Intersection not visible


(Emmanuelle Vanhaesendonck) #1

Hi,
I made 2 curves, and the way I build them, a pull of 2 lines - intersecting in the end - on a surface, they should be intersecting on the end. But when I zoom at those pulled lines, they are not intersecting, but when I do the intersect command I get this point on the blue line (which was supposed to be the connection point) I don’t know why I don’t see them intersecting each other and there is an intersection point…


Someone who had the same problem, or knows why? I am working on Rhino 5 on Mac. Thanks!


(Pascal Golay) #2

Hello - if you are zoomed in enough, and I mean a lot, it may be that the curve drawing will be misleading. The real test is to check the endpoints of the curves, if they are meant to be coincident, using ‘What’

-Pascal


(Emmanuelle Vanhaesendonck) #3

Hi, the end of both curves have the same number. Can I be sure with 0,001 decimals that it is the same? (I am doing quiet a precise drawing to analyze methods of lengths in my drawing, that’s why i am asking)
@pascal I am zoomed in a lot like you said.


(Pascal Golay) #4

Hello - you can try the
testNumberFormat command to get more precision in What. You’ll need to type the entire command to run it, as it is a test command. I am not, off hand, 100% certain that it is in Rhino for Mac but I expect it is.

-Pascal


(Emmanuelle Vanhaesendonck) #5

@pascal I tried it and when I put a number in the command, it’s says unknown, but clearly works. The lines have not exactly the same endpoint by 9 decimals after ‘,’. Does it mean the intersection point is not right then?


(Pascal Golay) #6

No, it does not. It, like many operations in Rhino is subject to a tolerance.

-Pascal


(Emmanuelle Vanhaesendonck) #7

ok, thanks for the explanation :slight_smile: