OpenGL--SUN-MOON-EARTH.rar_open

#include <GL/glut.h> #include<windows.h> #include<time.h> #include<stdio.h> // 太阳、地球和月亮 // 假设每个月都是30天 // 一年12个月，共是360天 static int day = 200; // day的变化：从0到359 void myDisplay0(void) { /**************************************************** 这里的内容照搬上一课的，只因为使用了双缓冲，补上最后这句 *****************************************************/ glEnable(GL_DEPTH_TEST); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_PROJECTION); glLoadIdentity(); gluPerspective(75, 1, 1, 4000000000); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt(0, -2000000000, 2000000000, 0, 0, 0, 0, 0, 1); // 绘制红色的“太阳” glColor3f(1.0f, 0.0f, 0.0f); glutSolidSphere(69600000, 20, 20); // 绘制蓝色的“地球” glColor3f(0.0f, 0.0f, 1.0f); glRotatef(day/360.0*360.0, 0.0f, 0.0f, -1.0f); glTranslatef(150000000, 0.0f, 0.0f); glutSolidSphere(15945000, 20, 20); // 绘制黄色的“月亮” glColor3f(1.0f, 1.0f, 0.0f); glRotatef(day/30.0*360.0 - day/360.0*360.0, 0.0f, 0.0f, -1.0f); glTranslatef(38000000, 0.0f, 0.0f); glutSolidSphere(4345000, 20, 20); glFlush(); glutSwapBuffers(); } void setLight(void) { static const GLfloat light_position[] = {-1.0f, -1.0f, 1.0f, 1.0f}; static const GLfloat light_ambient[] = {0.2f, 0.2f, 0.2f, 1.0f}; static const GLfloat light_diffuse[] = {1.0f, 1.0f, 1.0f, 1.0f}; static const GLfloat light_specular[] = {1.0f, 1.0f, 1.0f, 1.0f}; glLightfv(GL_LIGHT0, GL_POSITION, light_position); glLightfv(GL_LIGHT0, GL_AMBIENT, light_ambient); glLightfv(GL_LIGHT0, GL_DIFFUSE, light_diffuse); glLightfv(GL_LIGHT0, GL_SPECULAR, light_specular); glEnable(GL_LIGHT0); glEnable(GL_LIGHTING); glEnable(GL_DEPTH_TEST); } void setMatirial(const GLfloat mat_diffuse[4], GLfloat mat_shininess) { static const GLfloat mat_specular[] = {0.0f, 0.0f, 0.0f, 0.0f};// static const GLfloat mat_emission[] = {0.0f, 0.0f, 0.0f, 1.0f}; // static const GLfloat mat_diffuse[] = {0.8f, 0.8f, 0.8f, 1.0f}; glMaterialfv(GL_FRONT, GL_AMBIENT_AND_DIFFUSE, mat_diffuse); glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular); glMaterialfv(GL_FRONT, GL_EMISSION, mat_emission); glMaterialf (GL_FRONT, GL_SHININESS, mat_shininess); } double CalFrequency()//获取帧速度 { static int count; static double save; static clock_t last, current; double timegap; ++count; if( count <= 50 ) return save; count = 0; last = current; current = clock(); timegap = (current-last)/(double)CLK_TCK; save = 50.0/timegap; return save; } void myDisplay(void) { //double FPS = CalFrequency(); // printf("FPS = %f\n", FPS); // 定义一些材质颜色 const static GLfloat red_color[] = {1.0f, 0.0f, 0.0f, 1.0f}; const static GLfloat y_color[] = {0.0f, 1.0f, 1.0f, 0.3333f}; const static GLfloat blue_color[] = {0.0f, 0.0f, 1.0f, 0.5f}; glEnable(GL_DEPTH_TEST); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glMatrixMode(GL_PROJECTION); glLoadIdentity(); // 清除屏幕 gluPerspective(90, 1, 1, 120); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); gluLookAt(0, -60, 60, 0, 0, 0, 0, 0, 1); // 启动混合并设置混合因子 // glEnable(GL_BLEND); //glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); // 设置光源 setLight(); setMatirial(red_color, 30.0); //glColor3f(1.0f, 0.0f, 0.0f); glutSolidSphere(6.96, 20, 20); /* // 以(0, 0, 0.5)为中心，绘制一个半径为.3的不透明红色球体（离观察者最远） glPushMatrix(); glTranslatef(-0.5f, 0.0f, 0.5f); glutSolidSphere(0.3, 30, 30); glPopMatrix(); // 下面将绘制半透明物体了，因此将深度缓冲设置为只读 glDepthMask(GL_FALSE); */ // 绘制蓝色的“地球” //glColor3f(0.0f, 0.0f, 1.0f); setMatirial(blue_color, 30.0); glRotatef(day/360.0*360.0, 0.0f, 0.0f, -1.0f); glTranslatef(15.0000000, 0.0f, 0.0f); glutSolidSphere(1.5945000, 20, 20); // 以(0.2, 0, -0.5)为中心，绘制一个半径为.2的半透明蓝色球体（离观察者最近） /* setMatirial(blue_color, 30.0); glPushMatrix(); glTranslatef(0.2f, 0.0f, -0.5f); glutSolidSphere(0.5, 30, 30); glPopMatrix(); */ // glColor3f(1.0f, 1.0f, 0.0f); setMatirial(y_color, 30.0); glRotatef(day/30.0*360.0 - day/360.0*360.0, -0.0f, -0.0f, -1.0f); glTranslatef(38.000000, 0.0f, 0.0f); glutSolidSphere(4.345000, 20, 20); // 以(0.1, 0, 0)为中心，绘制一个半径为.15的半透明绿色球体（在前两个球体之间） /*setMatirial(green_color, 30.0); glPushMatrix(); glTranslatef(0.5, 0, 0); glutSolidSphere(0.4, 30, 30); glPopMatrix(); */ // 完成半透明物体的绘制，将深度缓冲区恢复为可读可写的形式 // glDepthMask(GL_TRUE); glutSwapBuffers(); glFlush(); } void myIdle(void) { /* 新的函数，在空闲时调用，作用是把日期往后移动一天并重新绘制，达到动画效果 */ ++day; if( day >= 360 ) day = 0; Sleep(10); myDisplay(); } int main(int argc, char *argv[]) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE); // 修改了参数为GLUT_DOUBLE glutInitWindowPosition(100, 100); glutInitWindowSize(800, 800); glutCreateWindow("太阳，地球和月亮"); // 改了窗口标题 glutDisplayFunc(&myDisplay); glutIdleFunc(&myIdle); // 新加入了这句 glutMainLoop(); return 0; }