134 lines
3.7 KiB
TypeScript
134 lines
3.7 KiB
TypeScript
// assets/scripts/BallPhysics.ts
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import {
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_decorator,
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Component,
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Node,
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RigidBody,
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Vec3,
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math,
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SphereCollider,
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Contact2DType,
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MeshCollider,
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ICollisionEvent,
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ITriggerEvent,
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} from "cc";
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const { ccclass, property } = _decorator;
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@ccclass("BallPhysics")
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export class BallPhysics extends Component {
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@property({ tooltip: "马格努斯系数（越大弧线越明显）" }) magnusK = 0.1;
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@property({ tooltip: "空气阻力" }) dragK = 0.001;
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@property({ tooltip: "风力（m/s^2）" }) windStrength = 0;
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@property({ tooltip: "风向" }) windDir: Vec3 = new Vec3(1, 0, 0);
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@property({ tooltip: "自动重置高度阈值（低于视为无效球）" }) resetY = -2;
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@property(Node) spawnPoint!: Node;
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@property(Node) ball!: Node;
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private rb!: RigidBody;
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private tmpF = new Vec3();
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private v = new Vec3();
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private w = new Vec3();
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private wind = new Vec3();
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private pos = new Vec3();
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// ⚽ 保存 spin（KickInput 设置进来）
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private spin = new Vec3();
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onLoad() {
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this.rb = this.ball.getComponent(RigidBody)!;
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const col = this.ball.getComponent(MeshCollider);
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if (col) {
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console.log(22223333, col);
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col.on("onTriggerEnter", this.onTriggerEnter, this);
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col.on("onTriggerStay", this.onTriggerStay, this);
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col.on("onCollisionEnter", this.onCollisionEnter, this);
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}
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this.wind.set(this.windDir).normalize();
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}
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private onTriggerStay(event: ITriggerEvent) {
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console.log(event.type, event);
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}
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onTriggerEnter(event: ICollisionEvent) {
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console.log("⚽ 触发器进入:", event.otherCollider.node.name);
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}
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onCollisionEnter(event: ICollisionEvent) {
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console.log("⚽ 碰撞进入:", event.otherCollider.node.name);
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}
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init() {
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this.rb = this.node.getComponent(RigidBody)!;
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this.wind.set(this.windDir).normalize();
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this.pos = this.node.worldPosition.clone();
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}
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setWind(direction: Vec3, strength: number) {
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this.wind.set(direction).normalize();
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this.windStrength = strength;
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}
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resetBall() {
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if (!this.spawnPoint) return;
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this.rb.clearState();
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this.node.worldPosition = this.pos; //this.spawnPoint.worldPosition.clone();
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this.rb.setLinearVelocity(new Vec3());
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this.rb.setAngularVelocity(new Vec3());
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}
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/** 设置自旋（由 KickInput 调用） */
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public setSpin(spin: Vec3) {
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this.spin.set(spin);
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}
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/** 发射足球 */
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shootBall(dir: Vec3, speed: number) {
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this.rb.clearState();
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this.rb.setLinearVelocity(dir.clone().multiplyScalar(speed));
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this.rb.setAngularVelocity(this.spin); // 应用横向旋转
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}
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update(dt: number) {
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if (!this.rb) return;
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this.rb.getLinearVelocity(this.v);
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// 1. 空气阻力（与预测保持一致： -k * v * |v|）
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const speed = this.v.length();
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if (speed > 0.01) {
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const drag = this.v.clone().multiplyScalar(-this.dragK * speed);
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this.rb.applyForce(drag);
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}
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// 2. 马格努斯力： F = k * (spin × v)
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if (!this.spin.equals(Vec3.ZERO) && speed > 0.01) {
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const magnus = new Vec3();
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Vec3.cross(magnus, this.spin, this.v);
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magnus.multiplyScalar(this.magnusK);
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this.rb.applyForce(magnus);
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}
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// if (!this.spin.equals(Vec3.ZERO) && speed > 0.01) {
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// const magnus = new Vec3();
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// const vNorm = this.v.clone().normalize();
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// Vec3.cross(magnus, this.spin, vNorm);
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// magnus.multiplyScalar(this.magnusK * Math.sqrt(speed));
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// this.rb.applyForce(magnus);
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// }
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// 3. 风
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if (this.windStrength > 0.0001) {
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this.tmpF.set(this.wind).multiplyScalar(this.windStrength);
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this.rb.applyForce(this.tmpF);
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}
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// 4. 掉出场地自动重置
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if (this.node.worldPosition.y < this.resetY && this.spawnPoint) {
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this.resetBall();
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}
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}
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}
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