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voronoi.coffee
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voronoi.coffee
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boxWidth = 1
boxHeight = 1
siteRadius = 0.04
edgeWidth = 0.01 # also in voronoi.styl
if require?
voronoi = new (require 'voronoi')
else if Voronoi?
voronoi = new Voronoi
class VoronoiBox
maxGridLevel: 10
constructor: (@svg, @colorCells) ->
@sites = []
@voronoiEdges = null
@gridOn = true
@gridLevel = 2
@vcellGroup = @vedgeGroup = @gridGroup = @siteGroup = null
@width = boxWidth
@height = boxHeight
if @svg?
@bg = @svg.rect()
.addClass 'bg'
@vcellGroup = @svg.group()
.addClass 'vcell'
@gridGroup = @svg.group()
.addClass 'grid'
@outline = @svg.rect()
.addClass 'outline'
@vedgeGroup = @svg.group()
.addClass 'vedge'
@siteGroup = @svg.group()
.addClass 'sites'
@sizeChange()
@fromState: (state, svg, colorCells) ->
v = new @ svg, colorCells
v.loadState state
v
@fromFont: (options, svg) ->
v = new @ svg
for key, value of options
v[key] = value
v.gridChange()
v.gridDisplay()
## Deep copy to avoid aliasing, messing up original font, etc.
v.copy v
v
copy: (other) ->
## Clone sites so we can drag our sites without affecting other's.
@sites =
for site in other.sites
x: site.x
y: site.y
## Alias already computed Voronoi diagram to avoid recomputing it in copy.
@voronoiEdges = other.voronoiEdges
@voronoiCells = other.voronoiCells
## Draw but don't compute new Voronoi diagram.
@siteChange false
@drawVoronoi()
loadState: (search = location.search) ->
if getParameterByName 'grid', search
@gridLevel = parseInt getParameterByName 'grid', search
if @gridLevel > @maxGridLevel
@gridLevel = @maxGridLevel
@gridChange()
@gridOn = not getParameterByName 'off', search
@gridDisplay()
if pParam = getParameterByName 'p', search
@sites = for p in pParam.split ';'
[x, y] = p.split ','
x: parseFloat x
y: parseFloat y
if gParam = getParameterByName 'g', search
@glyphCells = for g in gParam
parseInt g, 10
@siteChange()
sizeChange: ->
for rect in [@bg, @outline]
rect.size @width, @height
@svg.viewbox
x: -edgeWidth/2
y: -edgeWidth/2
width: @width + edgeWidth
height: @height + edgeWidth
@gridChange()
gridChange: ->
return unless @gridGroup?
@gridGroup.clear()
n = 2 ** @gridLevel
for i in [1...n * @width]
x = i / n
@gridGroup.line x, 0, x, @height
for i in [1...n * @height]
y = i / n
@gridGroup.line 0, y, @width, y
removeDupSites: (trigger = true) ->
return ## not working yet...
close = siteRadius / 10
seen = {}
out = []
for site in @sites
if site in @dragSet
out.push site
else
name = Math.round(site.x / close) + ',' + Math.round(site.y / close)
#console.log name, name of seen
unless name of seen
out.push site
seen[name] = true
changed = @sites.length != out.length
@sites = out
@siteChange() if trigger and changed
siteChange: (compute = true) ->
@removeDupSites false
@drawSites()
@computeVoronoi() if compute
drawSites: ->
return unless @siteGroup?
@siteGroup.clear()
for site in @sites
site.circle = @siteGroup.circle siteRadius
.center site.x, site.y
@sites
hideSites: ->
return unless @siteGroup?
@siteGroup.hide()
setColorCells: (colorCells) ->
@colorCells = colorCells if colorCells?
delete @vcellColors # force cell colors to recompute
if not @colorCells? or @voronoiCells?
@drawVoronoi() # redraw using existing cells
else
@computeVoronoi() # compute cells and draw them
computeVoronoi: ->
voronoi.recycle @diagram if @diagram?
