QuadAreaLight Class Reference

#include <QuadAreaLight.h>

Inherits Light.

Inheritance diagram for QuadAreaLight:

[legend]Collaboration diagram for QuadAreaLight:

[legend]List of all members.

Public Member Functions
	QuadAreaLight (const RGBAColor &power, const Vec3f &pos, const Vec3f &d1, const Vec3f &d2)
unsigned int	numberOfRays () const
void	setNumberOfRays (unsigned int i)
RGBAColor	illuminate (Vec3f &dir, const Vec3f &org, unsigned int) const
const Vec3f &	normal () const
Private Attributes
RGBAColor	mPower
	Light source power.
Vec3f	mP0
	Position.
Vec3f	mE1
	Span vector.
Vec3f	mE2
	Another span vector.
float	mArea
	Light area.
Vec3f	mNormal
	Normal vector of the surface.
unsigned int	mRaycount
	Number of rays needed to calculate the illuminance.

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Detailed Description

This class represents a quad area light source

Author:

Alex Busenius

Christian Engels

Definition at line 14 of file QuadAreaLight.h.

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Constructor & Destructor Documentation

QuadAreaLight::QuadAreaLight	(	const RGBAColor &	power,
		const Vec3f &	pos,
		const Vec3f &	d1,
		const Vec3f &	d2
	)			[inline]

Initialize quad area light.

Parameters:

	power	Intensity of the light source
	pos	Position of the light source
	d1,d2	Direction vectors spanning the quad polygon

Definition at line 23 of file QuadAreaLight.h.

References Vec3f::cross(), Vec3f::length(), mArea, mE1, mE2, mNormal, mPower, and Vec3f::normalize().

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Member Function Documentation

unsigned int QuadAreaLight::numberOfRays

(

)

const [inline, virtual]

Return number of shadow rays handled by this light source

Reimplemented from Light.

Definition at line 49 of file QuadAreaLight.h.

References mRaycount.

void QuadAreaLight::setNumberOfRays

(

unsigned int

i

)

[inline, virtual]

Set number of rays

Implements Light.

Definition at line 53 of file QuadAreaLight.h.

References mRaycount.

Referenced by QuadAreaLightFactory::create().

RGBAColor QuadAreaLight::illuminate	(	Vec3f &	dir,
		const Vec3f &	org,
		unsigned int
	)			const [inline, virtual]

Calculates the illuminance

Parameters:

	dir	This vector is initialized with the direction to the light source
	org	The point which should be illuminated
	index	The number of the shadowray ?

Returns:

Illuminance color, if the object is in the shadow we return black

Implements Light.

Definition at line 62 of file QuadAreaLight.h.

References Primitive::castShadows(), Scene::castShadows(), Vec3f::dot(), EPSILON, frand(), Ray::hit(), Ray::init(), Scene::intersect(), Vec3f::length(), mE1, mE2, mNormal, mP0, mPower, mRaycount, Light::mScene, Vec3f::normalize(), and Ray::t().

const Vec3f& QuadAreaLight::normal

(

)

const [inline]

Get normal of the quad representing the light source

Definition at line 94 of file QuadAreaLight.h.

References mNormal.

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Member Data Documentation

RGBAColor QuadAreaLight::mPower [private]

Light source power.

Definition at line 102 of file QuadAreaLight.h.

Referenced by illuminate(), and QuadAreaLight().

Vec3f QuadAreaLight::mP0 [private]

Position.

Definition at line 105 of file QuadAreaLight.h.

Referenced by illuminate().

Vec3f QuadAreaLight::mE1 [private]

Span vector.

Definition at line 108 of file QuadAreaLight.h.

Referenced by illuminate(), and QuadAreaLight().

Vec3f QuadAreaLight::mE2 [private]

Another span vector.

Definition at line 111 of file QuadAreaLight.h.

Referenced by illuminate(), and QuadAreaLight().

float QuadAreaLight::mArea [private]

Light area.

Definition at line 114 of file QuadAreaLight.h.

Referenced by QuadAreaLight().

Vec3f QuadAreaLight::mNormal [private]

Normal vector of the surface.

Definition at line 117 of file QuadAreaLight.h.

Referenced by illuminate(), normal(), and QuadAreaLight().

unsigned int QuadAreaLight::mRaycount [private]

Number of rays needed to calculate the illuminance.

Definition at line 120 of file QuadAreaLight.h.

Referenced by illuminate(), numberOfRays(), and setNumberOfRays().

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

• src/QuadAreaLight.h

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