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Expand convex hull by horizontal expansion

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The getSetting call doesn't seem to work at the moment, but the rest of the routine works if I replace the getSetting call with an actual value.

Contributes to issue CURA-2407.
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Ghostkeeper 2016-09-27 17:09:19 +02:00
parent dc80d50eb5
commit 6affb80189
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1 changed files with 10 additions and 3 deletions
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13
cura/ConvexHullDecorator.py
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@ -199,9 +199,16 @@ class ConvexHullDecorator(SceneNodeDecorator):
# First, calculate the normal convex hull around the points
convex_hull = hull.getConvexHull()
# Then, do a Minkowski hull with a simple 1x1 quad to outset and round the normal convex hull.
# This is done because of rounding errors.
rounded_hull = convex_hull.getMinkowskiHull(Polygon(numpy.array([[-0.5, -0.5], [-0.5, 0.5], [0.5, 0.5], [0.5, -0.5]], numpy.float32)))
#Then, offset the convex hull with the horizontal expansion value, since that is always added to the mesh.
#Use a minimum of 0.5mm to outset and round the normal convex hull if there is no horizontal expansion, because of edge cases.
horizontal_expansion = max(0.5, self._getSettingProperty("xy_offset", "value"))
expansion_polygon = Polygon(numpy.array([
[-horizontal_expansion, -horizontal_expansion],
[-horizontal_expansion, horizontal_expansion],
[horizontal_expansion, horizontal_expansion],
[horizontal_expansion, -horizontal_expansion]
], numpy.float32))
rounded_hull = convex_hull.getMinkowskiHull(expansion_polygon)
# Store the result in the cache
self._2d_convex_hull_mesh = mesh