Module gpuFlux

Package de.grogra.gpuflux.imp3d.spectral

Class SpectralCurve

java.lang.Object

de.grogra.persistence.ShareableBase

de.grogra.gpuflux.imp3d.spectral.SpectralCurve

All Implemented Interfaces:

Manageable, Shareable

Direct Known Subclasses:

BlackbodySpectralCurve, ConstantSpectralCurve, IrregularSpectralCurve, RegularSpectralCurve, RGBSpectralCurve

public abstract class SpectralCurve
extends ShareableBase

This class is an abstract interface to sampled or analytic spectral data.

Field Summary

Fields

Modifier and Type	Field	Description
static final Node.NType	$TYPE

Constructor Summary

Constructors

Constructor	Description
SpectralCurve()

Method Summary

Modifier and Type	Method	Description
IrregularSpectralCurve	clip(float lambdaMin, float lambdaMax)	Returns a new IrregularSpectralCurve that represents this curve sampled at 1 nm steps over [lambdaMin, lambdaMax].
abstract float	sample(float lambda)	This function determines the actual spectral curve data.
final XYZColor	toXYZ()	Convert this curve to a tristimulus CIE XYZ color by integrating against the CIE color matching functions.
static final XYZColor	toXYZ(float lambda, float amplitude)

Methods inherited from class de.grogra.persistence.ShareableBase

addReference, appendReferencesTo, fieldModified, getProvider, getStamp, initProvider, manageableReadResolve, manageableWriteReplace, removeReference

Methods inherited from class java.lang.Object

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

Methods inherited from interface de.grogra.persistence.Manageable

getManageableType

Field Details

$TYPE

public static final Node.NType $TYPE

Constructor Details

SpectralCurve

public SpectralCurve()

Method Details

sample

public abstract float sample(float lambda)

This function determines the actual spectral curve data. Note that the lambda parameter is assumed to be in nanometers.

Parameters:

lambda - wavelength to sample in nanometers

Returns:

the value of the spectral curve at this point

toXYZ

public final XYZColor toXYZ()

Convert this curve to a tristimulus CIE XYZ color by integrating against the CIE color matching functions.

Returns:

XYZColor that represents this spectra

clip

public IrregularSpectralCurve clip(float lambdaMin,
 float lambdaMax)

Returns a new IrregularSpectralCurve that represents this curve sampled at 1 nm steps over [lambdaMin, lambdaMax]. This is the default implementation for analytically-defined subclasses (ConstantSpectralCurve, RGBSpectralCurve, etc.) that have no explicit wavelength table to clip.

IrregularSpectralCurve overrides this method with an exact tabular version that preserves original sample points.

Parameters:

lambdaMin - lower wavelength bound (nm), inclusive

lambdaMax - upper wavelength bound (nm), inclusive

Returns:

sampled spectral curve over the requested range

toXYZ

public static final XYZColor toXYZ(float lambda,
 float amplitude)