新增角色控制器
This commit is contained in:
yhh
588
source/src/ECS/Components/Physics/CharacterController.ts
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588
source/src/ECS/Components/Physics/CharacterController.ts
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@@ -0,0 +1,588 @@
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module es {
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class CharacterRaycastOrigins {
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public topLeft: Vector2;
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public bottomRight: Vector2;
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public bottomLeft: Vector2;
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public constructor() {
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this.topLeft = Vector2.zero;
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this.bottomRight = Vector2.zero;
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this.bottomLeft = Vector2.zero;
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}
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}
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class CharacterCollisionState2D {
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public right: boolean = false;
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public left: boolean = false;
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public above: boolean = false;
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public below: boolean = false;
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public becameGroundedThisFrame: boolean = false;
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public wasGroundedLastFrame: boolean = false;
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public movingDownSlope: boolean = false;
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public slopeAngle: number = 0;
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public hasCollision(): boolean {
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return this.below || this.right || this.left || this.above;
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}
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public reset(): void {
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this.right = this.left = false;
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this.above = this.below = false;
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this.becameGroundedThisFrame = this.movingDownSlope = false;
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this.slopeAngle = 0;
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}
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public toString(): string {
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return `[CharacterCollisionState2D] r: ${this.right}, l: ${this.left}, a: ${this.above}, b: ${this.below}, movingDownSlope: ${this.movingDownSlope}, angle: ${this.slopeAngle}, wasGroundedLastFrame: ${this.wasGroundedLastFrame}, becameGroundedThisFrame: ${this.becameGroundedThisFrame}`;
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}
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}
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export class CharacterController implements ITriggerListener {
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public onControllerCollidedEvent: ObservableT<RaycastHit>;
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public onTriggerEnterEvent: ObservableT<Collider>;
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public onTriggerExitEvent: ObservableT<Collider>;
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/**
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* 如果为 true，则在垂直移动单帧时将忽略平台的一种方式
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*/
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public ignoreOneWayPlatformsTime: number;
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public supportSlopedOneWayPlatforms: boolean;
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public ignoredColliders: Set<Collider> = new Set();
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/**
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* 定义距离碰撞射线的边缘有多远。
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* 如果使用 0 范围进行投射，则通常会导致不需要的光线击中（例如，直接从表面水平投射的足部碰撞器可能会导致击中）
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*/
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public get skinWidth() {
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return this._skinWidth;
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}
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public set skinWidth(value: number) {
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this._skinWidth = value;
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this.recalculateDistanceBetweenRays();
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}
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/**
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* CC2D 可以爬升的最大坡度角
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*/
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public slopeLimit: number = 30;
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/**
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* 构成跳跃的帧之间垂直运动变化的阈值
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*/
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public jumpingThreshold: number = -7;
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/**
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* 基于斜率乘以速度的曲线（负 = 下坡和正 = 上坡）
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*/
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public slopeSpeedMultiplier: AnimCurve;
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public totalHorizontalRays: number = 5;
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public totalVerticalRays: number = 3;
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public collisionState: CharacterCollisionState2D = new CharacterCollisionState2D();
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public velocity: Vector2 = new Vector2(0, 0);
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public get isGrounded(): boolean {
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return this.collisionState.below;
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}
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public get raycastHitsThisFrame(): RaycastHit[] {
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return this._raycastHitsThisFrame;
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}
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public constructor(
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player: Entity,
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skinWidth?: number,
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platformMask: number = -1,
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onewayPlatformMask: number = -1,
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triggerMask: number = -1
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) {
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this.onTriggerEnterEvent = new ObservableT();
