Type Method

changeMass(by:duration:)

Creates an action that changes the mass of a node’s physics body by a relative value.

Declaration

class func changeMass(by v: Float, duration: TimeInterval) -> SKAction

Parameters

v

The amount to add to the physics body’s mass.

duration

The duration of the animation.

Return Value

A new action object.

Discussion

When the action executes, the physics body’s mass property animates from its current value to its new value.

This action is reversible; the reverse is created as if the following code is executed:

let action = SKAction.changeMass(by: -v, duration: sec)

See Also

Animating Properties of a Node's Physics Body

class func applyForce(CGVector, duration: TimeInterval) -> SKAction

Creates an action that applies a force to the center of gravity of a node’s physics body.

class func applyTorque(CGFloat, duration: TimeInterval) -> SKAction

Creates an action that applies a torque to a node’s physics body.

class func applyForce(CGVector, at: CGPoint, duration: TimeInterval) -> SKAction

Creates an action that applies a force to a specific point on a node’s physics body.

class func applyImpulse(CGVector, duration: TimeInterval) -> SKAction

Creates an action that applies an impulse to the center of gravity of a physics body.

class func applyAngularImpulse(CGFloat, duration: TimeInterval) -> SKAction

Creates an action that applies an angular impulse to a node’s physics body.

class func applyImpulse(CGVector, at: CGPoint, duration: TimeInterval) -> SKAction

Creates an action that applies an impulse to a specific point of a node’s physics body.

class func changeCharge(to: Float, duration: TimeInterval) -> SKAction

Creates an action that changes the charge of a node’s physics body to a new value.

class func changeCharge(by: Float, duration: TimeInterval) -> SKAction

Creates an action that changes the charge of a node’s physics body by a relative value.

class func changeMass(to: Float, duration: TimeInterval) -> SKAction

Creates an action that changes the mass of a node’s physics body to a new value.

class func strength(to: Float, duration: TimeInterval) -> SKAction

Creates an action that animates a change of a physics field’s strength.

class func strength(by: Float, duration: TimeInterval) -> SKAction

Creates an action that animates a change of a physics field’s strength to a value relative to the existing value.

class func falloff(to: Float, duration: TimeInterval) -> SKAction

Creates an action that animates a change of a physics field’s falloff.

class func falloff(by: Float, duration: TimeInterval) -> SKAction

Creates an action that animates a change of a physics field’s falloff to a value relative to the existing value.