BoatAttack/Packages/com.unity.shadergraph/Documentation~/Sample-Gradient-Node.md

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	Vector 1	None	Point at which to sample gradient
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);
}