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this.onTriggerExitEvent = new ObservableT();
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this.onControllerCollidedEvent = new ObservableT();
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this.platformMask = platformMask;
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this.oneWayPlatformMask = onewayPlatformMask;
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this.triggerMask = triggerMask;
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// 将我们的单向平台添加到我们的普通平台掩码中，以便我们可以从上方降落
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this.platformMask |= this.oneWayPlatformMask;
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this._player = player;
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let collider = null;
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for (let i = 0; i < this._player.components.buffer.length; i++) {
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let component = this._player.components.buffer[i];
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if (component instanceof Collider) {
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collider = component;
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break;
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}
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}
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collider.isTrigger = false;
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if (collider instanceof BoxCollider) {
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this._collider = collider as BoxCollider;
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} else {
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throw new Error('player collider must be box');
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}
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// 在这里，我们触发了具有主体的 setter 的属性
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this.skinWidth = skinWidth || collider.width * 0.05;
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this._slopeLimitTangent = Math.tan(75 * MathHelper.Deg2Rad);
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this._triggerHelper = new ColliderTriggerHelper(this._player);
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// 我们想设置我们的 CC2D 忽略所有碰撞层，除了我们的 triggerMask
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for (let i = 0; i < 32; i++) {
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// 查看我们的 triggerMask 是否包含此层，如果不包含则忽略它
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if ((this.triggerMask & (1 << i)) === 0) {
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Flags.unsetFlag(this._collider.collidesWithLayers, i);
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}
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}
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}
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public onTriggerEnter(other: Collider, local: Collider): void {
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this.onTriggerEnterEvent.notify(other);
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}
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public onTriggerExit(other: Collider, local: Collider): void {
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this.onTriggerExitEvent.notify(other);
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}
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/**
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* 尝试将角色移动到位置 + deltaMovement。 任何挡路的碰撞器都会在遇到时导致运动停止
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* @param deltaMovement
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* @param deltaTime
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*/
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public move(deltaMovement: Vector2, deltaTime: number): void {
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this.collisionState.wasGroundedLastFrame = this.collisionState.below;
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this.collisionState.reset();
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this._raycastHitsThisFrame = [];
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this._isGoingUpSlope = false;
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this.primeRaycastOrigins();
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if (deltaMovement.y > 0 && this.collisionState.wasGroundedLastFrame) {
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deltaMovement = this.handleVerticalSlope(deltaMovement);
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}
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if (deltaMovement.x !== 0) {
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deltaMovement = this.moveHorizontally(deltaMovement);
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}
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if (deltaMovement.y !== 0) {
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deltaMovement = this.moveVertically(deltaMovement);
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}
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this._player.setPosition(
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this._player.position.x + deltaMovement.x,
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this._player.position.y + deltaMovement.y
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);
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if (deltaTime > 0) {
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this.velocity.x = deltaMovement.x / deltaTime;
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this.velocity.y = deltaMovement.y / deltaTime;
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}
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if (
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!this.collisionState.wasGroundedLastFrame &&
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this.collisionState.below
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) {
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this.collisionState.becameGroundedThisFrame = true;
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}
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if (this._isGoingUpSlope) {
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this.velocity.y = 0;
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}
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if (!this._isWarpingToGround) {
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this._triggerHelper.update();
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}
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for (let i = 0; i < this._raycastHitsThisFrame.length; i++) {
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this.onControllerCollidedEvent.notify(this._raycastHitsThisFrame[i]);
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}
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if (this.ignoreOneWayPlatformsTime > 0) {
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this.ignoreOneWayPlatformsTime -= deltaTime;
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}