@diagram = voronoi.compute @sites,
xl: 0
xr: @width
yt: 0
yb: @height
@voronoiEdges =
for edge in @diagram.edges
continue if @lineOnEditBox edge.va, edge.vb #@onEditBox(edge.va) and @onEditBox(edge.vb)
edge.infinite = @onEditBox(edge.va) or @onEditBox(edge.vb)
delete edge.lSite
delete edge.rSite
edge
if @colorCells
## Reorder @voronoiCells to be in the same order as the sites.
siteIndex = new Map
for site, i in @sites
siteIndex.set site, i
@voronoiCells = Array @diagram.cells.length
for cell in @diagram.cells
unless siteIndex.has cell.site
throw new Error "Missing site for cell"
@voronoiCells[siteIndex.get cell.site] =
for halfedge, i in cell.halfedges
## Sadly, getStartpoint() seems to get the wrong order.
#halfedge.getStartpoint()
if i == 0
## Start with the vertex shared with the next edge
next = cell.halfedges[1].edge
if halfedge.edge.va in [next.va, next.vb]
last = halfedge.edge.va
else
last = halfedge.edge.vb
else
## Continue with the vertex not shared with the previous edge.
## Handle near-identical vertices in addition to identical.
if last == halfedge.edge.va
last = halfedge.edge.vb
else if last == halfedge.edge.vb
last = halfedge.edge.va
else
da = distanceSquared last, halfedge.edge.va
db = distanceSquared last, halfedge.edge.vb
if da < db
last = halfedge.edge.vb
else
last = halfedge.edge.va
@drawVoronoi()
drawVoronoi: ->
if @vcellGroup?
@vcellGroup.clear()
if @colorCells
@vcellColors ?= []
for cell, i in @voronoiCells
continue unless cell?.length
polygon = @vcellGroup.polygon ("#{v.x},#{v.y}" for v in cell).join ' '
.fill @vcellColors[i] ?= @colorCells @glyphCells?[i]
unless @draggable
do (i, polygon) =>
polygon.mousedown recolor = (e) =>
e.preventDefault()
polygon.fill @vcellColors[i] = @colorCells @glyphCells?[i]
.touchstart recolor
if @vedgeGroup?
@vedgeGroup.clear()
for edge in @voronoiEdges
line = @vedgeGroup.line edge.va.x, edge.va.y, edge.vb.x, edge.vb.y
line.addClass 'infinite' if edge.infinite
gridToggle: ->
@gridOn = not @gridOn
@gridDisplay()
gridDisplay: ->
return unless @gridGroup?
if @gridOn
@gridGroup.show()
document.getElementById('grid')?.value = 'Grid Off'
else
@gridGroup.hide()
document.getElementById('grid')?.value = 'Grid On'
outsideEditBox: (pt) ->
pt.x < 0 or pt.x > @width or pt.y < 0 or pt.y > @height
onEditBox: (pt) ->
(near(pt.x, 0) or near(pt.x, @width)) or (near(pt.y, 0) or near(pt.y, @height))
lineOnEditBox: (p, q) ->
(near(p.x, 0) and near(q.x, 0)) or
(near(p.x, @width) and near(q.x, @width)) or
(near(p.y, 0) and near(q.y, 0)) or
(near(p.y, @height) and near(q.y, @height))
class VoronoiEditor extends VoronoiBox
draggable: true
constructor: (...args) ->
super ...args
@dragPoint = null
@dragSet = []
@alone = false
@svg.mousedown (e) => @dragnew e
#@svg.touchstart (e) => @dragnew e
@svg.mouseup (e) => @dragstop e
@svg.on 'mouseleave', (e) => @dragstop e
@svg.touchend touchend = (e) =>
return unless @dragTouch?
e.preventDefault()
e.stopPropagation()
for touch in e.changedTouches
if touch.identifier == @dragTouch
@dragTouch = null
@dragstop touch
break
@svg.touchcancel touchend
@svg.mousemove (e) => @dragmove e
@svg.touchmove (e) =>
return unless @dragTouch?
