SpotLight Class Reference

#include <spot.h>

Inheritance diagram for SpotLight:

List of all members.

Public Member Functions
	SpotLight (const Transform &light2world, const Spectrum &, float width, float fall)
Spectrum	Sample_L (const Point &p, float pEpsilon, const LightSample &ls, float time, Vector *wi, float *pdf, VisibilityTester *vis) const
bool	IsDeltaLight () const
float	Falloff (const Vector &w) const
Spectrum	Power (const Scene *) const
Spectrum	Sample_L (const Scene *scene, const LightSample &ls, float u1, float u2, float time, Ray *ray, Normal *Ns, float *pdf) const
float	Pdf (const Point &, const Vector &) const
Private Attributes
Point	lightPos
Spectrum	Intensity
float	cosTotalWidth
float	cosFalloffStart

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Detailed Description

Definition at line 37 of file spot.h.

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Constructor & Destructor Documentation

SpotLight::SpotLight	(	const Transform &	light2world,
		const Spectrum &	intensity,
		float	width,
		float	fall
	)

Definition at line 32 of file spot.cpp.

References cosFalloffStart, cosTotalWidth, Intensity, lightPos, Light::LightToWorld, and Radians().

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Member Function Documentation

float SpotLight::Falloff

(

const Vector &

w

)

const

Definition at line 52 of file spot.cpp.

References cosFalloffStart, cosTotalWidth, Normalize(), Light::WorldToLight, and Vector::z.

Referenced by Sample_L().

bool SpotLight::IsDeltaLight

(

)

const [inline, virtual]

Implements Light.

Definition at line 43 of file spot.h.

float SpotLight::Pdf	(	const Point &	,
		const Vector &
	)			const [virtual]

Implements Light.

Definition at line 93 of file spot.cpp.

Spectrum SpotLight::Power

(

const Scene *

)

const [virtual]

Implements Light.

Definition at line 64 of file spot.cpp.

References cosFalloffStart, cosTotalWidth, Intensity, and M_PI.

Spectrum SpotLight::Sample_L	(	const Scene *	scene,
		const LightSample &	ls,
		float	u1,
		float	u2,
		float	time,
		Ray *	ray,
		Normal *	Ns,
		float *	pdf
	)			const [virtual]

Implements Light.

Definition at line 98 of file spot.cpp.

References cosTotalWidth, Ray::d, Falloff(), INFINITY, Intensity, lightPos, Light::LightToWorld, UniformConePdf(), UniformSampleCone(), and LightSample::uPos.

Spectrum SpotLight::Sample_L	(	const Point &	p,
		float	pEpsilon,
		const LightSample &	ls,
		float	time,
		Vector *	wi,
		float *	pdf,
		VisibilityTester *	vis
	)			const [virtual]

Implements Light.

Definition at line 42 of file spot.cpp.

References DistanceSquared(), Falloff(), Intensity, lightPos, Normalize(), and VisibilityTester::SetSegment().

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Member Data Documentation

float SpotLight::cosFalloffStart [private]

Definition at line 53 of file spot.h.

Referenced by Falloff(), Power(), and SpotLight().

float SpotLight::cosTotalWidth [private]

Definition at line 53 of file spot.h.

Referenced by Falloff(), Power(), Sample_L(), and SpotLight().

Spectrum SpotLight::Intensity [private]

Definition at line 52 of file spot.h.

Referenced by Power(), Sample_L(), and SpotLight().

Point SpotLight::lightPos [private]

Definition at line 51 of file spot.h.

Referenced by Sample_L(), and SpotLight().

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The documentation for this class was generated from the following files:

• spot.h
• spot.cpp