#include <windows.h>//#include <GLUT/glut.h>#include <GL/glut.h>#include <math.h>#include <iostream>using namespace std;#define GL_PI 3.1415fvoid RenderScene(){    //glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);    static GLdouble dRadius = 10;    static GLdouble dAngle = 0.0;    //glClearColor(0.0f,0.0f,1.0f,0.0f);    if(dAngle==0.0)        glClear(GL_COLOR_BUFFER_BIT);    glPointSize(10.0);    glBegin(GL_POINTS);        glVertex2d(dRadius*cos(dAngle),dRadius*sin(dAngle));    glEnd();    dRadius *= 1.01;    dAngle += 0.1;    if(dAngle > GL_PI)    {        dRadius = 10;        dAngle = 0.0;    }    //glutSwapBuffers();    glFlush();}void ChangeSize(GLsizei w,GLsizei h){    if(h==0)        h = 1;    //glutPostRedisplay();    GLfloat aspectRatio = (GLfloat)w/(GLfloat)h;    glViewport(0,0,w,h);    glMatrixMode(GL_PROJECTION);    glLoadIdentity();    if(w<=h)        glOrtho(-100,100,-100/aspectRatio,100/aspectRatio,100.0,-100.0);    else        glOrtho(-100*aspectRatio,100*aspectRatio,-100,100,100.0,-100.0);    glMatrixMode(GL_MODELVIEW);    glLoadIdentity();}void SetupRC(){    glClearColor(0.0f,0.0f,1.0f,1.0f);    glColor3f(1.0f,0.0f,0.0f);}void TimerFunction(int value){    glutPostRedisplay();    glutTimerFunc(33,TimerFunction,1);}int main(int argc, char *argv[]){   glutInit(&argc,argv);   glutInitDisplayMode(GLUT_SINGLE|GLUT_RGB|GLUT_DEPTH);   glutInitWindowSize(800,600);   glutCreateWindow("Simple");   glutDisplayFunc(RenderScene);   glutReshapeFunc(ChangeSize);   glutTimerFunc(33,TimerFunction,1);   SetupRC();   glutMainLoop();   return 0;}