e.preventDefault()
e.stopPropagation()
for touch in e.changedTouches
if touch.identifier == @dragTouch
@dragmove touch
break
#@svg.mouseout (e) =>
# console.log 'out'
# @dragging = null
@svg.on 'dragstart', (e) =>
e.preventDefault()
e.stopPropagation()
@svg.on 'selectstart', (e) =>
e.preventDefault()
e.stopPropagation()
#document.ontouchstart = (e) =>
# e.preventDefault()
# e.stopPropagation()
#document.ontouchmove = (e) =>
# e.preventDefault()
# e.stopPropagation()
drawSites: ->
sites = super()
return unless sites?
for site, i in sites
do (site, i) =>
site.circle
.mousedown (e) =>
e.preventDefault()
e.stopPropagation()
@dragclear()
if e.shiftKey
@dragSet.push site unless site in @dragSet
else if e.ctrlKey
if site in @dragSet
@dragSet.splice @dragSet.indexOf(site), 1
else
@dragSet.push site
else
## Without modifier, still want to drag the set.
@dragSet = [site] unless site in @dragSet
@dragstart e
.touchstart (e) =>
e.preventDefault()
e.stopPropagation()
@dragclear()
@dragTouch = e.changedTouches[0].identifier
@dragSet = [site]
@dragstart e.changedTouches[0]
#.mouseup (e) ->
# unless e.shiftKey or e.ctrlKey
# @dragSet = [site]
.on 'dblclick', =>
@glyphCells ?= (0 for [[email protected]])
@glyphCells[i] = 1 - (@glyphCells?[i] ? 0)
@vcellColors[i] = null
@saveState()
@drawVoronoi()
screen_pt: (e) ->
@svg.point e.clientX, e.clientY
dragclear: ->
@dragPoint = null
for site in @dragSet
site.circle?.removeClass 'select'
dragstart: (e) ->
@dragPoint = @screen_pt e
for site in @dragSet
site.circle?.addClass 'select'
site.startX = site.x
site.startY = site.y
dragnew: (e) ->
e.preventDefault()
e.stopPropagation()
return if @dragPoint?
point = @roundToGrid @screen_pt e
@sites.push point
@glyphCells?.push 0
@dragSet = [@sites[@sites.length-1]]
@dragstart e
@siteChange()
dragmove: (e) ->
e.preventDefault?()
e.stopPropagation?()
if @dragPoint?
point = @screen_pt e
for site in @dragSet
#site.x = point.x
#site.y = point.y
pos = @roundToGrid
x: site.startX + point.x - @dragPoint.x
y: site.startY + point.y - @dragPoint.y
site.x = pos.x
site.y = pos.y
site.circle.center site.x, site.y
if @outsideEditBox site
site.circle.addClass 'outside'
else
site.circle.removeClass 'outside'
@computeVoronoi()
dragstop: (e) ->
if @dragPoint?
for site in @dragSet
site.circle.removeClass 'drag'
## Drag outside box to delete a point.
for site in @dragSet
if e.type == 'mouseleave' or @outsideEditBox site
@sites.splice @sites.indexOf(site), 1
@dragSet.splice @dragSet.indexOf(site), 1
@siteChange()
@removeDupSites()
@dragPoint = null
@saveState()
e.preventDefault?()
e.stopPropagation?()
saveState: ->
return unless @alone
siteurl = ("#{site.x},#{site.y}" for site in @sites).join ';'
history.pushState null, 'voronoi',
"#{document.location.pathname}?p=#{siteurl}" +
(if @glyphCells? then "&g=#{@glyphCells.join ''}" else '') +
"&grid=#{@gridLevel}" +
if @gridOn then '' else '&off=1'
roundToGrid: (pt) ->
return pt unless @gridOn
n = 2 ** @gridLevel
x: (Math.round pt.x * n) / n
y: (Math.round pt.y * n) / n
gridLess: ->
if @gridLevel > 1
@gridLevel -= 1
@gridChange()
@saveState()
gridMore: ->
if @gridLevel < @maxGridLevel
@gridLevel += 1
@gridChange()
@saveState()
flipHorizontal: ->
@sites = for p in @sites
x: 1-p.x
y: p.y
@siteChange()
@saveState()
flipVertical: ->
@sites = for p in @sites
x: p.x
y: 1-p.y
@siteChange()
@saveState()
rotateLeft: ->
@sites = for p in @sites
x: p.y
y: -(p.x - 0.5) + 0.5
@siteChange()
@saveState()
rotateRight: ->
@sites = for p in @sites
x: -(p.y - 0.5) + 0.5
y: p.x
@siteChange()
@saveState()
shift: (dx, dy) -> =>
n = 2 ** @gridLevel
@sites = for p in @sites
x: Math.max 0, Math.min 1, p.x + dx / n
y: Math.max 0, Math.min 1, p.y + dy / n
@siteChange()
@saveState()
computeVoronoi: ->
super()
if @linked?
