de.grogra.ray2.photonmap
Class PhotonMap

java.lang.Object
  de.grogra.ray2.photonmap.PhotonMap

public class PhotonMap
extends java.lang.Object

This class provides a photon map. The photon map uses a kd-tree data structure for fast access.

Author:

Ralf Kopsch

Constructor Summary

PhotonMap(double photonArea)
Creates a new Photon Map.

Method Summary

int	getEntryCount() Returns the number of photon map entries.
void	insertPhoton(Color3f col, Point3d pos, Vector3f dir) Inserts a new Photon into this map.
void	sumPhotons(Point3d point, Vector3f normal, Tuple3d color) Calculates the color for the given point.
float	traceRay(Intersection desc, Tuple3d color) This is only a debug function.

Methods inherited from class java.lang.Object

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

Constructor Detail

PhotonMap

public PhotonMap(double photonArea)

Creates a new Photon Map.

Parameters:

photonArea - the scanning area.

Method Detail

getEntryCount

public int getEntryCount()

Returns the number of photon map entries.

Returns:

Returns the number of photon map entries.

insertPhoton

public void insertPhoton(Color3f col,
                         Point3d pos,
                         Vector3f dir)

Inserts a new Photon into this map.

Parameters:

col - The Photon color.

pos - The Photon position.

dir - The Photon impact direction.

sumPhotons

public void sumPhotons(Point3d point,
                       Vector3f normal,
                       Tuple3d color)

Calculates the color for the given point.

Parameters:

point - the impact point.

normal - the impact normal vector.

color - output - the calculated color

traceRay

public float traceRay(Intersection desc,
                      Tuple3d color)

This is only a debug function. It direct visualise the photon map.

Parameters:

desc - the intersection description

color - output - the calculated color

Returns:

transparent value