git.r.bdr.sh - rbdr/sumo/blob - lib/systems/physics_to_attributes.js

   1 import { System } from '@serpentity/serpentity';
   2
   3 import PhysicalWithAttributesNode from '../nodes/physical_with_attributes';
   4
   5 /**
   6  * Distribuets physics data to the related components
   7  *
   8  * @extends {external:Serpentity.System}
   9  * @class PhysicsToAttributesSystem
  10  * @param {object} config a configuration object to extend.
  11  */
  12 export default class PhysicsToAttributesSystem extends System {
  13
  14   constructor(config = {}) {
  15
  16     super();
  17
  18     /**
  19      * The node collection of physics entities
  20      *
  21      * @property {external:Serpentity.NodeCollection} physicalEntities
  22      * @instance
  23      * @memberof PhysicsToAttributesSystem
  24      */
  25     this.physicalEntities = null;
  26   }
  27
  28   /**
  29    * Initializes system when added. Requests physics nodes
  30    *
  31    * @function added
  32    * @memberof PhysicsToAttributesSystem
  33    * @instance
  34    * @param {external:Serpentity.Engine} engine the serpentity engine to
  35    * which we are getting added
  36    */
  37   added(engine) {
  38
  39     this.physicalEntities = engine.getNodes(PhysicalWithAttributesNode);
  40   }
  41
  42   /**
  43    * Clears system resources when removed.
  44    *
  45    * @function removed
  46    * @instance
  47    * @memberof PhysicsToAttributesSystem
  48    */
  49   removed() {
  50
  51     this.physicalEntities = null;
  52   }
  53
  54   /**
  55    * Runs on every update of the loop. Updates the other components
  56    * based on physics
  57    *
  58    * @function update
  59    * @instance
  60    * @param {Number} currentFrameDuration the duration of the current
  61    * frame
  62    * @memberof PhysicsToAttributesSystem
  63    */
  64   update(currentFrameDuration) {
  65
  66     for (const physicalEntity of this.physicalEntities) {
  67       physicalEntity.position.x = physicalEntity.body.body.position.x;
  68       physicalEntity.position.y = physicalEntity.body.body.position.y;
  69       physicalEntity.angle.angle = physicalEntity.body.body.angle;
  70     }
  71   }
  72 };