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The attached part displays some odd behavior (see the embedded VBA macro T2). The size of the part and the flat pattern extents (40mm x 558.8mm) are reported correctly in Inventor's internal flat pattern properties, but the rangebox information for both the folded and flat model is wildly innacurate for the X value. This seems directly related to the spline based edge on the part.
What spline data is causing the disparity? I know that the rangebox object is only guaranteed to contain the body, but with such a large error it makes the use of the rangebox for any body based on spline geometry pretty much useless.
How is Inventor calculating extents internally? Is it a ray based approach, or a study of edge data? From a programming perspective, how can we get a result that will always return a reasonably accurate description of the size of the part?
Neil
Solved! Go to Solution.