com.threed.jpct

Class Light

java.lang.Object

com.threed.jpct.Light

public class Light
extends java.lang.Object

Field Summary

Fields

Modifier and Type	Field and Description
static boolean	LIGHT_INVISIBLE The light is not visible
static boolean	LIGHT_VISIBLE The light is visible

Constructor Summary

Constructors

Constructor and Description
Light(World world) Creates a new light in the world.

Method Summary

Modifier and Type	Method and Description
void	disable() Disables a light.
void	dispose() Disposes the light.
void	enable() Enables a light.
float	getAttenuation() Returns the light's attenuation.
float	getDiscardDistance() Gets the discard distance of this light, if it has be set before.
float	getDistanceOverride() Returns the overriden distance.
SimpleVector	getIntensity() Sets the light's intensity.
int	getLightId() Returns the light's internal ID.
SimpleVector	getPosition() Returns the position of this light in world space.
SimpleVector	getPosition(SimpleVector store) Returns the position of this light in world space.
boolean	isEnabled() Is the light enabled?
void	rotate(SimpleVector degrees, SimpleVector pivot) Rotates the light around a rotation pivot.
void	setAttenuation(float att) Sets the light's attenuation.
void	setDiscardDistance(float dist) Sets the light's discard distance.
void	setDistanceOverride(float distance) Overrides the distance that is usually calculated by taking the distance between the light source and an object.
void	setIntensity(float red, float green, float blue) Sets the light's intensity.
void	setIntensity(SimpleVector inty) Sets the light's intensity.
void	setPosition(SimpleVector pos) Sets the position of this light in world space.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

LIGHT_VISIBLE

public static final boolean LIGHT_VISIBLE

The light is visible

See Also:

Constant Field Values

LIGHT_INVISIBLE

public static final boolean LIGHT_INVISIBLE

The light is not visible

See Also:

Constant Field Values

Constructor Detail

Light

public Light(World world)

Creates a new light in the world. The light will be placed at (0,0,0) and with an intensity of (255,255,255).

Parameters:

world - the instance of world

Method Detail

enable

public void enable()

Enables a light. Each new light is enabled by default.

disable

public void disable()

Disables a light. The light is still part of the world, just not visible.

isEnabled

public boolean isEnabled()

Is the light enabled?

Returns:

boolean yes...or no?

dispose

public void dispose()

Disposes the light. It has no influence on the scene anymore after calling this method. This can't be undone.

getLightId

public int getLightId()

Returns the light's internal ID.

Returns:

setIntensity

public void setIntensity(SimpleVector inty)

Sets the light's intensity.

Parameters:

inty - a SimpleVector that contains the intensities of r,g,b in its x,y,z-components.

setIntensity

public void setIntensity(float red,
                         float green,
                         float blue)

Sets the light's intensity.

Parameters:

red - the red intensity

green - the green intensity

blue - the blue intensity

getIntensity

public SimpleVector getIntensity()

Sets the light's intensity.

Returns:

SimpleVector a SimpleVector that contains the intensities of r,g,b in its x,y,z-components.

setAttenuation

public void setAttenuation(float att)

Sets the light's attenuation.

Parameters:

att - the attenuation. The lower the value, the faster the light will fade. -1 means no fading at all.

getAttenuation

public float getAttenuation()

Returns the light's attenuation.

Returns:

the attenuation

setDiscardDistance

public void setDiscardDistance(float dist)

Sets the light's discard distance. This can help to improve performance if many light sources are being used. Default is -1.

Parameters:

dist - the discard distance, i.e. the distance where the light will be "cut off" at latest. -1 means never.

getDiscardDistance

public float getDiscardDistance()

Gets the discard distance of this light, if it has be set before. If it hasn't, the result of this call in undefined (but lower than -1).

Returns:

float the discard distance (if previously set, otherwise something below -1)

setDistanceOverride

public void setDistanceOverride(float distance)

Overrides the distance that is usually calculated by taking the distance between the light source and an object. With this, it's possible to let a light source have an effect on an object even if it's very far away and many other lights are actually closer.

Parameters:

distance - the new distance

getDistanceOverride

public float getDistanceOverride()

Returns the overriden distance. If none is set, -1 will be returned.

Returns:

the overriden distance or -1

setPosition

public void setPosition(SimpleVector pos)

Sets the position of this light in world space.

Parameters:

pos - the position

getPosition

public SimpleVector getPosition()

Returns the position of this light in world space.

Returns:

SimpleVector the position

getPosition

public SimpleVector getPosition(SimpleVector store)

Returns the position of this light in world space.

Parameters:

store - an optional SimpleVector (may be null), in which the position will be stored. If given, this is the vector that will be returned too.

Returns:

SimpleVector the position

rotate

public void rotate(SimpleVector degrees,
                   SimpleVector pivot)

Rotates the light around a rotation pivot. Unlike the similar methods in World, this doesn't cause the light to execute this rotation every frame (which was stupid idea anyway...:-)). This is done, when you are calling the method. Not more, not less.

Parameters:

degrees - a SimpleVector that contains the rotation angles in its x,y,z-components

pivot - SimpleVector the rotation pivot