twitch-plays-plotter/hpgl.js

const state = {
  position: {
    x: 0,
    y: 0
  }
}

function init(width = 4000, height = 4000) {
  return `IN;IP0,0,${width},${height};SC0,100,0,100;SP1;  `
}

function translate(x = 0, y = 0) {
  state.position.x += x;
  state.position.y += y;

  clampPosition();

  return `PR${state.position.x},${state.position.y};`
}

function to(x = 0, y = 0) {
  state.position.x = x;
  state.position.y = y;

  clampPosition();

  return `PA${state.position.x},${state.position.y};`
}

function circle(radius, resolution = 10) {
  return `CT${resolution};PA${state.position.x},${state.position.y};PD;CI${radius};PU;`
}

function clampPosition() {
  console.log(`clampPosition: ${state.position.x} ${state.position.y}`)
  if (state.position.x > 100) {
    console.log("in the borderland up");
    state.position.x = 100;
  } else if (state.position.x < 0) {
    console.log("in the borderland down");
    state.position.x = 0;
  }

  if (state.position.y > 100) {
    console.log("in the borderland up");
    state.position.y = 100;
  } else if (state.position.y < 0) {
    console.log("in the borderland down");
    state.position.y = 0;
  }
}

function rectangle(width, height) {
  if (!height) {
    height = width;
  }

  return `PD;FT1;RR${width},${height};`
}

function label(string) {
  return `DT$,0;SI0.5,0.8;LB${string}$;`;
}


module.exports = {
  init,
  translate,
  circle,
  rectangle,
  to,
  label
}