File extensions for external shaders

[lexaknyazev]

While it's not required to use any specific filename extension for shader files, could we recommend usage of .frag/.vert instead of .glsl?

This could simplify pipeline integration with glslang.

[javagl]

I wasn't aware that a reasonable convention existed here - I've seen glsl, frag/vert, fs/vs, glslv/glslf and others. (And I fell guilty of using glsl as well).

The recommendation to use vert/frag could certainly be mentioned somewhere.

Related: http://stackoverflow.com/q/6432838

[pjcozzi]

Is this really worth the change? Should glslang integration really drive us to change this when after dozens of implementations, this has not been a concern?

We are making fixes for 1.0.1, but we have to be careful that we just don't put every arbitrary change on the table.

[lexaknyazev]

.glsl file extension prevents tools from knowing shader language grammar until glTF is loaded. Anyway, this could be done later within each API extension (#733).

[pjcozzi]

Is it worth discussing this as part of KHR_technique_webgl?

[lexaknyazev]

Yeah, we should also ensure that shader sources could be loaded from bufferViews.

[lexaknyazev]

It's been decided that shader files can have any extension.