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  LibGDX - change the brightness of a texture  (Read 543 times)
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Offline israelg99

Junior Member





« Posted 2014-01-23 15:47:07 »

Hello folks,
I am trying to achieve a lighting effect, and for that i need to change the brightness of my textures / blocks.

However, everything works except the last part, how can i change the brightness of a texture in libGDX? and it must be performance friendly.

I searched this with my friend google, but he couldn't find anything useful.. or maybe i just a bad searcher..

Any ideas folks?
Thanks in advance and see you later programmers.
Offline israelg99

Junior Member





« Reply #1 - Posted 2014-01-24 12:35:15 »

It's impossible? no answers and google cant find answers..
Offline xsvenson
« Reply #2 - Posted 2014-01-24 13:13:52 »

It's not impossible.
I myself have not needed that effect but here are 2 links after searching "opengl texture brightness"
http://stackoverflow.com/questions/1325088/altering-brigthness-on-opengl-texture
http://stackoverflow.com/questions/1506299/applying-brightness-and-contrast-with-opengl-es

Note that LibGDX uses GLES so the second link might be more relevant.

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Offline israelg99

Junior Member





« Reply #3 - Posted 2014-01-24 13:18:27 »

It's not impossible.
I myself have not needed that effect but here are 2 links after searching "opengl texture brightness"
http://stackoverflow.com/questions/1325088/altering-brigthness-on-opengl-texture
http://stackoverflow.com/questions/1506299/applying-brightness-and-contrast-with-opengl-es

Note that LibGDX uses GLES so the second link might be more relevant.

Ohhh i searched - " LibGDX texture brightness"  Smiley
thanks for the links
Offline kingroka123

JGO Knight


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« Reply #4 - Posted 2014-01-25 02:36:07 »

In my game I just use
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4  
batch.setColor(brightness,brightness,brightness,alpha);
//render texture and/or overlay
batch.setColor(1f,1f,1f,1f);//reset the color
//

I have a tile based lighting system though. If you want better lighting, I would use shaders

Offline davedes
« Reply #5 - Posted 2014-01-25 02:45:15 »

See here:
https://github.com/mattdesl/lwjgl-basics/wiki/LibGDX-Brightness-&-Contrast

Offline israelg99

Junior Member





« Reply #6 - Posted 2014-01-25 11:20:31 »

In my game I just use
1  
2  
3  
4  
batch.setColor(brightness,brightness,brightness,alpha);
//render texture and/or overlay
batch.setColor(1f,1f,1f,1f);//reset the color
//

I have a tile based lighting system though. If you want better lighting, I would use shaders
Thanks, i have block based map, and i used GLSL but it bugs my textures.. nobody could find the problem so i decided to do light with libGDX.
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