Module raytracer

Package de.grogra.ray.physics

Class Spectrum3d

java.lang.Object

javax.vecmath.Tuple3d

de.grogra.ray.physics.Spectrum3d

All Implemented Interfaces:

Spectrum, DoubleToDouble, Serializable, Cloneable

Direct Known Subclasses:

Collector3d, CollectorW3d

public class Spectrum3d
extends Tuple3d
implements Spectrum

This class implements a spectrum which is represented by three double values which are interpreted as the red, green and blue part of the spectrum. Specta of this class are compatible with each other and with spectra of class Spectrum3f.

Author:

Ole Kniemeyer

See Also:

• Serialized Form

Field Summary

Fields inherited from class javax.vecmath.Tuple3d

x, y, z

Constructor Summary

Constructors

Constructor	Description
Spectrum3d()
Spectrum3d(double x, double y, double z)

Method Summary

Modifier and Type	Method	Description
void	add(Spectrum s)	Adds the function spec to this function.
void	clampMinZero()
Spectrum3d	clone()	Returns a clone of this spectrum.
void	div(Spectrum s)	Performs an componentwise division of this spectrum by spec.
void	div(Tuple3d t)	Performs a pointwise division of this spectrum by the given RGB spectum factor.
void	div(Tuple3f t)	Performs a pointwise division of this spectrum by the given RGB spectum factor.
void	dot(Spectrum s, Tuple3d out)	Computes the scalar product of this spectrum with spec, i.e., the integral of the pointwise product of both spectra over all frequencies.
double	evaluateDouble(double nu)	Evaluates the spectrum at frequency nu (measured in Hz).
void	get(Tuple3f out)	Computes the RGB spectrum color for this spectrum.
double	getMax()
double	integrate()	Returns the integral over all frequencies of this spectrum.
void	mul(Spectrum s)	Performs an componentwise multiplication of this spectrum by spec.
void	mul(Tuple3d t)	Performs a pointwise multiplication of this spectrum by the given RGB spectum factor.
void	mul(Tuple3f t)	Performs a pointwise multiplication of this spectrum by the given RGB spectum factor.
Spectrum3d	newInstance()	Returns a new instance of the class of this spectrum.
void	set(Spectrum s)	Sets this spectrum to spec.
void	setIdentity()	Sets this spectrum to the identity, i.e., its value is 1 everywhere.
void	setZero()	Sets this spectrum to the zero function.
void	sub(Spectrum s)	Subtracts the function spec from this function.
double	sum()	Computes the spectrum sum

Methods inherited from class javax.vecmath.Tuple3d

absolute, absolute, add, add, clamp, clamp, clamp, clamp, clampMax, clampMax, clampMax, clampMax, clampMin, clampMin, clampMin, clampMin, epsilonEquals, equals, equals, get, get, get, hashCode, interpolate, interpolate, interpolate, interpolate, max, min, negate, negate, scale, scale, scaleAdd, scaleAdd, set, set, set, set, sub, sub, toString

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface de.grogra.ray.physics.Spectrum

get, scale, set, set

Constructor Details

Spectrum3d

public Spectrum3d()

Spectrum3d

public Spectrum3d(double x,
 double y,
 double z)

Method Details

clampMinZero

public void clampMinZero()

Specified by:

clampMinZero in interface Spectrum

evaluateDouble

public double evaluateDouble(double nu)

Description copied from interface: Spectrum

Evaluates the spectrum at frequency nu (measured in Hz).

Specified by:

evaluateDouble in interface DoubleToDouble

Specified by:

evaluateDouble in interface Spectrum

Parameters:

nu - frequency in Hz

Returns:

function value at nu

setZero

public void setZero()

Description copied from interface: Spectrum

Sets this spectrum to the zero function.

Specified by:

setZero in interface Spectrum

setIdentity

public void setIdentity()

Description copied from interface: Spectrum

Sets this spectrum to the identity, i.e., its value is 1 everywhere.

Specified by:

setIdentity in interface Spectrum

clone

public Spectrum3d clone()

Description copied from interface: Spectrum

Returns a clone of this spectrum.

