Ray::Light Class Reference

#include <light.h>

Inheritance diagram for Ray::Light:

Public Member Functions
virtual	~Light (void)
virtual std::string	name (void) const =0
virtual Util::Point3D	getAmbient (Util::Ray3D ray, const class RayShapeIntersectionInfo &iInfo, const Material &material) const =0
virtual Util::Point3D	getDiffuse (Util::Ray3D ray, const class RayShapeIntersectionInfo &iInfo, const Material &material) const =0
virtual Util::Point3D	getSpecular (Util::Ray3D ray, const class RayShapeIntersectionInfo &iInfo, const Material &material) const =0
virtual bool	isInShadow (const class RayShapeIntersectionInfo &iInfo, const class Shape &shape, unsigned int tIdx) const =0
virtual Util::Point3D	transparency (const class RayShapeIntersectionInfo &iInfo, const class Shape &shape, Util::Point3D cLimit, unsigned int samples, unsigned int tIdx) const =0
virtual void	drawOpenGL (int index, GLSLProgram *glslProgram) const =0

Protected Attributes
Util::Point3D	_ambient
Util::Point3D	_diffuse
Util::Point3D	_specular

Private Member Functions
virtual void	_write (std::ostream &stream) const =0
virtual void	_read (std::istream &stream)=0

Detailed Description

This abstract class represents a light source in the scene.

Constructor & Destructor Documentation

~Light()

virtual Ray::Light::~Light ( void  )

inlinevirtual

The destructor

Member Function Documentation

_read()

virtual void Ray::Light::_read ( std::istream &  stream )

privatepure virtual

This method reads the Light from the stream (excluding the starting directive)

Implemented in Ray::DirectionalLight, Ray::PointLight, Ray::SphereLight, and Ray::SpotLight.

_write()

virtual void Ray::Light::_write ( std::ostream &  stream ) const

privatepure virtual

This method writes the Light into the stream (including the starting directive)

Implemented in Ray::DirectionalLight, Ray::PointLight, Ray::SphereLight, and Ray::SpotLight.

drawOpenGL()

virtual void Ray::Light::drawOpenGL ( int  index, GLSLProgram *  glslProgram  ) const

pure virtual

This method calls the necessary OpenGL commands to render the light. The index argument specifices the index of the light that is to be drawn.

Implemented in Ray::DirectionalLight, Ray::PointLight, and Ray::SpotLight.

getAmbient()

virtual Util::Point3D Ray::Light::getAmbient ( Util::Ray3D  ray, const class RayShapeIntersectionInfo &  iInfo, const Material &  material  ) const

pure virtual

This method returns the ambient contribution of the light source to the specified hit location.

Implemented in Ray::DirectionalLight, Ray::PointLight, and Ray::SpotLight.

getDiffuse()

virtual Util::Point3D Ray::Light::getDiffuse ( Util::Ray3D  ray, const class RayShapeIntersectionInfo &  iInfo, const Material &  material  ) const

pure virtual

This method returns the diffuse contribution of the light source to the specified hit location.

Implemented in Ray::DirectionalLight, Ray::PointLight, and Ray::SpotLight.

getSpecular()

virtual Util::Point3D Ray::Light::getSpecular ( Util::Ray3D  ray, const class RayShapeIntersectionInfo &  iInfo, const Material &  material  ) const

pure virtual

This method returns the specular contribution of the light source to the specified hit location.

Implemented in Ray::DirectionalLight, Ray::PointLight, and Ray::SpotLight.

isInShadow()

virtual bool Ray::Light::isInShadow ( const class RayShapeIntersectionInfo &  iInfo, const class Shape &  shape, unsigned int  tIdx  ) const

pure virtual

This method tests if the intersection point represented by iInfo is in shadow from the light source. The returned value is either 0 if the the intersection point is not in shadow or 1 if it is.

Implemented in Ray::DirectionalLight, and Ray::PointLight.

name()

virtual std::string Ray::Light::name ( void  ) const

pure virtual

This method returns the name of the shape

Implemented in Ray::DirectionalLight, Ray::PointLight, Ray::SphereLight, and Ray::SpotLight.

transparency()

virtual Util::Point3D Ray::Light::transparency ( const class RayShapeIntersectionInfo &  iInfo, const class Shape &  shape, Util::Point3D  cLimit, unsigned int  samples, unsigned int  tIdx  ) const

pure virtual

This method tests if the intersection point represented by iInfo is in partial shadow from the light source. A ray is cast from the hit location to the light source, and the transparency values are accumulated. If the light source is an area light source, multiple rays area cast to (uniformly randomly chosen positions on the area light sources and the transparency is set to the average of the transparency values over the samples. If the transparency value falls below cLimit, the testing terminates.

Implemented in Ray::DirectionalLight, Ray::PointLight, Ray::SphereLight, and Ray::SpotLight.

Member Data Documentation

_ambient

Util::Point3D Ray::Light::_ambient

protected

The ambient color of the light source

_diffuse

Util::Point3D Ray::Light::_diffuse

protected

The diffuse color of the light source

_specular

Util::Point3D Ray::Light::_specular

protected

The specular color of the light source

---

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

• Assignments/Ray/light.h