for link in @linked when link != @
link.copy @
## Based on jolly.exe's code from http://stackoverflow.com/questions/901115/how-can-i-get-query-string-values-in-javascript
getParameterByName = (name, search = location.search) ->
name = name.replace /[\[]/g, "\\["
.replace /[\]]/g, "\\]"
regex = new RegExp "[\\?&]#{name}=([^&#]*)"
results = regex.exec search
return null unless results?
decodeURIComponent results[1].replace /\+/g, " "
#bboxCorner = (pt) ->
# (pt.x == 0 or pt.x == boxWidth) and (pt.y == 0 or pt.y == boxHeight)
near = (a, b) ->
Math.abs(a - b) < 0.0000001
distanceSquared = (v1, v2) ->
dx = v1.x - v2.x
dy = v1.y - v2.y
dx * dx + dy * dy
## Based on meouw's answer on http://stackoverflow.com/questions/442404/retrieve-the-position-x-y-of-an-html-element
getOffset = (el) ->
x = y = 0
while el and not isNaN(el.offsetLeft) and not isNaN(el.offsetTop)
x += el.offsetLeft - el.scrollLeft
y += el.offsetTop - el.scrollTop
el = el.offsetParent
x: x
y: y
resize = (id) ->
offset = getOffset document.getElementById id
height = Math.max 100, window.innerHeight - offset.y
document.getElementById(id).style.height = "#{height}px"
editorGui = ->
#return unless document.getElementById 'voronoi'
editor = new VoronoiEditor SVG().addTo('#voronoi'),
(glyph) -> if glyph then 'pink' else 'none'
editor.alone = true
document.getElementById('grid').addEventListener 'click', -> editor.gridToggle()
document.getElementById('moreGrid').addEventListener 'click', -> editor.gridMore()
document.getElementById('lessGrid').addEventListener 'click', -> editor.gridLess()
document.getElementById('flipHorizontal').addEventListener 'click', -> editor.flipHorizontal()
document.getElementById('flipVertical').addEventListener 'click', -> editor.flipVertical()
document.getElementById('rotateLeft').addEventListener 'click', -> editor.rotateLeft()
document.getElementById('rotateRight').addEventListener 'click', -> editor.rotateRight()
document.getElementById('shiftLeft').addEventListener 'click', editor.shift -1,0
document.getElementById('shiftRight').addEventListener 'click', editor.shift +1,0
document.getElementById('shiftUp').addEventListener 'click', editor.shift 0,-1
document.getElementById('shiftDown').addEventListener 'click', editor.shift 0,+1
window.addEventListener 'popstate', -> editor.loadState()
editor.loadState()
window.addEventListener 'resize', -> resize 'voronoi'
resize 'voronoi'
showIt = ->
hide = getParameterByName 'hide', location.search
link = document.createElement 'a'
if hide
link.setAttribute 'href', '?'
link.innerText = '[show sites]'
else
link.setAttribute 'href', '?hide=1'
link.innerText = '[hide sites]'
document.getElementById 'voronoi'
.appendChild link
for line in @showMe.split '\n'
line = line.trim()
link = line.indexOf 'http://'
document.getElementById 'voronoi'
.appendChild(
if link < 0
h2 = document.createElement 'h2'
h2.innerHTML = line
h2
else
url = line[link..]
