Working through the spiral part of:

http://flycooler.com/download/Wood_SIGAsia2016.pdf

And struggling to understand

1) how the texture actually gets mapped/tiled onto the spiral

and

2) what points then, am I interpolating?

I'm guessing that either the 2D texture get mapped once onto each successive
turn of the spiral,
or it gets mapped linearly onto the nonlinear arc-length of the spiral arms, and
so there are then spaces between the x-dimension points?

Maybe someone could look at this and offer some ideas?
Even if you're just shooting in the dark, whatever you suggest might trigger an
idea for a solution.

Thanks!

- BW

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