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neopixel-8x8-textshift.js
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neopixel-8x8-textshift.js
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var pixel = require("node-pixel");
var five = require("johnny-five");
var board = new five.Board();
var strip = null;
var colorShift = 0;
board.on("ready", function() {
console.log("board.ready");
var led = new five.Led(10);
led.brightness(48);
var shift = 2; // how fast the colors rotate, 0-255
var fps = 1; // how often to refresh per second, ~300 is max
const NUM_ROWS = 8;
const NUM_COLS = 8;
strip = new pixel.Strip({
board: this,
controller: "FIRMATA",
strips: [ {pin: 6, length: NUM_ROWS*NUM_COLS}, ],
gamma: 2.2, // 3.6 = night, 2.6 = bright day
});
strip.on("ready", function() {
strip.off();
console.log("👍 strip.ready with " + strip.length + " LEDs");
loop(fps);
});
// setting this up so the syntax highlighter works to our advantage in the
// patterns below.
var X = true;
// Patterns are defined in rows of arrays. Each row can be as long as you
// want, but they should all be the same length.
var pattern1 = [
// HELLO, WORLD!!!
[0,0,0,0,0,0,0,X,X,0,0,X,X,0,0,X,X,X,X,X,0,0,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,X,X,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,0,X,X,X,X,X,X,0,0,X,X,X,X,0,0,0,0,X,X,0,0,0,0,X,X,X,0,0,0,0,X,X,X,0,0,X,X,X,0,0,X,X,X,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,X,X,0,0,X,X,0,0,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,0,0,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,0,X,X,0,0,X,X,0,0,X,X,0,0,X,0,0,0,X,X,0,0,0,0,X,X,0,X,0,0,0,X,X,X,0,0,X,X,X,0,0,X,X,X,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,X,X,0,0,X,X,0,0,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,0,0,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,0,X,X,0,0,X,X,0,0,X,X,0,0,X,0,0,0,X,X,0,0,0,0,X,X,0,0,X,0,0,X,X,X,0,0,X,X,X,0,0,X,X,X,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,X,X,0,0,X,X,0,0,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,0,0,X,X,0,0,0,0,0,0,X,X,0,0,0,X,X,0,0,X,X,0,0,X,X,0,0,X,X,X,X,0,0,0,0,X,X,0,0,0,0,X,X,0,0,X,0,0,X,X,X,0,0,X,X,X,0,0,X,X,X,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,X,X,X,X,X,X,0,0,X,X,X,X,X,0,0,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,0,0,X,X,0,0,0,0,0,0,X,X,0,0,0,X,X,0,0,X,X,0,0,X,X,0,0,X,X,0,X,0,0,0,0,X,X,0,0,0,0,X,X,0,0,X,0,0,0,X,0,0,0,0,X,0,0,0,0,X,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,X,X,0,0,X,X,0,0,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,0,0,X,X,0,X,X,0,0,0,X,X,0,X,0,X,X,0,0,X,X,0,0,X,X,0,0,X,X,0,0,X,0,0,0,X,X,0,0,0,0,X,X,0,0,X,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,X,X,0,0,X,X,0,0,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,0,0,X,X,0,X,X,0,0,0,0,X,X,X,X,X,0,0,0,X,X,0,0,X,X,0,0,X,X,0,0,X,0,0,0,X,X,0,0,0,0,X,X,0,X,0,0,0,0,X,0,0,0,0,X,0,0,0,0,X,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,X,X,0,0,X,X,0,0,X,X,X,X,X,0,0,X,X,X,X,X,0,0,X,X,X,X,X,0,0,X,X,X,X,X,X,0,0,X,0,0,0,0,X,X,0,X,X,0,0,0,X,X,X,X,X,X,0,0,X,X,0,0,X,0,0,0,X,X,X,X,0,0,X,X,X,0,0,0,0,X,X,X,0,0,X,X,X,0,0,X,X,X,0,0,0,0,0,0,0,0],
];
var pattern2 = [
// HEJ, VETFEST!!!
