🍺 comitting current dev stage of various refactors

main.js

@@ -15,9 +15,4 @@ const Termap = require(__dirname+'/src/Termap');
 const Tile = require(__dirname+'/src/Tile')
 
 termap = new Termap();
-
-// TODO: abstracing this class, create loader class
-data = fs.readFileSync(__dirname+"/tiles/world.pbf.gz");
-tile = new Tile(data);
-termap.renderer.features = tile.layers
-termap._draw();
+termap.init();

package.json

@@ -20,6 +20,7 @@
   "author": "Michael Straßburger <codepoet@cpan.org>",
   "license": "MIT",
   "dependencies": {
+    "bluebird": "^3.4.6",
     "bresenham": "0.0.4",
     "coffee-script": "^1.10.0",
     "earcut": "^2.1.1",

src/Renderer.coffee

@@ -5,10 +5,14 @@
   The Console Vector Tile renderer - bäm!
 ###
 x256 = require 'x256'
+mercator = new (require('sphericalmercator'))()
+tilebelt = require 'tilebelt'
+MBTiles = require 'mbtiles'
 
 Canvas = require './Canvas'
 LabelBuffer = require './LabelBuffer'
 Styler = require './Styler'
+Tile = require './Tile'
 utils = require './utils'
 
 module.exports = class Renderer
@@ -68,8 +72,9 @@ module.exports = class Renderer
   lastDrawAt: 0
 
   labelBuffer: null
+  tileSource: null
 
-  constructor: (@output) ->
+  constructor: (@output, @tileSource) ->
     @labelBuffer = new LabelBuffer()
 
   loadStyleFile: (file) ->
@@ -78,8 +83,8 @@ module.exports = class Renderer
   setSize: (@width, @height) ->
     @canvas = new Canvas @width, @height
 
-  draw: (@view, @zoom, @degree) ->
-    return if @isDrawing
+  draw: (@center, @zoom, @degree) ->
+    return Promise.reject() if @isDrawing
     @isDrawing = true
 
     @notify "rendering..."
@@ -90,55 +95,109 @@ module.exports = class Renderer
       @canvas.setBackground x256 utils.hex2rgb color
 
     @canvas.clear()
-    @canvas.reset()
 
-    @canvas.translate @view[0], @view[1]
-    @_renderLayers()
+    # TODO: tiles = @_tilesInBBox @_getBBox()
 
+    z = Math.max 0, Math.floor @zoom
+    xyz = tilebelt.pointToTileFraction @center.lon, @center.lat, z
+    tile =
+      size: tileSize
+      x: Math.floor xyz[0]
+      y: Math.floor xyz[1]
+      z: z
+
+    tileSize = @config.tileSize / @_scaleAtZoom()
+    position = [
+      @width/2-(xyz[0]-Math.floor(xyz[0]))*tileSize
+      @height/2-(xyz[1]-Math.floor(xyz[1]))*tileSize
+    ]
+
+    @_renderTile tile, position
+    .then =>
+      @_writeFrame()
+
+      @isDrawing = false
+      @lastDrawAt = Date.now()
+
+  _writeFrame: ->
     unless @lastDrawAt
       @_clearScreen()
 
     @output.write "\x1B[?6h"
     @output.write @canvas.frame()
 
-    @isDrawing = false
-    @lastDrawAt = Date.now()
-
   featuresAt: (x, y) ->
     @labelBuffer.featuresAt x, y
 
+  _getBBox: (center = @center, zoom = @zoom) ->
+    [x, y] = utils.ll2xy center.lon, center.lat
+    meterPerPixel = utils.metersPerPixel zoom, center.lat
+
+    width = @width * meterPerPixel
+    height = @height * meterPerPixel
+
+    west = x - width*.5
+    east = x + width*.5
+    south = y + height*.5
+    north = y - height*.5
+
+    box = mercator
+    .inverse([west+1, south])
+    .concat mercator.inverse([east-1, north])
+
+  _tilesInBBox: (bbox, zoom = @zoom) ->
+    tiles = {}
+    [tiles.minX, tiles.minY] = utils.ll2tile bbox[0], bbox[1], Math.floor zoom
+    [tiles.maxX, tiles.maxY] = utils.ll2tile bbox[2], bbox[3], Math.floor zoom
+    tiles
+
   _clearScreen: ->
     @output.write "\x1B[2J"
 