label = line[...link].trim()
box = document.createElement 'div'
box.className = 'box'
box.setAttribute 'title', label
v = VoronoiEditor.fromState url, SVG().addTo box
v.hideSites() if hide
box
)
## FONT GUI
sliders = {}
slidersInitial = # should match hidden input initial values in index.pug
hue: [0, 360]
saturation: [50, 100]
lightness: [25, 75]
Box = (state, svg) ->
if state.draggable
VoronoiEditor
else
VoronoiBox
colorBox = (state) ->
return unless state.color
(glyph) ->
subsliders = sliders[state.colorG and Boolean glyph]
hues = (parseFloat(x) for x in subsliders.hue.get())
saturations = (parseFloat(x) for x in subsliders.saturation.get())
lightnesses = (parseFloat(x) for x in subsliders.lightness.get())
"hsl(#{Math.random()*(hues[1]-hues[0])+hues[0]},#{Math.random()*(saturations[1]-saturations[0])+saturations[0]}%,#{Math.random()*(lightnesses[1]-lightnesses[0])+lightnesses[0]}%)"
if window?.fonts?
fontGridLevel = 0
for fontName, fontGlyphs of window.fonts
fontGridLevel = Math.max fontGridLevel,
...(fontGlyph.gridLevel for fontChar, fontGlyph of fontGlyphs)
if FontWebapp?
class FontWebappVoronoi extends FontWebapp
initDOM: ->
@svg = SVG().addTo @root
doRender: (state = @furls.getState()) ->
@svg.clear()
#@box?.destroy()
@box = new (Box state) @svg, colorBox state
@box.gridLevel = fontGridLevel
@box.glyphCells = [] if state.font == 'voronoi'
@renderedGlyphs = [@box]
y = 0
xmax = 0
for line, i in state.text.split '\n'
y += @options.lineKern ? 0 if i > 0
x = 0
dy = 0
for char, c in line
if char == ' ' and @options.spaceWidth?
x += @options.spaceWidth
else
x += @options.charKern unless c == 0 if @options.charKern?
if (glyph = @options.renderChar.call @, char, state, @box, x, y)?
x += glyph.width
else
console.warn "Unrecognized character '#{char}'"
continue
dy = Math.max dy, glyph.height
xmax = Math.max xmax, x
dy += @options.blankHeight ? 0 if line == ''
y += dy
@box.width = xmax
@box.height = y
@box.sizeChange()
@box.siteChange()
margin = @options.margin ? 0
@svg.viewbox
x: -margin
y: -margin
width: xmax + 2*margin
height: y + 2*margin
destroy: ->
super()
@svg.clear().remove()
downloadSVG: FontWebappSVG::downloadSVG
fontGui = ->
## Convert old URL format (pre-furls) to new format
search = window.location.search
search = search
.replace /inverseFont=1/g, 'font=inverse'
.replace /voronoiFont=1/g, 'font=voronoi'
.replace /sitesVoronoi=1/g, 'show=both'
.replace /sitesOnly=1/g, 'show=sites'
.replace /voronoiOnly=1/g, 'show=voronoi'
window.location.search = search unless window.location.search == search
## H/S/L sliders
sliderOptions =
connect: true
tooltips: true
orientation: 'vertical'
format:
from: Math.round
to: Math.round
sliderToHiddenInput = (g, hsl) -> hsl[0].toUpperCase() + if g then 'G' else ''
for f in [false, true]
sliders[f] = {}
for hsl in ['hue', 'saturation', 'lightness']
sliders[f][hsl] = slider =
noUiSlider.create document.getElementById(hsl + if f then 'F' else ''),
Object.assign {}, sliderOptions,
range:
min: 0
max: if hsl == 'hue' then 360 else 100
start: slidersInitial[hsl][..]
