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  3. FMeshShapeGenerator

FMeshShapeGenerator

Base class for triangle mesh generators (eg like to generate sphere, cylinder, etc) Subclasses must implement Generate()

API > API/Runtime > API/Runtime/GeometryCore

Base class for triangle mesh generators (eg like to generate sphere, cylinder, etc) Subclasses must implement Generate()

   
Name FMeshShapeGenerator
Type class
Header File /Engine/Source/Runtime/GeometryCore/Public/Generators/MeshShapeGenerator.h
Include Path #include "Generators/MeshShapeGenerator.h"

Syntax

class FMeshShapeGenerator

Derived Classes

FMeshShapeGenerator derived class hierarchy

Destructors

Name Remarks Include Path Unreal Specifiers

virtual ~FMeshShapeGenerator()

   Generators/MeshShapeGenerator.h  

Variables

Public

Name Type Remarks Include Path Unreal Specifiers
bReverseOrientation bool If true, reverse orientation of created mesh Generators/MeshShapeGenerator.h  
NormalParentVertex TArray< int > Parent vertex index for each Normal. Same length as Normals array. Generators/MeshShapeGenerator.h  
Normals TArray< FVector3f > Array of Normals. Generators/MeshShapeGenerator.h  
TriangleNormals TArray< FIndex3i > Array of triangle corner Normals, stored as tuples of indices into Normals array. Generators/MeshShapeGenerator.h  
TrianglePolygonIDs TArray< int > Array of per-triangle integer polygon IDs. Same length as Triangles array. Generators/MeshShapeGenerator.h  
Triangles TArray< FIndex3i > Array of triangle corner positions, stored as tuples of indices into Vertices array Generators/MeshShapeGenerator.h  
TriangleUVs TArray< FIndex3i > Array of triangle corner UVs, stored as tuples of indices into UVs array. Generators/MeshShapeGenerator.h  
UVParentVertex TArray< int > Parent vertex index for each UV. Same length as UVs array. Generators/MeshShapeGenerator.h  
UVs TArray< FVector2f > Array of UV positions. Generators/MeshShapeGenerator.h  
Vertices TArray< FVector3d > Array of vertex positions Generators/MeshShapeGenerator.h  

Functions

Public

Name Remarks Include Path Unreal Specifiers

int AppendNormal ( const FVector3f& Normal,
int ParentVertex
)

   Generators/MeshShapeGenerator.h  

int AppendTriangle ( int A,
int B,
int C
)

   Generators/MeshShapeGenerator.h  

int AppendUV ( const FVector2f& UV,
int ParentVertex
)

   Generators/MeshShapeGenerator.h  

int AppendVertex ( const FVector3d& Position
)

 Append a new vertex at the given Position Generators/MeshShapeGenerator.h  

void ExtendBufferSizes ( int AddVertices,
int AddTriangles,
int AddUVs,
int AddNormals
)

 Extends the various internal buffers to the correct sizes for the given additional element counts Generators/MeshShapeGenerator.h  

FMeshShapeGenerator & Generate()

 Subclasses implement this to generate mesh Generators/MeshShapeGenerator.h  

bool HasAttributes()

   Generators/MeshShapeGenerator.h  

void Reset()

 Clear arrays so that Generate() can be run again Generators/MeshShapeGenerator.h  

void ResetAttributes ( bool bResetPolygonIDs
)

 Reset UV and normal-related on a generator, leaving vertices and triangles alone Generators/MeshShapeGenerator.h  

void SetBufferSizes ( int NumVertices,
int NumTriangles,
int NumUVs,
int NumNormals
)

 Set the various internal buffers to the correct sizes for the given element counts Generators/MeshShapeGenerator.h  

void SetNormal ( int Index,
const FVector3f& Normal,
int ParentVertex
)

 Set Normal at Index to given value with given ParentVertex Generators/MeshShapeGenerator.h  

void SetTriangle ( int Index,
int A,
int B,
int C,
bool bClockwiseOverride
)

   Generators/MeshShapeGenerator.h  

void SetTriangle ( int Index,
const FIndex3i& Tri
)

   Generators/MeshShapeGenerator.h  

void SetTriangle ( int Index,
int A,
int B,
int C
)

   Generators/MeshShapeGenerator.h  

void SetTriangleNormals ( int Index,
int A,
int B,
int C,
bool bClockwiseOverride
)

   Generators/MeshShapeGenerator.h  

void SetTriangleNormals ( int Index,
int A,
int B,
int C
)

   Generators/MeshShapeGenerator.h  

void SetTriangleNormals ( int Index,
const FIndex3i& Tri
)

   Generators/MeshShapeGenerator.h  

void SetTrianglePolygon ( int Index,
int PolygonID
)

   Generators/MeshShapeGenerator.h  

void SetTriangleUVs ( int Index,
const FIndex3i& Tri
)

   Generators/MeshShapeGenerator.h  

void SetTriangleUVs ( int Index,
int A,
int B,
int C,
bool bClockwiseOverride
)

   Generators/MeshShapeGenerator.h  

void SetTriangleUVs ( int Index,
int A,
int B,
int C
)

   Generators/MeshShapeGenerator.h  

void SetTriangleWithMatchedUVNormal ( int Index,
int A,
int B,
int C
)

 Set triangle and UVs and normals with matching indices Convenience function for shapes with no uv or normal seams Generators/MeshShapeGenerator.h  

void SetUV ( int Index,
const FVector2f& UV,
int ParentVertex
)

 Set UV at Index to given value with given ParentVertex Generators/MeshShapeGenerator.h  

void SetVertex ( int Index,
const FVector3d& Position
)

 Set vertex at Index to given Position Generators/MeshShapeGenerator.h  

Static

Name Remarks Include Path Unreal Specifiers

static FVector2f BilinearInterp ( const FVector2f& v00,
const FVector2f& v10,
const FVector2f& v11,
const FVector2f& v01,
float tx,
float ty
)

   Generators/MeshShapeGenerator.h  

static FVector2d BilinearInterp ( const FVector2d& v00,
const FVector2d& v10,
const FVector2d& v11,
const FVector2d& v01,
double tx,
double ty
)

   Generators/MeshShapeGenerator.h  

static FVector3d BilinearInterp ( const FVector3d& v00,
const FVector3d& v10,
const FVector3d& v11,
const FVector3d& v01,
double tx,
double ty
)

   Generators/MeshShapeGenerator.h  

static FVector3i LinearInterp ( const FVector3i& a,
const FVector3i& b,
double t
)

   Generators/MeshShapeGenerator.h  

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