SCRIPT-8

README.md

This is a SCRIPT-8 cassette. Click here to boot it.

chains.json

{}

code.js

const PointerAppearance = {
  cursor: {
    sprite: 127,
    offset: [1, 1]
  },
  crosshair: {
    sprite: 126,
    offset: [4, 4]
  }
}

const createPointer = (options = {}) => {
  const defaults = {
    position: [63, 63],
    speed: [0, 0],
    acceleration: 0.1,
    appearance: 'cursor',
    bounds: [0, 0, 127, 127]
  }
  return Object.assign({}, defaults, options)
}



init = state => {
  state.pointer = createPointer()
}

const updatePointer = (pointer, input) => {
  const moved = movePointer(pointer, input)
  if (moved) limitPointerToBounds(pointer)
}

const movePointer = (pointer, input) => {
  const previousPosition = [...pointer.position]
  pointer.speed = pointer.speed.map((v, i) => v * 0.9)
  if (input.left) pointer.speed[0] -= pointer.acceleration
  if (input.right) pointer.speed[0] += pointer.acceleration
  if (input.up) pointer.speed[1] -= pointer.acceleration
  if (input.down) pointer.speed[1] += pointer.acceleration
  if(Math.abs(pointer.speed[0]) < 0.1 && Math.abs(pointer.speed[1]) < 0.1) {
    return false
  }
  pointer.position = pointer.position.map((v, i) => v + pointer.speed[i])
  return true
}

const limitPointerToBounds = pointer => {
  pointer.position[0] = clamp(
    pointer.position[0],
    pointer.bounds[0],
    pointer.bounds[2]
  )
  pointer.position[1] = clamp(
    pointer.position[1],
    pointer.bounds[1],
    pointer.bounds[3]
  )
}

update = (state, input, elapsed) => {
  updatePointer(state.pointer, input)
}

const drawPointer = pointer => {
  const appearance = PointerAppearance[pointer.appearance]
  sprite(
    ...pointer.position.map((v, i) => v - appearance.offset[i]),
    appearance.sprite
  )
}

draw = state => {
  clear(4)
  drawPointer(state.pointer)
}

map.json

[]

misc.json

{
  "iframeVersion": "0.1.280",
  "lines": [
    77,
    0,
    0,
    0,
    0,
    0,
    0,
    0
  ]
}

phrases.json

{}

songs.json

{}

sprites.json

{
  "125": [
    "        ",
    "   000  ",
    "  00700 ",
    " 0007000",
    " 0007700",
    " 0000000",
    "  00000 ",
    "   000  "
  ],
  "126": [
    "        ",
    "    0   ",
    "    0   ",
    "        ",
    " 00 7 00",
    "        ",
    "    0   ",
    "    0   "
  ],
  "127": [
    "77      ",
    "707     ",
    "7007    ",
    "70007   ",
    "7007    ",
    "70707   ",
    "77 7    ",
    "        "
  ]
}