class Light

OpenGL light

Inheritance:

Public Methods

void	setLight (const GLfloat *ambient, const GLfloat *diffuse, const GLfloat *specular, const GLfloat *position, const GLfloat *direction = 0, GLfloat exponent = 0.0, GLfloat cutoff = 180.0, const GLfloat *attenuation = 0) set new light attributes
GLenum	getIndex (void) const returns OpenGL light index
bool	isActive (void) const returns light active flag
const GLfloat*	getAmbient (void) const returns light ambient coefficients
const GLfloat*	getDiffuse (void) const returns light diffuse coefficients
const GLfloat*	getSpecular (void) const returns light specular coefficients
const GLfloat*	getPosition (void) const returns light position
const GLfloat*	getDirection (void) const returns spotlight direction
GLfloat	getExponent (void) const returns spotlight expoenent
GLfloat	getCutoff (void) const returns spotlight cutoff (in degrees)
const GLfloat*	getAttenuation (void) const returns light attenuation factors (constant, linear and quadratic)
void	setAmbient (const GLfloat *ambient) set light ambient coefficients
void	setDiffuse (const GLfloat *diffuse) set light diffuse coefficients
void	setSpecular (const GLfloat *specular) set light specular coefficients
void	setPosition (const GLfloat *position) set light position coefficients
void	setDirection (const GLfloat *direction) set spotlight direction coefficients
void	setExponent (const GLfloat exponent) set spotlight exponent
void	setCutoff (const GLfloat cutoff) set spotlight cutoff
void	setAttenuation (const GLfloat *attenuation) set light attenuation coefficients
void	glSet (void) recomputes if needed and executes material display list
void	enable (void) enable (use) light
void	disable (void) disable light plane
void	displayFantom (bool disp) choose whether to display a graphical representation fo this spot light
void	putInCamera (void) set spot light in scene
CameraOGL*	getCamera () const returns the camera that is lit

Public

	constructors Light (CameraOGL *cam) default (white) light Light (CameraOGL *cam, const GLfloat *ambient, const GLfloat *diffuse, const GLfloat *specular, const GLfloat *position, const GLfloat *direction = 0, GLfloat exponent = 0.0, GLfloat cutoff = 180.0, const GLfloat *attenuation = 0) creates a new light
	destructor virtual ~Light () destroys display list

Protected Fields

LightFantom*	fantom light graphic primitive
CameraOGL*	camera camera owning this light
GLenum	index OpenGL light id
bool	active is light active
GLfloat	ambient [4] light ambient coefficients
GLfloat	diffuse [4] light diffuse coefficients
GLfloat	specular [4] light specular coefficients
GLfloat	position [4] light source position
GLfloat	direction [3] spot direction
GLfloat	exponent spotlight exponent
GLfloat	cutoff spotlight cutoff (in degrees)
GLfloat	attenuation [3] spotlight constant, linear and quardatic attenuation factors

LightFantom* fantom

light graphic primitive

CameraOGL* camera

camera owning this light

GLenum index

OpenGL light id

bool active

is light active

GLfloat ambient[4]

light ambient coefficients

GLfloat diffuse[4]

light diffuse coefficients

GLfloat specular[4]

light specular coefficients

GLfloat position[4]

light source position

GLfloat direction[3]

spot direction

GLfloat exponent

spotlight exponent

GLfloat cutoff

spotlight cutoff (in degrees)

GLfloat attenuation[3]

spotlight constant, linear and quardatic attenuation factors

constructors

Light(CameraOGL *cam)

default (white) light

Parameters:

cam - camera owning this light

Light(CameraOGL *cam, const GLfloat *ambient, const GLfloat *diffuse, const GLfloat *specular, const GLfloat *position, const GLfloat *direction = 0, GLfloat exponent = 0.0, GLfloat cutoff = 180.0, const GLfloat *attenuation = 0)

creates a new light

Parameters:

cam - camera owning this light
ambient - ambient light 4 coefficients
diffuse - diffuse light 4 coefficients
specular - specular light 4 coefficients
position - light position 4 coefficients
direction - spotlight direction 3 coefficients
exponent - spotlight exponent
cutoff - spotlight cutoff (in degrees)
attenuation - spotlight 3 attenuation factors

destructor

virtual ~Light()

destroys display list

void setLight(const GLfloat *ambient, const GLfloat *diffuse, const GLfloat *specular, const GLfloat *position, const GLfloat *direction = 0, GLfloat exponent = 0.0, GLfloat cutoff = 180.0, const GLfloat *attenuation = 0)

set new light attributes

Parameters:

ambient - ambient light 4 coefficients
diffuse - diffuse light 4 coefficients
specular - specular light 4 coefficients
position - light position 4 coefficients
direction - spotlight direction 3 coefficients
exponent - spotlight exponent
cutoff - spotlight cutoff (in degrees)
attenuation - spotlight 3 attenuation factors

GLenum getIndex(void) const

returns OpenGL light index

bool isActive(void) const

returns light active flag

const GLfloat* getAmbient(void) const

returns light ambient coefficients

const GLfloat* getDiffuse(void) const

returns light diffuse coefficients

const GLfloat* getSpecular(void) const

returns light specular coefficients

const GLfloat* getPosition(void) const

returns light position

const GLfloat* getDirection(void) const

returns spotlight direction

GLfloat getExponent(void) const

returns spotlight expoenent

GLfloat getCutoff(void) const

returns spotlight cutoff (in degrees)

const GLfloat* getAttenuation(void) const

returns light attenuation factors (constant, linear and quadratic)

void setAmbient(const GLfloat *ambient)

set light ambient coefficients

Parameters:

ambient - 4 coefficients array

void setDiffuse(const GLfloat *diffuse)

set light diffuse coefficients

Parameters:

diffuse - 4 coefficients array

void setSpecular(const GLfloat *specular)

set light specular coefficients

Parameters:

specular - 4 coefficients array

void setPosition(const GLfloat *position)

set light position coefficients

Parameters:

position - 4 coefficients array (light is at infinity if position[3] == 0.0)

void setDirection(const GLfloat *direction)

set spotlight direction coefficients

Parameters:

direction - 3 coefficients array

void setExponent(const GLfloat exponent)

set spotlight exponent

Parameters:

exponent - exponent value

void setCutoff(const GLfloat cutoff)

set spotlight cutoff

Parameters:

cutoff - cutoff value (in degrees)

void setAttenuation(const GLfloat *attenuation)

set light attenuation coefficients

Parameters:

attenuation - 3 coefficients (attenuation[0] = constant, attenuation[1] = linear and attenuation[2] = quadratic)

void glSet(void)

recomputes if needed and executes material display list

void enable(void)

enable (use) light

void disable(void)

disable light plane

void displayFantom(bool disp)

choose whether to display a graphical representation fo this spot light

Parameters:

disp - display fantom if disp == true

void putInCamera(void)

set spot light in scene

CameraOGL* getCamera() const

returns the camera that is lit

Direct child classes:

TclLight

alphabetic index hierarchy of classes

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