godot-docs/classes/class_concavepolygonshape2d.rst

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.. _class_ConcavePolygonShape2D:

ConcavePolygonShape2D
=====================

**Inherits:** :ref:`Shape2D<class_Shape2D>` **<** :ref:`Resource<class_Resource>` **<** :ref:`Reference<class_Reference>` **<** :ref:`Object<class_Object>`

**Category:** Core

Brief Description
-----------------

Concave polygon 2D shape resource for physics.

Properties
----------

+-------------------------------------------------+----------------------------------------------------------------+----------------------+
| :ref:`PoolVector2Array<class_PoolVector2Array>` | :ref:`segments<class_ConcavePolygonShape2D_property_segments>` | PoolVector2Array(  ) |
+-------------------------------------------------+----------------------------------------------------------------+----------------------+

Description
-----------

Concave polygon 2D shape resource for physics. It is made out of segments and is optimal for complex polygonal concave collisions. However, it is not advised to use for :ref:`RigidBody2D<class_RigidBody2D>` nodes. A CollisionPolygon2D in convex decomposition mode (solids) or several convex objects are advised for that instead. Otherwise, a concave polygon 2D shape is better for static collisions.

The main difference between a :ref:`ConvexPolygonShape2D<class_ConvexPolygonShape2D>` and a ``ConcavePolygonShape2D`` is that a concave polygon assumes it is concave and uses a more complex method of collision detection, and a convex one forces itself to be convex in order to speed up collision detection.

Property Descriptions
---------------------

.. _class_ConcavePolygonShape2D_property_segments:

- :ref:`PoolVector2Array<class_PoolVector2Array>` **segments**

+-----------+----------------------+
| *Default* | PoolVector2Array(  ) |
+-----------+----------------------+
| *Setter*  | set_segments(value)  |
+-----------+----------------------+
| *Getter*  | get_segments()       |
+-----------+----------------------+

The array of points that make up the ``ConcavePolygonShape2D``'s line segments.