help with sketcher: How to constrain a line segment to the x axis

carlopav · Post by **carlopav** » Sat Nov 30, 2019 1:00 pm

Hello, this is an help request to use PointOnObject to fix a line segment to the x axis. I tried with:

Sketch.addConstraint(Sketcher.Constraint('PointOnObject',0,0,LineFixed))

Assuming that i'm constraining object 0 (the line segment), its point 0 (start point), but I can't understand what to put on LineFixed.
many thanks

Post by **openBrain** » Sat Nov 30, 2019 1:13 pm

Hi,

First, endpoints are identified with 1 & 2, not with 0 & 1.

Then Xaxis is identified with -1 and Yaxis with -2. So :

Sketch.addConstraint(Sketcher.Constraint('PointOnObject',0,1,-1))

carlopav · Post by **carlopav** » Sat Nov 30, 2019 2:32 pm

Thanks so much!

Post by **openBrain** » Sat Nov 30, 2019 3:56 pm

carlopav wrote: ↑Sat Nov 30, 2019 2:32 pm Thanks so much!

Welcome. You know, for such things, you can do it in the GUI and observe the line appearing in the Python console to get clues about usage.

carlopav · Post by **carlopav** » Sat Nov 30, 2019 6:22 pm

Yup that's how I usually do it, but I didn't find the information about -1 for X axis... Should we add the example to the wiki?

Post by **chrisb** » Sat Nov 30, 2019 7:09 pm

Extending the wiki is always a good idea.