OpenGL 中的 2D 显示看起来很奇怪

发布于 2024-12-09 20:24:23 字数 748 浏览 0 评论 0原文

目前我正在用 OpenGL 编写一个视频播放器。

我这样调用 gluOrtho2D：

 gluOrtho2D(0, w, 0, h);

并输出它：

 glBegin(GL_QUADS);
      glTexCoord2f(0.0f, 0.0f); glVertex2f(0, this->height());
      glTexCoord2f(1.0f, 0.0f); glVertex2f(this->width(), this->height());
      glTexCoord2f(1.0f, 1.1f); glVertex2f(this->width(), 0);
      glTexCoord2f(0.0f, 1.0f); glVertex2f(0.0f, 0.0f);
 glEnd();

正确的输出应该是这样的：

但是我看到的是...（请注意右下角)

似乎渲染不正确。也许你会推荐我使用 sdl_opengl...但我目前在 Qt 中使用 OpenGL，所以我无法打开 SDL 窗口。

那么，我该怎么办？

原文

Currently I am writing a video player in OpenGL.

I call gluOrtho2D like this:

 gluOrtho2D(0, w, 0, h);

And output it with:

 glBegin(GL_QUADS);
      glTexCoord2f(0.0f, 0.0f); glVertex2f(0, this->height());
      glTexCoord2f(1.0f, 0.0f); glVertex2f(this->width(), this->height());
      glTexCoord2f(1.0f, 1.1f); glVertex2f(this->width(), 0);
      glTexCoord2f(0.0f, 1.0f); glVertex2f(0.0f, 0.0f);
 glEnd();

The correct output should be like:

But what I see is... (Please pay attention to the bottom right corner)

It seems that it's rendered incorrectly. Maybe you would recommend me to use sdl_opengl... But I'm currently using OpenGL in Qt, so I would not be able to open SDL windows.

So, what should I do?

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