↪️ implemting Canvas.rotate and prototype degree control (k & l)

src/Canvas.coffee

@@ -37,6 +37,9 @@ module.exports = class Canvas
   translate: (x, y) ->
     mat2d.translate @matrix, @matrix, vec2.fromValues(x, y)
 
+  rotate: (angle) ->
+    mat2d.rotate @matrix, @matrix, angle/180*Math.PI
+
   clear: ->
     @buffer.clear()
 

src/Renderer.coffee

@@ -76,7 +76,7 @@ module.exports = class Renderer
   setSize: (@width, @height) ->
     @canvas = new Canvas @width, @height
 
-  draw: (@view, @zoom) ->
+  draw: (@view, @zoom, @degree) ->
     return if @isDrawing
     @isDrawing = true
     @lastDrawAt = Date.now()

src/Termap.coffee

@@ -26,6 +26,7 @@ module.exports = class Termap
   mousePosition: [0, 0]
   mouseDragging: false
 
+  degree: 0
   center:
     lat: 0
     lng: 0
@@ -110,23 +111,27 @@ module.exports = class Termap
 
       when "z" then @zoomBy @config.zoomStep
       when "a" then @zoomBy -@config.zoomStep
+
+      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
 
       else
-        false
+        null
 
-    if draw
+    if draw isnt null
       @_draw()
-    # else
-    #   # display debug info for unhandled keys
-    #   @notify JSON.stringify key
+    else
+      # display debug info for unhandled keys
+      @renderer.notify JSON.stringify key
 
 
   _draw: ->
-    @renderer.draw @view, @zoom
+    @renderer.draw @view, @zoom, @degree
     @renderer.notify @_getFooter()
 
   _getTiles: ->