OpenGL暂停问题

我有以下函数用作 glutKeyboardFunc 功能参数:

void handleKeypress(unsigned char key, //The key that was pressed
                    int x, int y) {    //The current mouse coordinates
    switch (key) {
        case 27: //Escape key
            exit(0); //Exit the program
    }

    if (key == 'a')
    {
        moveCircleLeft(0);
    }
    if (key == 'w')
    {
        moveCircleUp(0);
    }
    if (key == 's')
    {
        moveCircleDown(0);
    }
    if (key == 'd')
    {
        moveCircleRight(0);
    }
}

现在我给你看 moveCircleLeft 作为一个例子 moveCircle

void moveCircleLeft(int x)
{
    characterX = characterX - 0.1;
    glutPostRedisplay();
    x++;
    if (x < 10)
    {
        glutTimerFunc(10, moveCircleLeft, x);
    }
}

其他的 characterY 相对于 characterX .