__ian__

OpenGL geometry shaders + interpolation qualifiers

Discussion created by __ian__ on Oct 29, 2017
Latest reply on Aug 8, 2018 by xhuang

Reading the spec it says

Output variables can be defined with interpolation qualifiers. The Fragment Shader equivalent interface variables should define the same variables with the same qualifiers.

https://www.khronos.org/opengl/wiki/Geometry_Shader#Outputs

 

On my ATI card it just seems to ignore the interpolation qualifier completely and the output is broken -> https://i.imgur.com/P8TwxFC.jpg Should look like -> https://i.imgur.com/ld9w7RD.jpg There's no warnings or compile errors, it just ignores noperspective and does 1/z interpolation as normal.

This is my shader input/outputs -> https://i.imgur.com/WXqIoYD.png

 

I am trying to do custom attribute interpolation.

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