78 lines
3.1 KiB
TypeScript
78 lines
3.1 KiB
TypeScript
import RainbowTrail from "./RainbowTrail";
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import RainbowBottleWater from "./RainbowBottleWater";
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import { RAINBOW_CAST_SECONDS } from "./RainbowRules";
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/** C 方案开局自动施放一次；地图在尾迹消散后才开放操作。 */
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export default class RainbowOldOpening {
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private flight: RainbowTrail;
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private from: cc.Vec2;
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private to: cc.Vec2;
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private elapsed = 0;
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private landed = false;
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private disposed = false;
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private hidden = false;
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private hide = () => {
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this.hidden = true;
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if (this.flight) this.flight.update(true);
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if (cc.isValid(this.bottle, true)) this.bottle.active = false;
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};
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private show = () => {
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this.hidden = false;
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if (!this.disposed && cc.isValid(this.bottle, true)) this.bottle.active = true;
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};
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constructor(parent: cc.Node, private bottle: cc.Node, to: cc.Vec2, private onLand: () => void) {
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this.from = parent.convertToNodeSpaceAR(bottle.convertToWorldSpaceAR(cc.v2(0, 0)));
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this.to = cc.v2(to.x, to.y);
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bottle.active = true;
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bottle.color = cc.Color.WHITE;
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bottle.getComponent(cc.Sprite).fillRange = 1;
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if (!bottle.getComponent(RainbowBottleWater)) bottle.addComponent(RainbowBottleWater);
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this.flight = new RainbowTrail(parent, RAINBOW_CAST_SECONDS);
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this.flight.node.setPosition(this.from);
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// 转场结束前由地图保持暂停，不能让粒子在遮罩后先发射。
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this.flight.update(true);
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cc.game.on(cc.game.EVENT_HIDE, this.hide);
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cc.game.on(cc.game.EVENT_SHOW, this.show);
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}
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/** 返回 true 表示飞行和尾迹均已结束；开局不依赖游戏倒计时。 */
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update(dt: number, paused = false): boolean {
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if (this.disposed) return true;
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if (!this.flight.update(this.hidden || paused)) {
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// RainbowTrail 已自行释放资源，不能在 dispose 中再销毁一次。
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this.flight = null;
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this.dispose();
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return true;
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}
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if (this.hidden || paused || this.landed) return false;
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this.elapsed += dt;
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const t = Math.min(1, this.elapsed / RAINBOW_CAST_SECONDS);
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// 与 B 同一条弧线：先抛到目标上方，再竖直落入目标。
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const top = Math.max(this.from.y, this.to.y) + 180;
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const controlY = top + Math.sqrt((top - this.from.y) * (top - this.to.y));
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const u = 1 - t;
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this.flight.node.setPosition(this.to.x + (this.from.x - this.to.x) * u * u,
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u * u * this.from.y + 2 * u * t * controlY + t * t * this.to.y);
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this.flight.setProgress(t);
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if (t >= 1) {
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this.landed = true;
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this.flight.stop();
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this.onLand();
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}
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return this.disposed;
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}
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dispose(): void {
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if (this.disposed) return;
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this.disposed = true;
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if (this.flight) {
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this.flight.destroy();
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this.flight = null;
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}
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cc.game.off(cc.game.EVENT_HIDE, this.hide);
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cc.game.off(cc.game.EVENT_SHOW, this.show);
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if (cc.isValid(this.bottle, true)) this.bottle.active = false;
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}
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}
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