noise
Generates a random value using the Perlin-noise algorithm.
| ret noise(x) |
|---|
Parameters
| Item | Description |
|---|---|
| x |
[in] A floating-point vector from which to generate Perlin noise. |
Return Value
The Perlin noise value within a range between -1 and 1.
Remarks
Perlin noise values change smoothly from one point to another over a space, creating natural looking, randomly generated values. You can use Perlin noise to generate procedural textures for effects like smoke and fire.
Type Description
| Name | Template Type | Component Type | Size |
|---|---|---|---|
| x | vector | float | any |
| ret | scalar | float | 1 |
Minimum Shader Model
This function is supported in the following shader models.
| Shader Model | Supported |
|---|---|
| Shader Model 2 (DirectX HLSL) and higher shader models | no |
| Shader Model 1 (DirectX HLSL) | yes (tx_1_0 only) |