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}
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/**
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* 直接向下移动直到接地
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* @param maxDistance
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*/
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public warpToGrounded(maxDistance: number = 1000): void {
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this.ignoreOneWayPlatformsTime = 0;
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this._isWarpingToGround = true;
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let delta = 0;
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do {
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delta += 1;
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this.move(new Vector2(0, 1), 0.02);
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if (delta > maxDistance) {
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break;
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}
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} while (!this.isGrounded);
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this._isWarpingToGround = false;
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}
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/**
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* 这应该在您必须在运行时修改 BoxCollider2D 的任何时候调用。
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* 它将重新计算用于碰撞检测的光线之间的距离。
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* 它也用于 skinWidth setter，以防在运行时更改。
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*/
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public recalculateDistanceBetweenRays(): void {
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const colliderUsableHeight =
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this._collider.height * Math.abs(this._player.scale.y) -
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2 * this._skinWidth;
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this._verticalDistanceBetweenRays =
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colliderUsableHeight / (this.totalHorizontalRays - 1);
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const colliderUsableWidth =
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this._collider.width * Math.abs(this._player.scale.x) -
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2 * this._skinWidth;
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this._horizontalDistanceBetweenRays =
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colliderUsableWidth / (this.totalVerticalRays - 1);
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}
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/**
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* 将 raycastOrigins 重置为由 skinWidth 插入的框碰撞器的当前范围。
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* 插入它是为了避免从直接接触另一个碰撞器的位置投射光线，从而导致不稳定的法线数据。
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*/
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private primeRaycastOrigins(): void {
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const rect = this._collider.bounds;
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this._raycastOrigins.topLeft = new Vector2(
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rect.x + this._skinWidth,
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rect.y + this._skinWidth
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);
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this._raycastOrigins.bottomRight = new Vector2(
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rect.right - this._skinWidth,
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rect.bottom - this._skinWidth
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);
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this._raycastOrigins.bottomLeft = new Vector2(
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rect.x + this._skinWidth,
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rect.bottom - this._skinWidth
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);
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}
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/**
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* 我们必须在这方面使用一些技巧。
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* 光线必须从我们的碰撞器（skinWidth）内部的一小段距离投射，以避免零距离光线会得到错误的法线。
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* 由于这个小偏移，我们必须增加光线距离 skinWidth 然后记住在实际移动玩家之前从 deltaMovement 中删除 skinWidth
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* @param deltaMovement
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* @returns
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*/
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private moveHorizontally(deltaMovement: Vector2): Vector2 {
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const isGoingRight = deltaMovement.x > 0;
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let rayDistance =
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Math.abs(deltaMovement.x) +
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this._skinWidth * this.rayOriginSkinMutiplier;
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const rayDirection: Vector2 = isGoingRight ? Vector2.right : Vector2.left;
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const initialRayOriginY = this._raycastOrigins.bottomLeft.y;
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const initialRayOriginX = isGoingRight
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? this._raycastOrigins.bottomRight.x -
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this._skinWidth * (this.rayOriginSkinMutiplier - 1)
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: this._raycastOrigins.bottomLeft.x +
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this._skinWidth * (this.rayOriginSkinMutiplier - 1);
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for (let i = 0; i < this.totalHorizontalRays; i++) {
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const ray = new Vector2(
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initialRayOriginX,
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initialRayOriginY - i * this._verticalDistanceBetweenRays
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);
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// if we are grounded we will include oneWayPlatforms
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// only on the first ray (the bottom one). this will allow us to
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// walk up sloped oneWayPlatforms
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if (
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i === 0 &&
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this.supportSlopedOneWayPlatforms &&
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this.collisionState.wasGroundedLastFrame
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) {
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this._raycastHit = Physics.linecastIgnoreCollider(
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ray,
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ray.add(rayDirection.multiplyScaler(rayDistance)),
