almostIdentityFn

Threshold Field

Base Value Field

function

almostIdentityFn

RayTK

v0.42

A mapping function that can change a value only when it’s zero or very close to it, where it replaces the value with a small constant.

Then, rather than doing a conditional branch which introduces a discontinuity, you can smoothly blend your value with your Threshold.

This is based on Inigo Quilez’s article.

Parameters

Name	Description	Regular Handling	Read-Only Handling
Contexttype
Threshold	The value above which things will be unchanged.	Runtime	Baked
Base Value	The constant value to use when the input is zero.	Runtime	Baked

Inputs

• Threshold Field: (optional)
  • Coordinate Types: float
  • Context Types: Context MaterialContext CameraContext LightContext RayContext ParticleContext VertexContext PixelContext
  • Return Types: float
• Base Value Field: (optional)
  • Coordinate Types: float
  • Context Types: Context MaterialContext CameraContext LightContext RayContext ParticleContext VertexContext PixelContext
  • Return Types: float