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 javax.media.j3d.*;
samer@0: import javax.vecmath.*;
samer@0: 
samer@0: 
samer@0: public class Points3DRef 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: 	GeometryUpdater	updater;
samer@0: 
samer@0: 	float		carray[];	// array for holding colours
samer@0: //	Color3f		carray[];
samer@0: 
samer@0: 	public Points3DRef(Matrix points, VVector activities)
samer@0: 	{
samer@0: 		super(points.getRowDimension(), BY_REFERENCE | COORDINATES | COLOR_3);
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 float[3*N];
samer@0: 
samer@0: 		// set capabilities for subsequent updates
samer@0: 		setCapability(ALLOW_REF_DATA_WRITE);
samer@0: 
samer@0: 		{
samer@0: 			double [] a=A.array();
samer@0: 			for (int i=0; i<N; i++) a[i]=1;
samer@0: 		}
samer@0: 
samer@0: 		updater = new GeometryUpdater() {
samer@0: 			public void updateData(Geometry g)
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, j=0; i<N; i++,j+=3) {
samer@0: 					float ai=(float)(a[i]*k);
samer@0: 					carray[j]=ai;
samer@0: 					carray[j+1]=0.8f*ai;
samer@0: 					carray[j+2]=0.4f*ai;
samer@0: 				}
samer@0: 			}
samer@0: 		};
samer@0: 
samer@0: 		updater.updateData(this);
samer@0: 
samer@0: 		setColorRefFloat(carray);
samer@0: 		setCoordRefDouble(P.getRowPackedCopy());
samer@0: 
samer@0: 		A.addObserver(this);
samer@0: /*
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: 
samer@0: 	public void update(Observable o, Object a) { updateData(updater); }
samer@0: }