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= (options) ->\n  map = options.map\n  bbox = map.db.bbox\n  map.debug.coordinates = false\n\n  canvas = {}\n\n  extent = {\n    w: d3.max([-bbox[0], bbox[2]]) * 2\n    h: d3.max([-bbox[1], bbox[3]]) * 2\n  }\n\n  proj = map.proj = proj4(map.db.projParams)\n  map.wgsProjection = (p) -> [x, y] = proj.forward(p); return [+x, +y]\n\n  projection = map.projection = ([x, y]) -> [\n    (x - bbox[0]) * map.sc + map.tr[0]\n    (bbox[3] - y) * map.sc + map.tr[1]\n  ]\n\n  projection.invert = ([px, py]) -> [\n    bbox[0] + (px - map.tr[0]) / map.sc\n    bbox[3] - (py - map.tr[1]) / map.sc\n  ]\n\n  projection.stream = (s) -> {\n    point: (x, y, z) -> [px, py] = projection([x, y]); s.point(px, py, z)\n    sphere: -> s.sphere()\n    lineStart: -> s.lineStart()\n    lineEnd: -> s.lineEnd()\n    polygonStart: -> s.polygonStart()\n    polygonEnd: -> s.polygonEnd()\n    valid: true\n  }\n\n  zoom = d3.behavior.zoom()\n\n  simplify = d3.geo.transform(\n    point: (x, y, z) ->\n      if z? and z >= 300 / map.sc\n        return @stream.point(x, y)\n  )\n\n  clip = d3.geo.clipExtent()\n\n  map.path = d3.geo.path()\n      .projection(stream: (s) -> simplify.stream(clip.stream(projection.stream(s))))\n\n  mapLayer = d3.select('body').append('svg').attr('class', 'mapLayer')\n  canvas.actionbar = d3.select('body').append('svg')\n      .attr('class', 'actionbar')\n      .attr('height', app.ACTIONBAR_HEIGHT)\n\n  app.symbol.defs(mapLayer.append('defs'))\n\n  canvas.land = mapLayer.append('g')\n  canvas.contours = mapLayer.append('g')\n  canvas.features = mapLayer.append('g')\n  canvas.symbols = mapLayer.append('g')\n  canvas.locationg = mapLayer.append('g').attr('class', 'location')\n\n  d3.select('body').call(zoom)\n  document.querySelector('svg.mapLayer').addEventListener('touchstart', (e) -> e.preventDefault())\n\n  resize = ->\n    if map.sc?\n      oldCenter = [map.width / 2, map.height / 2]\n\n    map.width = parseInt(d3.select('body').style('width'))\n    map.height = parseInt(d3.select('body').style('height'))\n    minScale = d3.min([map.width / extent.w, map.height / extent.h])\n\n    if map.sc?\n      sc = map.sc\n      tr = map.tr\n      center = projection.invert(oldCenter)\n\n    else\n      sc = minScale\n      tr = [0, 0]\n      center = [0, 0]\n\n    updateProjection(sc, tr)\n    zoom.scaleExtent([minScale, 3])\n\n    map.centerAt(center, map.sc)\n    resetMap()\n\n  updateProjection = (new_sc, new_tr) ->\n    map.sc = new_sc\n    map.tr = new_tr\n\n    [x0, y0] = projection.invert([0, map.height])\n    [x1, y1] = projection.invert([map.width, 0])\n    clip.extent([\n      [d3.max([x0, bbox[0]]), d3.max([y0, bbox[1]])]\n      [d3.min([x1, bbox[2]]), d3.min([y1, bbox[3]])]\n    ])\n\n  resetMap = ->\n    transformMap((map.scBase = map.sc), (map.trBase = map.tr))\n\n  transformMap = (scZoom, trZoom) ->\n    scDelta = scZoom / map.scBase\n    trDelta = [\n      trZoom[0] - map.trBase[0] * scDelta + (scDelta - 1) * map.width / 2\n      trZoom[1] - map.trBase[1] * scDelta + (scDelta - 1) * map.height / 2\n    ]\n    transform = \"translate3d(#{trDelta[0]}px,#{trDelta[1]}px,0px)\n                 scale(#{scDelta})\"\n    style = \"-webkit-transform: #{transform};\n                     transform: #{transform}\"\n\n    mapLayer.attr('style', style)\n\n    if map.debug.coordinates\n      mapLayer.on 'mousemove', ->\n        console.log(proj.inverse(projection.invert([d3.event.x, d3.event.y])))\n    