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

   1 import { System } from '@serpentity/serpentity';
   2 import { Graphics } from 'pixi.js';
   3
   4 import PositionComponent from '@serpentity/components.position';
   5
   6 import RenderableCoupleNode from '../nodes/renderable_couple';
   7
   8 /**
   9  * Renders renderable objects using pixi
  10  *
  11  * @extends {external:Serpentity.System}
  12  * @class CreateCouplingLineSystem
  13  * @param {object} config a configuration object to extend.
  14  */
  15 export default class CreateCouplingLineSystem extends System {
  16
  17   constructor(config = {}) {
  18
  19     super();
  20
  21     /**
  22      * The node collection of coupled entities entities
  23      *
  24      * @property {external:Serpentity.NodeCollection} coupledEntities
  25      * @instance
  26      * @memberof CreateCouplingLineSystem
  27      */
  28     this.coupledEntities = null;
  29   }
  30
  31   /**
  32    * Initializes system when added. Requests renderable nodes and
  33    *
  34    * @function added
  35    * @memberof CreateCouplingLineSystem
  36    * @instance
  37    * @param {external:Serpentity.Engine} engine the serpentity engine to
  38    * which we are getting added
  39    */
  40   added(engine) {
  41
  42     this.coupledEntities = engine.getNodes(RenderableCoupleNode);
  43   }
  44
  45   /**
  46    * Clears system resources when removed.
  47    *
  48    * @function removed
  49    * @instance
  50    * @memberof CreateCouplingLineSystem
  51    */
  52   removed() {
  53
  54     this.coupledEntities = null;
  55   }
  56
  57   /**
  58    * Runs on every update of the loop. Does nothing.
  59    *
  60    * @function update
  61    * @instance
  62    * @param {Number} currentFrameDuration the duration of the current
  63    * frame
  64    * @memberof CreateCouplingLineSystem
  65    */
  66   update(currentFrameDuration) {
  67
  68     for (const rootEntity of this.coupledEntities) {
  69
  70       const rootGraphic = rootEntity.container.container;
  71       rootGraphic.removeChildren();
  72
  73       let lineGraphic = new Graphics();
  74       lineGraphic = lineGraphic.lineStyle(5, 0xffffff, 0.9);
  75
  76       let initialPosition = false;
  77
  78       for (const coupledEntity of rootEntity.coupledEntities.coupledEntities) {
  79         if (coupledEntity.hasComponent(PositionComponent)) {
  80
  81           const position = coupledEntity.getComponent(PositionComponent);
  82
  83           if (!initialPosition) {
  84             lineGraphic = lineGraphic.moveTo(position.x, position.y);
  85             initialPosition = true;
  86             continue;
  87           }
  88           lineGraphic = lineGraphic.lineTo(position.x, position.y);
  89         }
  90       }
  91
  92       rootGraphic.addChild(lineGraphic);
  93     }
  94   }
  95 };
  96