Fixture Class

A fixture is used to attach a Shape to a body for collision detection. A fixture inherits its transform from its parent. Fixtures hold additional non-geometric data such as friction, collision filters, etc.

Inheritance Hierarchy

SystemObject
Internal.tainicom.Aether.Physics2D.DynamicsFixture

Namespace: Internal.tainicom.Aether.Physics2D.Dynamics
Assembly: NeoAxis.Core (in NeoAxis.Core.dll) Version: 2026.1.1.0 (2026.1.1.0)

Syntax

Copy

public class Fixture

The Fixture type exposes the following members.

Constructors

	Name	Description
	Fixture	Initializes a new instance of the Fixture class

Top

Properties

	Name	Description
	Body	Get the parent body of this fixture. This is null if the fixture is not attached.
	CollidesWith	Defaults to Category.All The collision mask bits. This states the categories that this fixture would accept for collision.
	CollisionCategories	The collision categories this fixture is a part of. Defaults to Category.Cat1
	CollisionGroup	Defaults to 0 Collision groups allow a certain group of objects to never collide (negative) or always collide (positive). Zero means no collision group. Non-zero group filtering always wins against the mask bits.
	Friction	Set the coefficient of friction. This will _not_ change the friction of existing contacts.
	IsSensor	Gets or sets a value indicating whether this fixture is a sensor.
	Proxies
	ProxyCount
	Restitution	Set the coefficient of restitution. This will not change the restitution of existing contacts.
	Shape	Get the child Shape.

Top

Methods

	Name	Description
	CloneOnto	Clones the fixture onto the specified body.
	Equals	Determines whether the specified object is equal to the current object. (Inherited from Object)
	Finalize	Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object)
	GetAABB	Get the fixture's AABB. This AABB may be enlarge and/or stale. If you need a more accurate AABB, compute it using the Shape and the body transform.
	GetHashCode	Serves as the default hash function. (Inherited from Object)
	GetType	Gets the Type of the current instance. (Inherited from Object)
	MemberwiseClone	Creates a shallow copy of the current Object. (Inherited from Object)
	RayCast	Cast a ray against this Shape.
	TestPoint	Test a point for containment in this fixture.
	ToString	Returns a string that represents the current object. (Inherited from Object)

Top

Fields

	Name	Description
	AfterCollision	Fires after two shapes has collided and are solved. This gives you a chance to get the impact force.
	BeforeCollision	Fires when two fixtures are close to each other. Due to how the broadphase works, this can be quite inaccurate as shapes are approximated using AABBs.
	OnCollision	Fires when two shapes collide and a contact is created between them. Note that the first fixture argument is always the fixture that the delegate is subscribed to.
	OnSeparation	Fires when two shapes separate and a contact is removed between them. Note: This can in some cases be called multiple times, as a fixture can have multiple contacts. Note The first fixture argument is always the fixture that the delegate is subscribed to.
	Tag	Set the user data. Use this to store your application specific data.

Top

Extension Methods

	Name	Description
	MethodInvoke	Calls the object method by name. (Defined by ObjectEx)
	PropertyGet	Gets the value of the object property by name. (Defined by ObjectEx)
	PropertyGetT	Gets the value of the object property by name. (Defined by ObjectEx)
	PropertySet	Sets the value of the object property by name. (Defined by ObjectEx)

Top

Reference

Internal.tainicom.Aether.Physics2D.Dynamics Namespace