Curve CP_is this a bug?

Well It's really simple.There are two lines and the intersection which isn't on them.I use Curve CP to find the closest point on each line from that intersection.Logically it should be start or end of the line means that the "t" output of CCP must be 0 or equal to line length but it's not.

So what happens here?is this a bug?If not what's that number "t" shows?

Image file attached.

Attachments:

Curve CP Weired.jpg, 479 KB

Replies to This Discussion

Permalink Reply by Joseph Oster on October 21, 2015 at 12:10pm

Non-parallel line curves intersect even when they don't touch each other - it's weird but true.

And if you expect 't' between 0 and 1, you might need to reparameterize the lines.

Permalink Reply by Morteza Motahari on October 21, 2015 at 12:15pm

Thanks Joseph for quick reply.But how do you reparameterize the lines?

Permalink Reply by Joseph Oster on October 21, 2015 at 12:23pm

Well, actually, 'Reparameterize' is not available for lines, only curves!

You right-click on the geometry param or the curve 'C' input on 'Crv CP' or 'CCX' - it's not an option on 'LLX'.

But I just tried to replicate your results and it works fine for me - 't' = 1.

(and 'CCX' doesn't intersect lines that don't cross the way 'LLX' does - so I'm no help at all, sorry!)

Permalink Reply by Morteza Motahari on October 21, 2015 at 12:30pm

Actually it worked for me at first too.Then as i tried to edit the source lines in rhino this thing happened.But good news is reparameterized idea worked for me.

thanks alot.

Permalink Reply by Joseph Oster on October 21, 2015 at 12:33pm

Ah, the Rhino edit(?) of the source lines explains it then. Cheers

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