This one was actually really fun to play around with once it was finished. I made this car/truck thing:  Quite a masterpiece, huh? Anyway, here is the code: ARDUINO CODE: const int pot1 = 5; const int pot2 = 4; void setup () { Serial.begin(9600); //begin serial communication at 9600 bps } void loop () { //print to serial port Serial.print(int(analogRead(pot1)*0.249)); Serial.print(','); Serial.println(int(analogRead(pot2)*0.249)); delay(20); } PROCESSING CODE: import processing.serial.*; Serial serPort; int[] dotOrigin; int[] previousDotOrigin; void setup () { // allocate arrays dotOrigin = new int[2]; previousDotOrigin = new int[2]; size(255, 255); //set size to 255 x 255 pixels, just for convenience background(255); //set background to white stroke(0); //set line color to black strokeWeight(3); //set line thickness to 3 pixels // set up serial buffer serPort = new Serial(this, Serial.list()[0], 9600); serPort.bufferUntil('\n'); } void draw () { //the if statement stops the random line jump at the beginning of the sketch if (previousDotOrigin[0] != 0 || previousDotOrigin[1] != 0) { //draw line from previous dot to current dot line(previousDotOrigin[0], previousDotOrigin[1], dotOrigin[0], dotOrigin[1]); } } void serialEvent(Serial serPort) { //store message from buffer in string String message = serPort.readStringUntil('\n'); if(message != null) { //remove whitespace and other nonsense message = trim(message); //set previous coordinates to those that are about to be changed previousDotOrigin = dotOrigin; //set dot coordinates to what's in the serial message dotOrigin = int(split(message, ',')); } } I had been just drawing a filled ellipse at the coords before but they were often broken up and disconnected, especially when moving quickly, so I switched to drawing a line from the previous coordinates. |