How to pixelmap arbitrary lines?

[wizard]

You can write code in Pixelblaze’s pixel mapper, or use a static pixel map where each pixel’s coordinates are specified in arbitrary units.

For arbitrary lines, I would write/port a line generation function that draws pixels from a starting location given a director vector and count. Then you can call this function for each line segment and add them all up. Here’s an example for a “V”:

function (pixelCount) {

  function line(x, y, dx, dy, count) {
    var line = [];
    for (var i = 0; i < count; i++) {
      line.push([x + dx * i, y + dy * i]);
    }
    return line;
  }
  
  var map = [];
  map = map.concat(line(0,0, 1, 1, 9))
  map = map.concat(line(9,9, 1, -1, 10))
  
  return map;
}