Class HableCurve

An implementation of Hable's artist-friendly tonemapping curve. http://filmicworlds.com/blog/filmic-tonemapping-with-piecewise-power-curves/

Inheritance
object
HableCurve
Inherited Members
Namespace: UnityEngine.Rendering
Assembly: Unity.RenderPipelines.Core.Runtime.dll
Syntax
public class HableCurve

Constructors

HableCurve()

Creates a new curve.

Declaration
public HableCurve()

Fields

segments

The three segments of the curve.

Declaration
public readonly HableCurve.Segment[] segments
Field Value
Type Description
Segment[]

uniforms

An instance of the HableCurve.Uniforms utility class for this curve.

Declaration
public readonly HableCurve.Uniforms uniforms
Field Value
Type Description
HableCurve.Uniforms

Properties

inverseWhitePoint

The inverse of the white point.

Declaration
public float inverseWhitePoint { get; }
Property Value
Type Description
float
See Also

whitePoint

The white point.

Declaration
public float whitePoint { get; }
Property Value
Type Description
float

x0

The start of the linear section (middle segment of the curve).

Declaration
public float x0 { get; }
Property Value
Type Description
float

x1

The end of the linear section (middle segment of the curve).

Declaration
public float x1 { get; }
Property Value
Type Description
float

Methods

Eval(float)

Evaluates a point on the curve.

Declaration
public float Eval(float x)
Parameters
Type Name Description
float x

The x-coordinate at which to evaluate the curve.
Returns
Type Description
float

The y-coordinate (value) of the curve at the specified x-coordinate.

Init(float, float, float, float, float, float)

Initializes the curve.

Declaration
public void Init(float toeStrength, float toeLength, float shoulderStrength, float shoulderLength, float shoulderAngle, float gamma)
Parameters
Type Name Description
float toeStrength

The strength of the transition between the curve's toe and the curve's mid-section. A value of 0 results in no transition and a value of 1 results in a very hard transition.
float toeLength

The length of the curve's toe. Higher values result in longer toes and therefore contain more of the dynamic range.
float shoulderStrength

The strength of the transition between the curve's midsection and the curve's shoulder. A value of 0 results in no transition and a value of 1 results in a very hard transition.
float shoulderLength

The amount of f-stops to add to the dynamic range of the curve. This is how much of the highlights that the curve takes into account.
float shoulderAngle

How much overshoot to add to the curve's shoulder.
float gamma

A gamma correction to the entire curve.

Extension Methods