Hello,
Welcome to the Processing forum.
There is a rotateZ() bug in versions 3.5.*
It is fixed in the 4.0 alpha 1 Pre-Release.
Workaround:
// ******** BUG ?? ********
//s.rotateZ(rot); // Bug
s.rotate(rot, 0, 0, 1); // Rotates about z-axis
translate(location.x,location.y,location.z);
shape(s);
References:
Cannot run rotateZ() within the PShape class #5770
https://discourse.processing.org/t/rotate-function-with-4-arguments/5652
http://processing.github.io/processing-javadocs/core/ has some references:
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