diff --git a/js/PointerCamera.js b/js/PointerCamera.js
index b253115..c3cca82 100644
--- a/js/PointerCamera.js
+++ b/js/PointerCamera.js
@@ -52,6 +52,8 @@ var PointerCamera = function() {
     listenerTarget.addEventListener('mousemove', onMouseMove, false);
     listenerTarget.addEventListener('mouseup', onMouseUp, false);
     listenerTarget.addEventListener('mouseout', onMouseUp, false);
+
+    this.collisions = true;
 }
 PointerCamera.prototype = Object.create(THREE.PerspectiveCamera.prototype);
 PointerCamera.prototype.constructor = PointerCamera;
@@ -137,7 +139,7 @@ PointerCamera.prototype.update = function() {
         if (this.moveLeft)     direction.add(Tools.mul(left,    speed));
         if (this.moveRight)    direction.sub(Tools.mul(left,    speed));
 
-        if (!this.isColliding(direction)) {
+        if (!this.collisions || !this.isColliding(direction)) {
             this.position.add(direction);
         }
 
diff --git a/prototype/index.html b/prototype/index.html
index 55284fe..6d2e0a8 100644
--- a/prototype/index.html
+++ b/prototype/index.html
@@ -16,7 +16,10 @@
                 the camera at anytime by clicking on the reset button.
             </p>
             <button id="reset" style="margin-bottom:10px">Reset camera</button>
-            <button id="fullarrow" style="margin-bottom:10px">Full arrow</button>
+            <input type="checkbox" id="fullarrow" style="margin-bottom:10px">
+            <label for="fullarrow">Full arrow</label>
+            <input type="checkbox" id="collisions" style="margin-bottom:10px" checked>
+            <label for="collisions">Collisions</label>
             <div style="border-width:1px; border-style: solid;" id="container"></div>
 #
         </section>
diff --git a/prototype/js/main.js b/prototype/js/main.js
index c590972..e7c03b7 100644
--- a/prototype/js/main.js
+++ b/prototype/js/main.js
@@ -22,19 +22,18 @@ function init() {
     // Add the listener on the button
     document.getElementById('reset').onclick = function() { cameras.mainCamera().reset(); };
     var fullarrow = document.getElementById('fullarrow');
-    fullarrow.onclick = function() {
-        if (fullarrow.innerHTML === 'Full arrow') {
-            fullarrow.innerHTML = "Half arrow";
-        } else {
-            fullarrow.innerHTML = "Full arrow";
-        }
-
+    fullarrow.onchange = function() {
         cameras.map(function(camera) {
             if (camera instanceof FixedCamera) {
-                camera.fullArrow = !camera.fullArrow;
+                camera.fullArrow = fullarrow.checked;
             }
         });
-    };
+    }
+
+    var collisions = document.getElementById('collisions');
+    collisions.onchange = function() {
+        cameras.mainCamera().collisions = collisions.checked;
+    }
 
     // on initialise le moteur de rendu
     container = document.getElementById('container');