🔍 endless magnification zoomability after max tile zoom level is reached

README.md

@@ -69,7 +69,7 @@ No web browser around? No worries - discover the planet in your console!
   * [ ] Viewport
     * [x] start with zoom level which shows full vector tile
     * [X] boundary based on current zoom & size
-    * [ ] determain tiles to show
+    * [X] determain tiles to show
     * [X] zoom while keeping center
     * [ ] calculate tile areas
     * [X] center based on mercator
@@ -94,7 +94,7 @@ No web browser around? No worries - discover the planet in your console!
   * [ ] line drawing
     * [x] support for stroke width
     * [ ] support for dashed/dotted lines?
-  * [x] feature selection for priority rerendering (roads -> warter -> roads:bridges)
+  * [ ] feature selection for priority rerendering (roads -> warter -> roads:bridges)
 
   * [ ] label drawing
     * [x] support for point labels

package.json

@@ -36,6 +36,7 @@
     "request-promise": "^4.1.1",
     "sphericalmercator": "^1.0.5",
     "term-mouse": "^0.1.1",
+    "tilebelt": "^1.0.1",
     "vector-tile": "^1.3.0",
     "x256": "0.0.2"
   }

src/Renderer.coffee

@@ -19,7 +19,6 @@ utils = require './utils'
 module.exports = class Renderer
   cache: {}
   config:
-    baseZoom: 4
     fillPolygons: true
     language: 'de'
 
@@ -27,6 +26,7 @@ module.exports = class Renderer
 
     tileSize: 4096
     projectSize: 256
+    maxZoom: 14
 
     #"poi_label", "water",
     drawOrder: [
@@ -115,7 +115,7 @@ module.exports = class Renderer
       @lastDrawAt = Date.now()
 
   _visibleTiles: (center, zoom) ->
-    z = Math.max 0, Math.floor zoom
+    z = Math.min @config.maxZoom, Math.max 0, Math.floor zoom
     xyz = tilebelt.pointToTileFraction center.lon, center.lat, z
 
     tiles = []
@@ -222,7 +222,7 @@ module.exports = class Renderer
     @output.write output
 
   _scaleAtZoom: (zoom) ->
-    baseZoom = Math.floor Math.max 0, zoom
+    baseZoom = Math.min @config.maxZoom, Math.floor Math.max 0, zoom
     (@config.tileSize/@config.projectSize)/Math.pow(2, zoom-baseZoom)
 
   _drawFeature: (layer, data, scale, zoom) ->
@@ -256,6 +256,7 @@ module.exports = class Renderer
 
       when "Point"
         text = feature.properties["name_"+@config.language] or
+          feature.properties["name_en"] or
           feature.properties["name"] or
           feature.properties.house_num or
           #@config.icons[feature.properties.maki] or

src/Termap.coffee

@@ -46,9 +46,8 @@ module.exports = class Termap
     lat: 49.0189
     lon: 12.0990
 
-
   minZoom: null
-  maxZoom: 14.9
+  maxZoom: 18
 
   constructor: (options) ->
     @config[key] = val for key, val of options