test_remap.js

/*
test_remap.js
sample how to remap a pixel on a sequential 8x8 wired panel
*/

var np = {
  pin : D4,
  neopixels : 0,
  leds : [],
  pannelList : [],
  color : {r:0,g:0,b:0},
  x : 0,
  y : 0,
  setup : function(_x,_y,_pannelList){
    this.x = _x;
    this.y = _y;
    this.neopixels = _x *_y;
    this.pannelList = (_pannelList) ? _pannelList : [[0],[0]];  // single pannel
    this.leds = new Array(this.neopixels*3).fill(0);
    pinMode(this.pin, 'output');
    this.off();
  },

  off  : function(){
    this.leds.fill(0);
    this.flip();
  },

  flip : function(){
    //console.log('flip');
    x = require("neopixel").write(this.pin,this.leds);
  },

  remap : function(_x,_y) {
    return (this.pannelList[_x / 8 | 0][_y / 8 | 0] + _x + _y * 8 ) * 3;
  },

  setColor : function(_color){
    this.color.r = _color.r;
    this.color.g = _color.g;
    this.color.b = _color.b;
  },

  setPixel : function(_x,_y){
    o = this.remap(_x,_y);
    //console.log(_x,_y,o);
    this.leds[o] = this.color.g;
    this.leds[o+1] = this.color.r;
    this.leds[o+2] = this.color.b;
  },

  line : function(x1,y1,x2,y2) {
    var dx = Math.abs(x2 - x1),
        sx = x1 < x2 ? 1 : -1;
    var dy = -Math.abs(y2 - y1),
        sy = y1 < y2 ? 1 : -1;
    var err = dx + dy,
        e2; // error value e_xy

    while (1) {
        //print(x1,y1);
        this.setPixel(x1, y1);
        if (x1 == x2 && y1 == y2) break;
        e2 = 2 * err;
        if (e2 > dy) {
            err += dy;
            x1 += sx;
        } // e_xy+e_x > 0
        if (e2 < dx) {
            err += dx;
            y1 += sy;
        } // e_xy+e_y < 0
    }
  }
};

//--------------------------------------------------
// p1           : [[0],[0]]         x 0-7,  y 0-7
//--------------------------------------------------
// p1 + p2      : [[0],[56]]        x 0-15, y 0-7
//--------------------------------------------------
// p1 + p2 + p3 : [[0],[56],[112]]] x 0-23, y 0-7 
//--------------------------------------------------
// p1 + p2      : [[0,64],[56,120]] x 0-15, y 0-15
// p3 + p4


np.setColor({r:0,g:10,b:0});

/*
// p1
np.setup(8,8,[[0],[0]]);
np.setPixel(0,0);np.setPixel(1,0);
np.setPixel(6,7);np.setPixel(7,7);
*/

/*
// p1+p2
np.setup(8,16,[[0],[56]]);
np.setPixel(0,0);np.setPixel(1,0);
np.setPixel(6,7);np.setPixel(7,7);
np.setPixel(8,0);np.setPixel(9,0);
np.setPixel(14,7);np.setPixel(15,7);
*/

/*
// p1+p2+p3
np.setup(8,24,[[0],[56],[112]]);
//p1
np.setColor({r:10,g:0,b:0});
np.setPixel(0,0);np.setPixel(1,0);np.setPixel(0,1);
np.setPixel(7,7);np.setPixel(6,7);np.setPixel(7,6);
//p2
np.setColor({r:0,g:10,b:0});
np.setPixel(8,0);np.setPixel(9,0);np.setPixel(8,1);
np.setPixel(14,7);np.setPixel(15,7);np.setPixel(15,6);
//p3
np.setColor({r:0,g:0,b:10});
np.setPixel(16,0);np.setPixel(17,0);np.setPixel(16,1);
np.setPixel(22,7);np.setPixel(23,7);np.setPixel(23,6);
*/


// p1 + p2
// p3 + p4
np.setup(16,16,[[0,64],[56,120]]);
 //p1
np.setColor({r:10,g:0,b:0});
np.setPixel(0,0); np.setPixel(1,0); np.setPixel(0,1);
np.setPixel(7,7); np.setPixel(6,7); np.setPixel(7,6);
//p2
np.setColor({r:0,g:10,b:0});
np.setPixel(8,0);np.setPixel(9,0);np.setPixel(8,1);
np.setPixel(14,7);np.setPixel(15,7);np.setPixel(15,6);
//p3
np.setColor({r:0,g:0,b:10});
np.setPixel(0,8); np.setPixel(1,8); np.setPixel(0,9);
np.setPixel(6,15); np.setPixel(7,15); np.setPixel(7,14);
//p4
np.setColor({r:10,g:10,b:10});
np.setPixel(8,8); np.setPixel(9,8); np.setPixel(8,9);
np.setPixel(14,15); np.setPixel(15,15); np.setPixel(15,14);

np.flip();