Planar Rhino constraint but that works also if other snaps occurs?

Rhino
1

Hello,
I think I have a feature request \ complaint \ observation. I find myself not using the planar constraint very often because when drawing polylines at a quote that is different from the quote of the C plane, the planar constraint only preserves planarity if no snaps are engaged during the drawing process (except the first click of the polyline which sets the plane height). However,
I think this constraint would be much more useful if it preserved planarity strictly, even if other snaps at different heights are engaged.
I know I can simply move the Cplane, but it is a cumbersome process, it would be much faster if the planar constraint already had this feature embedded.

best Riccardo

2

If you have Planar active, after the first point is clicked, activate Project as well. All subsequent object snaps will be projected to the plane determined by the first point.

3

I see,

I thought I’ve tried all possible ways to activate this feature I just missed this one thing of activating projection after the first point is clicked, it’s cool that it can be done, thanks for the hint, and I see that this method might be more versatile than my previous proposal, but I must admit it’s a bit cumbersome and not really user friendly, maybe a more intuitive behavour could be that if projection and planar are active at the same time it would behave already as if the first point was clicked, in this way the user wouldn’t need to turn on and off project all the times when needing to chainin this behaviour over and over. This would be better in my opinion because when projection is active right now having planar turned on is useless.

4

Hi

I think this was flawed from day one and is cumbersome I complained about it during the first beta of Rhino.

The wording and discovery of what project does is confusing. If you don’t activate project than planar projects to the current cplane but if one activates project after planar is selected than it works like planar really should. If you activate only planar than it might and can snap to other objects that are not in plane, go figure.

This is the exact same problem as other snaps overriding ortho snaping. I don’t know who the programmer was who suggested this and coded rhino this way from day one but in my opinion it is flawed and does not follow what the commands suggest. Make planar planar and not allow the option to snap to other locations ie make it work like it should with project on and make ortho respect ortho like they are trying for V9 though I haven’t tried it I hear its flawed as well.

I came to rhino from point line 3d where planar meant planar and ortho meant ortho, but McNeel decided to program these tools with these weird caveats.

RM

5

I like how planar currently works. I always have planar on, and rarely use project.

6

I agree with your comment.

I often teach to youngers and people who never used any cad software and honestly all these tricky things that look minor at first are really a lot to remember for newcomers, so I defenitely agree that ortho should be strictly ortho and planar should be strictly planar.

Maybe for backwards compatibility there should be an option to chose one behaviour or another.

7

Yes I always have it on too.

But when wanting to do strictly planar curves like for extruding I sometimes forget to turn on project and find my curves have gone way off planar snapping to other points in space this is especially troublesome and requires one either to redo the entire curve/s or use project to cpIane after building the curves. I think the command should be reworked to be really planar i.e. include project on after first snap and add a setting to allow for the old behavior since many have become accustomed to the older flawed work flow with the caveats.

I think the problem is that planar can use 3 different drawing modes which are not transparent from the command name or user discovery.

  1. planar drawing on cplane if one doesn’t first snap to something.
  2. planar drawing on a plane determined after first snap location but allowing other non planar snap locations.
  3. planar that uses only planar with project on after first snap and lets on snap to other points but project to the first snap plane.

Frankly its a bit of a mess.

RM

8

Hi @riccardo.foschi2

I totally agree with you, see my post further up. When I asked about and complained about this in the beta before Rhinos first release I was met with disapproval just like when I said ortho should be really ortho.

RM