Added transform control and select entities GUI plugins

[ahcorde]

Signed-off-by: ahcorde ahcorde@gmail.com

🎉 New feature

Summary

This PR is part of the consolidation between Scene 3D in ign-gazebo and ign-gui. This PR adds two independent plugin to select entities and transform control.

It builds on top of #813

Test it

ign gazebo --gui-config src/ign-gazebo/src/gui/gui.config rolling_shapes.sdf -v 4

Checklist

• Signed all commits for DCO
• Added tests
• Added example and/or tutorial
• Updated documentation (as needed)
• Updated migration guide (as needed)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

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[chapulina]

I wasn't able to compile this branch because I think I have the wrong combination of ign-gui branches.

The main high-level comment I have is whether it would be better to combine these 2 with the existing TransformControl plugin. I think all this logic should originally have been contained in that plugin, but we didn't have a mechanism for manipulating the 3D scene, so part of it ended up in Scene3D.

[chapulina]

@ahcorde . I started reviewing this and making some changes in ahcorde/plugin/selectEntities_transformControl...chapulina/select_transform. I thought they would be mainly trivial changes, updating style, namespaces and whatnot, as well as combining TransformControl with TransformControlLogic. But then I realized that some features are not working yet on for transform controls:

• Snapping (the keyEvent never has modifiers like Control, so it's not possible to snap while dragging)
• In select mode, select an entity, then change to translate mode. The transform controls should attach to the last selected entity, but it doesn't attach to anything.

[ahcorde]

Requires gazebosim/gz-gui#268

[chapulina]

I pushed some documentation and style updates in caf08a9.

I noticed a change in behaviour. Pressing Shift is toggling between world and local frames, but the correct behaviour is to use the world frame while the Shift key is being held, and going back to local when the key is released, as explained in the tutorial:

https://ignitionrobotics.org/docs/edifice/manipulating_models#align-to-world-frame

[ahcorde]

I noticed a change in behaviour. Pressing Shift is toggling between world and local frames, but the correct behaviour is to use the world frame while the Shift key is being held, and going back to local when the key is released, as explained in the tutorial:

I was using the old KeyEvent. Solved e6e3e16

[chapulina]

Everything seems to be working well for me now, thanks! I just have this final question: e6e3e16#commitcomment-54864874

[chapulina]

Works for me! We just need some fresh ign-gui nightlies to go with this. I'm on it.

Triggered: https://build.osrfoundation.org/job/ign-gui6-debbuilder/

[codecov]

Codecov Report

Merging #854 (943679d) into main (eaf7aab) will decrease coverage by 0.90%.
The diff coverage is 4.40%.

@@            Coverage Diff             @@
##             main     #854      +/-   ##
==========================================
- Coverage   65.43%   64.53%   -0.91%     
==========================================
  Files         246      246              
  Lines       19433    19729     +296     
==========================================
+ Hits        12716    12732      +16     
- Misses       6717     6997     +280     

Impacted Files	Coverage Δ
include/ignition/gazebo/gui/GuiEvents.hh	0.00% <0.00%> (ø)
src/gui/plugins/scene3d/Scene3D.cc	10.79% <0.00%> (-0.01%)	⬇️
src/rendering/SceneManager.cc	35.13% <ø> (-0.07%)	⬇️
.../gui/plugins/transform_control/TransformControl.cc	7.23% <4.45%> (-11.92%)	⬇️
src/gui/plugins/plot_3d/Plot3D.cc	47.82% <0.00%> (+4.34%)	⬆️

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