FRawMesh Struct Reference

#include <RawMesh.h>

Public Member Functions
RAWMESH_API void	Empty ()
RAWMESH_API bool	IsValid () const
RAWMESH_API bool	IsValidOrFixable () const
FVector3f	GetWedgePosition (int32 WedgeIndex) const
RAWMESH_API void	CompactMaterialIndices ()

Public Attributes
TArray< int32 >	FaceMaterialIndices
TArray< uint32 >	FaceSmoothingMasks
TArray< FVector3f >	VertexPositions
TArray< uint32 >	WedgeIndices
TArray< FVector3f >	WedgeTangentX
TArray< FVector3f >	WedgeTangentY
TArray< FVector3f >	WedgeTangentZ
TArray< FVector2f >	WedgeTexCoords [MAX_MESH_TEXTURE_COORDS]
TArray< FColor >	WedgeColors
TArray< int32 >	MaterialIndexToImportIndex

Detailed Description

Raw mesh data used to construct optimized runtime rendering streams.

A note on terminology. Information is stored at various frequencies as defined here: Face - A single polygon in the mesh. Currently all code assumes this is a triangle but conceptually any polygon would do. Corner - Each face has N corners. As all faces are currently triangles, N=3. Wedge - Properties stored for each corner of each face. Index with FaceIndex * NumCorners + CornerIndex. Vertex - Properties shared by overlapping wedges of adjacent polygons. Typically these properties relate to position. Index with VertexIndices[WedgeIndex].

Additionally, to ease in backwards compatibility all properties should use only primitive types!

Member Function Documentation

CompactMaterialIndices()

void FRawMesh::CompactMaterialIndices

(

)

Compacts materials by removing any that have no associated triangles. Also updates the material index map.

Empty()

void FRawMesh::Empty

(

)

Empties all data streams.

GetWedgePosition()

FVector3f FRawMesh::GetWedgePosition ( int32  WedgeIndex ) const

inline

Helper for getting the position of a wedge.

IsValid()

bool FRawMesh::IsValid

(

)

const

Returns true if the mesh contains valid information.

• Validates that stream sizes match.
• Validates that there is at least one texture coordinate.
• Validates that indices are valid positions in the vertex stream.

IsValidOrFixable()

bool FRawMesh::IsValidOrFixable

(

)

const

Returns true if the mesh contains valid information or slightly invalid information that we can fix.

• Validates that stream sizes match.
• Validates that there is at least one texture coordinate.
• Validates that indices are valid positions in the vertex stream.

Member Data Documentation

FaceMaterialIndices

TArray<int32> FRawMesh::FaceMaterialIndices

Material index. Array[FaceId] = int32

FaceSmoothingMasks

TArray<uint32> FRawMesh::FaceSmoothingMasks

Smoothing mask. Array[FaceId] = uint32

MaterialIndexToImportIndex

TArray<int32> FRawMesh::MaterialIndexToImportIndex

Map from material index -> original material index at import time. It's valid for this to be empty in which case material index == original material index.

VertexPositions

TArray<FVector3f> FRawMesh::VertexPositions

Position in local space. Array[VertexId] = float3(x,y,z)

WedgeColors

TArray<FColor> FRawMesh::WedgeColors

Color. Array[WedgeId]=float3(r,g,b,a)

WedgeIndices

TArray<uint32> FRawMesh::WedgeIndices

Index of the vertex at this wedge. Array[WedgeId] = VertexId

WedgeTangentX

TArray<FVector3f> FRawMesh::WedgeTangentX

Tangent, U direction. Array[WedgeId] = float3(x,y,z)

WedgeTangentY

TArray<FVector3f> FRawMesh::WedgeTangentY

Tangent, V direction. Array[WedgeId] = float3(x,y,z)

WedgeTangentZ

TArray<FVector3f> FRawMesh::WedgeTangentZ

Normal. Array[WedgeId] = float3(x,y,z)

WedgeTexCoords

TArray<FVector2f> FRawMesh::WedgeTexCoords[MAX_MESH_TEXTURE_COORDS]

Texture coordinates. Array[UVId][WedgeId]=float2(u,v)

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The documentation for this struct was generated from the following files:

• Engine/Source/Runtime/RawMesh/Public/RawMesh.h
• Engine/Source/Runtime/RawMesh/Private/RawMesh.cpp