PhysicsMaterial class Physics

Surface properties (friction, restitution, density) of a collider.

Materials are immutable, identity-shared value objects: assign one instance to many colliders and the backend will cook it once.

Constructors

PhysicsMaterial({double friction = 0.5, double restitution = 0.0, double density = 1.0, CombineRule frictionCombine = CombineRule.average, CombineRule restitutionCombine = CombineRule.average})

const

Properties

density → double

Mass per unit volume. Used by the backend to derive mass and inertia from the collider's Shape when the owning rigid body has no explicit mass set.

final

friction → double

Coulomb friction coefficient. Typical range is [0, 1]; higher values produce more resistance to sliding.

final

frictionCombine → CombineRule

Rule for combining this material's friction with the other participating material's friction at a contact.

final

hashCode → int

The hash code for this object.

no setter, inherited

restitution → double

Bounciness, in [0, 1]. 0 is fully inelastic; 1 preserves kinetic energy on bounce.

final

restitutionCombine → CombineRule

Rule for combining this material's restitution with the other participating material's restitution at a contact.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited

Constants

defaultMaterial → const PhysicsMaterial

Reasonable defaults: friction 0.5, restitution 0.0, density 1.0, both combine rules CombineRule.average.