selfImDrawList handle on which this method operates.
centerShape center in absolute screen coordinates.
radiusCircle or arc radius in screen pixels.
a_min_sampleStart/end sample index in the internal fast-arc lookup table, not radians.
a_max_sampleStart/end sample index in the internal fast-arc lookup table, not radians.
a_stepLookup-table sample step; 0 selects the step automatically from the radius.
Append a circular arc using precomputed samples and a sampling step.