RhinoCommon Python Bounding Box Issue

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Permalink Reply by Arend on May 8, 2014 at 8:26am

1. Create a bounding box with the transform/plane of the orientation you want.

2. Use the min/max points from that bounding box

3. Create a new box new box (plane, interval(min.x, max.x), interval(min.y,max.y), interval(min.z, max.z))

Permalink Reply by Ryan Gathmann on May 8, 2014 at 8:30am

ANSWER:

Since a bounding box isnt actually a box but really just a volume of enclosed space, if we try to transform the bounding box it really just move the box then recalculates to bounding box. The better solution is to get the corner points of the bounding box and then transform the points themselves. You can see the working code below:

def GetBoundingBox(geometry, plane=None):
if plane is not None:
bbox = geometry.GetBoundingBox(plane)
else:
bbox = geometry.GetBoundingBox(True)
corners = list(bbox.GetCorners())
if plane is not None:
world = Rhino.Geometry.Plane.WorldXY
plane_to_world = Rhino.Geometry.Transform.ChangeBasis(plane, world)
for pt in corners:
pt.Transform(plane_to_world)
return corners