benoit gadreau 7c004866a5 New TRS Gizmo updates ...

- arcball rotation: the rotation is computed using a spherical+hyperbolic projection (see code for more explanation)
    - indirect manipulation via MMB: hit parts are stored per mode then are used to drive the proper drag function
    - defered drag function: in order to avoid notifications storm, the drag functions can be applied on tick instead using a pending function
    - a single default TRS gizmo is now created when needed (instead of creating several thru selection changed or when the gizmo manager was ticking) and its visibility is set based on rules

TODO
    - UEditorInteractiveGizmoManager is now closer to UInteractiveGizmoManager so I don't think we need ActiveEditorGizmos, CachedGizmoMap, etc. that are not used anymore. This should be cleaned in another CL
    - UEditorTransformGizmo::OnGizmoTransformBegin should set the current axis (needed for some modes, including IKRig) but this is disabled for now has there are some side effects with dragging (this will be treated in another CL)


#jira UE-152973
#jira UE-161236
#rb brooke.hubert zach.rammell

[CL 27751789 by benoit gadreau in ue5-main branch]

2023-09-11 09:54:48 -04:00

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