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c531cde1b7
- We no longer have to (slowly) check for valid elements every frame while dragging - Removed functions to deselect invalid mesh elements and to clear hover on invalid mesh elements - Cleaned up some use of 'const' in the mesh editor API #codereview richard.talbotwatkin #rb none [CL 3387062 by Mike Fricker in Dev-Geometry branch]
96 lines
3.2 KiB
C++
96 lines
3.2 KiB
C++
// Copyright 1998-2016 Epic Games, Inc. All Rights Reserved.
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#include "TessellatePolygon.h"
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#include "IMeshEditorModeEditingContract.h"
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#include "UICommandInfo.h"
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#include "EditableMesh.h"
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#include "MeshElement.h"
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#define LOCTEXT_NAMESPACE "MeshEditorMode"
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void UTessellatePolygonCommand::RegisterUICommand( FBindingContext* BindingContext )
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{
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UI_COMMAND_EXT( BindingContext, /* Out */ UICommandInfo, "TessellatePolygon", "Tessellate Polygon", "Tessellate selected polygons into smaller polygons.", EUserInterfaceActionType::Button, FInputChord() );
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}
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void UTessellatePolygonCommand::Execute( IMeshEditorModeEditingContract& MeshEditorMode )
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{
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if( MeshEditorMode.GetActiveAction() != NAME_None )
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{
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return;
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}
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static TMap<UEditableMesh*, TArray<FMeshElement>> SelectedMeshesAndPolygons;
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MeshEditorMode.GetSelectedMeshesAndPolygons( SelectedMeshesAndPolygons );
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if( SelectedMeshesAndPolygons.Num() == 0 )
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{
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return;
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}
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FScopedTransaction Transaction( LOCTEXT( "UndoTessellatePolygon", "Tessellate Polygon" ) );
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MeshEditorMode.CommitSelectedMeshes();
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// Refresh selection (committing may have created a new mesh instance)
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MeshEditorMode.GetSelectedMeshesAndPolygons( SelectedMeshesAndPolygons );
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// Deselect the mesh elements before we delete them. This will make sure they become selected again after undo.
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MeshEditorMode.DeselectMeshElements( SelectedMeshesAndPolygons );
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static TArray<FMeshElement> MeshElementsToSelect;
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MeshElementsToSelect.Reset();
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for( const auto& SelectedMeshAndPolygons : SelectedMeshesAndPolygons )
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{
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UEditableMesh* EditableMesh = SelectedMeshAndPolygons.Key;
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const TArray<FMeshElement>& PolygonElements = SelectedMeshAndPolygons.Value;
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static TArray<FPolygonRef> PolygonsToTessellate;
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PolygonsToTessellate.Reset( PolygonElements.Num() );
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for( const auto& PolygonElement : PolygonElements )
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{
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const FPolygonRef PolygonRef( PolygonElement.ElementAddress.SectionID, FPolygonID( PolygonElement.ElementAddress.ElementID ) );
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PolygonsToTessellate.Add( PolygonRef );
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}
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EditableMesh->StartModification( EMeshModificationType::Final, EMeshTopologyChange::TopologyChange );
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// @todo mesheditor: Expose as configurable parameter
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const ETriangleTessellationMode TriangleTessellationMode = ETriangleTessellationMode::FourTriangles;
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static TArray<FPolygonRef> NewPolygonRefs;
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EditableMesh->TessellatePolygons( PolygonsToTessellate, TriangleTessellationMode, /* Out */ NewPolygonRefs );
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// Select the new polygons
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for( const FPolygonRef NewPolygonRef : NewPolygonRefs )
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{
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FMeshElement NewPolygonMeshElement;
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{
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NewPolygonMeshElement.Component = PolygonElements[0].Component;
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NewPolygonMeshElement.ElementAddress = PolygonElements[0].ElementAddress;
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NewPolygonMeshElement.ElementAddress.ElementType = EEditableMeshElementType::Polygon;
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NewPolygonMeshElement.ElementAddress.SectionID = NewPolygonRef.SectionID;
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NewPolygonMeshElement.ElementAddress.ElementID = NewPolygonRef.PolygonID;
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}
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MeshElementsToSelect.Add( NewPolygonMeshElement );
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}
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EditableMesh->EndModification();
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MeshEditorMode.TrackUndo( EditableMesh, EditableMesh->MakeUndo() );
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}
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// Select the new smaller polygons
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MeshEditorMode.SelectMeshElements( MeshElementsToSelect );
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}
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#undef LOCTEXT_NAMESPACE
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