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  3. FGeomTools2D

FGeomTools2D

API > API/Runtime > API/Runtime/Engine

   
Name FGeomTools2D
Type class
Header File /Engine/Source/Runtime/Engine/Public/GeomTools.h
Include Path #include "GeomTools.h"

Syntax

class FGeomTools2D

Functions

Static

Name Remarks Include Path Unreal Specifiers

static bool ArePolygonsValid ( const TArray< TArray< FVector2D > >& Polygons
)

 Checks that these polygons can be successfully triangulated. GeomTools.h  

static void CorrectPolygonWinding ( TArray< FVector2D >& OutVertices,
const TArray< FVector2D >& Vertices,
const bool bNegativeWinding
)

 Corrects the polygon winding to match bNegativeWinding Ie. GeomTools.h  

static void GenerateConvexHullFromPoints ( TArray< FVector2D >& OutConvexHull,
TArray< FVector2D >& Points
)

 Generate convex hull from points. GeomTools.h  

static void GenerateConvexPolygonsFromTriangles ( TArray< TArray< FVector2D > >& OutPolygons,
const TArray< FVector2D >& InTriangles
)

 Generate convex shapes. GeomTools.h  

static bool IsPointInPolygon ( const FVector2D& TestPoint,
const TArray< FVector2D >& PolygonPoints
)

 Returns true if TestPoint is inside the polygon defined by PolygonPoints. GeomTools.h  

static bool IsPolygonWindingCCW ( const TArray< FVector2D >& Points
)

 Returns true if the points forming a polygon have CCW winding Returns true if the polygon isn't valid GeomTools.h  

static bool IsPolygonWindingCCW ( const TArray< FIntPoint >& Points
)

   GeomTools.h  

static TArray< TArray< FVector2D > > ReducePolygons ( const TArray< TArray< FVector2D > >& Polygons,
const TArray< bool >& PolygonNegativeWinding
)

 Merge additive and subtractive polygons, split them up into additive polygons Assumes all polygons and overlapping polygons are valid, and the windings match the setting on the polygon GeomTools.h  

static void RemoveRedundantTriangles ( TArray< FVector2D >& OutTriangles,
const TArray< FVector2D >& InTriangles
)

 2D version of RemoveRedundantTriangles from GeomTools GeomTools.h  

static bool TriangulatePoly ( TArray< FVector2D >& OutTris,
const TArray< FVector2D >& PolygonVertices,
bool bKeepColinearVertices
)

 Triangulate a polygon. Check notes in implementation. GeomTools.h  

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