LWJGL - Fade Textures into eachother

[Ikaron]

Hello there, I'm new to this forum (But not too much to LWJGL ) and I was looking for a way to fade 2 textures into eachother. But no time based fade, more like a Quad, that has the one texture on the one side, and the other texture on the other side, and fades between those two. I tried using 2 quads that faded into nothing, but that made the other one that faded the other texture in the other direction disappear. I haven't found any other way, and don't find anything on the webs. Any ideas?
Thanks for your time.

[Sickan]

I would be very interested in something like this, too!

Cheers

[Ikaron]

Well, I found a way by displacing the second quad just a tiny bit, that of course is a really dirty method, but seems to be the only way.

Games published by our own members! Check 'em out!

[Danny02]

without shaders:
render a quad two times. The first one should be rendered just as always. but the second one is a bit more tricky, the quad needs vertex color attributes, where on one side it has an alpha of 1 and on the other 0. then you have to render the second quad with depth-testing to equal and alpha-blending enabled.

with shaders:
everything is easier^^. just create a shader who reads 2 textures and blend them together depending on a vertex attribute.

some simple blending I did some time ago, based on the idea found in this blog post http://www.m4x0r.com/blog/2010/05/blending-terrain-textures/

[Ikaron]

Thanks! I was missing the glDepthFunc(GL_EQUAL) call! Thank you really much

[davedes]

Using shaders is very simple and much more flexible. Full code here.

Textures:



Mask: (alpha)


Result: