OpenGL Win32 动画

#include <iostream>

#include <gl\glut.h>

#include <gl\GL.h>

#include <gl\GLU.h>



#include "base.h"

using namespace std;



int x, y;



void display(void)

{

    

    glClear(GL_COLOR_BUFFER_BIT);



    glPushMatrix();



    //glBegin(GL_TRIANGLES);

    glBegin(GL_QUADS);

    glVertex2d(x, y);

    glVertex2d(x + 35, y);

    glVertex2d(x + 35, y + 35);

    glVertex2d(x, y + 35);

    glEnd();



    glPopMatrix();

//glFlush();

    glutSwapBuffers();

}

void init()

{

    glClearColor (0.0, 0.0, 0.0, 0.0);

    glColor3f(1.0, 1.0, 1.0);



    x = y = 0;

}



void reshape(int w, int h)

{

    double d = MapHeight / 600.0 / 2;

    double dw = w / 2.0 * d;

    double dh = h / 2.0 * d;

    glViewport(0,0,w,h);

    glMatrixMode(GL_PROJECTION);

    glLoadIdentity();

    gluOrtho2D(-dw, dw, -dh, dh);

    glMatrixMode(GL_MODELVIEW);

    glLoadIdentity();

    glutPostRedisplay();

}



void onTimer(int value)

{

    printf("dfd\n");

    x += 10;



    // 重绘

    glutPostRedisplay();

    glutTimerFunc(50, onTimer, 0);

}



int main(int argc, char** argv)

{

    glutInit(&argc,argv);



    glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB);



    //    glutInitWindowSize(MapWidth,MapHeight);

    double radio = MapWidth * 1.0 / MapHeight;

    glutInitWindowSize(600 * radio,600);

    glutInitWindowPosition(0,0);

    glutCreateWindow("simple");



    glutDisplayFunc(display);

    glutReshapeFunc(reshape);

    glutTimerFunc(50, onTimer, 0);



    init();



    glutMainLoop();



    //system("pause");

}