OpenGL 'reshape()' 函数视口边框背景 [英] OpenGL 'reshape()' function Viewport Border Background

问题描述

我已经在 OpenGL 3.2+ 程序中使用 Win32 创建了一个窗口，并且正在试验中.目前我正在使用下面的 reshape() 函数来调整窗口大小等

I've created a window using Win32 in an OpenGL 3.2+ program and I'm experimenting with things. Currently I'm using the reshape() function below to resize the window etc.

我在视口内添加了一个边框，因此它在视口周围留下了一个 50 像素的边框，这符合我的预期.

I've added a border within the viewport so it leaves a 50px border around the viewport which does what I was expecting.

    void reshape(int width, int height, int pers_Dist)
    {
      screenWidth = width;
      screenHeight = height;
      float border = 50;

      glViewport(0+border,0+border,width-(border*2),height-(border*2));

      MatrixRoutines<float>::perspective(pers_Dist, (GLfloat)screenWidth/(GLfloat)screenHeight, 1, 200, ProjectionMatrix);
    }

背景颜色在 init() 函数内部使用:glClearColor(0.0,0.0,0.0,0.0); 设置为黑色.

The background colour is set inside the init() function using: glClearColor(0.0,0.0,0.0,0.0);, to black.

我的问题是，边框可以为背景指定不同的颜色吗?(如果我改变颜色，背景和边框总是设置的颜色).

My question is, can the border be assigned a different colour to the background? (if I change the colour, both the background and border are always the colour set).

推荐答案

使用 剪刀区域告诉OpenGL在哪里清除:

Use scissor regions to tell OpenGL where to clear:

1. glDisable( GL_SCISSOR_TEST )
2. 用边框颜色清除
3. 将剪刀设置为边界区域
4. glEnable(GL_SCISSOR_TEST)
5. 内部颜色清晰
6. 渲染场景

这篇关于OpenGL 'reshape()' 函数视口边框背景的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！