Design: Support navigation for transform operators #106008
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Reference: blender/blender#106008
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Motivation
This feature is intended as a complement to the
'Snap Base' editing feature(!104443).With this
'Snap Base' editing feature, consider a scenario where we need to move an object from the bottom of one object to the top of another. Without the ability to rotate the view, this task would be much more difficult and time-consuming. As you can see in the video below:If we have the ability to navigate during transformations, this task becomes much more efficient and accurate:
This feature provides another benefits as the ability to view the scene from different angles to ensure accuracy during transformations. Additionally, it allows for a more intuitive and user-friendly experience, especially when working with complex scenes and objects.
Obstacles
The biggest hurdle in this feature is the conflicts with the keys used for the current modal modifiers during transform (like the key
Scrollused to change the size of the area of influence of the proportional editing, among others).This is unfortunate, as these keys are already well integrated into the user's muscle memory.
Solution
To resolve this complication with conflicting keys, only 3 navigation operators will be supported (more may be added over time):
This feature must be optional and located in the keymaps options.
The shortcuts used to activate the transform modifiers will have to be modified as shown in the table attached.
Not sure if related but ... one idea we have for the future is to support multi-touch devices. Imagine someone using 2-fingers to rotate the scene, while using the pen to sculpt (or to transform).
I wonder if your proposal helps that in any way.
It would solve quite a few issues if navigation could be supported during modal operations. Operators like Circle Select are suffering from this.
The proposed changes to the keymaps seem good to me.
About multi-touch devices, I just couldn't test pens. But I don't think it will have any conflict.
I was able to test the multi-touch navigation gestures on the trackpad itself.
The solution (currently #105764) has already been thoroughly tested by users on https://blender.chat/ and https://devtalk.blender.org/.
I also made a new topic about it recently: https://devtalk.blender.org/t/snapping-precision-modeling-improvements/28435
The question that concern developers right now is, "What's the best approach?".
I proposed to create a navigation utility (
ED_view3d_navigation_do) that can be called by any operator. But other operators (like the Knife tool) use thePASS_THROUGHapproach.Still focusing on creating the utility, I proposed #106279, but for now it might be good to edit the #105764 PR to use the
PASS_THROUGHapproach. (A utility might be something for later)If this change is tested and confirmed by the users of that branch, I do hope devs consider integrating this change into the main branch. From an architect's point of view, this lack of basepoint snapping is the biggest drawback for me trying to recommend Blender to people working in interior design and architecture. Really, Blender has so much potential to be used in these fields.
Committed
33c13ae6e3Hi. It's a great feature, but where is the option to disable it please (for tutorial purposes)? Can't find it anywhere in the preferences. Also when searching the keymap using the search term 'proportional' the shortcuts to increase and decrease the falloff size aren't listed. Instead the only way to find the new shortcuts is to search the keybindings for 'alt mousewheel', which isn't very handy because people will only be searching if they don't know the shortcut.