   _write: (output) ->
     @output.write output
 
-  _renderLayers: ->
-    for layer in @config.drawOrder
-      if layer.indexOf(':') isnt -1
-        [layer, filter] = layer.split /:/
-        [filterField, filterValue] = filter.split /=/
-      else
-        filter = false
+  _renderTile: (tile, position) ->
+    @tileSource
+    .getTile tile.z, tile.x, tile.y
+    .then (tile) =>
+      @canvas.reset()
+      @canvas.translate position[0], position[1]
 
-      continue unless @features?[layer]
-
-      scale = (@config.tileSize/@config.projectSize)/Math.pow(2, @zoom)
-
-      if @config.layers[layer]?.minZoom and @zoom > @config.layers[layer].minZoom
-        continue
+      scale = @_scaleAtZoom()
 
       box =
-        minX: -@view[0]*scale
-        minY: -@view[1]*scale
-        maxX: (@width-@view[0])*scale
-        maxY: (@height-@view[1])*scale
+        minX: -position[0]*scale
+        minY: -position[1]*scale
+        maxX: (@width-position[0])*scale
+        maxY: (@height-position[1])*scale
+      # console.log box
+      # process.exit 0
 
-      features = @features[layer].tree.search box
-      @notify "rendering #{features.length} #{layer} features.."
-      for feature in features
-        if not filter or feature.data.properties[filterField] is filterValue
-          @_drawFeature layer, feature, scale
+      for layer in @config.drawOrder
+        if layer.indexOf(':') isnt -1
+          [layer, filter] = layer.split /:/
+          [filterField, filterValue] = filter.split /=/
+        else
+          filter = false
+
+        continue unless tile?[layer]
+
+        if @config.layers[layer]?.minZoom and @zoom > @config.layers[layer].minZoom
+          continue
+
+        features = tile[layer].tree.search box
+
+        @notify "rendering #{features.length} #{layer} features.."
+        for feature in features
+          if not filter or feature.data.properties[filterField] is filterValue
+            @_drawFeature layer, feature, scale
+
+        #@draw @center, @zoom+.3, @degree
+
+  _scaleAtZoom: (zoom = @zoom) ->
+    baseZoom = Math.floor Math.max 0, zoom
+    (@config.tileSize/@config.projectSize)/Math.pow(2, zoom-baseZoom)
 
   _drawFeature: (layer, data, scale) ->
     feature = data.data

src/Termap.coffee

@@ -7,10 +7,11 @@
 
 keypress = require 'keypress'
 TermMouse = require 'term-mouse'
-
+Promise = require 'bluebird'
 mercator = new (require('sphericalmercator'))()
 
 Renderer = require './Renderer'
+TileSource = require './TileSource'
 utils = require './utils'
 
 module.exports = class Termap
@@ -18,6 +19,7 @@ module.exports = class Termap
     input: process.stdin
     output: process.stdout
 
+    source: __dirname+"/../tiles/planet.z0-z8.mbtiles"
     styleFile: __dirname+"/../styles/bright.json"
     zoomStep: 0.2
 
@@ -29,12 +31,14 @@ module.exports = class Termap
   mousePosition: [0, 0]
   mouseDragging: false
 
+  tileSource: null
+
   degree: 0
   center:
-    lat: 49.0189
-    lon: 12.0990
-    #lat: 0 #26.7
-    #lon: 0 #20.2
+    #lat: 49.0189
+    #lon: 12.0990
+    lat: 54.133028
+    lon: 10.609505
 
   zoom: 0
   view: [0, 0]
@@ -44,10 +48,26 @@ module.exports = class Termap
   constructor: (options) ->
     @config[key] = val for key, val of options
 
-    @_initKeyboard()
-    @_initMouse()
+  init: ->
+    Promise
+    .resolve()
+    .then =>
+      @_initKeyboard()
+      @_initMouse()
 
-    @_initRenderer()
+      console.log "loading tilesource"
+      @_initTileSource()
+
+    .then =>
+      console.log "loaded"
+      @_initRenderer()
+
+    .then =>
+      @_draw()
+
+  _initTileSource: ->
+    @tileSource = new TileSource()
+    @tileSource.init @config.source
 
   _initKeyboard: ->
     keypress @config.input
@@ -65,7 +85,7 @@ module.exports = class Termap
     @mouse.on 'move', (event) => @_onMouseMove event
 
   _initRenderer: ->
-    @renderer = new Renderer @config.output
+    @renderer = new Renderer @config.output, @tileSource
     @renderer.loadStyleFile @config.styleFile
 
     @config.output.on 'resize', =>
@@ -129,10 +149,10 @@ module.exports = class Termap
       when "k" then @degree += 15
       when "l" then @degree -= 15
 
