UnityGame/Library/PackageCache/com.unity.shadergraph/Documentation~/Fade-Transition-Node.md

Fade Transition Node

Description

Fade Transition is a method of adding noise to add variation while a function transitions from on to off. This node takes in a fade value and remaps it using the noise value (usually from a texture). When FadeValue is 0, the output is always 0, and when FadeValue is 1, the output is always exactly 1. In between 0 and 1 the transition will follow the pattern in the noise.

This Node is commonly used as an input to Alpha on a Master Node to provide an LOD transition.

Ports

Name	Direction	Type	Binding	Description
Texture	Input	Texture 2D	None	Input value
Noise	Input	Float	None	The noise variation to apply to the fade function
FadeValue	Input	Float	None	The amount of transition to apply
FadeContrast	Input	Float	None	The contrast at which a single pixel goes from fully transparent to fully opaque. Higher values cause sharper edges in the transition
Fade	Output	Float	None	The resulting fade value

Generated Code Example

The following example code represents one possible outcome of this node.

float Unity_FadeTransitionNode_ApplyFade_float(float noise, float fadeValue, float fadeContrast)
{
    float ret = saturate(fadeValue*(fadeContrast+1)+(noise-1)*fadeContrast);
    return ret;
}

float Result = Unity_FadeTransitionNode_ApplyFade_float(
        _NoiseValue,
        _FadeValue,
        _FadeContrast);