else\n      mapLayer.on 'mousemove', ->\n\n  map.centerAt = (pos, new_sc) ->\n    updateProjection(new_sc, [0, 0])\n    xy = projection(pos)\n    new_tr = [map.width / 2 - xy[0], map.height / 2 - xy[1]]\n    zoom.scale(new_sc).translate(new_tr)\n    updateProjection(new_sc, new_tr)\n    map.dispatch.redraw()\n\n  zoom.on 'zoom', ->\n    map.zooming = true\n    updateProjection(d3.event.scale, d3.event.translate)\n    transformMap(d3.event.scale, d3.event.translate)\n    map.dispatch.zoom()\n\n  zoom.on 'zoomend', ->\n    map.zooming = false\n    resetMap()\n    map.dispatch.zoomend()\n\n  d3.select(window).on('resize.canvas', resize)\n  map.dispatch.on('ready.canvas', resize)\n\n  return canvas\n","app.dem = (options) ->\n  map = options.map\n  contours = options.contours\n\n  contourLayer = topojson.feature(map.db.dem, map.db.dem.objects.contour).features\n\n  contours.selectAll('.contour')\n      .data(contourLayer)\n    .enter().append('path')\n      .attr('class', 'contour')\n      .classed('contour-minor', (d) -> d.properties.elevation % 300)\n      .attr('id', (d) -> \"contour-#{d.id}\")\n\n  renderContours = ->\n    contours.selectAll('.contour')\n        .attr('d', map.path)\n\n    contours.selectAll('.contour-label').remove()\n\n    for ring in contourLayer\n      continue if ring.properties.elevation % 300\n      contours.append('text')\n          .attr('class', 'contour-label')\n          .append('textPath')\n            .attr('xlink:href', \"#contour-#{ring.id}\")\n            .attr('startOffset', \"50%\")\n            .text(ring.properties.elevation)\n\n  map.dispatch.on('redraw.contours', renderContours)\n  map.dispatch.on('zoomend.contours', renderContours)\n","app.features = (options) ->\n  map = options.map\n  db = map.db\n  map.debug.collisions = false\n\n  land = options.landG.append('g')\n  lakes = options.featuresG.append('g')\n  rivers = options.featuresG.append('g')\n  highways = options.featuresG.append('g')\n  segments = options.featuresG.append('g')\n  symbols = options.symbols\n\n  lakesLayer = topojson.feature(db.topo, db.topo.objects.lakes).features\n  segmentLayer = topojson.feature(db.topo, db.topo.objects.segments).features\n  segmentMap = app.index(segmentLayer)\n  for s in segmentLayer\n    s.properties.length = app.length(s.geometry.coordinates, true)\n\n  poiLayer = topojson.feature(db.topo, db.topo.objects.poi).features\n  riversLayer = topojson.feature(db.topo, db.topo.objects.rivers).features\n  highwaysLayer = topojson.feature(db.topo, db.topo.objects.highways).features\n\n  landLayer = topojson.feature(db.land, db.land.objects.land).features\n\n  for route in db.routes\n    for id in route.segments\n      if route.symbol?\n        segment = segmentMap.get(id)\n        segment.properties.symbols = [] unless segment.properties.symbols?\n        segment.properties.symbols.push(route.symbol)\n\n  labelWidthG = symbols.append('g')\n      .attr('class', 'symbolLabel')\n      .attr('tarnsform', 'translate(0,-100)')\n  app.symbol.calculateLabelWidth(labelWidthG, poiLayer)\n  labelWidthG.remove()\n\n  land.selectAll('.landPoly')\n      .data(landLayer)\n    .enter().append('path')\n      .attr('class', (d) -> \"landPoly land-#{d.properties.type}\")\n      .attr('id', (d) -> d.id)\n\n  segments.selectAll('.segment')\n      .data(segmentLayer)\n    .enter().append('path')\n      .attr('class', 'segment')\n      .attr('id', (d) -> d.id)\n\n  lakes.selectAll('.lake')\n      .data(lakesLayer)\n    .enter().append('path')\n      .attr('class', 'lake')\n      .attr('id', (d) -> d.id)\n\n  rivers.selectAll('.river')\n      .data(riversLayer)\n    .enter().append('path')\n      .attr('class', 'river')\n      .attr('id', (d) -> d.id)\n\n  highways.selectAll('.highway')\n      .data(highwaysLayer)\n    .enter().append('path')\n      .attr('class', (d) -> \"highway highway-#{d.properties.grade}\")\n      .attr('id', (d) -> d.id)\n\n  render = ->\n    land.selectAll('.landPoly')\n        .attr('d', map.path)\n\n    segments.selectAll('.segment')\n        .attr('d', map.path)\n\n    lakes.selectAll('.lake')\n        .attr('d', map.path)\n\n    rivers.selectAll('.river')\n        .attr('d', map.path)\n\n    highways.selectAll('.highway')\n        .attr('d', map.path)\n\n    symbols.selectAll('.symbol').remove()\n    symbols.selectAll('.symbolLabel').remove()\n\n    interval = 80 / map.sc\n    symbolList = []\n    for segment in segmentLayer\n      length = segment.properties.length\n      for n in d3.range(0, d3.round(length / interval))\n        point = app.along(segment.geometry.coordinates, interval * (n + 0.5))\n        if segment.properties.symbols\n          point.properties = {symbols: segment.properties.symbols}\n          if app.inside(point.geometry.coordinates, db.bbox)\n            xyproj = map.projection(point.geometry.coordinates)\n            x = d3.round(xyproj[0])\n            y = d3.round(xyproj[1])\n            if app.inside([x, y], [0, 0, map.width, map.height])\n              symbol = {\n                segmentSymbol: true\n                properties: point.properties\n                x: x\n                y: y\n                hw: 6.5 * segment.properties.symbols.length\n                hh: 6.5\n              }\n              symbolList.push(symbol)\n\n    for poi in poiLayer\n      xyproj = map.projection(poi.geometry.coordinates)\n      x = d3.round(xyproj[0])\n      y = d3.round(xyproj[1])\n      if x > 0 and x < map.width and y > 0 and y < map.height\n        if (symbolType = app.symbol[poi.properties.type])?\n          symbol = {\n            id: poi.id\n            properties: poi.properties\n            x: x\n            y: y\n            hw: symbolType.mask.hw\n            hh: symbolType.mask.hh\n          }\n          symbolList.push(symbol)\n\n    symbols.selectAll('.symbol')\n        .data(symbolList)\n      .enter().append('g')\n        .attr('id', (d) -> d.id)\n        .attr('class', 'symbol')\n        .attr('transform', (d) -> \"translate(#{d.x},#{d.y})\")\n        .each(app.symbol.render)\n\n    qt = (d3.geom.quadtree()\n        .extent([[0, 0], [map.width, map.height]])\n        .x (d) -> d.x\n        .y (d) -> d.y\n        )([])\n\n    # search distance\n    sw = d3.max(symbolList, (s) -> s.hw)\n    sh = d3.max(symbolList, (s) -> s.hh)\n\n    collides = (x, y, hw, hh) ->\n      tx1 = x - hw - sw\n      ty1 = y - hh - sh\n      tx2 = x + hw + sw\n      ty2 = y + hh + sh\n      hit = false\n      qt.visit (quad, qx1, qy1, qx2, qy2) ->\n        if (point = quad.point)?\n          dx = Math.abs(point.x - x)\n          dy = Math.abs(point.y - y)\n          if dx < hw + point.hw and dy < hh + point.hh\n            hit = true\n        return qx1 > tx2 or qx2 < tx1 or qy1 > ty2 or qy2 < ty1\n      return hit\n\n    for symbol in symbolList.slice().reverse()\n      continue if symbol.segmentSymbol\n      size = symbol.properties.labelSize\n      mask = app.symbol[symbol.properties.type].mask\n      thw = size.w / 2\n      thh = size.h / 2\n      tx = symbol.x + mask.hw + thw + 1\n      ty = symbol.y + mask.hh - 2 * thh\n      unless collides(tx, ty, thw + 1, thh + 1)\n        if (name = symbol.properties.name)?