kopia lustrzana https://github.com/rastapasta/mapscii
🏃 implementing polyline simplification, label buffering, cleanup
Michael Straßburger
rodzic
caea4c6aec
commit
ae65f95e24
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@ -4,9 +4,9 @@
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The Console Vector Tile renderer - bäm!
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###
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tilebelt = require 'tilebelt'
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Promise = require 'bluebird'
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x256 = require 'x256'
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simplify = require 'simplify-js'
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Canvas = require './Canvas'
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LabelBuffer = require './LabelBuffer'
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@ -14,8 +14,6 @@ Styler = require './Styler'
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Tile = require './Tile'
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utils = require './utils'
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#simplify = require 'simplify-js'
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module.exports = class Renderer
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config:
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language: 'en'
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@ -87,19 +85,19 @@ module.exports = class Renderer
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_visibleTiles: (center, zoom) ->
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z = Math.min @config.maxZoom, Math.max 0, Math.floor zoom
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xyz = tilebelt.pointToTileFraction center.lon, center.lat, z
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center = utils.ll2tile center.lon, center.lat, z
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tiles = []
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scale = @_scaleAtZoom zoom
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tileSize = @config.tileSize / scale
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for y in [Math.floor(xyz[1])-1..Math.floor(xyz[1])+1]
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for x in [Math.floor(xyz[0])-1..Math.floor(xyz[0])+1]
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for y in [Math.floor(center.y)-1..Math.floor(center.y)+1]
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for x in [Math.floor(center.x)-1..Math.floor(center.x)+1]
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tile = x: x, y: y, z: z
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position =
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x: @width/2-(xyz[0]-tile.x)*tileSize
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y: @height/2-(xyz[1]-tile.y)*tileSize
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x: @width/2-(center.x-tile.x)*tileSize
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y: @height/2-(center.y-tile.y)*tileSize
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gridSize = Math.pow 2, z
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@ -175,7 +173,8 @@ module.exports = class Renderer
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_drawFeature: (tile, feature) ->
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if feature.style.minzoom and tile.zoom < feature.style.minzoom
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return false
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else if feature.style.maxzoom and tile.zoom > feature.style.maxzoom
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return false
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switch feature.style.type
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when "line"
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@ -197,53 +196,49 @@ module.exports = class Renderer
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feature.properties["name_en"] or
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feature.properties["name"] or
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feature.properties.house_num or
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"◉"
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genericSymbol = "◉"
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points = @_scaleAndReduce tile, feature, feature.points
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for point in points
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x = point[0] - text.length
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return false if @_seen[text] and not genericSymbol
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placed = false
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for point in @_scaleAndReduce tile, feature, feature.points
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x = point.x - text.length
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margin = @config.layers[feature.layer]?.margin or @config.labelMargin
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if @labelBuffer.writeIfPossible text, x, point[1], feature, margin
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@canvas.text text, x, point[1], feature.color
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if @labelBuffer.writeIfPossible text, x, point.y, feature, margin
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@canvas.text text, x, point.y, feature.color
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placed = true
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break
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else if @config.layers[feature.layer]?.cluster and
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@labelBuffer.writeIfPossible "X", point[0], point[1], feature, 3
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@canvas.text "◉", point[0], point[1], feature.color
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@labelBuffer.writeIfPossible "◉", point.x, point.y, feature, 3
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@canvas.text "◉", point.x, point.y, feature.color
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placed = true
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break
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@_seen[text] = true if placed
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true
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_seen: {}
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_scaleAndReduce: (tile, feature, points, filter = true) ->
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lastX = null
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lastY = null
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outside = false
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lastX = lastY = outside = null
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scaled = []
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# seen = {}
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minX = minY = -@tilePadding
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maxX = @width+@tilePadding
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maxY = @height+@tilePadding
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for point in points
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x = Math.floor tile.position.x+(point.x/tile.scale)
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y = Math.floor tile.position.y+(point.y/tile.scale)
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if lastX is x and lastY is y
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continue
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continue if lastX is x and lastY is y
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lastY = y
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lastX = x
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# TODO: benchmark
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# continue if seen[idx = (y<<8)+x]
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# seen[idx] = true
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if filter
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if (
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x < -@tilePadding or
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y < -@tilePadding or
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x > @width+@tilePadding or
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y > @height+@tilePadding
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)
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if x < minX or x > maxX or y < minY or y > maxY
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continue if outside
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outside = true
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else
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@ -251,23 +246,15 @@ module.exports = class Renderer
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outside = null
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scaled.push [lastX, lastY]
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scaled.push [x, y] #x: x, y: y
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scaled.push x: x, y: y
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if scaled.length < 2
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if feature.style.type isnt "symbol"
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if feature.style.type isnt "symbol"
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if scaled.length < 2
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return []
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# else
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# scaled = ([point.x, point.y] for point in simplify scaled, 2, false)
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#
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# if filter
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# if scaled.length is 2
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# if @_seen[ka = (scaled[0]<<8)+scaled[1]] or
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# @_seen[kb = (scaled[1]<<8)+scaled[0]]
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# return []
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#
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# @_seen[ka] = @_seen[kb] = true
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scaled
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simplify scaled, .5
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else
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scaled
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_generateDrawOrder: (zoom) ->
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if zoom < 2
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@ -191,18 +191,12 @@ module.exports = class Termap
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setImmediate => @_draw()
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_getFooter: ->
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# features = @renderer.featuresAt @mousePosition.x-1-(@view[0]>>1), @mousePosition.y-1-(@view[1]>>2)
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# "features: ["+features.map((f) ->
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# JSON.stringify
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# name: f.feature.properties.name
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# type: f.feature.properties.type
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# rank: f.feature.properties.scalerank
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# ).join(", ")+"] "+
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#{}"#{@mousePosition.x} #{@mousePosition.y} " +
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# bbox = @_getBBox()
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# tiles = @_tilesInBBox(bbox)
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# tile = utils.ll2tile @center.lon, @center.lat, @zoom
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# "tile: #{utils.digits tile.x, 3}, #{utils.digits tile.x, 3} "+
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"center: #{utils.digits @center.lat, 3}, #{utils.digits @center.lon, 3} "+
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"zoom: #{utils.digits @zoom, 2} "
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"zoom: #{utils.digits @zoom, 2} "+
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"mouse: #{@mousePosition.x} #{@mousePosition.y} "+
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notify: (text) ->
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@_write "\r\x1B[K"+text unless @config.headless
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@ -217,9 +211,14 @@ module.exports = class Termap
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@zoom += step
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moveBy: (lat, lon) ->
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@center.lat += lat
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@center.lon += lon
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@setCenter @center.lat+lat, @center.lon+lon
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@center.lon = (@center.lon+180)%360-180
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@center.lat = 85.0511 if @center.lat > 85.0511
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@center.lat = -85.0511 if @center.lat < -85.0511
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setCenter: (lat, lon) ->
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lon += 360 if lon < -180
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lon -= 360 if lon > 180
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lat = 85.0511 if lat > 85.0511
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lat = -85.0511 if lat < -85.0511
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@center.lat = lat
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@center.lon = lon
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