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import { System } from '@serpentity/serpentity';
import { Graphics } from 'pixi.js';
import PositionComponent from '@serpentity/components.position';
import RenderableCoupleNode from '../nodes/renderable_couple';
/**
* Renders renderable objects using pixi
*
* @extends {external:Serpentity.System}
* @class CreateCouplingLineSystem
* @param {object} config a configuration object to extend.
*/
export default class CreateCouplingLineSystem extends System {
constructor(config = {}) {
super();
/**
* The node collection of coupled entities entities
*
* @property {external:Serpentity.NodeCollection} coupledEntities
* @instance
* @memberof CreateCouplingLineSystem
*/
this.coupledEntities = null;
}
/**
* Initializes system when added. Requests renderable nodes and
*
* @function added
* @memberof CreateCouplingLineSystem
* @instance
* @param {external:Serpentity.Engine} engine the serpentity engine to
* which we are getting added
*/
added(engine) {
this.coupledEntities = engine.getNodes(RenderableCoupleNode);
}
/**
* Clears system resources when removed.
*
* @function removed
* @instance
* @memberof CreateCouplingLineSystem
*/
removed() {
this.coupledEntities = null;
}
/**
* Runs on every update of the loop. Does nothing.
*
* @function update
* @instance
* @param {Number} currentFrameDuration the duration of the current
* frame
* @memberof CreateCouplingLineSystem
*/
update(currentFrameDuration) {
for (const rootEntity of this.coupledEntities) {
const rootGraphic = rootEntity.container.container;
rootGraphic.removeChildren();
let lineGraphic = new Graphics();
lineGraphic = lineGraphic.lineStyle(5, 0xffffff, 0.9);
let initialPosition = false;
for (const coupledEntity of rootEntity.coupledEntities.coupledEntities) {
if (coupledEntity.hasComponent(PositionComponent)) {
const position = coupledEntity.getComponent(PositionComponent);
if (!initialPosition) {
lineGraphic = lineGraphic.moveTo(position.x, position.y);
initialPosition = true;
continue;
}
lineGraphic = lineGraphic.lineTo(position.x, position.y);
}
}
rootGraphic.addChild(lineGraphic);
}
}
}
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