78 lines
2.1 KiB
TypeScript
78 lines
2.1 KiB
TypeScript
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import { _decorator, Component, error, Node, randomRange, Vec3 } from 'cc';
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import { Res } from '../../core/res/res';
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import { fun } from '../../core/util/fun';
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const { ccclass, property } = _decorator;
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@ccclass('FxBulletTracer')
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export class FxBulletTracer extends Component {
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@property
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poolCount = 5;
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@property
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segment = 5;
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@property
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hiddenTime = 0.05;
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pool:Array<Node> | undefined;
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__preload() {
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this.node.on('init', this.init, this);
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}
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init() {
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this.pool = new Array(this.poolCount);
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const firstChild = this.node.children[0];
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this.pool[0] = firstChild;
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firstChild.active = false;
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for(let i = 1; i < this.poolCount; i++) {
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this.pool[i] = Res.instNode(firstChild, this.node);
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}
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this.node.on('setTracer', this.setTracer, this);
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}
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onDestroy() {
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this.node.off('init', this.init, this);
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this.node.off('setTracer', this.setTracer, this);
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}
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public setTracer(start:Vec3, end:Vec3) {
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const endPosition = end.clone();
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const direction = end.clone().subtract(start).normalize();
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const length = endPosition.subtract(start).length();
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const eachSegment = length/this.poolCount;
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const count = this.calculateSegment(length);
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const startPosition = start.clone();
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for(let i = 0; i < count; i++) {
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const currentLength = eachSegment;
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const currentNode = this.pool![i];
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currentNode.active = true;
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currentNode.setPosition(startPosition);
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currentNode.lookAt(end);
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currentNode.setScale(0.3, 1, randomRange(0.3, currentLength));
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startPosition.add(direction.clone().multiplyScalar(currentLength));
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}
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fun.delay(this.hiddenLines.bind(this), this.hiddenTime);
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}
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calculateSegment(length:number):number {
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let count = Math.round(length / this.segment);
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if(count > this.poolCount) count = this.poolCount;
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return count;
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}
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hiddenLines() {
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for(let i = 0; i < this.poolCount; i++) this.pool![i].active = false;
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}
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}
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