1 files changed, 72 insertions, 0 deletions
diff --git a/lib/systems/physics_to_attributes.js b/lib/systems/physics_to_attributes.js
new file mode 100644
index 0000000..a49a16b
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+++ b/lib/systems/physics_to_attributes.js
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+import { System } from '@serpentity/serpentity';
+
+import PhysicalWithAttributesNode from '../nodes/physical_with_attributes';
+
+/**
+ * Distribuets physics data to the related components
+ *
+ * @extends {external:Serpentity.System}
+ * @class PhysicsToAttributesSystem
+ * @param {object} config a configuration object to extend.
+ */
+export default class PhysicsToAttributesSystem extends System {
+
+  constructor(config = {}) {
+
+    super();
+
+    /**
+     * The node collection of physics entities
+     *
+     * @property {external:Serpentity.NodeCollection} physicalEntities
+     * @instance
+     * @memberof PhysicsToAttributesSystem
+     */
+    this.physicalEntities = null;
+  }
+
+  /**
+   * Initializes system when added. Requests physics nodes
+   *
+   * @function added
+   * @memberof PhysicsToAttributesSystem
+   * @instance
+   * @param {external:Serpentity.Engine} engine the serpentity engine to
+   * which we are getting added
+   */
+  added(engine) {
+
+    this.physicalEntities = engine.getNodes(PhysicalWithAttributesNode);
+  }
+
+  /**
+   * Clears system resources when removed.
+   *
+   * @function removed
+   * @instance
+   * @memberof PhysicsToAttributesSystem
+   */
+  removed() {
+
+    this.physicalEntities = null;
+  }
+
+  /**
+   * Runs on every update of the loop. Updates the other components
+   * based on physics
+   *
+   * @function update
+   * @instance
+   * @param {Number} currentFrameDuration the duration of the current
+   * frame
+   * @memberof PhysicsToAttributesSystem
+   */
+  update(currentFrameDuration) {
+
+    for (const physicalEntity of this.physicalEntities) {
+      physicalEntity.position.x = physicalEntity.body.body.position.x;
+      physicalEntity.position.y = physicalEntity.body.body.position.y;
+      physicalEntity.angle.angle = physicalEntity.body.body.angle;
+    }
+  }
+};