[0,0,0,0,0,0,0,X,X,0,0,X,X,0,0,X,X,X,X,X,X,0,0,X,X,X,X,X,X,X,0,0,0,0,X,X,0,0,0,0,0,X,X,0,X,X,X,X,X,X,0,X,X,X,X,X,X,X,X,0,X,X,X,X,X,0,X,X,X,X,X,X,0,0,X,X,X,X,0,0,X,X,X,X,X,X,X,X,0,0,X,X,X,0,0,X,X,X,0,0,X,X,X,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,X,X,0,0,X,X,0,0,X,X,X,X,X,X,0,0,X,X,X,X,X,X,X,0,0,0,0,X,X,0,0,0,0,0,X,X,0,X,X,X,X,X,X,0,X,X,X,X,X,X,X,X,0,X,X,X,X,X,0,X,X,X,X,X,X,0,X,X,X,X,X,X,0,X,X,X,X,X,X,X,X,0,0,X,X,X,0,0,X,X,X,0,0,X,X,X,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,X,X,0,0,X,X,0,0,X,X,0,0,0,0,0,0,0,0,0,X,X,0,0,0,0,0,0,0,X,X,0,0,0,X,X,0,0,X,X,0,0,0,0,0,0,0,0,X,X,0,0,0,0,X,X,0,0,0,0,X,X,0,0,0,0,0,X,X,0,0,0,X,0,0,0,0,X,X,0,0,0,0,0,X,X,X,0,0,X,X,X,0,0,X,X,X,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,X,X,X,X,X,X,0,0,X,X,X,X,0,0,0,0,0,0,0,X,X,0,0,0,0,0,0,0,X,X,0,0,0,X,X,0,0,X,X,X,X,0,0,0,0,0,0,X,X,0,0,0,0,X,X,X,X,0,0,X,X,X,X,0,0,0,X,X,X,X,0,0,0,0,0,0,X,X,0,0,0,0,0,X,X,X,0,0,X,X,X,0,0,X,X,X,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,X,X,X,X,X,X,0,0,X,X,X,X,0,0,0,0,0,0,0,X,X,0,0,0,0,0,0,0,0,X,X,0,X,X,0,0,0,X,X,X,X,0,0,0,0,0,0,X,X,0,0,0,0,X,X,X,X,0,0,X,X,X,X,0,0,0,0,X,X,X,X,0,0,0,0,0,X,X,0,0,0,0,0,0,X,0,0,0,0,X,0,0,0,0,X,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,X,X,0,0,X,X,0,0,X,X,0,0,0,0,0,0,X,0,0,X,X,0,0,X,X,0,0,0,0,X,X,0,X,X,0,0,0,X,X,0,0,0,0,0,0,0,0,X,X,0,0,0,0,X,X,0,0,0,0,X,X,0,0,0,0,0,X,0,0,0,X,X,0,0,0,0,X,X,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,X,X,0,0,X,X,0,0,X,X,X,X,X,X,0,0,X,X,X,X,X,0,0,X,X,0,0,0,0,0,X,X,X,0,0,0,0,X,X,X,X,X,X,0,0,0,0,X,X,0,0,0,0,X,X,0,0,0,0,X,X,X,X,X,X,0,X,X,X,X,X,X,0,0,0,0,X,X,0,0,0,0,0,0,X,0,0,0,0,X,0,0,0,0,X,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,X,X,0,0,X,X,0,0,X,X,X,X,X,X,0,0,0,X,X,X,0,0,0,0,X,0,0,0,0,0,X,X,X,0,0,0,0,X,X,X,X,X,X,0,0,0,0,X,X,0,0,0,0,X,X,0,0,0,0,X,X,X,X,X,X,0,0,X,X,X,X,0,0,0,0,0,X,X,0,0,0,0,0,X,X,X,0,0,X,X,X,0,0,X,X,X,0,0,0,0,0,0,0,0],
];
var pattern3 = [
// TESTING
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,X,X,X,0,X,X,X,0,0,X,X,0,X,X,X,0,X,0,X,0,0,X,0,X,X,X,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,X,0,0,X,0,0,0,X,0,0,0,0,X,0,0,X,0,X,X,0,X,0,X,0,0,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,X,0,0,X,X,0,0,0,0,X,0,0,X,0,0,X,0,X,0,X,X,0,X,0,X,0,0,0,0,0,0,0,0],
[0,0,0,0,0,0,0,0,0,X,0,0,X,X,X,0,X,X,X,0,0,X,0,0,X,0,X,0,0,X,0,X,X,X,0,0,0,0,0,0,0,0],
];
// choose from above
var pattern = pattern3;
// Set the display color by adjusting RGB values here. The highest value found
// in your `pattern` array informs you how high these numbers may be.
//
// use 100 as a high value
var color = {
red: 150,
green: 50,
blue: 25,
}
function loop(framerate) {
var loop = setInterval(function() {
// determine length of pattern
var messageLength = pattern[0].length;
// cycle through all patterns
for (var currentFrame = 0; currentFrame < messageLength - NUM_COLS; currentFrame++) {
for (var row = 0; row < pattern.length; row++) {
for (var col = currentFrame; col < currentFrame + NUM_COLS; col++) {
var thisPixel = (NUM_COLS*row) + col - currentFrame;
// COLOR: use "greyscale" values for one hue via `colors` object
// 'rgb(' + Math.round(pattern[row][col] * color.red) + ',' + Math.round(pattern[row][col] * color.green) + ',' + Math.round(pattern[row][col] * color.blue) + ')'
// COLOR: use color wheel
// colorWheel(thisPixel * (255/strip.length) + Math.round(colorShift))
// draw new pixel.
if (pattern[row][col]) {
strip.pixel(thisPixel).color(colorWheel(thisPixel * (255/strip.length) + Math.round(colorShift)));
} else {
strip.pixel(thisPixel).off();
}
}
// shift colors
colorShift += shift;
}
// update strip
strip.show();
}
}, 1000 / framerate);
}
// Input any value number greater than 0 to get a color value.
// The number is the absolute value of modulus of 255, and the
// colors progressively transition in a cycle: r => g => b => r
function colorWheel( WheelPos ){
var r,g,b;
WheelPos = (0 > WheelPos) ? -WheelPos : WheelPos;
WheelPos = 255 - (WheelPos % 255);
if ( WheelPos < 85 ) {
r = 255 - WheelPos * 3;
g = 0;
b = WheelPos * 3;
} else if (WheelPos < 170) {
WheelPos -= 85;
r = 0;
g = WheelPos * 3;
b = 255 - WheelPos * 3;
} else {
WheelPos -= 170;
r = WheelPos * 3;
g = 255 - WheelPos * 3;
b = 0;
}
// tone it down
r = Math.floor(r/2);
g = Math.floor(g/2);
b = Math.floor(b/2);
// returns a string with the rgb value to be used as the parameter
return "rgb(" + r +"," + g + "," + b + ")";
}
// go nuts!
this.repl.inject({
strip: strip,
led: led
});
// cleanup when this program is terminated
this.on("exit", function() {
led.off();
strip.off(); // doesn't work, not sure why
});
});