Package org.jzy3d.plot3d.primitives.axis.layout.providers

Class SpaceTransformedRegularTickProvider

java.lang.Object

org.jzy3d.plot3d.primitives.axis.layout.providers.AbstractTickProvider

org.jzy3d.plot3d.primitives.axis.layout.providers.RegularTickProvider

org.jzy3d.plot3d.primitives.axis.layout.providers.SpaceTransformedRegularTickProvider

All Implemented Interfaces:

ITickProvider

public class SpaceTransformedRegularTickProvider
extends RegularTickProvider

Build a sequence of regularly spaced ticks in case of space transformed charts (e.g. log charts).

Author:

martin

Field Summary

Fields inherited from class org.jzy3d.plot3d.primitives.axis.layout.providers.RegularTickProvider

steps

Constructor Summary

Constructors

Constructor	Description
SpaceTransformedRegularTickProvider()
SpaceTransformedRegularTickProvider(int steps)

Method Summary

Modifier and Type	Method	Description
double[]	generateTicks(double min, double max, int steps)	Able to generate ticks that will visually look equally spaced, despite an existing space transform in the chart.

Methods inherited from class org.jzy3d.plot3d.primitives.axis.layout.providers.RegularTickProvider

getSteps

Methods inherited from class org.jzy3d.plot3d.primitives.axis.layout.providers.AbstractTickProvider

generateTicks

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.jzy3d.plot3d.primitives.axis.layout.providers.ITickProvider

generateTicks

Constructor Details

SpaceTransformedRegularTickProvider

public SpaceTransformedRegularTickProvider()

SpaceTransformedRegularTickProvider

public SpaceTransformedRegularTickProvider(int steps)

Method Details

generateTicks

public double[] generateTicks(double min,
 double max,
 int steps)

Able to generate ticks that will visually look equally spaced, despite an existing space transform in the chart. The idea is that without knowing the space transform, neither the reverse of this function, we deduce it from the min-max range by computing the stepFactor that can be used to get the following tick sequence :

• Z0 = min
• Z1 = Z0 * stepFactor
• Z2 = Z1 * stepFactor
• Z3 = max

Solve factor equation below

• zmax / Math.pow(stepFactor, numberOfTicks) = zmin, equivalent to
• Math.pow(stepFactor, numberOfTicks) = zmax/zmin, equivalent to
• stepFactor = Math.pow(zmax/zmin, 1/steps)
• as Math.pow(x,n)=a is reversed by x=Math.pow(a,1/n)

Specified by:

generateTicks in interface ITickProvider

Overrides:

generateTicks in class RegularTickProvider