godot-docs/classes/class_collisionpolygon2d.rst

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.. _class_CollisionPolygon2D:

CollisionPolygon2D
==================

**Inherits:** :ref:`Node2D<class_Node2D>` **<** :ref:`CanvasItem<class_CanvasItem>` **<** :ref:`Node<class_Node>` **<** :ref:`Object<class_Object>`

A node that provides a polygon shape to a :ref:`CollisionObject2D<class_CollisionObject2D>` parent.

.. rst-class:: classref-introduction-group

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

A node that provides a polygon shape to a :ref:`CollisionObject2D<class_CollisionObject2D>` parent and allows to edit it. The polygon can be concave or convex. This can give a detection shape to an :ref:`Area2D<class_Area2D>`, turn :ref:`PhysicsBody2D<class_PhysicsBody2D>` into a solid object, or give a hollow shape to a :ref:`StaticBody2D<class_StaticBody2D>`.

\ **Warning:** A non-uniformly scaled :ref:`CollisionShape2D<class_CollisionShape2D>` will likely not behave as expected. Make sure to keep its scale the same on all axes and adjust its shape resource instead.

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Properties
----------

.. table::
   :widths: auto

   +-----------------------------------------------------+---------------------------------------------------------------------------------------------+--------------------------+
   | :ref:`BuildMode<enum_CollisionPolygon2D_BuildMode>` | :ref:`build_mode<class_CollisionPolygon2D_property_build_mode>`                             | ``0``                    |
   +-----------------------------------------------------+---------------------------------------------------------------------------------------------+--------------------------+
   | :ref:`bool<class_bool>`                             | :ref:`disabled<class_CollisionPolygon2D_property_disabled>`                                 | ``false``                |
   +-----------------------------------------------------+---------------------------------------------------------------------------------------------+--------------------------+
   | :ref:`bool<class_bool>`                             | :ref:`one_way_collision<class_CollisionPolygon2D_property_one_way_collision>`               | ``false``                |
   +-----------------------------------------------------+---------------------------------------------------------------------------------------------+--------------------------+
   | :ref:`float<class_float>`                           | :ref:`one_way_collision_margin<class_CollisionPolygon2D_property_one_way_collision_margin>` | ``1.0``                  |
   +-----------------------------------------------------+---------------------------------------------------------------------------------------------+--------------------------+
   | :ref:`PackedVector2Array<class_PackedVector2Array>` | :ref:`polygon<class_CollisionPolygon2D_property_polygon>`                                   | ``PackedVector2Array()`` |
   +-----------------------------------------------------+---------------------------------------------------------------------------------------------+--------------------------+

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Enumerations
------------

.. _enum_CollisionPolygon2D_BuildMode:

.. rst-class:: classref-enumeration

enum **BuildMode**: :ref:`🔗<enum_CollisionPolygon2D_BuildMode>`

.. _class_CollisionPolygon2D_constant_BUILD_SOLIDS:

.. rst-class:: classref-enumeration-constant

:ref:`BuildMode<enum_CollisionPolygon2D_BuildMode>` **BUILD_SOLIDS** = ``0``

Collisions will include the polygon and its contained area. In this mode the node has the same effect as several :ref:`ConvexPolygonShape2D<class_ConvexPolygonShape2D>` nodes, one for each convex shape in the convex decomposition of the polygon (but without the overhead of multiple nodes).

.. _class_CollisionPolygon2D_constant_BUILD_SEGMENTS:

.. rst-class:: classref-enumeration-constant

:ref:`BuildMode<enum_CollisionPolygon2D_BuildMode>` **BUILD_SEGMENTS** = ``1``

Collisions will only include the polygon edges. In this mode the node has the same effect as a single :ref:`ConcavePolygonShape2D<class_ConcavePolygonShape2D>` made of segments, with the restriction that each segment (after the first one) starts where the previous one ends, and the last one ends where the first one starts (forming a closed but hollow polygon).

