LightSource that emits light in a single direction. More...

#include <DirectedLight.hpp>

Inheritance diagram for candle::DirectedLight:

Public Member Functions
void	castLight (const EdgeVector::iterator &begin, const EdgeVector::iterator &end) override
	Modify the polygon of the illuminated area with a raycasting algorithm. More...

void	setBeamWidth (float width)
	Set the width of the beam. More...

float	getBeamWidth () const
	Get the width of the beam. More...

Public Member Functions inherited from candle::LightSource
	LightSource ()
	Constructor.

void	setIntensity (float intensity)
	Set the light intensity. More...

float	getIntensity () const
	Get the intensity of the light. More...

void	setColor (const sf::Color &color)
	Set the light color. More...

sf::Color	getColor () const
	Get the plain color of the light. More...

virtual void	setFade (bool fade)
	Set the value of the fade flag. More...

virtual bool	getFade () const
	Check if the light fades or not. More...

void	setRange (float range)
	Set the range of the illuminated area. More...

float	getRange () const
	Get the range of the illuminated area. More...

virtual void	castLight (const EdgeVector::iterator &begin, const EdgeVector::iterator &end)=0
	Modify the polygon of the illuminated area with a raycasting algorithm. More...

Private Member Functions
void	draw (sf::RenderTarget &t, sf::RenderStates st) const override
	Draw the object to a target.

Detailed Description

LightSource that emits light in a single direction.

A DirectedLight is defined, mainly, by the direction of the rays, the position of the source, the beam width and the range of the light. You can manipulate the first two changing the rotation and position as you would with any sf::Transformable. The range can be manipulated as with other LightSources, with LightSource::setRange, and the beam width with setBeamWidth.

Variables diagram

Demo example

Member Function Documentation

◆ castLight()

void candle::DirectedLight::castLight	(	const EdgeVector::iterator &	begin,
		const EdgeVector::iterator &	end
	)

overridevirtual

Modify the polygon of the illuminated area with a raycasting algorithm.

The algorithm needs to know which edges to use to cast shadows. They are specified within a range of two iterators of a vector of edges of type sfu::Line.

Parameters

begin	Iterator to the first sfu::Line of the vector to take into account.
end	Iterator to the first sfu::Line of the vector not to be taken into account.