Why ?
Problems overwriting construction lines
Forum rules
and Helpful information
and Helpful information
IMPORTANT: Please click here and read this first, before asking for help
Also, be nice to others! Read the FreeCAD code of conduct!
Also, be nice to others! Read the FreeCAD code of conduct!
- Shalmeneser
- Veteran
- Posts: 9475
- Joined: Wed Dec 23, 2020 12:04 am
- Location: Fr
Re: Problems overwriting construction lines
You were the one who brought up master sketch in this thread. I think it is preferred to bring in the master sketch as a copy rather than an "external". I avoid "external" like the plague. Probably OK for a sketch, but often leads to TNP if used with a solid.
Your choice.
Gene
- Shalmeneser
- Veteran
- Posts: 9475
- Joined: Wed Dec 23, 2020 12:04 am
- Location: Fr
Re: Problems overwriting construction lines
Sketcher_CarbonCopy and Sketcher_External have problems and nothing is perfect.
- If you suppress the link, the link is suppressed and changes will not follow.
- If you keep link, suppressing it in the original sketch kill it in the copy.
- It's not written in the new sketch that you are 'copying' from other sketch. 'External' is explicit.
- In 'copy', you need sometimes to keep a lot of material from original sketch, obscuring your purpose.
- If you modify a lot your first sketch, 'copy' will not follow.
'External' will break but if you use the minimal set of 'externals', modification could be possible.
* Ok upon sketch : okI avoid "external" like the plague. Probably OK for a sketch, but often leads to TNP if used with a solid.
* Not upon solid : ok
The solid has more chance to change than sketches.
Thank you for sharing this idea. Allways good dialog.I think it is preferred to bring in the master sketch as a copy rather than an "external".
I need to think more about it.
Re: Problems overwriting construction lines
Yes, I noted that as a feature.Shalmeneser wrote: ↑Wed Oct 20, 2021 5:07 pm [*] If you suppress the link, the link is suppressed and changes will not follow.
Gene
Re: Problems overwriting construction lines
CarbonCopy remains stable as long as the dimensional constraints remain. With the current technique, the constraints can even survive deleting a geometric element to which they are attached. But if you e.g. replace a dimension with an equality constraints, the CarbonCopy in general goes havoc.
External geometry doesn't care about constraints, but if you remove a geometric element or rearrange the sketch too heavily, the external references go havoc.
External geometry doesn't care about constraints, but if you remove a geometric element or rearrange the sketch too heavily, the external references go havoc.
A Sketcher Lecture with in-depth information is available in English, auf Deutsch, en français, en español.