How to scale sprites in libgdx according to screen resolutions?

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How to scale sprites in libgdx according to screen resolutions?



I am trying to scale the texture to fit the screen width. This is what I tried, but it simply repeats the texture. It does not scale it.



In the init method:


TextureLoader.TextureParameter param = new TextureLoader.TextureParameter();
param.minFilter = Texture.TextureFilter.MipMapLinearLinear;
param.genMipMaps = true;
param.wrapU = Texture.TextureWrap.ClampToEdge;
param.wrapV = Texture.TextureWrap.ClampToEdge;
manager.load("textures/texture.png", Texture.class, param);



In the render method:


Texture tex = manager.get("textures/texture.png", Texture.class);
float scale = (float)( (float)Gdx.graphics.getWidth() / (float)(tex.getWidth()));

batch.begin();
Sprite s = new Sprite(tex, 0,0,tex.getWidth(),tex.getHeight());

s.setPosition(0, 0);
s.setOriginCenter();
//s.setScale(scale);
s.setSize(Gdx.graphics.getWidth(), scale * tex.getHeight());
s.setOrigin(0,0);
s.draw(batch);
batch.end();



Does anyone have an idea what I am doing wrong? 





Looks like you are using imaginary "pixel" units, read this: blog.xoppa.com/pixels
– Xoppa
Dec 28 '15 at 17:25





Why is this so complicated?
– Z0q
Dec 28 '15 at 18:18





What is complicated?
– Xoppa
Dec 28 '15 at 18:28





Well, do I need to create a separate camera or viewport? Why isn't there a simple function like setScale() in libgdx? I mean, 3D objects simply scale the way I want, but 2D seems to make it bloated. I find the article difficult to understand too.
– Z0q
Dec 28 '15 at 19:01





@Z0q there is nothing complicated about camera and/or Viewports. Once you understood them they can make many things a lot easier. One thing you always have to remember: You DON'T want to use pixels. Devices have different resolutions and you really don't want to have a resolution-dependent game, especially not, when you are developing for android devices! So read the camera/viewport tutorials and you will see it's advantage
– Springrbua
Dec 30 '15 at 8:17


camera


Viewport


camera


viewport




1 Answer
1



Apparently this happened because I was using mipmaps. Without mipmapping, the sprites scale appropriately.


param.minFilter = Texture.TextureFilter.MipMapLinearLinear;
param.genMipMaps = true;








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