Completed
Color controls are great for styling the interior of polygons but we can take them up to the next level by including a tool for filling closed polygons with hatchlines like those used to show cross-sections of parts in engineering drawings. This would facilitate using Geogebra to create all kinds of apps teaching engineering concepts or creating engineering calculators. For example teaching geometric dimensioning and tolerancing relies heavily on showing the cross sections of parts.
I like this idea 
what hatchline you want?
https://help.geogebra.org/t...
GeoGebra can already do that:Polygon -> Properties -> Style -> Filling
Enough options? :)
https://www.geogebra.org/m/FGwhJFS7
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