Added the possibility to reset the composition maintaining the canvas size

minecraftcodex/studio/static/coffee/studio.coffee

@@ -1,5 +1,6 @@
 Studio =
     domElement: null
+    _dom: null
 
     renderer: null
     width: 600
@@ -8,6 +9,7 @@ Studio =
     scene: null
 
     camera: null
+    _cameraType: null
 
     animating: false
 
@@ -24,6 +26,7 @@ Studio =
     # Callbacks
     onCameraChange: (cameraType) ->
         if "#{cameraType}Camera" of StudioObjects
+            @_cameraType = cameraType
             @camera = StudioObjects["#{cameraType}Camera"].init @width, @height
             if not @animating
                 @animate()
@@ -31,9 +34,11 @@ Studio =
     # Animation
     animate: ->
         if @scene and @camera
+            if not @animating
+                @animating = true
             @renderer.render @scene, @camera
 
-            requestAnimationFrame =>
+            @_animationFrame = requestAnimationFrame =>
                 @animate()
 
     # Scene helpers
@@ -45,6 +50,8 @@ Studio =
         @domElement.style.width = "#{@width}px"
         @domElement.style.height = "#{@height}px"
 
+        @onCameraChange @_cameraType
+
     # Tests
     changeTexture: (path) ->
         @scene.remove @object
@@ -57,11 +64,17 @@ Studio =
         @object.rotation.set Math.PI/6, (Math.PI/4)*-1, 0
         @scene.add @object
 
+    reset: ->
+        cancelAnimationFrame @_animationFrame
+        @renderer.domElement.remove()
+        @init @_dom, @width, @height
+
     init: (dom, width, height) ->
         if not @checkWebGLsupport()
             return false
 
         @domElement = document.querySelector dom
+        @_dom = dom
 
         @renderer = new THREE.WebGLRenderer()
         @setSize width, height