu()
163 {
164     glutAddMenuEntry("圆锥体",CONE);
165     glutAddMenuEntry("四面体",TETRAHEDRON);
166     glutAddMenuEntry("正方体",CUBE);
167     glutAddMenuEntry("正十二面体",DODECAHEDRON);
168     glutAddMenuEntry("正二十面体",ICONSAHEDRON);
169     glutAddMenuEntry("正八面体",OCTAHEDRON);
170     glutAddMenuEntry("球体",SPHERE);
171     glutAddMenuEntry("圆环体",TOURUS);
172     glutAddMenuEntry("茶壶",TEAPOT);
173     glutAddMenuEntry("线框或实体",WIRED);
174 
175     glutAttachMenu(GLUT_RIGHT_BUTTON);  //指定菜单事件由鼠标右键单击产生
176 
177 }
178 
179 void SetupLights()
180 {
181     GLfloat ambientLight[]={0.2f,0.2f,0.2f,1.0f};//环境光
182     GLfloat diffuseLight[]={0.9f,0.9f,0.9f,1.0f};//漫反射
183     GLfloat specularLight[]={1.0f,1.0f,1.0f,1.0f};//镜面光
184     GLfloat lightPos[]={50.0f,80.0f,60.0f,1.0f};//光源位置
185 
186     glEnable(GL_LIGHTING);                      //启用光照
187     glLightfv(GL_LIGHT0,GL_AMBIENT,ambientLight);//设置环境光源
188     glLightfv(GL_LIGHT0,GL_DIFFUSE,diffuseLight);//设置漫反射光源
189     glLightfv(GL_LIGHT0,GL_SPECULAR,specularLight);//设置镜面光源
190     glLightfv(GL_LIGHT0,GL_POSITION,lightPos);//设置灯光位置
191     glEnable(GL_LIGHT0);                              //打开第一个灯光
192 
193     glEnable(GL_COLOR_MATERIAL);                      //启用材质的颜色跟踪
194     glColorMaterial(GL_FRONT,GL_AMBIENT_AND_DIFFUSE); //指定材料着色的面
195     glMaterialfv(GL_FRONT,GL_SPECULAR,specularLight); //指定材料对镜面光的反应
196     glMateriali(GL_FRONT,GL_SHININESS,100);           //指定反射系数
197 
198 
199 }

转载于:https://www.cnblogs.com/xiacl/archive/2012/03/25/2416802.html