LissaDotBlast motion trail

_.md

[ Launch: LissaDotBlast ] 6387636 by zeffii
[ Launch: Lissajous ] 6381091 by zeffii
[ Launch: Lissajous ] 6378631 by slembcke

config.json

{"description":"LissaDotBlast motion trail","endpoint":"","display":"canvas","public":true,"require":[],"fileconfigs":{"inlet.js":{"default":true,"vim":false,"emacs":false,"fontSize":12},"_.md":{"default":true,"vim":false,"emacs":false,"fontSize":12},"config.json":{"default":true,"vim":false,"emacs":false,"fontSize":12},"inlet.coffee":{"default":true,"vim":false,"emacs":false,"fontSize":12},"style.css":{"default":true,"vim":false,"emacs":false,"fontSize":12}},"fullscreen":false,"play":true,"loop":false,"restart":false,"autoinit":true,"pause":true,"loop_type":"period","bv":false,"nclones":15,"clone_opacity":0.4,"duration":3000,"ease":"linear","dt":0.01,"thumbnail":"http://i.imgur.com/iQYREX3.png"}

inlet.coffee

# recreate 'spacedots' after http://beesandbombs.tumblr.com/page/2

circle = (x, y, r, col) ->
  ctx.beginPath()
  ctx.arc x, y, r, 0, 2.0 * Math.PI, false
  ctx.fillStyle = col.toString()
  ctx.fill()

get_points = (angle, amp) ->
  x: tributary.sw/2 + Math.cos(angle) * amp
  y: tributary.sh/2 + Math.sin(angle) * amp
  
ctx = tributary.ctx
ctx.fillStyle = "black"
# context.globalCompositeOperation = "xor"

num_balls = 17
ball_radius = 15
rotation_slice = 2*Math.PI / num_balls
speed = 10
alien_factor = 6

tributary.run = (unused, t) ->
  i = 0
  
  bg_col = 'rgba(6,6,8,0.3)'
  ctx.fillStyle = bg_col;
  ctx.fillRect(0,0,tributary.sw, tributary.sh);
  
  while i < num_balls

    slice_offset = alien_factor * Math.PI / num_balls
    amp = (Math.cos( speed*t + slice_offset*i) * 90) + 170
    pos = get_points(rotation_slice * i, amp)
    
    col = 'hsl(' + i*(360/num_balls) + ', 100%, 50%)'
    circle pos.x, pos.y, ball_radius, col
    i++

  

  

style.css

.cm-s-elegant.CodeMirror { background: #1e2426; color: #696969;  }
.cm-s-elegant div.CodeMirror-selected {background: #064968 !important;} /* 33322B*/
.cm-s-elegant span.cm-variable { color:#22EFFF; }
.cm-s-elegant span.cm-variable-2 { color: #FFCCB4; }
.cm-s-elegant span.cm-variable-3 { color: white; }
.cm-s-elegant span.cm-string { color: Chartreuse; }
.cm-s-elegant span.cm-string-2 {color: Chartreuse;}
.cm-s-elegant span.cm-def {color: #FFCCB4; opacity: 1.0}
.cm-s-elegant span.cm-bracket { color: #EBEFE7; }
.cm-s-elegant pre { color:#FFF; }
.cm-s-elegant span.cm-qualifier { color:#C0C0C0; }
.cm-s-elegant span.cm-comment { color: #AFB4B4;}
.cm-s-elegant span.cm-property {color: #FDA676;}
.cm-s-elegant span.cm-number { color: #FF92EE;}
.cm-s-elegant span.cm-keyword { color: #FFFF18; }
.cm-s-elegant .CodeMirror-cursor { border-left: 1px solid white !important; }
.cm-s-elegant .CodeMirror-gutters {background: #505050;}
.cm-s-elegant .CodeMirror-linenumber {color: #D3D3D3;}