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Re: Question about edges
March 22, 2013 04:48PM
Hi Tim,

Quote
Tim Gould
The one notable exception is if a part used a rotation on something really long to match with another detail. Which is unreliable design and best caught at the design/review stage.

That's the one thing that's strange. I get failures to lock-upon the 6x6 dishes if my TOL is < about 0.05. For example, 0.01 will lock up some but not all of the dishes.

And to make it worse, some pattern parts have markings intentionally authored with triangles < 0.05. (My guess is that these triangles were induced to remove T junctions.)

Quote

You could get rid of the problem by iterating until no matches are found. But that seems like overkill to me and is possibly more likely to result in false joins.

Right - I thought about that, but if the choice is between two somewhat arbitrary outputs for a wrong input, I might as well pick the one that requires less processing time. :-) I'm screening now to see which parts have 'close' outputs despite not having tiny input triangles. One technic part that failed this test had some authoring problems.

My hope was that, with no points closer than TOL after running, I could write the T-splitting with no concern for numeric precision (because TOL would be significantly bigger than the real floating point limits I would face).

But it may instead be the case that where the points are close together, the input was funky and the output can be funky too.

Cheers
Ben
SubjectAuthorViewsPosted
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Re: Question about edges Tim Gould310March 10, 2013 11:40PM
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Re: Question about edges Tim Gould251March 11, 2013 01:58PM
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Re: Question about edges Tim Gould280March 22, 2013 03:44PM
Re: Question about edges Ben Supnik287March 22, 2013 04:48PM
Re: Question about edges Philippe Hurbain339March 23, 2013 01:49AM
Re: Question about edges Travis Cobbs234March 11, 2013 11:20AM
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Re: Question about edges Roland Melkert223March 12, 2013 11:15AM
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Re: Question about edges Travis Cobbs222March 09, 2013 10:57PM



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