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52ab1f5537
- Refactor recompute-UVs-for-groups/islands out of ParameterizeMeshOp/Tool into RecomputeUVsOp/Tool. RecomputeUVsTool supports selection of active PolygroupLayer when applicable. Add support for auto-repacking. - Clean up ParameterizeMeshOp/Tool, remove functionality related to recomputation that was moved to Recompute tool, add separate property sets for UVAtlas and XAtlas - Add FDynamicMeshUVEditor::QuickPack() function to compute UV layout - Add support for Polygroup Layer selection in SetCollisionGeometryTool, if only one source object is in use #rb none #rnx #jira none #preflight 60ced4b0be81e800012cc135 [CL 16724375 by Ryan Schmidt in ue5-main branch]
116 lines
3.6 KiB
C++
116 lines
3.6 KiB
C++
// Copyright Epic Games, Inc. All Rights Reserved.
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#pragma once
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#include "MathUtil.h"
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#include "DynamicMesh/DynamicMesh3.h"
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#include "DynamicMesh/DynamicMeshAttributeSet.h"
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namespace UE
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{
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namespace Geometry
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{
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/**
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* Polygroup sets can be stored in multiple places. The default location is in the per-triangle group integer stored
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* directly on a FDynamicMesh3. Additional layers may be stored in the FDynamicMeshAttributeSet. Future iterations
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* could store packed polygroups in other places, store them in separate arrays, and so on.
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* FPolygroupSet can be used to abstract these different cases, by providing a standard Polygroup Get/Set API.
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*
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* To support unique Polygroup ID allocation, FPolygroupSet calculates the maximum GroupID on creation, and
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* updates this maximum across SetGroup() calls. AllocateNewGroupID() can be used to provide new unused GroupIDs.
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* For consistency with FDynamicMesh3, MaxGroupID is set such that all GroupIDs are less than MaxGroupID
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*
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*/
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struct DYNAMICMESH_API FPolygroupSet
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{
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FDynamicMesh3* Mesh = nullptr;
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FDynamicMeshPolygroupAttribute* PolygroupAttrib = nullptr;
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int32 GroupLayerIndex = -1;
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int32 MaxGroupID = 0; // Note: all group IDs are less than MaxGroupID
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/** Initialize a PolygroupSet for the given Mesh, and standard triangle group layer */
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explicit FPolygroupSet(FDynamicMesh3* MeshIn);
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/** Initialize a PolygroupSet for given Mesh and specific Polygroup attribute layer */
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explicit FPolygroupSet(FDynamicMesh3* MeshIn, FDynamicMeshPolygroupAttribute* PolygroupAttribIn);
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/** Initialize a PolygroupSet for given Mesh and specific Polygroup attribute layer, found by index. If not valid, fall back to standard triangle group layer. */
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explicit FPolygroupSet(FDynamicMesh3* MeshIn, int32 PolygroupLayerIndex);
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/** Initialize a PolygroupSet for given Mesh and specific Polygroup attribute layer, found by name. If not valid, fall back to standard triangle group layer. */
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explicit FPolygroupSet(FDynamicMesh3* MeshIn, FName AttribName);
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/** Initialize a PolygroupSet by copying an existing PolygroupSet */
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explicit FPolygroupSet(const FPolygroupSet* CopyIn);
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/** @return Mesh this PolygroupSet references */
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FDynamicMesh3* GetMesh() { return Mesh; }
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/** @return PolygroupAttribute this PolygroupSet references, or null if no PolygroupAttribute is in use */
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FDynamicMeshPolygroupAttribute* GetPolygroup() { return PolygroupAttrib; }
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/** @return index of current PolygroupAttribute into Mesh AttributeSet, or -1 if this information does not exist */
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int32 GetPolygroupIndex() const { return GroupLayerIndex; }
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/**
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* @return PolygroupID for a TriangleID
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*/
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int32 GetGroup(int32 TriangleID)
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{
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return (PolygroupAttrib) ? PolygroupAttrib->GetValue(TriangleID) : Mesh->GetTriangleGroup(TriangleID);
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}
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/**
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* @return PolygroupID for a TriangleID
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*/
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int32 GetTriangleGroup(int32 TriangleID)
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{
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return (PolygroupAttrib) ? PolygroupAttrib->GetValue(TriangleID) : Mesh->GetTriangleGroup(TriangleID);
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}
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/**
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* Set the PolygroupID for a TriangleID
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*/
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void SetGroup(int32 TriangleID, int32 NewGroupID)
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{
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if (Mesh->IsTriangle(TriangleID))
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{
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if (PolygroupAttrib)
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{
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PolygroupAttrib->SetValue(TriangleID, NewGroupID);
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}
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else
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{
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Mesh->SetTriangleGroup(TriangleID, NewGroupID);
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}
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}
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MaxGroupID = FMath::Max(MaxGroupID, NewGroupID + 1);
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}
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/**
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* Calculate the current maximum PolygroupID used in the active set and store in MaxGroupID member
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*/
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void RecalculateMaxGroupID();
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/**
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* Allocate a new unused PolygroupID by incrementing the MaxGroupID member
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*/
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int32 AllocateNewGroupID()
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{
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return MaxGroupID++;
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}
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};
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} // end namespace Geometry
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} // end namespace UE
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