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this.platformMask,
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this.ignoredColliders
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);
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} else {
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this._raycastHit = Physics.linecastIgnoreCollider(
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ray,
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ray.add(rayDirection.multiplyScaler(rayDistance)),
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this.platformMask & ~this.oneWayPlatformMask,
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this.ignoredColliders
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);
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}
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if (this._raycastHit.collider) {
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if (
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i === 0 &&
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this.handleHorizontalSlope(
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deltaMovement,
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Vector2.unsignedAngle(this._raycastHit.normal, Vector2.up)
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)
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) {
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this._raycastHitsThisFrame.push(this._raycastHit);
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break;
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}
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deltaMovement.x = this._raycastHit.point.x - ray.x;
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rayDistance = Math.abs(deltaMovement.x);
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if (isGoingRight) {
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deltaMovement.x -= this._skinWidth * this.rayOriginSkinMutiplier;
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this.collisionState.right = true;
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} else {
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deltaMovement.x += this._skinWidth * this.rayOriginSkinMutiplier;
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this.collisionState.left = true;
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}
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this._raycastHitsThisFrame.push(this._raycastHit);
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if (
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rayDistance <
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this._skinWidth * this.rayOriginSkinMutiplier +
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this.kSkinWidthFloatFudgeFactor
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) {
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break;
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}
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}
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}
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return deltaMovement;
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}
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private moveVertically(deltaMovement: Vector2): Vector2 {
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const isGoingUp = deltaMovement.y < 0;
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let rayDistance =
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Math.abs(deltaMovement.y) +
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this._skinWidth * this.rayOriginSkinMutiplier;
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const rayDirection = isGoingUp ? Vector2.up : Vector2.down;
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let initialRayOriginX = this._raycastOrigins.topLeft.x;
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const initialRayOriginY = isGoingUp
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? this._raycastOrigins.topLeft.y +
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this._skinWidth * (this.rayOriginSkinMutiplier - 1)
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: this._raycastOrigins.bottomLeft.y -
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this._skinWidth * (this.rayOriginSkinMutiplier - 1);
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initialRayOriginX += deltaMovement.x;
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let mask = this.platformMask;
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if (isGoingUp || this.ignoreOneWayPlatformsTime > 0) {
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mask &= ~this.oneWayPlatformMask;
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}
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for (let i = 0; i < this.totalVerticalRays; i++) {
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const rayStart = new Vector2(
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initialRayOriginX + i * this._horizontalDistanceBetweenRays,
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initialRayOriginY
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);
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this._raycastHit = Physics.linecastIgnoreCollider(
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rayStart,
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rayStart.add(rayDirection.multiplyScaler(rayDistance)),
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mask,
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this.ignoredColliders
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);
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if (this._raycastHit.collider) {
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deltaMovement.y = this._raycastHit.point.y - rayStart.y;
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rayDistance = Math.abs(deltaMovement.y);
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if (isGoingUp) {
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deltaMovement.y += this._skinWidth * this.rayOriginSkinMutiplier;
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this.collisionState.above = true;
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} else {
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deltaMovement.y -= this._skinWidth * this.rayOriginSkinMutiplier;
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this.collisionState.below = true;
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}
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this._raycastHitsThisFrame.push(this._raycastHit);
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if (!isGoingUp && deltaMovement.y < -0.00001) {
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this._isGoingUpSlope = true;
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}
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if (
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rayDistance <
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this._skinWidth * this.rayOriginSkinMutiplier +
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this.kSkinWidthFloatFudgeFactor
