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DynamicMesh

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Classes

  Type Name Description
Public class FColliderMesh FColliderMesh is a minimal representation of an Indexed Triangle Mesh suitable to use with a TMeshAABBTree3.  
Public class FColliderMeshProjectionTarget Projection target API wrapper for an FColliderMesh  
Public struct FComputeTangentsOptions Options used by TMeshTangents for tangents computation  
Public class FDynamicMesh3 FDynamicMesh3 is a dynamic triangle mesh class.  
Public class FDynamicMeshAttributeChangeSet FDynamicMeshAttributeChangeSet stores a set of UV and Normal changes for a FDynamicMesh3  
Public class FDynamicMeshAttributeSet FDynamicMeshAttributeSet manages a set of extended attributes for a FDynamicMesh3.  
Public class FDynamicMeshAttributeSetChangeTracker FDynamicMeshAttributeSetChangeTracker constructs a well-formed set of TDynamicMeshAttributeChange objects (stored in a FDynamicMeshAttributeChangeSet).  
Public class FDynamicMeshChange FDynamicMeshChange stores a "change" in a FDynamicMesh3, which in this context means the replacement of one set of triangles with a second set, that may have different vertices/attributes.  
Public class FDynamicMeshChangeTracker FDynamicMeshChangeTracker tracks changes to a FDynamicMesh and returns a FDynamicMeshChange instance that represents this change and allows it to be reverted/reapplied.  
Public class FDynamicMeshOctree3 FDynamicMeshOctree3 is an extension of FSparseDynamicOctree3 for the triangles of a FDynamicMesh3 instance.  
Public class FDynamicMeshTangents FDynamicMeshTangents is a helper object for accessing tangents stored in the AttributeSet of a FDynamicMesh3.  
Public class FDynamicMeshTriangleAttributeChange    
Public struct FEdgeCollapseInfo Information about mesh elements modified/removed by CollapseEdge()  
Public struct FEdgeFlipInfo Information about the mesh elements modified by a call to FlipEdge()  
Public struct FEdgeSplitInfo Information about the mesh elements created by a call to SplitEdge()  
Public struct FMergeEdgesInfo Information about mesh elements modified by MergeEdges()  
Public struct FMergeVerticesInfo Information about mesh elements modified by MergeVertices()  
Public class FMeshBones FMeshBones is a utility class for manipulating mesh bone attributes  
Public struct FMeshIndexMappings FMeshIndexMappings stores a set of integer IndexMaps for a mesh This is a convenient object to have, to avoid passing around large numbers of separate maps.  
Public class FMeshNormals FMeshNormals is a utility class that can calculate and store various types of normal vectors for a FDynamicMesh.  
Public struct FMeshTriEdgeID FMeshTriEdgeID identifies an edge in a triangle mesh based on the triangle ID/Index and the "edge index" 0/1/2 in the triangle.  
Public struct FMeshTriOrderedEdgeID FMeshTriOrderedEdgeID identifies an oriented edge in a triangle mesh based on indices into the triangle vertices.  
Public class FNonManifoldMappingSupport The FNonManifoldMappingSupport is a light-weight class that exists to interpret and manage additional DynamicMesh data stored when the mesh was created from a potentially non-manifold source mesh.  
Public struct FPokeTriangleInfo Information about mesh elements modified/created by PokeTriangle()  
Public struct FVertexInfo FVertexInfo stores information about vertex attributes - position, normal, color, UV  
Public struct FVertexSplitInfo Information about mesh elements modified/created by SplitVertex()  
Public class TConstObjectSharedAccess TConstObjectSharedAccess provides a way for the owner of some object (eg a Mesh) to share read-only access to that object with background threads.  
Public class TDynamicAttributeBase Base class for attributes that live on a dynamic mesh (or similar dynamic object)  
Public class TDynamicAttributeChangeBase Generic base class for change tracking of an attribute layer  
Public class TDynamicAttributeSetBase Generic base class for managing a set of registered attributes that must all be kept up to date  
Public class TDynamicBoneAttributeBase TDynamicAttributeBase is a base class for storing per-bone data.  
Public class TDynamicMeshAttributeChange TDynamicMeshAttributeChange represents a change to an attribute overlay of a FDynamicMesh3.  
Public class TDynamicMeshOverlay TDynamicMeshOverlay is an add-on to a FDynamicMesh3 that allows for per-triangle storage of an "element" (eg like a per-triangle UV or normal).  
Public class TDynamicMeshScalarTriangleAttribute TDynamicMeshScalarTriangleAttribute is an extension of TDynamicMeshTriangleAttribute for scalar-valued attributes.  
Public class TDynamicMeshTriangleAttribute TDynamicMeshTriangleAttribute is an add-on to a FDynamicMesh3 that allows for per-triangle storage of an attribute value.  
Public class TDynamicMeshVectorOverlay TDynamicMeshVectorOverlay is an convenient extension of TDynamicMeshOverlay that adds a specific N-element Vector type to the template, and adds accessor functions that convert between that N-element vector type and the N-element arrays used by TDynamicMeshOverlay.  
Public class TDynamicPointSet3 TDynamicPointSet3 implements a dynamic 3D point set, templated on real-value type (float or double).  
Public class TDynamicVertexAttribute TDynamicVertexAttribute provides per-vertex storage of an attribute value  
Public class TDynamicVertexAttributeChange    
Public class TDynamicVertexSkinWeightsAttribute Forward declarations  
Public class TDynamicVertexSkinWeightsAttributeChange    
Public class TDynamicVerticesOctree3 TDynamicVerticesOctree3 is an extension of FSparseDynamicPointOctree3 for the vertices of a FDynamicXYZ3 instance (eg FDynamicMesh3, TDynamicPointSet3, FDynamicGraph, etc) This extension does several things: 1) provides a simplified API based on vertex IDs to various Octree functions 2) tracks ModifiedBounds box of modified areasThe template expansion requires that FDynamicXYZ3 has the following API: 1) a function int MaxVertexID() that returns the maximum vertex ID/index 2) a function bool IsVertex(int) that returns true if the index is valid 3) a function FVector3d GetVertex(int index) that returns the position of a vertex 4) a function FAxisAlignedBox3d GetBounds() that returns a bounding-box of the point set  
Public class TMeshTangents TMeshTangents is a utility class that can calculate and store various types of tangent vectors for a FDynamicMesh.  

