_CASoundPen.java_

/**
 * CASoundPen.java
 *
 * This class imitates a "virtual pen," to be controlled by OSC messages send
 * out from MaxMSP. The pen may apply varying pressure on its canvas (an
 * arbitrary Automaton).
 *
 * Parameters to be controlled:
 * X, Y position
 * pressure
 **/

import oscP5.*;
import netP5.*;
import java.awt.Point;
import java.awt.Dimension;

public class CASoundPen {

    // Private fields, controlling various aspects of how the pen draws
    private double penPressure;
    private int penX, penY;

    // Private constants, thresholds, etc.
    private static final double PRESSURE_THRESHOLD = 0.5; // How hard the pen
							  // must press in order
							  // to change a cell's
							  // state in the automaton.
    private Dimension cellSize; // Internal reference to how big cells are
				// within the automaton
    private static final int OSC_PORT_RCV = 8000; // What port we receive OSC
						  // packets on.
    
    /**
     * CONSTRUCTOR
     *
     * @param aut - Automaton on which this CASoundPen draws.
     **/
    public CASoundPen(Automata aut) {
	cellSize = aut.getCellSize();
    }

    public void setPenPosition(int x, int y) {
	penX = x;
	penY = y;
    }

    public void setPenPosition(Point p) {
	penX = (int)p.getX();
	penY = (int)p.getY();
    }

    public void setPenPressure(double pressure) {
	penPressure = pressure;
    }

    /**
     * applyPen()
     *
     * Applies current pen attributes in order to affect its automaton.
     **/
    public void applyPen() {
	if (penPressure >= PRESSURE_THRESHOLD) {
	    // Wrap around automaton boundaries
	    int cellX = ((penX % aut.getWidth()) / (double)aut.getWidth()) * cellSize.getWidth();
	    int cellY = ((penY % aut.getHeight()) / (double)aut.getHeight()) * cellSize.getHeight();

	    a.setCell(cellY, cellX, 1);
	}
    }

    /**
     * oscEvent(msg)
     *
     * This method is called when we have received an OscMessage on
     * OSC_PORT_RCV
     **/
    public void oscEvent(OscMessage msg) {
	System.out.println("OSC message received ====");
	System.out.print(msg.addrPattern()+"\t"+msg.typeTag()+"\n");
	System.out.println("=============================");
    }

}