autoshader:undefined variable "tot_diffuse" (w/ light ramps)

[Technologicat]

Talking to myself to keep related things linked…

The development ideas have been tested, and there is a new thread about them at:

Cartoon shader improvements

Recently, I had some ideas for improving the cartoon shader, as mentioned here: https://discourse.panda3d.org/t/autoshader-undefined-variable-tot-diffuse-w-light-ramps/13781/5 I now have a working prototype. What I’ve added is: Smoothed light/dark boundaries in light ramping. In addition to sharp thresholding as previously, a linearly interpolated transition is now supported in both single and double threshold modes. The length of the interpolation range can be adjusted (separately for both…