Specified by:

clone in interface Spectrum

Specified by:

clone in class Tuple3d

Returns:

clone of this spectrum

newInstance

public Spectrum3d newInstance()

Description copied from interface: Spectrum

Returns a new instance of the class of this spectrum. It is initialized to the zero function.

Specified by:

newInstance in interface Spectrum

Returns:

new instance of same class

add

public void add(Spectrum s)

Description copied from interface: Spectrum

Adds the function spec to this function. spec has to be compatible with this spectrum (usually this means that it has to be of the same class).

Specified by:

add in interface Spectrum

Parameters:

s - the spectrum to add

sub

public void sub(Spectrum s)

Description copied from interface: Spectrum

Subtracts the function spec from this function. spec has to be compatible with this spectrum (usually this means that it has to be of the same class).

Specified by:

sub in interface Spectrum

Parameters:

s - the spectrum to subtract

dot

public void dot(Spectrum s,
 Tuple3d out)

Description copied from interface: Spectrum

Computes the scalar product of this spectrum with spec, i.e., the integral of the pointwise product of both spectra over all frequencies. The integration is split into three parts: The first part ranges over the red part of the spectrum, its result is stored in out.x. The second part ranges over the green part of the spectrum and is stored in out.y, the third part ranges over the blue part and is stored in out.z.

Specified by:

dot in interface Spectrum

Parameters:

s - another spectrum

out - result of dot product, split into three integration domains

mul

public void mul(Spectrum s)

Description copied from interface: Spectrum

Performs an componentwise multiplication of this spectrum by spec. spec has to be compatible with this spectrum (usually this means that it has to be of the same class). The result of each component is stored in this spectrum.

Specified by:

mul in interface Spectrum

Parameters:

s - the spectrum to multiply with

mul

public void mul(Tuple3d t)

Description copied from interface: Spectrum

Performs a pointwise multiplication of this spectrum by the given RGB spectum factor.

Specified by:

mul in interface Spectrum

Parameters:

t - the multiplicator

mul

public void mul(Tuple3f t)

Description copied from interface: Spectrum

Performs a pointwise multiplication of this spectrum by the given RGB spectum factor.

Specified by:

mul in interface Spectrum

Parameters:

t - the multiplicator

div

public void div(Spectrum s)

Description copied from interface: Spectrum

Performs an componentwise division of this spectrum by spec. spec has to be compatible with this spectrum (usually this means that it has to be of the same class). The result of each component is stored in this spectrum. Note that a factor with 0 causes a ArithmeticException

Specified by:

div in interface Spectrum

Parameters:

s - the spectrum to divide with

div

public void div(Tuple3d t)

Description copied from interface: Spectrum

Performs a pointwise division of this spectrum by the given RGB spectum factor. Note that a factor with 0 causes a ArithmeticException

Specified by:

div in interface Spectrum

Parameters:

t - the divisor

div

public void div(Tuple3f t)

Description copied from interface: Spectrum

Performs a pointwise division of this spectrum by the given RGB spectum factor. Note that a factor with 0 causes a ArithmeticException

Specified by:

div in interface Spectrum

Parameters:

t - the divisor

get

public void get(Tuple3f out)

Description copied from interface: Spectrum

Computes the RGB spectrum color for this spectrum.

Specified by:

get in interface Spectrum

Parameters:

out - RGB spectrum will be placed in here

integrate

public double integrate()

Description copied from interface: Spectrum

Returns the integral over all frequencies of this spectrum.

Specified by:

integrate in interface Spectrum

Returns:

integrated spectrum over all frequencies

set

public void set(Spectrum s)

Description copied from interface: Spectrum

Sets this spectrum to spec. spec has to be compatible with this spectrum (usually this means that it has to be of the same class).

Specified by:

set in interface Spectrum

Parameters:

s - another spectrum

sum

public double sum()

Description copied from interface: Spectrum

Computes the spectrum sum

Specified by:

sum in interface Spectrum

getMax

public double getMax()

Specified by:

getMax in interface Spectrum