Collider

Description

This component establishes a physics collider on an entity.

ColliderShape

Type	Description
Box	Box
Sphere	Sphere
Plane	Plane
Capsule	Capsule
Cone	Cone
Cylinder	Cylinder

ColliderType

Type	Description
Static	Applies to an object that does not move under simulation and behaves as if it has infinite mass
Dynamic	Applies to a fully simulated, real-life object affected by forces, gravity, and collisions.
Kinematic	Applies to an object whose motion is not affected by forces but is entirely controlled programmatically by the user. Unlike static bodies, kinematic bodies can move and can affect other dynamic bodies through collisions.

Properties

Property	Type	Default	Description
type	ecs.ColliderType	ecs.ColliderType.Static	Supported types include static, dynamic, and kinematic
shape	ecs.ColliderShape	ecs.ColliderShape.Box	Supported shape types include geometries and auto generated shapes from meshes
width	number	0	Width of Box or Plane shapes
height	number	0	Height of Box, Plane, Capsule, Cone, or Cylinder shapes
depth	number	0	Depth of Box shape
radius	number	0	Radius of Sphere, Capsule, Cone, or Cylinder shapes
mass	number	0	Mass of the entity
eventOnly	boolean	false	Determines if the object should only dispatch collision events, and not physically respond
gravityFactor	number	1	Factor of which to scale the world’s gravity
lockXAxis	boolean	false	Disables rotation on the X Axis
lockYAxis	boolean	false	Disables rotation on the Y Axis
lockZAxis	boolean	false	Disables rotation on the Z Axis
friction	number	0.5	The amount of contact friction on the entity
restitution	number	0	The bounciness of the entity, negative values absorb impact
linearDamping	number	0	The amount of air resistance while moving
angularDamping	number	0	The amount of air resistance while rotating
lockXPosition	boolean	false	Prevents movement of the collider along the X-axis
lockYPosition	boolean	false	Prevents movement of the collider along the Y-axis
lockZPosition	boolean	false	Prevents movement of the collider along the Z-axis
highPrecision	boolean	false	Enables continuous collision detection to increase precision of collision events
offsetX	number	0	Local X offset of the collider shape from the object origin
offsetY	number	0	Local Y offset of the collider shape from the object origin
offsetZ	number	0	Local Z offset of the collider shape from the object origin

Functions

Get

Returns a read-only reference.

Example

ecs.Collider.get(world, component.eid)

Set

Ensures the component exists on the entity, then assigns the (optional) data to the component.

Example

ecs.Collider.set(world, component.eid, {
  shape: ecs.ColliderShape.Sphere,
  type: ecs.ColliderType.Static,
  radius: 1,
  mass: 0,
  eventOnly: false,
  gravityFactory: 1,
  lockXAxis: false,
  lockYAxis: false,
  lockZAxis: false,
  friction: 0.5,
  restitution: 0,
  linearDamping: 0,
  angularDamping: 0
})

Mutate

Perform an update to the component within a callback function. Return true to indicate no changes made.

Example

ecs.Collider.mutate(world, component.eid, (cursor) => {
  cursor.mass = 5;
  cursor.friction = 0.8;
  return false;
})

Remove

Removes the component from the entity.

Example

ecs.Collider.remove(world, component.eid)

Has

Returns true if the component is present on the entity.

Example

ecs.Collider.has(world, component.eid)

Reset

Adds, or resets the component to its default state.

Example

ecs.Collider.reset(world, component.eid)

Advanced Functions

Cursor

Returns a mutable reference. Cursors are reused so only one cursor for each component can exist at a time.

Example

ecs.Collider.cursor(world, component.eid)

Acquire

Same behavior as cursor, but commit must be called after the cursor is done being used.

Example

ecs.Collider.acquire(world, component.eid)

Commit

Called after acquire. An optional third argument determines whether the cursor was mutated or not.

Example

ecs.Collider.commit(world, component.eid)
ecs.Collider.commit(world, component.eid, false)

Dirty

Mark the entity as having been mutated. Only needed in a specific case where systems are mutating data.

Example

ecs.Collider.dirty(world, component.eid)