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) {
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break;
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}
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}
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}
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return deltaMovement;
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}
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/**
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* 检查 BoxCollider2D 下的中心点是否存在坡度。
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* 如果找到一个，则调整 deltaMovement 以便玩家保持接地，并考虑slopeSpeedModifier 以加快移动速度。
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* @param deltaMovement
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* @returns
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*/
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private handleVerticalSlope(deltaMovement: Vector2): Vector2 {
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const centerOfCollider =
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(this._raycastOrigins.bottomLeft.x +
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this._raycastOrigins.bottomRight.x) *
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0.5;
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const rayDirection = Vector2.down;
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const slopeCheckRayDistance =
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this._slopeLimitTangent *
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(this._raycastOrigins.bottomRight.x - centerOfCollider);
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const slopeRay = new Vector2(
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centerOfCollider,
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this._raycastOrigins.bottomLeft.y
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);
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this._raycastHit = Physics.linecastIgnoreCollider(
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slopeRay,
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slopeRay.add(rayDirection.multiplyScaler(slopeCheckRayDistance)),
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this.platformMask,
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this.ignoredColliders
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);
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if (this._raycastHit.collider) {
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const angle = Vector2.unsignedAngle(this._raycastHit.normal, Vector2.up);
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if (angle === 0) {
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return deltaMovement;
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}
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const isMovingDownSlope =
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Math.sign(this._raycastHit.normal.x) === Math.sign(deltaMovement.x);
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if (isMovingDownSlope) {
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const slopeModifier = this.slopeSpeedMultiplier
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? this.slopeSpeedMultiplier.lerp(-angle)
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: 1;
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deltaMovement.y +=
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this._raycastHit.point.y - slopeRay.y - this.skinWidth;
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deltaMovement.x *= slopeModifier;
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this.collisionState.movingDownSlope = true;
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this.collisionState.slopeAngle = angle;
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}
|
||||
}
|
||||
|
||||
return deltaMovement;
|
||||
}
|
||||
|
||||
/**
|
||||
* 如果我们要上坡，则处理调整 deltaMovement
|
||||
* @param deltaMovement
|
||||
* @param angle
|
||||
* @returns
|
||||
*/
|
||||
private handleHorizontalSlope(
|
||||
deltaMovement: Vector2,
|
||||
angle: number
|
||||
): boolean {
|
||||
if (Math.round(angle) === 90) {
|
||||
return false;
|
||||
}
|
||||
|
||||
if (angle < this.slopeLimit) {
|
||||
if (deltaMovement.y > this.jumpingThreshold) {
|
||||
const slopeModifier = this.slopeSpeedMultiplier
|
||||
? this.slopeSpeedMultiplier.lerp(angle)
|
||||
: 1;
|
||||
deltaMovement.x *= slopeModifier;
|
||||
|
||||
deltaMovement.y = Math.abs(
|
||||
Math.tan(angle * MathHelper.Deg2Rad) * deltaMovement.x
|
||||
);
|
||||
const isGoingRight = deltaMovement.x > 0;
|
||||
|
||||
const ray = isGoingRight
|
||||
? this._raycastOrigins.bottomRight
|
||||
: this._raycastOrigins.bottomLeft;
|
||||
let raycastHit = null;
|
||||
if (
|
||||
this.supportSlopedOneWayPlatforms &&
|
||||
this.collisionState.wasGroundedLastFrame
|
||||
) {
|
||||
raycastHit = Physics.linecastIgnoreCollider(
|
||||
ray,
|
||||
ray.add(deltaMovement),
|
||||
this.platformMask,
|
||||
this.ignoredColliders
|
||||
);
|
||||
} else {
|
||||
raycastHit = Physics.linecastIgnoreCollider(
|
||||
ray,
|
||||
ray.add(deltaMovement),
|
||||
this.platformMask & ~this.oneWayPlatformMask,
|
||||
this.ignoredColliders
|
||||
);
|
||||
}
|
||||
|
||||
if (raycastHit.collider) {
|
||||
deltaMovement.x = raycastHit.point.x - ray.x;
|
||||
deltaMovement.y = raycastHit.point.y - ray.y;
|
||||
if (isGoingRight) {
|
||||
deltaMovement.x -= this._skinWidth;
|
||||
} else {
|
||||
deltaMovement.x += this._skinWidth;
|
||||
}
|
||||
}
|
||||
|
||||
this._isGoingUpSlope = true;
|
||||
this.collisionState.below = true;
|
||||
}
|
||||
} else {
|
||||
deltaMovement.x = 0;
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
|
||||
private _player: Entity;
|
||||
private _collider: BoxCollider;
|
||||
private _skinWidth: number = 0.02;
|
||||
private _triggerHelper: ColliderTriggerHelper;
|
||||
|
||||
/**
|
||||
* 这用于计算为检查坡度而投射的向下光线。
|
||||
* 我们使用有点随意的值 75 度来计算检查斜率的射线的长度。
|
||||
*/
|
||||
private _slopeLimitTangent: number;
|
||||
|
||||
private readonly kSkinWidthFloatFudgeFactor: number = 0.001;
|
||||
|
||||
/**
|
||||
* 我们的光线投射原点角的支架（TR、TL、BR、BL）
|
||||
*/
|
||||
private _raycastOrigins: CharacterRaycastOrigins = new CharacterRaycastOrigins();
|
||||
|
||||
/**
|
||||
* 存储我们在移动过程中命中的光线投射
|
||||
*/
|
||||
private _raycastHit: RaycastHit = new RaycastHit();
|
||||
|
||||
/**
|
||||
* 存储此帧发生的任何光线投射命中。
|
||||
* 我们必须存储它们，以防我们遇到水平和垂直移动的碰撞，以便我们可以在设置所有碰撞状态后发送事件
|
||||
*/
|
||||
private _raycastHitsThisFrame: RaycastHit[];
|
||||
|
||||
// 水平/垂直移动数据
|
||||
private _verticalDistanceBetweenRays: number;
|
||||
private _horizontalDistanceBetweenRays: number;
|
||||
|
||||
/**
|
||||
* 我们使用这个标志来标记我们正在爬坡的情况，我们修改了 delta.y 以允许爬升。
|
||||
* 原因是，如果我们到达斜坡的尽头，我们可以进行调整以保持接地
|
||||
*/
|
||||
private _isGoingUpSlope: boolean = false;
|
||||
|
||||
private _isWarpingToGround: boolean = true;
|
||||
|
||||
private platformMask: number = -1;
|
||||
private triggerMask: number = -1;
|
||||
private oneWayPlatformMask: number = -1;
|
||||
|
||||
private readonly rayOriginSkinMutiplier = 4;
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user