-      when "left" then @view[0] += 5
-      when "right" then @view[0] -= 5
-      when "up" then @view[1]+= 5
-      when "down" then @view[1]-= 5
+      when "left" then @center.lon -= 1
+      when "right" then @center.lon += 1
+      when "up" then @center.lat += 1
+      when "down" then @center.lat -= 1
 
       else
         null
@@ -143,40 +163,11 @@ module.exports = class Termap
       # display debug info for unhandled keys
       @renderer.notify JSON.stringify key
 
-
   _draw: ->
-    @renderer.draw @view, @zoom, @degree
-    @renderer.notify @_getFooter()
-
-  _getTiles: ->
-
-  _getBBox: (zoom = @zoom) ->
-    [x, y] = utils.ll2xy @center.lon, @center.lat
-    meterPerPixel = utils.metersPerPixel zoom, @center.lat
-
-    width = @width * meterPerPixel
-    height = @height * meterPerPixel
-
-    west = x - width*.5
-    east = x + width*.5
-    south = y + height*.5
-    north = y - height*.5
-
-    box = mercator
-    .inverse([west+1, south])
-    .concat mercator.inverse([east-1, north])
-
-  _tilesInBBox: (bbox, zoom = @zoom) ->
-    tile = utils.ll2tile bbox[0], bbox[1], Math.floor zoom
-    tiles =
-      minX: Math.max 0, tile[0]
-      minY: Math.max 0, tile[1]
-
-    tile = utils.ll2tile bbox[2], bbox[3], Math.floor zoom
-    tiles.maxX = Math.max 0, tile[0]
-    tiles.maxY = Math.max 0, tile[1]
-
-    tiles
+    @renderer
+    .draw @center, @zoom, @degree
+    .then =>
+      @renderer.notify @_getFooter()
 
   _getFooter: ->
     # features = @renderer.featuresAt @mousePosition.x-1-(@view[0]>>1), @mousePosition.y-1-(@view[1]>>2)
@@ -188,11 +179,11 @@ module.exports = class Termap
     # ).join(", ")+"] "+
     # "#{@mousePosition.x} #{@mousePosition.y}"
     #"center: [#{utils.digits @center.lat, 2}, #{utils.digits @center.lng, 2}]}"
-    bbox = @_getBBox()
-
-    "zoom: #{utils.digits @zoom, 2} "+
+    # bbox = @_getBBox()
+    # tiles = @_tilesInBBox(bbox)
+    "zoom: #{utils.digits @zoom, 2} "
     #{}"bbox: [#{bbox.map((z) -> utils.digits(z, 2)).join(', ')}]"+
-    "tiles: "+(v for k,v of @_tilesInBBox(bbox) when typeof v is "number").join(",")
+    # "tiles: "+("#{k}: #{v}" for k,v of @_tilesInBBox(bbox) when typeof v is "number").join(",")
 
 
     #features.map((f) -> JSON.stringify f.feature.properties).join(" - ")

src/TileSource.coffee

@@ -0,0 +1,52 @@
+###
+  termap - Terminal Map Viewer
+  by Michael Strassburger <codepoet@cpan.org>
+
+  Source for VectorTiles - supports
+  * remote TileServer
+  * local MBTiles and VectorTiles
+###
+
+Promise = require 'bluebird'
+MBTiles = require 'mbtiles'
+
+Tile = require './Tile'
+
+module.exports = class TileSource
+  modes:
+    MBTiles: 1
+    VectorTile: 2
+
+  mode: null
+  cache: {}
+
+  mbtiles: null
+
+  init: (source) ->
+    if source.endsWith ".mbtiles"
+      @mode = @modes.MBTiles
+      @loadMBtils source
+    else
+      throw new Error "source type isn't supported yet"
+
+  loadMBtils: (source) ->
+    new Promise (resolve, reject) =>
+      new MBTiles source, (err, @mbtiles) =>
+        return reject err if err
+        resolve()
+
+  getTile: (z, x, y) ->
+    unless @mode
+      throw new Error "no TileSource defined"
+
+    z = Math.max 0, Math.floor z
+
+    cacheKey = [z, x, y].join "-"
+
+    return if cached = @cache[cacheKey]
+      Promise.resolve cached
+    else if @mode is @modes.MBTiles
+      new Promise (resolve, reject) =>
+        @mbtiles.getTile z, x, y, (err, tileData) =>
+          return reject err if err
+          resolve @cache[cacheKey] = new Tile tileData

src/utils.coffee

@@ -48,6 +48,7 @@ utils =
   deg2rad: (angle) ->
     # (angle / 180) * Math.PI
     angle * 0.017453292519943295
+
   rad2deg: (angle) ->
     angle / Math.PI * 180