[Oberon] FPGA - Display3.Mod - porting

Andreas Pirklbauer andreas_pirklbauer at yahoo.com
Wed Nov 7 20:09:26 CET 2018

I recommend that you read Wirth's October 1989 ETH technical report No. 117  titled “Drawing Lines, Circles and Ellipses in a Raster”. In a tutorial style, Bresenham’s algorithms for drawing straight lines and circles are developed using Dijkstra’s notation and discipline.

    > Tomas Kral thomas.kral at email.cz  Wed Nov 7 12:51:46 CET 2018
    > Circle does not use SIN(x) or COS(y) at all, how is that possible? I
    > have always thought we need some trigonometry to draw a circle.

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