samer@0: package	samer.j3d;
samer@0: 
samer@0: import samer.core.types.*;
samer@0: import samer.maths.*;
samer@0: import java.util.*;
samer@0: import java.awt.Color;
samer@0: import javax.media.j3d.*;
samer@0: import javax.vecmath.*;
samer@0: 
samer@0: 
samer@0: public class Points4D extends PointArray implements Observer
samer@0: {
samer@0: 	int			N;	// number of points
samer@0: 	Matrix		P;	// 3d positions of points
samer@0: 	VVector		A;	// scalar activations
samer@0: 	VDouble		K;  // scaling factor for activations
samer@0: 
samer@0: 	Color4f		carray[];
samer@0: 
samer@0: 	public Points4D(Matrix points, VVector activities)
samer@0: 	{
samer@0: 		super(points.getRowDimension(), COORDINATES | COLOR_4);
samer@0: 
samer@0: 		N=points.getRowDimension();
samer@0: 		P=points;
samer@0: 		A=activities;
samer@0: 		K=new VDouble("scale",1);
samer@0: 
samer@0: 		carray=new Color4f[N];
samer@0: 		for (int i=0; i<N; i++) carray[i]=new Color4f();
samer@0: 
samer@0: 		// set capabilities for subsequent updates
samer@0: 		setCapability(ALLOW_COORDINATE_WRITE);
samer@0: 		setCapability(ALLOW_COLOR_WRITE);
samer@0: 
samer@0: 		updatePoints();
samer@0: 		updateActivities();
samer@0: 
samer@0: 		A.addObserver(this);
samer@0: 		P.addObserver(new Observer () {
samer@0: 			public void update(Observable o, Object a) {
samer@0: 				updatePoints();
samer@0: 			}
samer@0: 		});
samer@0: 	}
samer@0: 
samer@0: 
samer@0: 	public void update(Observable o, Object a)
samer@0: 	{
samer@0: 		updateActivities();
samer@0: 	}
samer@0: 
samer@0: 	public void updatePoints()
samer@0: 	{
samer@0: 		// load points into point array
samer@0: 		double [][] PA=P.getArray();
samer@0: 		double []	row;
samer@0: 
samer@0: 		for (int i=0; i<N; i++) {
samer@0: 			row=PA[i];
samer@0: 			setCoordinate(i,row);
samer@0: 
samer@0: 			// choose hue according to 4th dimension
samer@0: 			carray[i].set(Color.getHSBColor((float)(row[3]*0.3)+0.16f,1f,1f));
samer@0: 		}
samer@0: 	}
samer@0: 
samer@0: 	public void updateActivities()
samer@0: 	{
samer@0: 		// load colours
samer@0: 		double []	a=A.array();
samer@0: 		double		k=K.value;
samer@0: 
samer@0: 		for (int i=0; i<N; i++) {
samer@0: 			float ai=(float)(a[i]*k);
samer@0: 			carray[i].w=ai;
samer@0: 		}
samer@0: 		setColors(0,carray);
samer@0: 	}
samer@0: }