This CL was reviewed here: https://p4-swarm.epicgames.net/reviews/26051575 but needs to be merged into //Fortnite/Release-26.00, not //Fortnite/Main
#jira UE-183457
#rb ryan.schmidt, nathan.mitchell
[CL 26180612 by matija kecman in 5.3 branch]
Add support for Tools to provide an "output" selection. Add UGeometrySelectionManager::SetSelectionForComponent() which can set an explicit externally-provided selection. FBaseDynamicMeshSelector::UpdateSelectionFromSelection() now supports selection conversion when available and requested (is used to implement SetSelectionForComponent). New GeometrySelectionUtil functions InitializeSelectionFromTriangles() and ConvertSelection() are used to implement this (note: only Triangles->other conversion is currently supported). Add HaveAvailableGeometrySelection() and SetToolOutputGeometrySelectionForTarget() in StoredMeshSelectionUtil.h, this is the top-level function that Tools can use to set an Output selection.
ExtrudeMeshSelectionTool now emits output selection.
Update EditMeshPolygonsTool to use new Selection system and allow individual operations to be utilized as standalone Tools. Convert EditMeshPolygonsTool to be a USingleTargetWithSelectionTool, use FGeometrySelection to initialize selection. Add bTerminateOnPendingActionComplete flag, which is set when Tool is directly initialized to a specific operation, and forces tool to shut down when operation completes. This allows it to be used to more cleanly implement multiple action buttons in Modeling UI. When in this mode, selection panels are not shown. On Shutdown, now emits an "output" selection which GeometrySelectionManager can use to provide new selection to user. Update UPolygonSelectionMechanic Set/Get selection APIs to use FGeometrySelection instead of UPersistentMeshSelection.
port UVProjectionTool to derive from USingleTargetWithSelectionTool, use FGeometrySelection to initialize target ROI
deprecate UPersistentMeshSelection and related functions in StoredMeshSelectionUtil.h. Deprecate Tool Input Selection APIs in USingleSelectionMeshEditingTool and Builder.
Repurpose old ModelingMode-level PolyModel tab operations for new Selection Tools UI, now support Inset, Outset, Cut Faces, Insert Edge Loop, PushPull, and Bevel.
#rb none
#preflight 63c84fa2b065224750b9831f
[CL 23766643 by ryan schmidt in ue5-main branch]
Add UE::ToolTarget::SupportsIncrementalMeshChanges() and ::ApplyIncrementalMeshEditChange(), these allow a Tool to directly edit a DynamicMeshComponent in the level (and emit corresponding MeshChange) so that a Tool can emit multiple undoable edits on a DynamicMesh
Add new USingleTargetWithSelectionTool base tool class, this is a USingleSelectionTool that can receive a FGeometrySelection. USingleTargetWithSelectionToolBuilder configures this type of Tool as necessary.
Add new LinearExtrusionOp dynamic mesh operator, provides linear-extrusion API to FOffsetMeshRegion using new Operator design (mesh shared via FSharedConstDynamicMesh3, CalculateResultInPlace() function to simplify direct usage in geometry script/etc)
Add new ExtrudeMeshSelectionTool, subclass of USingleTargetWithSelectionTool, exposes new LinearExtrusionOp, uses above ToolTarget functions to directly edit DynamicMeshComponent where possible
Enable new Tool in Modeling Mode
Add a few new functions to UMeshOpPreviewWithBackgroundCompute to simplify configuring InProgress and Secondary materials
Small additions to USingleSelectionTool
#preflight 639a3e250a671525500d8a7e
#rb none
[CL 23520421 by ryan schmidt in ue5-main branch]
