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, 25 insertions, 0 deletions

diff --git a/lib/components/body.js b/lib/components/body.js
new file mode 100644
index 0000000..7438dc3
--- /dev/null
+++ b/lib/components/body.js
@@ -0,0 +1,25 @@
+import { Component } from '@serpentity/serpentity';
+
+/**
+ * Component that stores a body for physics calculation
+ *
+ * @extends {external:Serpentity.Component}
+ * @class BodyComponent
+ * @param {object} config a configuration object to extend.
+ */
+export default class BodyComponent extends Component {
+  constructor(config) {
+
+    super(config);
+
+    /**
+     * The properthy that holds the pixi container
+     *
+     * @property {external:MatterJs.Body} body
+     * @instance
+     * @memberof BodyComponent
+     */
+    this.body = this.body || null;
+  }
+};
+