teaching machines

Progress in Twoville

October 17, 2019 by Chris Johnson. Filed under public, twoville.

Today was a non-teaching day, so I made some “progress” in Twoville:

  

    duration = 40
nsegments = 6

angle = 720 / nsegments
halfAngle = angle / 2

with viewport
  center = :zero2
  size = [20, ~]
  
with time
  start = 0
  stop = nsegments * duration
  
with path()
  stroke.color = :blue
  stroke.size = 1.5
  opacity = 0
  closed = false
  with jump()
    for i to nsegments
      i * duration -> t -> (i + 1) * duration
        position = [8, i * -halfAngle].toCartesian()
  with arc()
    for i to nsegments
      i * duration -> t
        degrees = halfAngle
      t -> (i + 1) * duration
        degrees = -halfAngle
      i * duration -> t -> (i + 1) * duration
        degrees.tween = :sineInOut
    center = :zero2

    
    
    
  
  
    

    duration = 40
nsegments = 6

angle = 720 / nsegments
halfAngle = angle / 2

with viewport
  center = :zero2
  size = [20, ~]
  
with time
  start = 0
  stop = nsegments * duration
  
with path()
  stroke.color = :blue
  stroke.size = 1.5
  opacity = 0
  closed = false
  with jump()
    for i to nsegments
      i * duration -> t -> (i + 1) * duration
        position = [8, i * -halfAngle].toCartesian()
  with arc()
    for i to nsegments
      i * duration -> t
        degrees = halfAngle
      t -> (i + 1) * duration
        degrees = -halfAngle
      i * duration -> t -> (i + 1) * duration
        degrees.tween = :sineInOut
    center = :zero2

  
  expand

You could summarize my professional career as one long effort to get to the point where I can express non-trivial ideas about shapes and animations in around 30 lines of code that doesn’t need to be compiled.