Turbulence
Menu Path : Force > Turbulence
The Turbulence Block generates a noise field which it applies to the particle’s velocity. This Block is useful for adding natural-looking movement to particles. For more information on the types of noise, see the Value Curl, Perlin Curl, and Cellular Curl noise Operators.
Block compatibility
This Block is compatible with the following Contexts:
Block settings
| Setting | Type | Description |
|---|---|---|
| Mode | Enum | The mode this Block uses to apply the force to the particles. The options are: • Absolute: Applies the force to the particle as an absolute value. • Relative: Applies the force relative to the particle's velocity. |
| Noise Type | Enum | The type of noise this Block uses to generate the turbulence pattern. The options are: • Value: Uses Value Curl Noise to generate the turbulence. • Perlin: Uses Perlin Curl Noise to generate the turbulence. • Cellular: Uses Cellular Curl Noise to generate the turbulence. |
Block properties
| Input | Type | Description |
|---|---|---|
| Field Transform | Transform | The transform with which to position, rotate, or scale the turbulence field. |
| Intensity | Float | The intensity of the turbulence. Higher values result in an increased particle velocity. |
| Drag | Float | The drag coefficient. Higher drag leads to a stronger force influence over the particle velocity. This property only appears if you set Mode to Relative. |
| Frequency | Float | The period in which Unity samples the noise. A higher frequency results in more frequent noise change. |
| Octaves | Uint (Slider) | The number of layers of noise. More octaves create a more varied look but are also more resource-intensive to calculate. |
| Roughness | Float (Slider) | The scaling factor Unity applies to each octave. Unity only uses roughness when Octaves is set to a value higher than 1. |
| Lacunarity | Float | The rate of change of the frequency for each successive octave. A lacunarity value of 1 results in each octave having the same frequency. |