A quite fast tri fill using stamping. If you want to visually see how it works check out my Geogebra applet here: https://www.geogebra.org/m/mc8ugzqx For instructions on how it works please see inside.
This triangle fill is about as about as fast as Log fathers one on resolution 1. The stamp tri fill has perfect non-rounded corners but there is no option to increase speed by decreasing accuracy. it fills the triangle with only 4 stamps. If we assume each stamp is 45% the speed of the pen. it's equivalent to drawing 9 lines. Since the best tri fills use about 15 lines this has the potential to be x1.5 as fast. Unfortunately there are also some nasty computations involved which slow it down.
