|
|
# Sample Gradient Node
|
|
|
|
|
|
## Description
|
|
|
|
|
|
Samples a **Gradient** given the input of **Time**. Returns a **Vector 4** color value for use in the shader.
|
|
|
|
|
|
## Ports
|
|
|
|
|
|
| Name | Direction | Type | Binding | Description |
|
|
|
|:------------ |:-------------|:-----|:---|:---|
|
|
|
| Gradient | Input | Gradient | None | Gradient to sample |
|
|
|
| Time | Input | Float | None | Point at which to sample gradient (0.0–1.0) |
|
|
|
| Out | Output | Vector 4 | None | Output value as Vector4 |
|
|
|
|
|
|
## Generated Code Example
|
|
|
|
|
|
The following example code represents one possible outcome of this node.
|
|
|
|
|
|
```
|
|
|
void Unity_SampleGradient_float(float4 Gradient, float Time, out float4 Out)
|
|
|
{
|
|
|
float3 color = Gradient.colors[0].rgb;
|
|
|
[unroll]
|
|
|
for (int c = 1; c < 8; c++)
|
|
|
{
|
|
|
float colorPos = saturate((Time - Gradient.colors[c-1].w) / (Gradient.colors[c].w - Gradient.colors[c-1].w)) * step(c, Gradient.colorsLength-1);
|
|
|
color = lerp(color, Gradient.colors[c].rgb, lerp(colorPos, step(0.01, colorPos), Gradient.type));
|
|
|
}
|
|
|
#ifndef UNITY_COLORSPACE_GAMMA
|
|
|
color = SRGBToLinear(color);
|
|
|
#endif
|
|
|
float alpha = Gradient.alphas[0].x;
|
|
|
[unroll]
|
|
|
for (int a = 1; a < 8; a++)
|
|
|
{
|
|
|
float alphaPos = saturate((Time - Gradient.alphas[a-1].y) / (Gradient.alphas[a].y - Gradient.alphas[a-1].y)) * step(a, Gradient.alphasLength-1);
|
|
|
alpha = lerp(alpha, Gradient.alphas[a].x, lerp(alphaPos, step(0.01, alphaPos), Gradient.type));
|
|
|
}
|
|
|
Out = float4(color, alpha);
|
|
|
}
|
|
|
```
|