converting geekest snoise functions to classic mode

[tkzic]

I am trying to convert a geekest mode shader to classic mode - and having trouble with the snoise calls.

Including these snippets in classic mode gives a compile error.

float f = snoise2D(v.xy);
float g = snoise3D(v.xyz);
float h = snoise4D(v.xyzw);

Is there something else that needs to be included to make this work?

Thanks,
Tom

[doxas]

@tkzic

Hi!

Utility functions like snoise2D are only available in specific modes of twigl. The Classic Mode is designed to be fully compliant with the original GLSL specification, so these utility functions are not available in that mode.

If you'd like to implement these utility functions yourself, you can find the details in the file located at https://github.com/doxas/twigl/blob/master/src/shader_snippet/noise.glsl