Class c3dl.PositionalLight

Extends c3dl.Light.
A PositionalLight inherits from Light. Unlike DirectionalLight, a PositionalLight can have an attenuation factor.
Defined in: positionallight.js.

Class Summary
Constructor Attributes	Constructor Name and Description
	c3dl.PositionalLight()

Method Summary
Method Attributes	Method Name and Description
	getAttenuation() Get the attenuation factors of this light.
	getPosition() Get the position of the light.
	setAttenuation(attenuation) Set the attenuation factors of this light.
	setPosition(Position) Set the position of this light.

Methods borrowed from class c3dl.Light:: getAmbient, getDiffuse, getName, getSpecular, getType, isOn, setAmbient, setDiffuse, setName, setOn, setSpecular

Class Detail

c3dl.PositionalLight()

See:: c3dl.Light

Method Detail

{Array} getAttenuation()

Get the attenuation factors of this light. This is an array of three values which include constant attenuation, linear attenuation and quadratic attenuation.

Returns:: {Array} The attenuation factors

{Array} getPosition()

Get the position of the light.

Returns:: {Array} the position of the light.

setAttenuation(attenuation)

Set the attenuation factors of this light. the attenuation factor is calculated: attenuation factor = 1 / (C + L*D + Q*D^2)
C = constant attenuation, 0th element
L = linear attenuation, 1st element
Q = quadratic attenuation, 2nd element
D = distance between light and vertex.

Parameters:
{Array} attenuation

setPosition(Position)

Set the position of this light.

Parameters:
{Array} Position: of the light relative to world space.

Classes

Class c3dl.PositionalLight