View difference between Paste ID: rPSv7Hek and TNCX7xSd

 
   // This example code is in the public domain.
 
   import processing.serial.*;
 
   float redValue = 0;        // red value
   float greenValue = 0;      // green value
   float blueValue = 0;       // blue value
   float alphaValue = 0;      // alpha value
 
   Serial myPort;
 
   void setup() {
     size(512, 512 );
 
     // List all the available serial ports
     // if using Processing 2.1 or later, use Serial.printArray()
     println(Serial.list());
 
     // I know that the first port in the serial list on my Mac is always my
     // Arduino, so I open Serial.list()[0].
     // Open whatever port is the one you're using.
     myPort = new Serial(this, Serial.list()[0], 9600);
     // don't generate a serialEvent() unless you get a newline character:
     myPort.bufferUntil('\n');
   }
 
   void draw() {
     // set the background color with the color values:
     background(redValue, greenValue, blueValue, alphaValue);
   }
 
   void serialEvent(Serial myPort) {
     // get the ASCII string:
     String inString = myPort.readStringUntil('\n');
 
     if (inString != null) {
       // trim off any whitespace:
       inString = trim(inString);
       // split the string on the commas and convert the resulting substrings
       // into an integer array:
       float[] colors = float(split(inString, ","));
       // if the array has at least three elements, you know you got the whole
       // thing.  Put the numbers in the color variables:
       if (colors.length >= 3) {
         // map them to the range 0-255:
         redValue = map(colors[0], 0, 1023, 0, 255);
         greenValue = map(colors[1], 0, 1023, 0, 255);
         blueValue = map(colors[2], 0, 1023, 0, 255);
         alphaValue = map(colors[3], 0, 1, 0, 255);
 
       }
     }
   }