slider.on 'change', ->
state = app.furls.getState()
for g in [false, true]
for hsl in ['hue', 'saturation', 'lightness']
if (not g and state.color) or (g and state.colorG)
range = (parseFloat(x) for x in sliders[g][hsl].get()).join '-'
else
range = ''
app.furls.set sliderToHiddenInput(g, hsl), range
app.recolor()
app = null
launch = (changed) ->
return unless changed.one
state = furls.getState()
app?.destroy()
common =
furls: furls
root: '#output'
shouldRender: (changed) ->
changed.text or changed.font or changed.draggable
afterMaybeRender: (state, changed, rendered) ->
if (changed?.color or changed?.colorG) and not rendered
app.recolor?()
if state.one
app = new FontWebappVoronoi Object.assign common,
spaceWidth: boxWidth / 4
blankHeight: boxHeight / 4
renderChar: (char, state, box, x, y) ->
font = state.font
char = char.toUpperCase()
glyph = window.fonts[font][char]
return unless glyph?
for site, i in glyph.sites
box.sites.push
x: site.x + x
y: site.y + y
box.glyphCells?.push glyph.glyphCells?[i]
width: boxWidth
height: boxHeight
else
app = new FontWebappHTML Object.assign common,
sizeSlider: '#size'
charWidth: 200
charPadding: 0
lineKern: 32
spaceWidth: 50
renderChar: (char, state, parent) ->
font = state.font
char = char.toUpperCase()
glyph = window.fonts[font][char]
return unless glyph?
options = Object.assign colorCells: colorBox(state), glyph
Box(state).fromFont options, SVG().addTo parent
linkIdenticalChars: (glyphs) ->
glyph.linked = glyphs for glyph in glyphs
app.recolor = ->
colorCells = colorBox @furls.getState()
for glyph in @renderedGlyphs
glyph.setColorCells colorCells
furls = new Furls()
.addInputs()
## Custom decoder to synchronize hidden input values to sliders
for g in [false, true]
for hsl in ['hue', 'saturation', 'lightness']
slider = sliders[g][hsl]
furls.findInput sliderToHiddenInput g, hsl
.decode = do (slider) -> (value) ->
[min, max] = (parseFloat x for x in value.split '-')
slider.set [min, max]
value
furls
.syncState()
.syncClass()
.on 'stateChange', launch
launch one: true
document.getElementById('reset').addEventListener 'click', -> app.render()
document.querySelector('#downloadSVG button').addEventListener 'click', ->
copy = app.svg.clone()
copy.addTo 'body'
## Add CSS
copy.element 'style'
.words document.getElementById('svgStyle').innerHTML
## Remove groups set to display: none because of class options
## (which won't be in the SVG).
copy.find 'g'
.each (g) ->
g.remove() if window.getComputedStyle(g.node).display == 'none'
app.downloadSVG 'voronoi.svg', copy.svg()
copy.remove()
for font in ['voronoi', 'inverse']
document.getElementById("#{font}Links").innerHTML = (
for char in (key for key of window.fonts[font]).sort()
"""<A HREF="#{window.fonts[font][char].url}">#{char}</A>"""
).join ", "
## GUI MAIN
window?.onload = ->
if @showMe
showIt()
else if window.fonts
fontGui()
else if document.getElementById('voronoi')?
editorGui()
## FONT PRECOMPUTATION
main = ->
showMe = require('./allfont.coffee').showMe
fonts =
voronoi: {}
inverse: {}
currentFont = ''
for line in showMe.split '\n'
line = line.trim()
switch line
when 'FONT'
currentFont = 'voronoi'
when 'Backwards Voronoi'
currentFont = 'inverse'
else
link = line.indexOf 'http://'
continue if link < 0
url = line[link..]
label = line[...link].trim()
continue if label.length != 1 ## single character is final font
v = VoronoiBox.fromState url, undefined, true
fonts[currentFont][label] = glyph =
sites: v.sites[..]
voronoiEdges: v.voronoiEdges
voronoiCells: v.voronoiCells
glyphCells: v.glyphCells
gridLevel: v.gridLevel
url: url
delete glyph.glyphCells unless glyph.glyphCells?
fs = require 'fs'
stringify = require 'json-stringify-pretty-compact'
fs.writeFileSync 'font.js', """
window.fonts = #{stringify(fonts).replace /, "voronoiId": \d+/g, ''};
"""
main() if require? and require.main == module