Instance Property

particleAngleVariation

The range, in degrees of randomized initial particle angles. Animatable.

Declaration

@property(nonatomic) CGFloat particleAngleVariation;

Discussion

Setting a nonzero value for this property randomizes the effect of the particleAngle property. SceneKit randomly adjusts the initial angle of each particle by up to half the particleAngleVariation value. For example, if the particleAngle value is 90.0 degrees and the particleAngleVariation value is 30.0 degrees, newly spawned particles are randomly rotated to an angle between 75° and 105°.

The default value is 0.0 degrees, specifying no randomization.

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

See Also

Managing Particle Motion

particleAngle

The rotation angle, in degrees, of newly spawned particles. Animatable.

particleVelocity

The initial speed, in units per second, for newly spawned particles. Animatable.

particleVelocityVariation

The range, in units per second, of randomized initial particle speeds. Animatable.

particleAngularVelocity

The initial spin rate, in degrees per second, of newly spawned particles. Animatable.

particleAngularVelocityVariation

The range, in degrees per second, of randomized initial angular velocities for particles. Animatable.

particleLifeSpan

The duration, in seconds, for which each particle is rendered before being removed from the scene. Animatable.

particleLifeSpanVariation

The range, in seconds, of randomized particle life spans. Animatable.