[v3.8.6] Optimize code size for box2d-wasm backend.

cocos/physics-2d/box2d-wasm/joints/distance-joint.ts

@@ -28,6 +28,7 @@ import { B2Joint } from './joint-2d';
 import { DistanceJoint2D } from '../../framework';
 import { PHYSICS_2D_PTM_RATIO } from '../../framework/physics-types';
 
+/** @mangle */
 export class B2DistanceJoint extends B2Joint implements IDistanceJoint {
     setMaxLength (v: number): void {
         if (this._b2joint) {

cocos/physics-2d/box2d-wasm/joints/fixed-joint.ts

@@ -28,6 +28,7 @@ import { B2Joint } from './joint-2d';
 import { FixedJoint2D } from '../../framework';
 import { PHYSICS_2D_PTM_RATIO } from '../../framework/physics-types';
 
+/** @mangle */
 export class B2FixedJoint extends B2Joint implements IFixedJoint {
     setFrequency (v: number): void {
         if (this._b2joint) {

cocos/physics-2d/box2d-wasm/joints/hinge-joint.ts

@@ -29,6 +29,7 @@ import { B2Joint } from './joint-2d';
 import { PHYSICS_2D_PTM_RATIO } from '../../framework/physics-types';
 import { toRadian } from '../../../core';
 
+/** @mangle */
 export class B2HingeJoint extends B2Joint implements IHingeJoint {
     enableLimit (v: boolean): void {
         if (this._b2joint) {

cocos/physics-2d/box2d-wasm/joints/joint-2d.ts

@@ -22,12 +22,13 @@
  THE SOFTWARE.
 */
 
 import { B2, B2ObjectType, addImplPtrReference, addImplPtrReferenceWASM, getImplPtr, removeImplPtrReference, removeImplPtrReferenceWASM } from '../instantiated';
 import { IJoint2D } from '../../spec/i-physics-joint';
 import { Joint2D, PhysicsSystem2D, RigidBody2D } from '../../framework';
 import { B2PhysicsWorld } from '../physics-world';
 import { warn } from '../../../core';
 
+/** @mangle */
 export class B2Joint implements IJoint2D {
     get impl (): B2.Joint | null {
         return this._b2joint;

cocos/physics-2d/box2d-wasm/joints/mouse-joint.ts

@@ -35,6 +35,7 @@ import { find } from '../../../scene-graph';
 
 const tempB2Vec2 = { x: 0, y: 0 };//new b2.Vec2();
 
+/** @mangle */
 export class B2MouseJoint extends B2Joint implements IMouseJoint {
     _touchPoint = new Vec2();
     _isTouched = false;

cocos/physics-2d/box2d-wasm/joints/relative-joint.ts

@@ -31,6 +31,7 @@ import { Vec2, toRadian } from '../../../core';
 
 const tempB2Vec2 = { x: 0, y: 0 };//new b2.Vec2();
 
+/** @mangle */
 export class B2RelativeJoint extends B2Joint implements IRelativeJoint {
     setMaxForce (v: number): void {
         if (this._b2joint) {

cocos/physics-2d/box2d-wasm/joints/slider-joint.ts

@@ -29,6 +29,7 @@ import { SliderJoint2D } from '../../framework';
 import { PHYSICS_2D_PTM_RATIO } from '../../framework/physics-types';
 import { toRadian } from '../../../core';
 
+/** @mangle */
 export class B2SliderJoint extends B2Joint implements ISliderJoint {
     // limit
     enableLimit (v: boolean): void {

cocos/physics-2d/box2d-wasm/joints/spring-joint.ts

@@ -28,6 +28,7 @@ import { B2Joint } from './joint-2d';
 import { SpringJoint2D } from '../../framework';
 import { PHYSICS_2D_PTM_RATIO } from '../../framework/physics-types';
 
+/** @mangle */
 export class B2SpringJoint extends B2Joint implements ISpringJoint {
     setFrequency (v: number): void {
         if (this._b2joint) {

cocos/physics-2d/box2d-wasm/joints/wheel-joint.ts

@@ -29,6 +29,7 @@ import { B2Joint } from './joint-2d';
 import { PHYSICS_2D_PTM_RATIO } from '../../framework/physics-types';
 import { toRadian } from '../../../core';
 
