SCRIPT-8

README.md

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

chains.json

{}

code.js

// title: quadratic bezier

const p0 = [1, 1]
const p2 = [126, 1]
const r = 62

initialState = {
  a: 0
}

update = state => {
  state.a -= 0.05
}

const bezier = (t, p0, p1, p2) =>
  (1 - t) ** 2 * p0 + 2 * (1 - t) * t * p1 + t * t * p2

const reproject = p => [p[0], 127 - p[1]]

draw = state => {
  clear()

  print(0, 0, 'this is a', 0)
  print(93, 0, 'quadratic', 0)
  print(0, 8, 'bezier', 0)
  print(109, 8, 'curve', 0)

  const { a } = state

  const z = [64 + r * Math.cos(a), 64 + r * Math.sin(a)]

  const points = range(0, 1.1, 0.05).map(t => [
    bezier(t, p0[0], z[0], p2[0]),
    bezier(t, p0[1], z[1], p2[1])
  ])

  line(...reproject(p0), ...reproject(z), 6)
  line(...reproject(p2), ...reproject(z), 6)
  circFill(...reproject(z), 2, 4)

  points.forEach((p, i) => {
    circFill(...reproject(p), 2, 0)
  })
}

phrases.json

{}

songs.json

{}

sprites.json

{}