Typedefs

Name Description
FDynamicMeshAABBTree3  
FDynamicMeshAttributeBase  
FDynamicMeshAttributeChangeBase  
FDynamicMeshAttributeSetBase  
FDynamicMeshBoneColorAttribute  
FDynamicMeshBoneNameAttribute  
FDynamicMeshBoneParentIndexAttribute  
FDynamicMeshBonePoseAttribute  
FDynamicMeshColorChange Standard Color overlay change type - 4-element float
FDynamicMeshColorOverlay Standard Color overlay type - 4-element float (rbga)
FDynamicMeshMaterialAttribute Standard per-triangle integer material ID
FDynamicMeshNormalChange Standard Normal overlay change type - 3-element float
FDynamicMeshNormalOverlay Standard Normal overlay type - 3-element float
FDynamicMeshPolygroupAttribute Per-triangle integer polygroup ID
FDynamicMeshTriGroupChange Standard per-triangle integer attribute change type
FDynamicMeshUVChange Standard UV overlay change type - 2-element float
FDynamicMeshUVOverlay Standard UV overlay type - 2-element float
FDynamicMeshVertexSkinWeightsAttribute  
FDynamicMeshWeightAttribute Per-vertex scalar float weight
FDynamicMeshWeightChange Standard weight map change type - 1-element float
FDynamicPointSet3d  
FDynamicPointSet3f  
FMeshTangentsd  
FMeshTangentsf  
FSharedConstDynamicMesh3  
TDynamicMeshVertexAttribute  

Enums

  Type Name Description
Public enum UE::Geometry::EMeshComponents Copyright Epic Games, Inc. All Rights Reserved.  

Functions

  Type Name Description
Public function void

MeshTransforms::ApplyTransform ( FDynamicMesh3& Mesh,
TFunctionRef< FVector3d(const FVector3d&)> PositionTransform,
TFunctionRef< FVector3f(const FVector3f&)> NormalTransform,
TFunctionRef< FVector3f(const FVector3f&)> TangentTransform
)

 Apply given Transform to a Mesh.
Public function void

MeshTransforms::ApplyTransform ( FDynamicMesh3& Mesh,
const FTransformSRT3d& Transform,
bool bReverseOrientationIfNeeded
)

 Apply given Transform to a Mesh.
Public function void

MeshTransforms::ApplyTransform ( FDynamicMesh3& Mesh,
TFunctionRef< FVector3d(const FVector3d&)> PositionTransform,
TFunctionRef< FVector3f(const FVector3f&)> NormalTransform
)

 Apply given Transform to a Mesh.
Public function void

MeshTransforms::ApplyTransformInverse ( FDynamicMesh3& Mesh,
const FTransformSRT3d& Transform,
bool bReverseOrientationIfNeeded
)

 Apply inverse of given Transform to a Mesh.
Public function void Transform Mesh out of local coordinates of Frame
Public function void If applying Transform would invert Mesh w/ a negative scale, then invert Mesh's triangle orientations.
Public function void

MeshTransforms::Rotate ( FDynamicMesh3& Mesh,
const FRotator& Rotation,
const FVector3d& RotationOrigin
)

 Apply Rotation to the vertex positions, relative to the given RotationOrigin.
Public function void

MeshTransforms::Scale ( FDynamicMesh3& Mesh,
const FVector3d& Scale,
const FVector3d& Origin,
bool bReverseOrientationIfNeeded,
bool bOnlyPositions
)