+/** @mangle */
 export class B2WheelJoint extends B2Joint implements IWheelJoint {
     setFrequency (v: number): void {
         if (this._b2joint) {

cocos/physics-2d/box2d-wasm/physics-contact.ts

@@ -60,6 +60,7 @@ const impulse: IPhysics2DImpulse = {
     tangentImpulses: [] as number[],
 };
 
+/** @mangle */
 export class PhysicsContact implements IPhysics2DContact {
     static get (b2contact: number): PhysicsContact {
         let c = pools.pop();

cocos/physics-2d/box2d-wasm/physics-world.ts

@@ -50,6 +50,7 @@ const tempVec2_2 = new Vec2();
 
 const testResults: Collider2D[] = [];
 
+/** @mangle */
 export class B2PhysicsWorld implements IPhysicsWorld {
     protected _world: B2.World;
     protected _bodies: B2RigidBody2D[] = [];

cocos/physics-2d/box2d-wasm/platform/physics-contact-listener.ts

@@ -22,11 +22,16 @@
  THE SOFTWARE.
 */
 
+type BeginContactCallback = (contact: number) => void;
+type EndContactCallback = (contact: number) => void;
+type PreSolveCallback = (contact: number, oldManifold: number) => void;
+type PostSolveCallback = (contact: number, impulse: number) => void;
+
 export class PhysicsContactListener {
-    static _BeginContact: Function | null = null;
-    static _EndContact: Function | null = null;
-    static _PreSolve: Function | null = null;
-    static _PostSolve: Function | null = null;
+    static _BeginContact: BeginContactCallback | null = null;
+    static _EndContact: EndContactCallback | null = null;
+    static _PreSolve: PreSolveCallback | null = null;
+    static _PostSolve: PostSolveCallback | null = null;
 
     static BeginContact (contact: number): void {
         if (this._BeginContact) {

cocos/physics-2d/box2d-wasm/rigid-body.ts

@@ -39,6 +39,8 @@ import { B2Joint } from './joints/joint-2d';
 const tempVec3 = new Vec3();
 const tempVec2_1 = { x: 0, y: 0 };//new B2.Vec2(0, 0);
 const tempVec2_2 = { x: 0, y: 0 };
+
+/** @mangle */
 export class B2RigidBody2D implements IRigidBody2D {
     get impl (): B2.Body | null {
         return this._body;

cocos/physics-2d/box2d-wasm/shapes/box-shape-2d.ts

@@ -31,6 +31,7 @@ import { Vec2, Rect } from '../../../core';
 
 const tempAabb = new Rect();
 
+/** @mangle */
 export class B2BoxShape extends B2Shape2D implements IBoxShape {
     _worldPoints: Vec2[] = [new Vec2(), new Vec2(), new Vec2(), new Vec2()];
     get worldPoints (): Readonly<Vec2>[] {

cocos/physics-2d/box2d-wasm/shapes/circle-shape-2d.ts

@@ -29,6 +29,7 @@ import { PHYSICS_2D_PTM_RATIO } from '../../framework/physics-types';
 import { ICircleShape } from '../../spec/i-physics-shape';
 import { Vec2 } from '../../../core';
 
+/** @mangle */
 export class B2CircleShape extends B2Shape2D implements ICircleShape {
     get worldRadius (): number {
         return B2.CircleShapeGetRadius(this._shapes[0]) * PHYSICS_2D_PTM_RATIO;

cocos/physics-2d/box2d-wasm/shapes/polygon-shape-2d.ts

@@ -30,6 +30,7 @@ import { PHYSICS_2D_PTM_RATIO } from '../../framework/physics-types';
 import { IPolygonShape } from '../../spec/i-physics-shape';
 import { Vec2, warn } from '../../../core';
 
+/** @mangle */
 export class B2PolygonShape extends B2Shape2D implements IPolygonShape {
     _worldPoints: Vec2[] = [];
     get worldPoints (): Readonly<Vec2>[] {

cocos/physics-2d/box2d-wasm/shapes/shape-2d.ts

@@ -46,6 +46,7 @@ function getFilter (shape: B2Shape2D): B2.Filter {
     return tempFilter;
 }
 
+/** @mangle */
 export class B2Shape2D implements IBaseShape {
     protected _shapes: number[] = [];
     protected _fixtures: number[] = [];//B2.Fixture ptr