\n          g = symbols.append('g')\n              .attr('class', 'symbolLabel')\n              .attr('transform', \"translate(#{tx - thw},#{ty - thh - size.dy})\")\n              .attr('for', symbol.id)\n          app.symbol.textWithHalo(g, name)\n          qt.add(x: tx, y: ty, hw: thw, hh: thh, labelFor: symbol)\n\n    if map.debugCollisions\n      qtNodes = []\n      qt.visit((node) -> if node.point then qtNodes.push(node.point); true)\n      symbols.selectAll('.quadtreeRect').data(qtNodes)\n        .enter().append('rect')\n          .attr('class', 'symbol quadtreeRect')\n          .attr('x', (d) -> d.x - d.hw)\n          .attr('y', (d) -> d.y - d.hh)\n          .attr('width', (d) -> d.hw * 2)\n          .attr('height', (d) -> d.hh * 2)\n          .attr('fill', 'none')\n          .attr('stroke-width', 1)\n          .attr('stroke', 'red')\n\n  map.dispatch.on 'redraw.features', ->\n    render()\n\n  map.dispatch.on 'zoomend.features', ->\n    render()\n","ACCURACY_LIMIT = 1000  # 1km\nLOCATION_OFF = 0\nLOCATION_WAIT = 1\nLOCATION_SHOW = 2\nLOCATION_TRACK = 3\n\napp.location = (options) ->\n  map = options.map\n  locationg = options.locationg\n  button = options.locationbuttong\n\n  location = null\n  locationMode = null\n  locationWatch = null\n\n  locationg.append('circle')\n      .attr('class', 'midpoint')\n      .attr('r', 6)\n\n  locationg.append('circle')\n      .attr('class', 'accuracy')\n\n  setMode = (mode) ->\n    locationMode = mode\n    button.attr 'class', switch locationMode\n      when LOCATION_OFF   then 'locationbutton'\n      when LOCATION_WAIT  then 'locationbutton waiting'\n      when LOCATION_SHOW  then 'locationbutton showing'\n      when LOCATION_TRACK then 'locationbutton showing tracking'\n\n  setMode(LOCATION_OFF)\n\n  button.append('rect')\n      .attr('class', 'buttonmask')\n      .attr('x', -25)\n      .attr('y', -25)\n      .attr('width', 50)\n      .attr('height', 50)\n\n  button.on 'click', ->\n      switch locationMode\n        when LOCATION_OFF\n          setMode(LOCATION_WAIT)\n          locationWatch = navigator.geolocation.watchPosition(positionOk, positionHide, enableHighAccuracy: true)\n\n        when LOCATION_WAIT\n          setMode(LOCATION_OFF)\n          navigator.geolocation.clearWatch(locationWatch)\n\n        when LOCATION_SHOW\n          setMode(LOCATION_TRACK)\n          positionUpdate()\n\n        when LOCATION_TRACK\n          setMode(LOCATION_OFF)\n          navigator.geolocation.clearWatch(locationWatch)\n          positionHide()\n\n  app.symbol.locationbutton(button)\n\n  showLocation = () ->\n    if map.zooming\n      return\n\n    unless location?\n      locationg.style('display', 'none')\n      return\n\n    xy = map.projection(map.wgsProjection(location.pos))\n    locationg.style('display', null)\n        .attr('transform', \"translate(#{xy})\")\n\n    locationg.select('.accuracy')\n        .attr('r', d3.max([location.accuracy * map.sc, 8]))\n\n  map.dispatch.on 'zoom.location', ->\n    positionDisableTracking()\n\n  map.dispatch.on 'zoomend.location', ->\n    showLocation()\n\n  map.dispatch.on 'redraw.location', ->\n    showLocation()\n\n  positionOk = (evt) ->\n    coords = evt.coords\n    return if coords.accuracy > ACCURACY_LIMIT\n    pos = [coords.longitude, coords.latitude]\n    return unless app.inside(map.wgsProjection(pos), map.db.bbox)\n    location = {pos: pos, accuracy: coords.accuracy}\n\n    center = false\n    if locationMode == LOCATION_WAIT\n      setMode(LOCATION_SHOW)\n      center = true\n    positionUpdate(center)\n\n  positionUpdate = (center) ->\n    showLocation()\n    if (locationMode == LOCATION_TRACK or center) and location\n      point = map.wgsProjection(location.pos)\n      if app.inside(point, map.db.bbox)\n        scaleTarget = d3.min([map.width, map.height]) / 3 / location.accuracy\n        scale = d3.min([scaleTarget, 3])\n        map.centerAt(point, scale)\n\n  positionDisableTracking = ->\n    if locationMode == LOCATION_TRACK\n      setMode(LOCATION_SHOW)\n\n  positionHide = ->\n    location = null\n    showLocation()\n","app.note = (options) ->\n  map = options.map\n\n  btn = options.g.append('a')\n      .attr('xlink:href', '#')\n\n  btn.append('circle')\n      .attr('r', 17)\n\n  btn.append('text')\n      .attr('transform', \"translate(-3,5)\")\n      .text('!')\n\n  render = ->\n    lngLat = map.proj.inverse(\n        map.projection.invert(\n          [map.width / 2, map.height / 2])\n      ).map(d3.format('.05f'))\n\n    url = 'mailto:haihui@grep.ro?subject=Map%20note&body=' +\n        encodeURIComponent('Location: ' + lngLat.join('/') + '\\n\\n\\n')\n\n    btn.attr('xlink:href', url)\n\n  map.dispatch.on 'zoomend.note', ->\n    render()\n\n  map.dispatch.on 'redraw.note', ->\n    render()\n","app.ACTIONBAR_HEIGHT = 50\n\n\ninitialize = (db) ->\n  map = {\n    db: db\n    dispatch: d3.dispatch('ready', 'zoom', 'zoomend', 'redraw')\n    debug: {}\n  }\n\n  topojson.presimplify(db.topo)\n  topojson.presimplify(db.land)\n  topojson.presimplify(db.dem)\n\n  canvas = app.canvas(map: map)\n\n  actionbarRight = canvas.actionbar.append('g')\n\n  scaleg = actionbarRight.append('g')\n      .attr('class', 'scale')\n      .attr('transform', \"translate(85.5, 15)\")\n\n  locationbuttong = actionbarRight.append('g')\n      .attr('class', 'locationbutton')\n      .attr('transform', \"translate(60, #{app.ACTIONBAR_HEIGHT / 2})\")\n\n#  noteG = actionbarRight.append('g')\n#      .attr('class', 'note')\n#      .attr('transform', \"translate(0, #{app.ACTIONBAR_HEIGHT / 2})\")\n\n\n  meteoG = actionbarRight.append('g')\n    .attr('transform', \"translate(-10, 3)\")\n    .attr('class', \"meteobutton\")\n\n  meteoG.append('a')\n      .attr('xlink:href', db.meteoLink)\n      .attr('target', \"_blank\")\n    .append('image')\n      .attr('xlink:href', '../meteoblue-logo.png')\n      .attr('height', app.ACTIONBAR_HEIGHT - 6)\n      .attr('width', app.ACTIONBAR_HEIGHT - 6)\n\n\n  canvas.actionbar\n    .append('text')\n      .attr('class', 'logo')\n      .attr('transform', \"translate(#{5},#{app.ACTIONBAR_HEIGHT / 2 + 8})\")\n    .append('a')\n      .attr('xlink:href', '..')\n      .text('haihui')\n\n\n\n\n  placeActionbarRight = ->\n    width = parseInt(d3.select('body').style('width'))\n    actionbarRight.attr('transform', \"translate(#{width - 250},0)\")\n\n  placeActionbarRight()\n  d3.select(window).on('resize.placeActionbarRight', placeActionbarRight)\n\n  app.location(\n    map: map\n    locationg: canvas.locationg\n    locationbuttong: locationbuttong\n  )\n\n  app.dem(\n    map: map\n    contours: canvas.contours\n  )\n\n  app.scale(\n    map: map\n    scaleg: scaleg\n  )\n\n  app.features(\n    map: map\n    featuresG: canvas.features\n    landG: canvas.land\n    