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Question about OpenGL, QML, and color representation


Tyronnosaurus
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Posted · Question about OpenGL, QML, and color representation

In the FEM plugin I'm developing, I've got a disparity between color tones in the OpenGL-rendered object and in the color chart:

fem.thumb.PNG.a1cb81783afe98ad73d5021175cecb52.PNG

 

For example, the max tension is represented as red (255, 0, 0, 1), both in rendering and inside QML. The 4 lower vertices of the cube have the max tension, so they should have the same red (but they're clearly pinkier).

 

I'm rendering with the simplest shader, default.shader, so there's no special color or lightning effects (diffusion, specularity...)  that I know of. I've just recently started learning about shaders.

 

If we look at similar things that Cura does, there doesn't seem to be a great disparity between colors in rendering and colors in QML legends:

577855157_linetype.thumb.PNG.27ce3947dd41ab71c542c971937b2bc5.PNGspeed.thumb.PNG.ac2a2f44b7d60c6c8aa2c46625147d21.PNG

 

Has the Cura team done something I'm missing?

 

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Posted · Question about OpenGL, QML, and color representation

Sometimes RenderDoc can be useful to debug rendering issues. https://renderdoc.org/

It could be that the model is rendered with the correct colors but something else is drawn over it.

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