[Oberon] Oberon-7 - Circle Segments

Jörg joerg.straube at iaeth.ch
Wed Feb 20 13:37:01 CET 2019



Just for completeness: ☺

The formula c := (r * 181 + 104) DIV 209; [now with correct rounding] calculates the HourTicks absolutely correctly for all circles with radius “r” up to 780 pixels.

The formula c := (r * 71 + 41) DIV 82; is correct for circles with radius “r” up to 140 pixels. For larger circles it’s good as well, but sometimes off by one pixel.





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