📐 don't try to paint post-reduction-invalid polygons

src/Canvas.coffee

@@ -50,7 +50,11 @@ module.exports = class Canvas
 
     for ring in rings
       if vertices.length
+        continue if ring.length < 3
         holes.push vertices.length/2
+      else
+        return if ring.length < 3
+
       for point in ring
         vertices = vertices.concat point
 

src/Renderer.coffee

@@ -292,12 +292,12 @@ module.exports = class Renderer
     # else
     #   scaled = ([point.x, point.y] for point in simplify scaled, 2, false)
 
-    if filter
-      if scaled.length is 2
-        if @_seen[ka = (scaled[0]<<8)+scaled[1]] or
-        @_seen[kb = (scaled[1]<<8)+scaled[0]]
-          return []
-
-        @_seen[ka] = @_seen[kb] = true
+    # if filter
+    #   if scaled.length is 2
+    #     if @_seen[ka = (scaled[0]<<8)+scaled[1]] or
+    #     @_seen[kb = (scaled[1]<<8)+scaled[0]]
+    #       return []
+    #
+    #     @_seen[ka] = @_seen[kb] = true
 
     scaled

src/Termap.coffee

@@ -188,7 +188,7 @@ module.exports = class Termap
           @zoom += @zoomy * @config.zoomStep
         else
           @zoomy *= -1
-        @_draw()
+        setImmediate => @_draw()
 
   _getFooter: ->
     # features = @renderer.featuresAt @mousePosition.x-1-(@view[0]>>1), @mousePosition.y-1-(@view[1]>>2)

src/Tile.coffee

@@ -72,7 +72,7 @@ class Tile
 
         # TODO: monkey patching test case for tiles with a reduced extent 4096 / 8 -> 512
         # use feature.loadGeometry() again as soon as we got a 512 extent tileset
-        geometries = feature.loadGeometry() #@_reduceGeometry feature, 8
+        geometries = feature.@_reduceGeometry feature, 8
 
         if style.type is "fill"
           nodes.push @_addBoundaries true,