🏃 adding tile feature padding to improve edge clipping

src/Renderer.coffee

@@ -23,7 +23,7 @@ module.exports = class Renderer
 
     labelMargin: 5
 
-    tileSize: 4096 #512
+    tileSize: 512
     projectSize: 256
     maxZoom: 14
 
@@ -81,6 +81,7 @@ module.exports = class Renderer
 
   labelBuffer: null
   tileSource: null
+  tilePadding: 64
 
   constructor: (@output, @tileSource) ->
     @labelBuffer = new LabelBuffer()
@@ -187,8 +188,8 @@ module.exports = class Renderer
         continue unless tile.features[layer]?.length
 
         for feature in tile.features[layer]
-          continue if feature.id and drawn[feature.id]
+          # continue if feature.id and drawn[feature.id]
-          drawn[feature.id] = true
+          # drawn[feature.id] = true
 
           @_drawFeature tile, feature
 
@@ -252,13 +253,12 @@ module.exports = class Renderer
 
   _scaleAndReduce: (tile, feature) ->
     reduced = []
-    seen = {}
     for points in feature.points
-
+      seen = {}
       lastX = null
       lastY = null
 
-      firstOutside = null
+      outside = null
       scaled = []
 
       for point in points
@@ -271,7 +271,10 @@ module.exports = class Renderer
         lastY = y
         lastX = x
 
-        if x < 0 or y < 0 or x > @width or y > @width
+        if x < -@tilePadding or
+        y < -@tilePadding or
+        x > @width+@tilePadding or
+        y > @height+@tilePadding
           continue if outside
           outside = true
         else
@@ -282,9 +285,8 @@ module.exports = class Renderer
         scaled.push [x, y]
 
       if scaled.length is 2
-        ka = scaled[0].concat(scaled[1]).join '-'
+        if seen[ka = scaled[0].concat(scaled[1]).join '-'] or
-        kb = scaled[1].concat(scaled[0]).join '-'
+        seen[kb = scaled[1].concat(scaled[0]).join '-']
-        if seen[ka] or seen[kb]
           continue
 
         seen[ka] = seen[kb] = true

src/Termap.coffee

@@ -22,9 +22,9 @@ module.exports = class Termap
     #source: __dirname+"/../mbtiles/regensburg.mbtiles"
     styleFile: __dirname+"/../styles/bright.json"
 
-    initialZoom: 14
+    initialZoom: null
     maxZoom: 18
-    zoomStep: 0.2
+    zoomStep: 0.1
 
     headless: false
     # size:
@@ -155,6 +155,7 @@ module.exports = class Termap
       when "q"
         process.exit 0
 
+      when "w" then @zoomy = true
       when "a" then @zoomBy @config.zoomStep
       when "z" then @zoomBy -@config.zoomStep
 
@@ -172,7 +173,6 @@ module.exports = class Termap
       # display debug info for unhandled keys
       @notify JSON.stringify key
 
-  drawn: 0
   _draw: ->
     @renderer
     .draw @center, @zoom
@@ -181,8 +181,12 @@ module.exports = class Termap
       @notify @_getFooter()
     .catch =>
       @notify "renderer is busy"
-    # .then =>
+    .then =>
-    #   @_draw() if @drawn++ < 20
+      if @zoomy and @zoom < @config.maxZoom
+        @zoom += @config.zoomStep
+        @_draw()
+      else
+        @zoomy = false
 
   _getFooter: ->
     # features = @renderer.featuresAt @mousePosition.x-1-(@view[0]>>1), @mousePosition.y-1-(@view[1]>>2)

src/Tile.coffee

@@ -53,7 +53,7 @@ class Tile
            continue unless style
 
         # TODO: monkey patching test case for tiles with a reduced extent
-        points = feature.loadGeometry() #@_reduceGeometry feature, 8
+        points = @_reduceGeometry feature, 8
 
         data =
           style: style

styles/bright.json

@@ -1557,82 +1557,6 @@
         ]
       ]
     },
-    {
-      "type": "line",
-      "id": "admin_level_3_maritime",
-      "paint": {
-        "line-color": "#a0c8f0",
-        "line-width": {
-          "base": 1,
-          "stops": [
-            [
-              4,
-              0.4
-            ],
-            [
-              5,
-              1
-            ],
-            [
-              12,
-              3
-            ]
-          ]
-        }
-      },
-      "source-layer": "admin",
-      "filter": [
-        "all",
-        [
-          ">=",
-          "admin_level",
-          3
-        ],
-        [
-          "==",
-          "maritime",
-          1
-        ]
-      ]
-    },
-    {
-      "type": "line",
-      "id": "admin_level_2_maritime",
-      "paint": {
-        "line-color": "#a0c8f0",
-        "line-width": {
-          "base": 1,
-          "stops": [
-            [
-              4,
-              1.4
-            ],
-            [
-              5,
-              2
-            ],
-            [
-              12,
-              8
-            ]
-          ]
-        }
-      },
-      "source-layer": "admin",
-      "filter": [
-        "all",
-        [
-          "==",
-          "admin_level",
-          2
-        ],
-        [
-          "==",
-          "maritime",
-          1
-        ]
-      ]
-    },
     {
       "type": "symbol",
       "id": "water_label",