Hydra, custom shaders, and compute shader

Community Hydra
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1

Hey !
I’m tinkering with a small texture painting prototype with an hydra/storm viewport. C++/opengl/imgui
Right now I have, only a custom red renderbuffer that exists in the gl context of my app, that I can display somewhere in the interface.And I’d need to put that on an object as uv mapped. This would later be painted on for example.

And I’ve been wondering how would I inject this texture that only exists in memory to the object.
So far I came across shader injections through a plugin with a shaderdef and the glslfx that goes with it. But unsure if I can easily catch the texture with this.
Since my reference here is previewsurface and uvtexture that reads from an actual texture.
Or if I need to go through pure opengl code somewhere and bind that texture
Sorry for the lack of more technical jargon, that’s all I know so far on opengl and still lacking some more low level knowledge.

Thanks a lot !
Alex

2

Hi,

You can do this with a file format plugin. Make a plugin for a file extension like “.mytexture”. The plugin doesn’t need to actually read any file. It can just use the file name as a key to get the image data from your internal buffer and then return it as if it were being read from a file. We’ve been doing this successfully for some time to do the same thing.

Jerry

1 Like
3

Very interesting, I’ll take a look into it, thanks a lot for your input !