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

.. _class_CollisionPolygon2D_property_build_mode:

.. rst-class:: classref-property

:ref:`BuildMode<enum_CollisionPolygon2D_BuildMode>` **build_mode** = ``0`` :ref:`🔗<class_CollisionPolygon2D_property_build_mode>`

.. rst-class:: classref-property-setget

- |void| **set_build_mode**\ (\ value\: :ref:`BuildMode<enum_CollisionPolygon2D_BuildMode>`\ )
- :ref:`BuildMode<enum_CollisionPolygon2D_BuildMode>` **get_build_mode**\ (\ )

Collision build mode. Use one of the :ref:`BuildMode<enum_CollisionPolygon2D_BuildMode>` constants.

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.. _class_CollisionPolygon2D_property_disabled:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **disabled** = ``false`` :ref:`🔗<class_CollisionPolygon2D_property_disabled>`

.. rst-class:: classref-property-setget

- |void| **set_disabled**\ (\ value\: :ref:`bool<class_bool>`\ )
- :ref:`bool<class_bool>` **is_disabled**\ (\ )

If ``true``, no collisions will be detected.

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.. _class_CollisionPolygon2D_property_one_way_collision:

.. rst-class:: classref-property

:ref:`bool<class_bool>` **one_way_collision** = ``false`` :ref:`🔗<class_CollisionPolygon2D_property_one_way_collision>`

.. rst-class:: classref-property-setget

- |void| **set_one_way_collision**\ (\ value\: :ref:`bool<class_bool>`\ )
- :ref:`bool<class_bool>` **is_one_way_collision_enabled**\ (\ )

If ``true``, only edges that face up, relative to **CollisionPolygon2D**'s rotation, will collide with other objects.

\ **Note:** This property has no effect if this **CollisionPolygon2D** is a child of an :ref:`Area2D<class_Area2D>` node.

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.. _class_CollisionPolygon2D_property_one_way_collision_margin:

.. rst-class:: classref-property

:ref:`float<class_float>` **one_way_collision_margin** = ``1.0`` :ref:`🔗<class_CollisionPolygon2D_property_one_way_collision_margin>`

.. rst-class:: classref-property-setget

- |void| **set_one_way_collision_margin**\ (\ value\: :ref:`float<class_float>`\ )
- :ref:`float<class_float>` **get_one_way_collision_margin**\ (\ )

The margin used for one-way collision (in pixels). Higher values will make the shape thicker, and work better for colliders that enter the polygon at a high velocity.

.. rst-class:: classref-item-separator

----

.. _class_CollisionPolygon2D_property_polygon:

.. rst-class:: classref-property

:ref:`PackedVector2Array<class_PackedVector2Array>` **polygon** = ``PackedVector2Array()`` :ref:`🔗<class_CollisionPolygon2D_property_polygon>`

.. rst-class:: classref-property-setget

- |void| **set_polygon**\ (\ value\: :ref:`PackedVector2Array<class_PackedVector2Array>`\ )
- :ref:`PackedVector2Array<class_PackedVector2Array>` **get_polygon**\ (\ )

The polygon's list of vertices. Each point will be connected to the next, and the final point will be connected to the first.

\ **Note:** The returned vertices are in the local coordinate space of the given **CollisionPolygon2D**.

**Note:** The returned array is *copied* and any changes to it will not update the original property value. See :ref:`PackedVector2Array<class_PackedVector2Array>` for more details.

.. |virtual| replace:: :abbr:`virtual (This method should typically be overridden by the user to have any effect.)`
.. |const| replace:: :abbr:`const (This method has no side effects. It doesn't modify any of the instance's member variables.)`
.. |vararg| replace:: :abbr:`vararg (This method accepts any number of arguments after the ones described here.)`
.. |constructor| replace:: :abbr:`constructor (This method is used to construct a type.)`
.. |static| replace:: :abbr:`static (This method doesn't need an instance to be called, so it can be called directly using the class name.)`
.. |operator| replace:: :abbr:`operator (This method describes a valid operator to use with this type as left-hand operand.)`
.. |bitfield| replace:: :abbr:`BitField (This value is an integer composed as a bitmask of the following flags.)`
.. |void| replace:: :abbr:`void (No return value.)`