OpenGL中绘制太阳,地球,月亮的运动模型

#include <windows.h> #include <gl/glut.h> #include <math.h> #define GL_PI 3.1415f static GLfloat xRot = 0.0f; static GLfloat yRot = 0.0f; GLfloat whiteLight[] = { 0.2f, 0.2f, 0.2f, 1.0f }; GLfloat lightPos[] = { -300.0f, 50.0f, 0.0f, 1.0f }; void RenderScene(void) { static float fMoonRot=0.0f; static float fEarthRot=0.0f; // 清除颜色和深度缓冲区 glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glPushMatrix(); //把整个场景移动到视图中 glTranslatef(0.0f,0.0f,-300.0f); //设置材料颜色，太阳为黄色 glColor3ub(255,255,0); glDisable(GL_LIGHTING); glutSolidSphere(0.0f,50.0f,20.0f); glEnable(GL_LIGHTING); glLightfv(GL_LIGHT0,GL_POSITION,lightPos); //设置材料颜色，太阳为黄色 glColor3ub(255,255,0); glutSolidSphere(50.0f,50.0f,20.0f); //绘制地球 glColor3ub(0, 0, 255); glRotatef(fEarthRot, 0.0f, 1.0f, 0.0f);//绕y轴旋转坐标系统，使地球围着太阳转 glTranslatef(105.0f,0.0f,0.0f); //坐标原点沿x轴移动105 glutSolidSphere(15.0f,15.0f,15.0f); // 根据基于地球的坐标进行旋转，并绘制月球 glColor3ub(200, 200, 200); glRotatef(fMoonRot, 0.0f, 1.0f, 0.0f); glTranslatef(30.0f,0.0f,0.0f);//坐标原点沿x轴移动30 fMoonRot+=15.0f; if(fMoonRot>=365.0f) fMoonRot=0.0f; glutSolidSphere(6.0f,15.0f,15.0f); glPopMatrix(); //回复矩阵状态 fEarthRot+=5.0f; if(fEarthRot>=365.0f) fEarthRot=0.0f; //交换缓冲区 glutSwapBuffers(); } void SetupRC() { glEnable(GL_LIGHTING); glLightModelfv(GL_LIGHT_MODEL_AMBIENT,whiteLight); //使用whiteLight所指定的环境光 glLightfv(GL_LIGHT0,GL_POSITION,lightPos);//0号光源的位置 glEnable(GL_LIGHT0); glEnable(GL_DEPTH_TEST); // 启用深度测试 glEnable(GL_COLOR_MATERIAL); //使用不同颜色来贴物体表面 glClearColor(0.0f, 0.0f, 0.0f, 1.0f ); //黑色背景 } void ChangeSize(int w, int h) { GLfloat fAspect; // 防止被0所除 if(h == 0) h = 1; // 把视口设置为窗口大小 glViewport(0, 0, w, h); fAspect = (GLfloat)w/(GLfloat)h; //实际窗口的纵横比 // 重置透视坐标系统 glMatrixMode(GL_PROJECTION); //还有一个参数是L_MODELVIEW glLoadIdentity(); // 产生透视投影 gluPerspective(60.0f, fAspect, 1.0, 4000); //重置模型视图矩阵 glMatrixMode(GL_MODELVIEW); glLoadIdentity(); } void SpecialKeys(int key, int x, int y) { if(key == GLUT_KEY_UP) xRot-= 5.0f; if(key == GLUT_KEY_DOWN) xRot += 5.0f; if(key == GLUT_KEY_LEFT) yRot -= 5.0f; if(key == GLUT_KEY_RIGHT) yRot += 5.0f; xRot = (GLfloat)((const int)xRot % 360); yRot = (GLfloat)((const int)yRot % 360); glutPostRedisplay(); } // 绘制一个立方体 void TimerFunc(int value) { glutPostRedisplay(); glutTimerFunc(100, TimerFunc, 1); } //void main(void) int main(int argc, char *argv[]) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB | GLUT_DEPTH); glutInitWindowSize(800, 600); glutCreateWindow("Orthographic Projection"); glutTimerFunc(250, TimerFunc, 1); glutReshapeFunc(ChangeSize); glutSpecialFunc(SpecialKeys); glutDisplayFunc(RenderScene); SetupRC(); glutMainLoop(); return 0; }