Module engine 

Main polygon clipping engine

Direct port from clipper.engine.h and clipper.engine.cpp Copyright (c) Angus Johnson 2010-2025 This is the core clipping module implementing the Vatti sweep-line algorithm

Structs

Active

Active edge in the sweep line Direct port from clipper.engine.h line 104

ClipperBase

Main clipping engine. Manages all arenas and the sweep-line algorithm state. Direct port from clipper.engine.h line 192

HorzJoin

Horizontal join between two output points Direct port from clipper.engine.h line 156

HorzSegment

Horizontal segment for horizontal edge processing Direct port from clipper.engine.h line 148

IntersectNode

Intersection between two active edges Direct port from clipper.engine.h line 139

LocalMinima

Local minimum vertex where ascending and descending bounds meet Direct port from clipper.engine.h line 131

OutPt

Output point in the clipping result (circular doubly-linked list) Direct port from clipper.engine.h line 55

OutRec

Output polygon record Direct port from clipper.engine.h line 79

Vertex

Input polygon vertex (circular doubly-linked list via arena indices) Direct port from clipper.engine.h line 48

VertexFlags

Vertex flags (bitflags) Direct port from clipper.engine.h line 34

Enums

ClipType

Type of clipping operation Direct port from clipper.engine.h line 29

JoinWith

How an edge joins with another (for horizontal processing) Direct port from clipper.engine.h line 32

PathType

Whether a path is Subject or Clip Direct port from clipper.engine.h line 31

Constants

NONE