# Sandbox.ParticleFloat.ValueType

- Kind: enum
- Assembly: `Sandbox.Engine`
- Modifiers: sealed

## Fields

- [`Constant`](/api/Sandbox.ParticleFloat.ValueType/Constant): A value that doesn't change over time.
- [`Curve`](/api/Sandbox.ParticleFloat.ValueType/Curve): A curve that defines how the value changes over time or based on an evaluation factor.
- [`CurveRange`](/api/Sandbox.ParticleFloat.ValueType/CurveRange): Two curves where the value is interpolated between them.
- [`Range`](/api/Sandbox.ParticleFloat.ValueType/Range): The value is interpolated between two fixed floats.