 Apply Scale to vertex positions of Mesh, relative to given Origin.
Public function void

MeshTransforms::Translate ( FDynamicMesh3& Mesh,
const FVector3d& Translation
)

 Apply Translation to vertex positions of Mesh. Does not modify any other attributes.
Public function void Transform Mesh into local coordinates of Frame
Public function void

UE::Geometry::CollectVertexPositions ( const FDynamicMesh3& Mesh,
EnumeratorType Enumeration,
SetType& Output
)

 Call SetType.Add(VertexPosition) for all valid vertex indices in for_each(Enumeration)
Public function bool

UE::Geometry::CompactAttributeValues ( const FDynamicMesh3& Mesh,
TDynamicMeshScalarTriangleAttribute< int32 >& TriangleAttrib,
FInterval1i& OldMaxAttributeRangeOut,
int& NewMaxAttributeValueOut,
TArray< int32 >& OldToNewMapOut,
TArray< int32 >& NewToOldMapOut,
bool& bWasCompactOut
)

 Compact the values of an integer Triangle Attribute, ie so that the attribute values are dense in range 0..N.
Public function bool

UE::Geometry::CopyVertexNormalsToOverlay ( const FDynamicMesh3& Mesh,
FDynamicMeshNormalOverlay& NormalOverlayOut,
bool bCompactElements
)

 Copies vertex normals to a given overlay (clearing it before use if it has any elements).
Public function bool

UE::Geometry::CopyVertexUVsToOverlay ( const FDynamicMesh3& Mesh,
FDynamicMeshUVOverlay& UVOverlayOut,
bool bCompactElements
)

 Copies vertex UVs to a given overlay (clearing it before use if it has any elements).
Public function void Discard all debug meshes stored in the global Debug Meshes map
Public function bool

UE::Geometry::Debug::FetchDebugMesh ( FString DebugMeshName,
FDynamicMesh3& MeshOut,
bool bClear
)

 If a mesh was previously stored via StashDebugMesh with the given DebugMeshName, copy it to MeshOut, and optionally remove it from the Debug Meshes map
Public function void Store a copy of Mesh in a global Debug Meshes TMap.
Public function FIndex3i

UE::Geometry::FindNextAdjacentTriangleAroundVtx ( const FDynamicMesh3* Mesh,
int32 VertexID,
int32 FromTriangleID,
int32 PrevTriangleID,
TrisConnectedPredicate TrisConnectedTest
)

 Walk around VertexID from FromTriangleID to next connected triangle if it exists, walking "away" from PrevTriangleID.
Public function int32

UE::Geometry::FindSharedEdgeInTriangles ( const FDynamicMesh3& Mesh,
int32 Triangle0,
int32 Triangle1
)

  
Public function FIndex2i

UE::Geometry::FindVertexEdgesInTriangle ( const FDynamicMesh3& Mesh,
int32 TriangleID,
int32 VertexID
)

 Find the two edges in a Triangle that are connected to a given Vertex of the triangle
Public function FPointSetAdapterd  
Public function FTriangleMeshAdapterd  
Public function FPointSetAdapterd  
Public function FPointSetAdapterd  
Public function FTriangleMeshAdapterd  
Public function FPointSetAdapterd  
Public function FPointSetAdapterd  
Public function bool

UE::Geometry::SplitBoundaryVertexTrianglesIntoSubsets ( const FDynamicMesh3* Mesh,
int32 VertexID,
int32 SplitEdgeID,
TArray< int32 >& TriangleSet0,
TArray< int32 >& TriangleSet1
)

 Split the triangle one-ring at VertexID into two triangle sets by "cutting" it with edge SplitEdgeID that is connected to VertexID.
Public function bool

UE::Geometry::SplitInteriorVertexTrianglesIntoSubsets ( const FDynamicMesh3* Mesh,
int32 VertexID,
int32 SplitEdgeID0,
int32 SplitEdgeID1,
TArray< int32 >& TriangleSet0,
TArray< int32 >& TriangleSet1
)

 Split the triangle one-ring at VertexID into two triangle sets by "cutting" it with two edges SplitEdgeID0 and SplitEdgeID1 that are both connected to VertexID.
Public function void

UE::Geometry::TrianglesToOverlayElements ( const OverlayType* Overlay,
EnumeratorType TriangleEnumeration,
OutputSetType& ElementsOut
)

 For a given list/enumeration of Triangles, and an Overlay, find all the Elements in all the Triangles.
Public function void

UE::Geometry::TriangleToVertexIDs ( const FDynamicMesh3* Mesh,
const TArray< int >& TriangleIDs,
TArray< int >& VertexIDsOut
)

 Find list of unique vertices that are contained in one or more triangles
Public function void

UE::Geometry::VertexToTriangleOneRing ( const FDynamicMesh3* Mesh,
const TArray< int >& VertexIDs,
TSet< int >& TriangleIDsOut
)

 Find all the triangles in all the one rings of a set of vertices

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