🔍 using spatial indexing to determain which features to render

README.md

@@ -27,7 +27,7 @@ No web browser around? No worries - discover the planet in your console!
 ## Behind the scenes
 ### Libraries
 #### Mastering the console
-  * [`x256`](https://github.com/substack/node-x256) for finding nearest xterm-256 [color codes](https://en.wikipedia.org/wiki/File:Xterm_256color_chart.svg)
+  * [`x256`](https://github.com/substack/node-x256) for converting RGB values to closest xterm-256 [color code](https://en.wikipedia.org/wiki/File:Xterm_256color_chart.svg)
   * [`term-mouse`](https://github.com/CoderPuppy/term-mouse) for mouse handling
   * [`keypress`](https://github.com/TooTallNate/keypress) for input handling
 
@@ -55,7 +55,7 @@ No web browser around? No worries - discover the planet in your console!
   * [x] support for point labels
   * [x] dynamic decluttering of labels
   * [x] centering text labels
-  * [ ] clipping fix when x<0 after repositioning
+  * [x] clipping fix when x<0 after repositioning
   * [ ] multi line label
   * [ ] label margin to avoid POI overlap?
   * [ ] translatable raster fonts
@@ -81,7 +81,6 @@ No web browser around? No worries - discover the planet in your console!
 * [x] accurate mouse drag&drop
 * [x] handle console resize
 * [x] styling
-* [ ] turn this into a [`blessed-contrib`](https://github.com/yaronn/blessed-contrib) widget
 
 ## License
 #### The MIT License (MIT)

src/Canvas.coffee

@@ -2,7 +2,7 @@
   termap - Terminal Map Viewer
   by Michael Strassburger <codepoet@cpan.org>
 
-  Simple pixel to barille character mapper
+  Canvas-like painting abstraction for BrailleBuffer
 
   Implementation inspired by node-drawille-canvas (https://github.com/madbence/node-drawille-canvas)
   * added support for filled polygons

src/Renderer.coffee

@@ -41,14 +41,8 @@ module.exports = class Renderer
     layers:
       housenum_label: minZoom: 1.5
       building: minZoom: 3.8
-
-      place_label: true
       poi_label: minZoom: 3
 
-      road: true
-      water: true
-      admin: true
-
   isDrawing: false
   lastDrawAt: 0
 
@@ -97,10 +91,17 @@ module.exports = class Renderer
       @notify "rendering #{layer}..."
       scale = Math.pow 2, @zoom
 
-      if @config.layers[layer].minZoom and @zoom > @config.layers[layer].minZoom
+      if @config.layers[layer]?.minZoom and @zoom > @config.layers[layer].minZoom
         continue
 
-      for feature in @features[layer].tree.search(minX: 0, minY: 0, maxX: 4096, maxY: 4096)
+      box =
+        minX: -@view[0]*scale
+        minY: -@view[1]*scale
+        maxX: (@width-@view[0])*scale
+        maxY: (@height-@view[1])*scale
+
+      for feature in @features[layer].tree.search box
+        #@notify "rendering #{feature.data.id}"
         @_drawFeature layer, feature.data, scale
 
   _drawFeature: (layer, feature, scale) ->

src/Termap.coffee

@@ -31,7 +31,7 @@ module.exports = class Termap
     lng: 12.096956
 
   zoom: 2
-  view: [0, 0]
+  view: [0, 100]
 
   scale: 4
 
@@ -66,7 +66,7 @@ module.exports = class Termap
 
   _resizeRenderer: (cb) ->
     @width = (process.stdout.columns-1) >> 1 << 2
-    @height = process.stdout.rows >> 2 << 4
+    @height = Math.ceil(process.stdout.rows/2) << 4
 
     @renderer.setSize @width, @height