Physics Engine (#4)

* Add matter-js as a dependency

* Add body component

* Fix renderable node doc

* Add the physics node type

* Correct typo in physics enabled node types

* Update docs on render system

* Add physics system

* Update changelog

* Add physics engine to main app

* Tweak the gravity of the world

* Add body to sumo factory

* Add angle component

* Add angle to entity

* Add angle to the nodes

* Pass angle between systems

* Set default angle to 0

* Split systems and nodes

* Fix indentaion in physics world control

* Add third sumo entity

* Adjust values for constriants and physics

* Correct docs in new nodes

* Update built-in docs

1 files changed, 14 insertions, 2 deletions

diff --git a/lib/factories/pixi.js b/lib/factories/pixi.js
index e3c1b5a..851a074 100644
--- a/lib/factories/pixi.js
+++ b/lib/factories/pixi.js
@@ -16,9 +16,9 @@ export default {
    * @memberof PixiFactory
    * @return {external:CreateJs.Container} the created container
    */
-  createSumo() {
+  createSumo(config) {
 
-    const radius = 25;
+    const radius = config.radius;
 
     // The body
     const body = new Graphics();
@@ -61,6 +61,18 @@ export default {
     body.addChild(rightPupil);
 
     return body;
+  },
+
+  /**
+   * Creates an empty graphic
+   *
+   * @function createEmptyGraphic
+   * @memberof PixiFactory
+   * @return {external:CreateJs.Container} the created container
+   */
+  createEmptyGraphic(config) {
+
+    return new Graphics();
   }
 };