QuadAreaLight Class Reference

#include <QuadAreaLight.h>

Inheritance diagram for QuadAreaLight:

Detailed Description

Definition at line 8 of file QuadAreaLight.h.


Public Member Functions
	QuadAreaLight (ColorRGBA power, Vector3D pos, Vector3D d1, Vector3D d2)
unsigned int	GetNumberOfRays () const
	Return number of shadow rays handled by this light source.
void	SetNumberOfRays (unsigned int i)
	Set number of rays.
bool	Illuminate (Ray &ray, ColorRGBA &intensity, unsigned int index=0)
const Vector3D &	GetNormal () const
	Get normal of the quad representing the light source.
Private Attributes
ColorRGBA	power
Vector3D	p0
Vector3D	e1
Vector3D	e2
float	area
Vector3D	normal
unsigned int	raycount

Constructor & Destructor Documentation

QuadAreaLight::QuadAreaLight	(	ColorRGBA	power,
		Vector3D	pos,
		Vector3D	d1,
		Vector3D	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 25 of file QuadAreaLight.h.

References area, Cross(), e1, e2, Vector3D::Length(), normal, and Vector3D::Normalize().

Member Function Documentation

unsigned int QuadAreaLight::GetNumberOfRays ( ) const [inline, virtual]

Return number of shadow rays handled by this light source.

Reimplemented from Light.

Definition at line 39 of file QuadAreaLight.h.

References raycount.

void QuadAreaLight::SetNumberOfRays ( unsigned int i ) [inline]

Set number of rays.

Definition at line 42 of file QuadAreaLight.h.

References raycount.

Referenced by main().

bool QuadAreaLight::Illuminate	(	Ray &	ray,
		ColorRGBA &	intensity,
		unsigned int	index = `0`
	)			`[inline, virtual]`

Illuminate the pixel/ray. The illumination is done in the same as for a simple point light source, but now we place the point light source randomly on the quad surface. Also the area of the quad light source has to be taken into account, by computing the intensity

Implements Light.

Definition at line 51 of file QuadAreaLight.h.

References area, Ray::dir, Dot(), e1, e2, Epsilon, frand(), Ray::hit, Vector3D::Length(), normal, Vector3D::Normalize(), Ray::org, p0, power, and Ray::t.