Venetian

I'm familiar with Max and mxj development. I'm starting to work with Jitter and have a particular problem:

I've done a background removal and I want to try summing up different areas of the matrix but want that area to be user specified.

What's the best/most efficient way to work with the matrices from jitter in Java? Do people access them by making a JitterMatrix object - is it a good idea to turn this into an int array[] in Java?

Any code for basically taking a jitter input and making it into an array would be great. Also, advice on this - I realise that computationally it could be expensive.

jitter-in-mxj

As an update - here's the code. I get the dimensions 307200 (=240*320*4) for the return of copyMatrixToArray, but it doesn't seem to work right. If I try printing out a value of my new array, I always get -1. I've tried both int and float[] arrays.

public class jitter_sub extends MaxObject

    JitterMatrix output1 = new JitterMatrix();

    JitterMatrix output2 = new JitterMatrix();

    JitterMatrix start_output = new JitterMatrix();

    public float[] store_array = new float[307200];

        setInletAssist(0, "input (matrix)");

        setOutletAssist(0, "output (matrix)");

    public void jit_matrix(String mname)

        output1.frommatrix(mname);

post("Jitter matrix dim : rows "+my_dim[0]+" cols "+my_dim[1]);

//int[] copy_array = new int[my_dim[0] * my_dim[1] * planecount];

int copied_elts = output2.copyMatrixToArray(store_array);

post("elements "+copied_elts+" Array copied "+store_array[100]);

post("My cell "+my_cell[0]+"My cell1 "+my_cell[1]+"My cell2 "+my_cell[2]+"My cell3 "+my_cell[3]);

        outlet(0, "jit_matrix", output2.getName());

        outlet(0, "jit_matrix", output1.getName());

        outlet(1, "jit_matrix", start_output.getName());

import com.cycling74.max.*;
import com.cycling74.jitter.*;

public class jitter_sub extends MaxObject
{
	JitterMatrix output1 = new JitterMatrix();
	JitterMatrix output2 = new JitterMatrix();
	JitterMatrix start_output = new JitterMatrix();
private int planecount = 4;

	public float[] store_array = new float[307200];
private int index = 1;	

	public jitter_sub(float gain)
	{
		declareIO(1,2);
		setInletAssist(0, "input (matrix)");
		setOutletAssist(0, "output (matrix)");
	}

if (index == 1){
		output1.frommatrix(mname);

int[] my_dim = output2.getDim();
post("Jitter matrix dim : rows "+my_dim[0]+"  cols "+my_dim[1]);

int copied_elts = output2.copyMatrixToArray(store_array);
post("elements "+copied_elts+"  Array copied "+store_array[100]);

post("My cell "+my_cell[0]+"My cell1 "+my_cell[1]+"My cell2 "+my_cell[2]+"My cell3 "+my_cell[3]);
index = 2;

		outlet(0, "jit_matrix", output2.getName());

		outlet(0, "jit_matrix", output1.getName());
index = 1;

public void bang(){
start_output = output1;
post("Stored matrix");
		outlet(1, "jit_matrix", start_output.getName());
}

Jitter in mxj