Frank ff56cf0ee9 Pinwheel speed optimizations ...

* use "float" math only - sinf(), cosf(), roundf()
* use fewer "rays" for medium-sized matrix (<=32 pixels wide/high)
* ray drawing optimized to use fixed point

up to 80% faster on esp32 and esp32-S3; -S2/-C3 should also see benefits, as these do not have floating point support in hardware.

2024-02-25 18:00:19 +01:00

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