org.sunflow.core.light
Class PointLight
java.lang.Object
org.sunflow.core.light.PointLight
- LightSource, RenderObject
public class PointLight
extends java.lang.Object
int | getNumSamples() - Get the maximum number of samples that can be taken from this light
source.
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void | getPhoton(double randX1, double randY1, double randX2, double randY2, Point3 p, Vector3 dir, Color power) - Gets a photon to emit from this light source by setting each of the
arguments.
|
float | getPower() - Get the total power emitted by this light source.
|
void | getSamples(ShadingState state) - Samples the light source to compute direct illumination.
|
boolean | update(ParameterList pl, SunflowAPI api) - Update this object given a list of parameters.
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PointLight
public PointLight()
getNumSamples
public int getNumSamples()
Get the maximum number of samples that can be taken from this light
source. This is currently only used for statistics reporting.
- getNumSamples in interface LightSource
- maximum number of samples to be taken from this light source
getPhoton
public void getPhoton(double randX1,
double randY1,
double randX2,
double randY2,
Point3 p,
Vector3 dir,
Color power)
Gets a photon to emit from this light source by setting each of the
arguments. The two sampling parameters are points on the unit square that
can be used to sample a position and/or direction for the emitted photon.
- getPhoton in interface LightSource
randX1
- sampling parameterrandY1
- sampling parameterrandX2
- sampling parameterrandY2
- sampling parameterp
- position to shoot the photon fromdir
- direction to shoot the photon inpower
- power of the photon
getPower
public float getPower()
Get the total power emitted by this light source. Lights that have 0
power will not emit any photons.
- getPower in interface LightSource
getSamples
public void getSamples(ShadingState state)
Samples the light source to compute direct illumination. Light samples
can be created using the
LightSample
class and added to the
current
ShadingState
. This method is responsible for the
shooting of shadow rays which allows for non-physical lights that don't
cast shadows. It is recommended that only a single shadow ray be shot if
ShadingState.getDiffuseDepth()
is greater than 0. This avoids an
exponential number of shadow rays from being traced.
- getSamples in interface LightSource
state
- current state, including point to be shaded
update
public boolean update(ParameterList pl,
SunflowAPI api)
Update this object given a list of parameters. This method is guarenteed
to be called at least once on every object, but it should correctly
handle empty parameter lists. This means that the object should be in a
valid state from the time it is constructed. This method should also
return true or false depending on whether the update was succesfull or
not.
- update in interface RenderObject
pl
- list of parameters to read fromapi
- reference to the current scene
true
if the update is succesfull,
false
otherwise