[vtk-developers] Multiple textures

[Patrick Bergeron]

Hi folks. I sent this a while back on vtk-users but got no response.



I am sending this to vtk-developers because if the features isn't implemented, I will implement it.


I am trying to pass multiple texture buffers to a fragment shader.


I saw I can do:


1) actor->SetTexture(vtkTexture*) takes only a single vtkTexture


2) actor->GetProperty()->SetTexture(int unit, vtkTexture*) takes a texture that I can associate to a texture unit, but those functions are deprecated.


In fact, I think that (2) doesn't even work anymore with the OpenGL2 backend, at least my shader code doesn't seem to be getting them, maybe I am doing something wrong. In any case, I get a vtk warning saying I should not do that.



Some folks have said I should combine multiple images into a single image before sending as a texture image. But I can't do this, because I need to send texture images as well as multiple data (non-image) buffers to the shader as well.


How can I attach multiple image buffers to the actor and/or ogl mapper?


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