Mapper Class Reference

Predefined mapper types. More...

Public Types
enum	Type {   Linear ,   Exponential ,   QuinticRoot ,   QuarticRoot ,   CubeRoot ,   SquareRoot ,   Quadratic ,   Cubic ,   Quartic ,   Quintic }
	Mapper type. More...

Detailed Description

Predefined mapper types.

Mappers are named after the function mapping from the widget's normalized range to the parameter's natural range.

e.g.: an exponential mapper from [0;1] to [1;10000] would have the following correspondances:

mapping from widget's position to parameter values

position	parameter
0%	1.0
25%	10.0
50%	100.0
75%	1000.0
100%	10000.0

Example:

local knob = Knob{"ExpKnob", 100, 10, 1000, mapper = Mapper.Exponential}

Member Enumeration Documentation

Type

enum Mapper::Type

Mapper type.

Enumerator
Linear	Linear mapper: param = min + (max-min)*pos
Exponential	Exponential mapper, the parameter's range should be strictly positive. param = min * (max/min)^pos
QuinticRoot	QuinticRoot mapper: param = min + (max-min)*pos^(1/5)
QuarticRoot	QuarticRoot mapper: param = min + (max-min)*pos^(1/4)
CubeRoot	CubeRoot mapper: param = min + (max-min)*pos^(1/3)
SquareRoot	SquareRoot mapper: param = min + (max-min)*pos^(1/2)
Quadratic	Quadratic mapper: param = min + (max-min)*pos^2
Cubic	Cubic mapper: param = min + (max-min)*pos^3
Quartic	Quartic mapper: param = min + (max-min)*pos^4
Quintic	Quintic mapper: param = min + (max-min)*pos^5