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Fragment shader - color by position
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Topic: Fragment shader - color by position (Read 2645 times)
Thomas.
double
Posts: 833
Fragment shader - color by position
«
on:
July 08, 2012, 09:35:45 pm »
Is possible to get color in fragment shader from current image buffer by position? I can't find any info about it on the internet...
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EgonOlsen
Administrator
quad
Posts: 12297
Re: Fragment shader - color by position
«
Reply #1 on:
July 08, 2012, 09:43:01 pm »
No, that's not possible...it would ease a lot of things, but it's not possible...
«
Last Edit: July 08, 2012, 09:47:06 pm by EgonOlsen
»
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Thomas.
double
Posts: 833
Re: Fragment shader - color by position
«
Reply #2 on:
July 08, 2012, 10:48:26 pm »
So, if I want
this
effect (windows in rooms, which deforming image), I have to render scene to target, render depth, render final effect and somehow checking it with depth? Damn it, I want just color from image buffer
edit: something like portal, which is in this tech demo ...
http://www.youtube.com/watch?v=Q9MEvP_RXCY
«
Last Edit: July 08, 2012, 10:51:09 pm by Thomas.
»
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My game for Android
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EgonOlsen
Administrator
quad
Posts: 12297
Re: Fragment shader - color by position
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Reply #3 on:
July 08, 2012, 10:55:42 pm »
Something like that...i don't know exactly how to do this, but you have no access to the framebuffer in the shader.
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Thomas.
double
Posts: 833
Re: Fragment shader - color by position
«
Reply #4 on:
July 08, 2012, 11:23:01 pm »
This is effect, that I mean (distortion is from texture), on photo. I'll try to do transparent glass.
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Fragment shader - color by position