Random Number

Menu Path : Operator > Random > Random Number

The Random Number Operator allows you to generate pseudo-random floating-point numbers within a particular range.

You can define the scope of the Operator to generate random values on a per-particle, per-particle strip, or per-component level. You can also make the random number constant based on a seed. In this case, each time the Operator generates a new number from a particular seed, the result is the same (even over frames) with respect to the scope. So two constant Random Number Operators with the same scope and seed generate the same random number.

Note that every random number this Operator generates also depends on the global seed in the Visual Effect component. Running the same effect with the same seed allows for deterministic behavior in random number generations.

Operator settings

Property	Type	Description
Seed	Enum	Defines the scope of the random number. The options are: •Per Particle: The Operator generates a different number every time. •Per Component: The Operator generates a random number every frame and uses it for every particle in the same component. •Per Particle Strip: The Operator generates the same number every time based on the value in the Seed input port. If you use this option, the Operator implicitly enables Constant and does not allow you to disable it.
Constant	boolean	Specifies whether the generated random number is constant or not. When enabled, the Operator generates the same number every time based on the Seed Operator property. This setting only appears if you set Seed to Per Particle or Per Component. If you set Seed to Per Particle Strip, the Operator implicitly enables this setting and does not allow you to disable it.

Operator properties

Input	Type	Description
Min	float	The minimum value of the generated random number
Max	float	The maximum value of the generated random number
Seed	uint	Specifies a seed that the Operator uses to generate random values. This property only appears is you enable Constant.

Output	Type	Description
r	float	The generated random number between Min and Max.