Is it possible that cplane is turned on after opening software or software starts always fron World->Top ? I have named cplane which is very close to original origin and I wonder if its possible that I had cplane turned on after opening software and I haven`t noticed that.
Custom CPlanes are document properties stored in the file/template - they are not global options. If your template or file had a non-standard CPlane active when you last saved/closed it, it will (in principle) open with it still active. On the other hand, if you have not messed with your default templates, and you open a new blank file based on one of those, the CPlanes will be standard.
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Thanks a lot. All clear now.
I would like to ask about some feature request to give user some indication that cplane is turned on on some viewport. If you will miss it then you will f.e. do a mirror with a small gap. I think vieports should have for example small 1px frame if cplane is turned on. What do you think about it? @Gijs @wim
@mdesign
the @ mcneel software mention is not related to us, fyi
There is always a CPlane active. I am assuming you mean a Cplane is active that is not one of the default World Cplanes, but just want to make sure.
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I model quite heavy models (car parts). I also have there also 3d scans in the background. The Center is an important thing to me (I do mirror in the end). One scan has a different centre than the other. I don’t want to move or change my scans during modeling work because it`s my policy that all is as I got it.
I set up a temporary centre for the front of the car and the rear of the car (for modeling purposes).
I opened some older files and I don’t remember if there is a Cplane turned on or not. It’s easy to miss that or forget that you are doing some operations over Cplane not over real 0,0,0 World Origin. Resetting 4views all the time even without reason, on blind only to be sure that Cplanes are turned off is also bad.
When I work in Modo and I have workplane turned on it’s easy to see that. Here I can`t say.
There is no such thing as a CPlane being “turned on”. Every viewport has a CPlane, when the viewport is active, the CPlane associated with it is active. You can modify the CPlanes in any viewport as you wish. To reset all CPlanes and views to “default” run the 4View command twice.
Ok so I would have indication that viewport has not default cplane to let user know that. For now I can’t see solution like that only hitting 4views on blind on any scene to be sure that I`m starting from default view.
If it is only your concern that you want to mirror over the world CPlanes then I think it is better to simply make some macros for that.
My Cplanes different 1degree and few milimeters from default you will never know if it is default or not.
What commands handle the Cplane center, axis? I think that not only mirror.
So do you think that letting know user that he does not default to centre and rotation on some viewports after the opening of some old scene is a bad idea?
I don’t think it is a bad idea.
Still making these transforms deliberately based on World CPlanes would be a good habit.
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Mirror doesn’t care about the CPlane origin (what you are calling centre) - it only cares about the active CPlane Z axis direction to create the mirror plane from a line (two points). That is the case for all the transformation commands that work based on the active CPlane - Rotate, Array, etc.
This reminds me of the physical workshop situation that has happened so many times - someone sets the table saw blade or disc sander at a 1° angle and then goes away and leaves it. Other people come and assume the angle is 90° and sand/saw all their pieces with that 1° angle. In this case certainly the person who forgot to set it back to 90° before leaving the machine is at fault - partially at least - but the general rule is to always check this stuff yourself before you start sanding/sawing… or modeling.
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Hehe. Please do not say that I should always hit 4views twice when I leave the software after 10 hrs of modeling at 1 am 
I only kindly ask to allow the user see if the Cplane is changed or not especially when the scene is opened. I model alone not in team but I don’t remember what I set a week ago because I do a lot of things. Going that path we could have no indication in software at all and do everything based on memory We don’t even need GUI cause we could code all things without GUI. I like your example but I still think that software should tell me if something is changed not as usual.
Look at old Modo. It’s easy to tell that I work with different Workplane but If someone would like to have a more hardcore solution it`s possible to delete that button and remember if it was active or not
Hi Marcin -
From the description in this thread, it sounds like you don’t have the grid turned on, or perhaps it’s very small relative to the size of the model?
The grid is always the visualization of the active CPlane. For something like a car, it would immediately be clear if that is set to the front or rear of the car.
-wim
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The difference between the default cplane and the changed one is very small: about 1 degree and 2mm but it’s crucial to fit the final parts to the car after production. How could I notice that on the viewport? Or maybe I am missing some indication there. If it’s bad then I will trim my bumper badly and have the wrong size of the final part. it’s stressful for me that I don’t know if it is turned on or not. I had no situation like this but I check this all the time like a crazy person and I feel that is additional stress which could be taken off with some indication. I do not post this for myself but for every beginner who will open the scene without knowing that cplane is turned on and have no idea why his model after the mirror is wrong. I`ve noticed that so I reported that.
Hi Marcin -
Perhaps you could use named views? Those save the active CPlane at the time of saving and you see from the viewport title which one is supposed to be “active”.
-wim
I use NamedCPlane command. Could you show me where is shown which is active?
you see from the viewport title which one is supposed to be “active”
Could you show me that viewport title?
@wim The viewport title shows the name of the view, not the name of the Cplane. If the Cplane is changed the name of the viewport does not change.
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