diff src/samer/j3d/MatrixPoints4D.java @ 0:bf79fb79ee13

Initial Mercurial check in.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/samer/j3d/MatrixPoints4D.java	Tue Jan 17 17:50:20 2012 +0000
@@ -0,0 +1,80 @@
+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 MatrixPoints4D 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 MatrixPoints4D(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 color 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);
+	}
+}