我的lwjgl立方体无法正确渲染。

Question

我按照这里提供的OpenGL教程进行操作，此教程是作为此问题顶级答案所提供的。但我的立方体无法渲染前面和后面的面，其他所有面均能正常渲染，金字塔也有同样的问题。以下是源代码：

public void render(){
    GL11.glMatrixMode(GL11.GL_PROJECTION);
    GL11.glLoadIdentity();
    GL11.glOrtho(0, Display.getDisplayMode().getWidth(), 0, Display.getDisplayMode().getHeight(), -1, 1);
    GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_STENCIL_BUFFER_BIT); //clear screen

    //Center square according to screen size
    GL11.glPushMatrix();
    if(Display.wasResized()){
        MX = 0; //MX is mouse X position
        MY = 0; //MY is mouse Y position
    }
    if((MX == 0 && MY ==0)){
        GL11.glTranslatef((Display.getWidth()/2), (Display.getHeight()/2), 0.0f);
    }else{
        GL11.glTranslatef(MX+50, MY+50, 0.0f);
    }
    GL11.glRotatef(angle, 0.0f,1.0f,0.5f); //Angle is the angle of the quads rotation
    GL11.glBegin(GL11.GL_QUADS);

    GL11.glColor3f(0.0f,1.0f,0.0f);
    GL11.glVertex3f(50.0f, 50f, -50f);
    GL11.glVertex3f(-50.0f, 50f, -50f);
    GL11.glVertex3f(-50.0f, 50f, 50f);
    GL11.glVertex3f(50.0f, 50f, 50f);

    GL11.glColor3f(0.0f,0.5f,0.0f);
    GL11.glVertex3f(50.0f, -50f, 50f);
    GL11.glVertex3f(-50.0f, -50f, 50f);
    GL11.glVertex3f(-50.0f, -50f, -50f);
    GL11.glVertex3f(50.0f, -50f, -50f);

    GL11.glColor3f(1.0f,0.0f,0.0f);
    GL11.glVertex3f(50.0f, 50f, 50f);
    GL11.glVertex3f(-50.0f, 50f, 50f);
    GL11.glVertex3f(-50.0f, -50f, 50f);
    GL11.glVertex3f(50.0f, -50f, 50f);

    GL11.glColor3f(1.0f,1.0f,0.0f);
    GL11.glVertex3f(50.0f, -50f, -50f);
    GL11.glVertex3f(-50.0f, -50f, -50f);
    GL11.glVertex3f(-50.0f, 50f, -50f);
    GL11.glVertex3f(50.0f, 50f, -50f);

    GL11.glColor3f(0.0f,0.0f,1.0f);
    GL11.glVertex3f(-50.0f, 50f, 50f);
    GL11.glVertex3f(-50.0f, 50f, -50f);
    GL11.glVertex3f(-50.0f, -50f, -50f);
    GL11.glVertex3f(-50.0f, -50f, 50f);

    GL11.glColor3f(1.0f,0.0f,1.0f);
    GL11.glVertex3f(50.0f, 50f, -50f);
    GL11.glVertex3f(50.0f, 50f, 50f);
    GL11.glVertex3f(50.0f, -50f, 50f);
    GL11.glVertex3f(50.0f, -50f, -50f);

    GL11.glEnd();
    GL11.glPopMatrix();
}

- getynge

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我们可以来一张截图吗？这样我就知道它不是深度剔除。你能看到立方体的边缘，你期望看到另一个面吗？如果旋转它会发生什么？（在旋转调用中添加角度） - Andrew

Answer 1

看起来像是深度问题。立方体的前面超出了视锥体的前面，后面被裁剪掉了。

GL11.glOrtho(0, Display.getDisplayMode().getWidth(), 0, Display.getDisplayMode().getHeight(), -1, 1);

注意1（最后一个参数），超出此范围的任何内容都将被剪切。

实际上，您看到的是您的立方体的一部分，它被拉伸了。

- Andrew

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谢谢！我只需要将 Znear 和 Zfar 设置为 100，我的显示器就能完美地处理旋转的 3D 立方体了！谢谢！ - getynge