Class Contact

Represents a contact point between two colliding shapes.

Contacts are pooled internally by the engine — they cannot be created directly. Access contacts via CollisionArbiter.contacts.

Fully modernized — wraps extracted ZPP_Contact directly.

Index

Constructors

Accessors

arbiter fresh friction penetration position

Methods

normalImpulse rollingImpulse tangentImpulse toString totalImpulse

Constructors

constructor

new Contact(): Contact
Returns Contact
- Defined in src/dynamics/Contact.ts:27

Accessors

arbiter

get arbiter(): CollisionArbiter | null
The collision arbiter this contact belongs to, or null.

Returns CollisionArbiter | null
- Defined in src/dynamics/Contact.ts:39

fresh

get fresh(): boolean
Whether this contact was newly created in the current step.

Returns boolean
- Defined in src/dynamics/Contact.ts:66

friction

get friction(): number
Friction value for this contact.

Returns number
- Defined in src/dynamics/Contact.ts:72

penetration

get penetration(): number
Penetration depth of this contact (positive = overlapping).

Returns number
- Defined in src/dynamics/Contact.ts:51

position

get position(): Vec2
World-space position of this contact point.

Returns Vec2
- Defined in src/dynamics/Contact.ts:57

Methods

normalImpulse

normalImpulse(body?: Body | null): Vec3
Normal impulse at this contact point.
Parameters
- body: Body | null = null
  If null, returns world-frame impulse. Otherwise returns impulse on the given body (must be one of the two in contact).
Returns Vec3
- Defined in src/dynamics/Contact.ts:86

rollingImpulse

rollingImpulse(body?: Body | null): number
Rolling impulse at this contact point.
Parameters
- body: Body | null = null
  If null, returns total rolling impulse. Otherwise returns rolling impulse on the given body.
Returns number
- Defined in src/dynamics/Contact.ts:142

tangentImpulse

tangentImpulse(body?: Body | null): Vec3
Tangent impulse at this contact point.
Parameters
- body: Body | null = null
  If null, returns world-frame impulse. Otherwise returns impulse on the given body.
Returns Vec3
- Defined in src/dynamics/Contact.ts:114

toString

toString(): string
Returns string
- Defined in src/dynamics/Contact.ts:185

totalImpulse

totalImpulse(body?: Body | null): Vec3
Total impulse (normal + tangent + rolling) at this contact point.
Parameters
- body: Body | null = null
  If null, returns world-frame impulse. Otherwise returns impulse on the given body.
Returns Vec3
- Defined in src/dynamics/Contact.ts:158