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Change the alpha of a texture dynamically
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@Chockichoc

Posts: 3

NGLNewbie

Fri, Sep 28 2012


Hi,
I would like to change the transparency value of a Mesh by moving an UISlider.

First, I thought about change the alpha of the texture, but i need to launch "compliCoreMesh" every time the value changed ? It looks like a bad idea because it take a while to complete... no ?

Then, I thought about make one NGLView with transparent background for each Meshs. And change the alpha value of each NGLView according to the value of the UISlider. But this idea seems even worst than the previous one... It seems dangerous to build more than one instance of NGLView at the same time, isn't it ?

does anyone have an idea how to do that? Thx !
0% like this - 0/0

@dineybomfim

Posts: 571

NGLAdmin

Fri, Sep 28 2012


In response to: @Chockichoc

Yeah, in the current version there is no easy way to achieve that.

You can create a custom shader and change the final alpha color of the fragments based on your variable.
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@Chockichoc

Posts: 3

NGLNewbie

Fri, Sep 28 2012


In response to: @dineybomfim

thx ! i gonna try this <3
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