symbols: canvas.symbols\n  )\n\n#  app.note(\n#    map: map\n#    g: noteG\n#  )\n\n  d3.select('.splash').remove()\n  map.dispatch.ready()\n  return map\n\n\napp.load = (url) ->\n  d3.json url, (error, db) ->\n    if error then return console.error(error)\n    window.map = initialize(db)\n","siFormat = d3.format('s')\ndistanceFormat = (d) -> if d == 0 then '0' else \"#{siFormat(d)}m\"\n\n\napp.scale = (options) ->\n  map = options.map\n  scaleg = options.scaleg\n\n  renderScale = ->\n    deg_150px = (map.projection.invert([150, 0])[0] - map.projection.invert([0, 0])[0])\n    mapscale = d3.scale.linear()\n     .domain([0, deg_150px])\n     .rangeRound([0, 150])\n\n    scaleg.selectAll().remove()\n    axis = d3.svg.axis()\n        .scale(mapscale)\n        .orient('bottom')\n        .ticks(2)\n        .tickSize(6, 0)\n        .tickFormat(distanceFormat)\n    scaleg.call(axis)\n\n  map.dispatch.on('zoom.scale', renderScale)\n  map.dispatch.on('redraw.scale', renderScale)\n","app.symbol = {}\n\napp.symbol.textWithHalo = (g, label) ->\n  g.append('text')\n      .attr('class', 'halo')\n      .text(label)\n  g.append('text')\n      .text(label)\n\n\napp.symbol.calculateLabelWidth = (g, poiLayer) ->\n  g.selectAll('text')\n      .data(poiLayer)\n    .enter().append('text')\n      .attr('class', 'halo')\n      .text((d) -> d.properties.name)\n\n  g.selectAll('text')\n      .each (d) ->\n        bbox = @getBBox()\n        d.properties.labelSize = {\n          w: Math.ceil(bbox.width)\n          h: Math.ceil(bbox.height)\n          dy: bbox.y\n        }\n\n\napp.symbol.defs = (defs) ->\n  marsh = defs.append('pattern')\n      .attr('id', 'symbol-marsh')\n      .attr('width', 15)\n      .attr('height', 15)\n      .attr('patternUnits', 'userSpaceOnUse')\n\n  marsh.append('path')\n      .attr('class', 'marsh-line')\n      .attr('d', \"M0,.5 L8,.5 M6,8.5 L14,8.5\")\n\n\napp.symbol.render = (symbol) ->\n  if symbol.segmentSymbol\n    app.symbol.segmentSymbol(symbol, d3.select(@))\n  else\n    app.symbol[symbol.properties.type](d3.select(@))\n\n\napp.symbol.segmentSymbol = (symbol, group) ->\n  for i in d3.range(0, symbol.properties.symbols.length)\n    dx = - d3.round(13 / 2 * (symbol.properties.symbols.length - 1))\n    g = group.append('g')\n        .attr('transform', \"translate(#{i * 13 + dx},0)\")\n    app.symbol.osmc(symbol.properties.symbols[i])(g)\n\n\napp.symbol.osmc = (src) ->\n  bits = src.split(':')\n  foreground = bits[2].split('_')\n  sym = {\n    waycolor: bits[0]\n    background: bits[1]\n    color: foreground[0]\n    graphic: foreground[1]\n  }\n\n  return (selection) ->\n    size = 12\n    selection.attr('class', 'symbol-osmc')\n\n    selection.append('rect')\n        .attr('class', \"background color-#{sym.background}\")\n        .attr('x', - size/2 - .5)\n        .attr('y', - size/2 - .5)\n        .attr('width', size + 1)\n        .attr('height', size + 1)\n\n    switch sym.graphic\n      when 'stripe'\n        selection.append('rect')\n            .attr('class', \"graphic color-#{sym.color}\")\n            .attr('x', - size / 6)\n            .attr('y', - size / 2)\n            .attr('width', size / 3)\n            .attr('height', size)\n\n      when 'dot'\n        selection.append('circle')\n            .attr('class', \"graphic color-#{sym.color}\")\n            .attr('r', size  * .4)\n\n      when 'cross'\n        selection.append('rect')\n            .attr('class', \"graphic color-#{sym.color}\")\n            .attr('x', - size / 6)\n            .attr('y', - size / 2)\n            .attr('width', size / 3)\n            .attr('height', size)\n\n        selection.append('rect')\n            .attr('class', \"graphic color-#{sym.color}\")\n            .attr('x', - size / 2)\n            .attr('y', - size / 6)\n            .attr('width', size)\n            .attr('height', size / 3)\n\n      when 'triangle'\n        r = size / 2\n        selection.append('path')\n            .attr('class', \"graphic color-#{sym.color}\")\n            .attr('d', \"M#{[0,-r]} L#{[-r,r]} L#{[r,r]} M#{[0,-r]}\")\n\n\napp.symbol.alpine_hut = (selection) ->\n  selection.append('path')\n      .attr('class', 'symbol-alpine_hut')\n      .attr('d', \"M-2,-5 L11,1 L7,1 L7,5 L-7,5 L-7,1 L-11,1 L-2,-5\")\n\napp.symbol.alpine_hut.mask = {hw: 7, hh: 5}\n\napp.symbol.chalet = app.symbol.alpine_hut\napp.symbol.hotel = app.symbol.alpine_hut\napp.symbol.guest_house = app.symbol.alpine_hut\n\n\napp.symbol.basic_hut = (selection) ->\n  selection.append('path')\n      .attr('class', 'symbol-basic_hut')\n      .attr('d', \"M-2,-6 L11,0 L7,0 L7,4 L-7,4 L-7,0 L-11,0 L-2,-6\")\n\napp.symbol.basic_hut.mask = {hw: 7, hh: 5}\n\n\napp.symbol.peak = (selection) ->\n  selection.append('path')\n      .attr('class', 'symbol-peak')\n      .attr('d', \"M0,-4 L5,4 L-5,4 L0,-4\")\n\napp.symbol.peak.mask = {hw: 5, hh: 4}\n\n\napp.symbol.saddle = (selection) ->\n  selection.append('path')\n      .attr('class', 'symbol-saddle')\n      .attr('d', \"M0,0 L6,-4 L6,4 L-6,4 L-6,-4 L0,0\")\n\napp.symbol.saddle.mask = {hw: 6, hh: 4}\n\n\napp.symbol.attraction = (selection) ->\n  d = \"M-4,0 L4,0 M-2,-3.5 L2,3.5 M2,-3.5 L-2,3.5\"\n\n  selection.append('path')\n      .attr('class', 'symbol-attraction-halo')\n      .attr('transform', 'translate(.5,.5)')\n      .attr('d', d)\n\n  selection.append('path')\n      .attr('class', 'symbol-attraction')\n      .attr('transform', 'translate(.5,.5)')\n      .attr('d', d)\n\napp.symbol.attraction.mask = {hw: 4, hh: 4}\n\n\napp.symbol.locationbutton = (selection) ->\n  selection.append('path')\n      .attr('class', 'arrow')\n      .attr('d', \"M17,-17 L0,17 L0,0 L-17,0 L17,-17\")\n\n  selection.append('circle')\n      .attr('class', 'track')\n      .attr('r', 17)\n\n  selection.selectAll('.dot')\n      .data([-10, 0, 10])\n    .enter().append('circle')\n      .attr('class', 'dot')\n      .attr('r', 3)\n      .attr('cx', (d) -> d)\n      .attr('cy', 6)\n","app.index = (objects) ->\n  map = d3.map()\n  for o in objects\n    map.set(o.id, o)\n  return map\n\n\napp.inside = (pos, bbox) ->\n  bbox[0] <= pos[0] and pos[0] < bbox[2] and bbox[1] <= pos[1] and pos[1] < bbox[3]\n\n\napp.length = (points, save=false) ->\n  sum = 0\n  prev = null\n\n  for point in points\n    unless prev?\n      prev = point\n      if save then prev.push(sum)\n      continue\n    dx = point[0] - prev[0]\n    dy = point[1] - prev[1]\n    delta = Math.sqrt(dx*dx + dy*dy)\n    if save then point.push(sum += delta)\n    prev = point\n\n  return sum\n\n\napp.along = (points, distance) ->\n  prev = null\n  for point in points\n    unless prev?\n      prev = point\n      continue\n    if point[3] >= distance\n      f = (distance - prev[3]) / (point[3] - prev[3])\n      dx = point[0] - prev[0]\n      dy = point[1] - prev[1]\n      target = [prev[0] + dx * f, prev[1] + dy * f]\n      return {\n        geometry: {\n          type: 'Point'\n          coordinates: target\n        }\n      }\n    prev = point\n"]}