Box2D. Box2dObject

Add a box shape to the body

Add a circle shape to the body

Add an edge shape to the body

Add an edge list to the body

Add an edge loop to the body, an edge loop connects the end points

Add a polygon shape to the body, the convex hull of its points; Box2D takes 3 to 8 points, not all in a line, and no fixture is made from any other; points closer than .001 count as one

Add a random polygon shape to the body

Add a regular polygon shape to the body

Add a shape fixture to the body

Apply acceleration to this object (changes velocity by acceleration, mass-independent like EngineObject.applyAcceleration, but in units per second). Use applyImpulse if you want the mass-dependent velocity change Δv = impulse / mass, or applyForce for a Newton-style sustained force.

Apply angular acceleration to this object (changes angular velocity by acceleration, mass-independent, clockwise — matches EngineObject.applyAngularAcceleration).

Apply an instantaneous angular impulse. Changes angular velocity by impulse / inertia immediately, clockwise like angle.

Apply force to this object

Apply an instantaneous linear impulse. Changes velocity immediately by impulse / mass (so heavier bodies move less for the same impulse).

Apply torque to this object, clockwise like angle

Called when a contact begins, while the world steps: a destroy or a setter waits until the step is done, and creating objects, fixtures or joints must wait until after the step

• The fixtures say which shapes touched, the same objects addBox and the others returned, so a small sensor under a player's feet can tell standing on the ground from touching a wall

Destroy this object and its physics body

Destroy all fixtures from the body, from a contact callback once the step is done

Destroy a fixture from the body, from a contact callback once the step is done

Draws all this object's fixtures

Called when a contact ends, while the world steps or a body is destroyed: a destroy or a setter waits until the step is done, and creating objects, fixtures or joints must wait until after the step

Gets the angular velocity, clockwise like angle

Gets the physics body type

Gets the center of mass in world space

Get list of fixtures for this object

Gets the rotational inertia about the center of mass

Check if this object is awake

Get list of joints for this object, the Box2dJoint for each one made through LittleJS, and the Box2D joint, cast to its type, for any made on the world directly

Gets the linear velocity

Gets the mass

Get the speed of this object

Check if this object has any fixtures

Check if this object has any joints

Render the object, uses box2d drawing if no tile info exists

Render debug info

Reset the mass, center of mass, and moment, from a contact callback once the step is done

Sets the angle, from a contact callback the body turns once the step is done, keeping the position it has then

Sets the angular damping

Sets the angular velocity, clockwise like angle

Set the sleep state of the body

Set the physics body type, from a contact callback it changes once the step is done

Should be like a bullet for continuous collision detection?

Set the center of mass of the body, local to it

Set the collision filter data for the fixtures this body has now, a fixture added later has the default filter, category 1 colliding with everything

Set whether the body can rotate

Sets the gravity scale

Sets the linear damping

Sets the linear velocity

Set the mass of the body

Set the mass data of the body, from a contact callback once the step is done; a mass of 0 or less becomes 1, use setBodyType for a static body; call it after adding fixtures and after setFixedRotation, both of which put the mass back to what the fixtures give

Set the moment of inertia of the body, about its center of mass

Sets the position, from a contact callback the body moves once the step is done, keeping the angle it has then

Set if this body is a sensor

Set whether the body is allowed to sleep

Sets the position and angle, from a contact callback the body moves once the step is done

Box2d objects updated with Box2d world step

Update the object transform, called automatically by engine even when paused; its body places it, so it can be a parent but not a child, connect it to another with a joint