VB.NET和OpenGL视口 [英] VB.NET and OpenGL Viewports

问题描述

大家好，

我回来了，还有另一个问题！！！

因此，我最近学习了如何在一个窗口中制作各种视口.
但是令我困惑的是:我需要为每个视口绘制场景吗?"
还是我做错了什么?

是为每个视口绘制场景的常规程序吗?

谢谢
Videep

Hello Everyone,

I am back with yet another question!!!

So I recently learnt how to make various viewports in one window.
But what confuses me is : "Do I need to draw the scene for every viewport?"
or I am doing something wrong?

Is it the regular procedure to draw the scene for every viewport?

Thanks
Videep

推荐答案

我猜您的窗口包含不同的视口，并且您不想为每帧重绘所有图像.

通常，在每个渲染中，我们使用glClear()调用清除后台缓冲区.
因此，我们必须重新绘制所有场景.您必须重新绘制所有视口.

如果要清除视口而不清除其外部数据，则可以使用glScissor()函数.

I guess your window consists of different viewports, and you don''t want to redraw all image for each frame.

Normally in each rendering, we clears the back buffer with glClear() call.
Therefore we have to redraw all the scene again. In your case you have to redraw all viewports.

If you want to clear a viewport without clearing the data outside of it, you can use glScissor() function.

void glScissor(	GLint  	x,
 	GLint  	y,
 	GLsizei  	width,
 	GLsizei  	height);

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