libgdx 纹理过滤器和 mipmap [英] libgdx texture filters and mipmap

问题描述

当我尝试在 LibGDX 中使用 mipmap 过滤时，没有图像出现.

When I try to use mipmap filtering in LibGDX, none of the images appear.

我是 LibGDX 的新手，我有一个简单的 2d 场景，其中包含三个旋转、缩放的圆圈.为了消除它们的锯齿，我想使用线性过滤.为了获得建议，我查看了 这篇文章，它说，对于大规模缩放的图像，mipmap 可用于提高速度或质量.

I'm new to LibGDX, and I have a simple 2d scene with three rotating, scaled circles. In order to anti-alias them, I wanted to use linear filtering. For advice, I looked to this article,which said that, for heavily scaled images, a mipmap can be used to improve speed or quality.

第一个意外的出现是，尽管我的所有图像都按比例缩小了，但如果 magFilter 是线性的，我只会看到线性过滤器.换句话说:

The first unexpected appearance was that, despite the fact that all of my images were scaled down, I would only see a linear filter if the magFilter was linear. In other words:

此代码将显示缩小图像的线性过滤器:

parentTexture.setFilter(TextureFilter.Nearest, TextureFilter.Linear);

虽然此代码不会:

parentTexture.setFilter(TextureFilter.Linear, TextureFilter.Nearest);

这似乎与 libGDX 功能相反:

void com.badlogic.gdx.graphics.Texture.setFilter(TextureFilter minFilter, TextureFilter magFilter)

这不会打扰我，除了它表明 libgdx 是错误的(不太可能)，文章是错误的(不太可能)，或者我不了解纹理过滤器.当我尝试 mipmap 过滤器时，后者似乎特别有可能.

This would not bother me, except that it indicates that either libgdx is wrong (unlikely), the article is wrong (unlikely), or I don't understand texture filters. The latter seems especially likely when I try mipmap filters.

此代码不显示任何内容

parentTexture.setFilter(TextureFilter.MipMapLinearLinear, TextureFilter.Linear);

此代码显示，但使用最接近的过滤

parentTexture.setFilter(TextureFilter.Linear, TextureFilter.MipMapLinearLinear);

任何我错在哪里的解释将不胜感激.我在其他地方搜索过，但 libGDX 中的纹理过滤器非常具体，所以除了文章之外，我没有找到太多帮助.

Any explanation of where I'm wrong would be greatly appreciated. I have searched elsewhere, but texture filters in libGDX is pretty specific, so aside from the article, I haven't found much to help.

推荐答案

我也遇到了同样的问题，但修复起来非常简单.创建 Texture 时，需要指定它使用 mipmap.

I had this same problem, and the fix turned out to be insanely simple. When you create a Texture, you need to specify that it uses mipmaps.

您所要做的就是将第二个参数传递给 Texture 构造函数，如下所示:

All you have to do is pass a second parameter to the Texture constructor like this:

Texture myTexture = new Texture(Gdx.files.internal("myImage.png"), true);

您可以在此处查看 API 文档中的所有 Texture 类构造函数:http://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/graphics/Texture.html

You can view all the Texture class constructors in the API docs here: http://libgdx.badlogicgames.com/nightlies/docs/api/com/badlogic/gdx/graphics/Texture.html

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