Physical pixel

// Physical pixel

// mouseover serial

// Demonstrates how to send data to the Arduino I/O board, in order to
// turn ON a light if the mouse is over a square and turn it off
// if the mouse is not.

// created 2003-4
// based on examples by Casey Reas and Hernando Barragan
// modified 30 Aug 2011
// by Tom Igoe
// This example code is in the public domain.

import processing.serial.*;

float boxX;
float boxY;
int boxSize = 20;
boolean mouseOverBox = false;

Serial port;

void setup() {
size(200, 200);
boxX = width/2.0;
boxY = height/2.0;

// List all the available serial ports in the output pane.
// You will need to choose the port that the Arduino board is
// connected to from this list. The first port in the list is
// port #0 and the third port in the list is port #2.

// Open the port that the Arduino board is connected to (in this case #0)
// Make sure to open the port at the same speed Arduino is using (9600bps)
port = new Serial(this, Serial.list()[0], 9600);


void draw()

// Test if the cursor is over the box
if (mouseX > boxX-boxSize && mouseX < boxX+boxSize &&
mouseY > boxY-boxSize && mouseY < boxY+boxSize) {
mouseOverBox = true;
// draw a line around the box and change its color:
// send an ‘H’ to indicate mouse is over square:
else {
// return the box to it’s inactive state:
// send an ‘L’ to turn the LED off:
mouseOverBox = false;

// Draw the box
rect(boxX, boxY, boxSize, boxSize);

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