The speed at which the scale changes over the lifetime of the cell. Animatable.
- iOS 5.0+
- macOS 10.6+
- Mac Catalyst 13.0+
- tvOS 9.0+
The speed change is defined as the rate of change per second.
The default value of this property is
Setting Emitter Cell Temporal Attributes
The lifetime of the cell, in seconds. Animatable.
The number of emitted objects created every second. Animatable.
The initial velocity of the cell. Animatable.
The amount by which the velocity of the cell can vary. Animatable.
The x component of an acceleration vector applied to cell.
The y component of an acceleration vector applied to cell.
The z component of an acceleration vector applied to cell.