opengl画布不更新

Question

我正在编写我的第一个 opengl 程序，并希望通过单击鼠标来更改形状的颜色，但它不起作用。 这是我的代码......我有什么错？

float red = 1.0f, green = 1.0f, blue = 1.0f;
public void init(GLAutoDrawable drawable)
{
    GL2 gl=drawable.getGL().getGL2();
    gl.glClearColor(0.0f,0.0f,0.0f,0.0f);
}
public void display(GLAutoDrawable drawable)
{
    GL2 gl=drawable.getGL().getGL2();
    gl.glClear(GL2.GL_COLOR_BUFFER_BIT);
    gl.glColor3f (red, green, blue);

    gl.glBegin(GL2.GL_LINES);
    gl.glVertex3f(0.5f,0.5f,0.1f);
    gl.glVertex3f(-0.5f,-0.5f,0.0f);
    gl.glEnd();
    gl.glFlush();   

    gl.glRectf(0.0f,0.0f,0.5f,-0.5f);
    gl.glRectf(0.0f,0.0f,-0.5f,0.5f);
    gl.glFlush();           
}
public void reshape(GLAutoDrawable drawable, int x,int y,int width,int height){}
public void dispose(GLAutoDrawable drawable){}
public void mouseClicked(MouseEvent e) {        
    red = 1.0f; green = 0.0f; blue = 1.0f;
}
public void mouseEntered(MouseEvent e) {}
public void mouseExited(MouseEvent e) {}
public void mousePressed(MouseEvent e) {}
public void mouseReleased(MouseEvent e) {}

Answer 1

你的交换缓冲区调用在哪里？你是双缓冲，是吗？