view src/samer/j3d/Points4D.java @ 8:5e3cbbf173aa tip

Reorganise some more

package	samer.j3d;

import samer.core.types.*;
import samer.maths.*;
import java.util.*;
import java.awt.Color;
import javax.media.j3d.*;
import javax.vecmath.*;


public class Points4D extends PointArray implements Observer
{
	int			N;	// number of points
	Matrix		P;	// 3d positions of points
	VVector		A;	// scalar activations
	VDouble		K;  // scaling factor for activations

	Color4f		carray[];

	public Points4D(Matrix points, VVector activities)
	{
		super(points.getRowDimension(), COORDINATES | COLOR_4);

		N=points.getRowDimension();
		P=points;
		A=activities;
		K=new VDouble("scale",1);

		carray=new Color4f[N];
		for (int i=0; i<N; i++) carray[i]=new Color4f();

		// set capabilities for subsequent updates
		setCapability(ALLOW_COORDINATE_WRITE);
		setCapability(ALLOW_COLOR_WRITE);

		updatePoints();
		updateActivities();

		A.addObserver(this);
		P.addObserver(new Observer () {
			public void update(Observable o, Object a) {
				updatePoints();
			}
		});
	}


	public void update(Observable o, Object a)
	{
		updateActivities();
	}

	public void updatePoints()
	{
		// load points into point array
		double [][] PA=P.getArray();
		double []	row;

		for (int i=0; i<N; i++) {
			row=PA[i];
			setCoordinate(i,row);

			// choose hue according to 4th dimension
			carray[i].set(Color.getHSBColor((float)(row[3]*0.3)+0.16f,1f,1f));
		}
	}

	public void updateActivities()
	{
		// load colours
		double []	a=A.array();
		double		k=K.value;

		for (int i=0; i<N; i++) {
			float ai=(float)(a[i]*k);
			carray[i].w=ai;
		}
		setColors(0,carray);
	}
}