Instance Property

particleBounceVariation

The range of randomized restitution coefficients for particles. Animatable.

Declaration

@property(nonatomic) CGFloat particleBounceVariation;

Discussion

Setting a nonzero value for this property randomizes the effect of the particleBounce property. SceneKit randomly adjusts the restitution coefficient of each particle by up to half the particleBounceVariation value. For example, if the particleBounce value is 1.0 and the particleBounceVariation value is 0.5, each particle uses a random restitution coefficient between 0.75 and 1.25 for physics simulation.

The default value is 0.0, specifying no randomization.

You can animate changes to this property’s value. See Animating SceneKit Content.

See Also

Simulating Physics for Particles

affectedByGravity

A Boolean value that determines whether gravity, as defined by the scene’s physics simulation, affects the motion of particles.

affectedByPhysicsFields

A Boolean value that determines whether physics fields in the scene affect the motion of particles.

colliderNodes

The nodes whose geometry the system’s particles can collide with.

particleDiesOnCollision

A Boolean value that determines whether particles are removed from the scene upon colliding with another object.

acceleration

The constant acceleration vector, in units per second per second, applied to all particles in the system. Animatable.

dampingFactor

A factor that slows particles relative to their velocity. Animatable.

particleMass

The mass, in kilograms, of each particle in the system. Animatable.

particleMassVariation

The range, in kilograms, of randomized particle masses. Animatable.

particleCharge

The electric charge, in coulombs, of each particle in the system. Animatable.

particleChargeVariation

The range, in coulombs, of randomized particle charges. Animatable.

particleBounce

The restitution coefficient of each particle in the system. Animatable.

particleFriction

The friction coefficient of each particle in the system. Animatable.

particleFrictionVariation

The range of randomized friction coefficients for particles. Animatable.