ManifoldPoint class

A manifold point is a contact point belonging to a contact manifold. It holds details related to the geometry and dynamics of the contact points. The local point usage depends on the manifold type:

• e_circles: the local center of circleB.
• e_faceA: the local center of cirlceB or the clip point of polygonB.
• e_faceB: the clip point of polygonA.

This structure is stored across time steps, so we keep it small. Note: the impulses are used for internal caching and may not provide reliable contact forces, especially for high speed collisions.

Constructors

ManifoldPoint.new()

Blank manifold point with everything zeroed out.

ManifoldPoint.copy(ManifoldPoint manifoldPoint)

Creates a manifold point as a copy of the given point.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

id → ContactID

uniquely identifies a contact point between two shapes

final

localPoint → Vector2

usage depends on manifold type

final

normalImpulse ↔ double

the non-penetration impulse

getter/setter pair

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

tangentImpulse ↔ double

the friction impulse

getter/setter pair

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

set(ManifoldPoint manifoldPoint) → void

Sets this manifold point form the given one.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited