10月16日_昨天写的一段小程序，没有达到预期的目标_By risky

10月16日_昨天写的一段小程序，没有达到预期的目标_By risky

这段程序就是画了一个三角形，想让键盘控制它来上下左右运动，但是无论怎么钦按钮他都不运动，非常郁闷，请求支援。谢谢

#include  < stdlib.h >
#include  < gl / glut.h >
#include  < windows.h >
static  GLfloat x = 0.0 ;
static  GLfloat y = 0.0 ;
void  init()
{
    glClearColor(0.0,0.0,0.0,0.0);
}
void  display()
{
    glClear(GL_COLOR_BUFFER_BIT);
    glColor3f(0.2f,0.8f,0.6f);
    glBegin(GL_TRIANGLES);
        glVertex2f(0.0+x,0.0+y);
        glVertex2f(0.5+x,0.0+y);
        glVertex2f(0.5+x,0.5+y);
    glEnd();
    glutSwapBuffers();
    glFlush();
}
void  keyboard(unsigned  char  key, int  x, int  y)
{
    switch(key)
    {
    case 'd':
    case 'D':
        x+=0.1;
        if(x>0.5)
            x=0.5;
        glutPostRedisplay();
        break;
    case 'a':
    case 'A':
        x-=0.1;
        if(x<-1.0)
            x=-1.0;
        glutPostRedisplay();
        break;
    case 'w':
    case 'W':
        y+=0.1;
        if(y>0.5)
            y=0.5;
        glutPostRedisplay();
        break;
    case 's':
    case 'S':
        y-=0.1;
        if(y<-1.0)
            y=-1.0;
        glutPostRedisplay();
        break;
    case 27:
        exit(0);
        break;
    default:
        break;
    }
}
void  reshape( int  w, int  h)
{
    glViewport(0,0,(GLsizei)w,(GLsizei)h);
}
int  main( int  argc, char   * argv[])
{
    glutInit(&argc,argv);
    glutInitDisplayMode(GLUT_DOUBLE|GLUT_RGB);
    glutInitWindowSize(500,500);
    glutInitWindowPosition(100,100);
    glutCreateWindow(argv[0]);
    init();
    glutDisplayFunc(display);
    glutKeyboardFunc(keyboard);
    glutReshapeFunc(reshape);
    glutMainLoop();
    return 0;
}