git.r.bdr.sh - rbdr/tomato-sauce/blob - lib/screens/sprinkles.js

   1 'use strict';
   2
   3 // Places random sprinkles in the screen each frame. Same color per
   4 // frame.
   5 const Sprinkles = function (modulation, width, height, renderer) {
   6   let response = '';
   7
   8   let maxSprinkleCount = (width * height) / 2;
   9   let minSprinkleCount = (width * height) / 8;
  10   let sprinkleCount = Math.round(Math.random() * (maxSprinkleCount - minSprinkleCount)) + minSprinkleCount;
  11
  12   let red = Math.floor(Math.random() * 255);
  13   let blue = Math.floor(Math.random() * 255);
  14   let green = Math.floor(Math.random() * 255);
  15
  16   for (let i = 0; i < sprinkleCount; i++) {
  17     let x = Math.round(Math.random() * (width - 1)) + 1;
  18     let y = Math.round(Math.random() * (height - 1)) + 1;
  19
  20     let position = `\x1B[${y};${x}H`; // Move cursor to y,x (CSI y;x H)
  21
  22     response += `${position}${renderer(red, blue, green)} `;
  23   }
  24
  25   return response;
  26 };
  27
  28 module.exports = Sprinkles;