ColorByNeighbor.ino

/*
 * Color By Number/Neigbor
 * 
 * An example showing how to use the blinkstate library. 
 * 
 * Each Blink broadcasts 1 to its neighbors, letting its neigbors know it's present.
 * Each Blink displays a color based on the number of neighbors around it.
 * 
 */

#include "blinklib.h"
#include "blinkstate.h"

// color by number of neighbors
Color colors[] = {dim(WHITE,5),   // 0 neighbors
                  RED,            // 1 neighbors
                  YELLOW,         // 2 neighbors
                  GREEN,          // 3 neighbors
                  CYAN,           // 4 neighbors
                  BLUE,           // 5 neighbors
                  MAGENTA };      // 6 neighbors

void setup() {
  // put your setup code here, to run once:

  FOREACH_FACE(i) {
      // simple startup sequence with a ring of magenta
      setFaceColor( i , MAGENTA );
      delay(100);
      setFaceColor( i , OFF );
  }

  blinkStateBegin();  
  
  setState(1);
}


void loop() {

  // count neighbors
  int numNeighbors = 0;

  FOREACH_FACE(i) {
    numNeighbors+=getNeighborState(i);
  }

  // show color based on number of neighbors
  setColor( colors[ numNeighbors ] );
}