Alien_Sniper/assets/Ragdoll/Ragdoll.ts

import { _decorator, Collider, Component, Material, Node, PhysicsGroup, PhysicsSystem, RigidBody, SkinnedMeshRenderer, SphereCollider } from 'cc';
import { RagdollBone } from './RagdollBone';
import { RagdollConstraint } from './RagdollConstraint';
import { GameController } from '../scripts/GameController';
import { AudioMgr } from '../scripts/framework/audio/AudioMgr';
import { AssetController } from '../scripts/AssetController';
const { ccclass, property } = _decorator;

@ccclass('Ragdoll')
export class Ragdoll extends Component {
    @property(Node)
    rootNode: Node = null;

    @property(Node)
    centerNode: Node = null;

    @property(SkinnedMeshRenderer)
    renderer: SkinnedMeshRenderer = null;


    @property(Material)
    siwang: Material; // 新的材质

    private realBones: Array<Node> = [];
    private simuBones: Array<Node> = [];

    private simuBoneJointArr: Array<CANNON.ConeTwistConstraint> = [];

    private world: any;

    private isEnabled: boolean = false;


    start() {
        this.world = PhysicsSystem.instance.physicsWorld.impl;
        this.initRagdoll()
    }

    private initRagdoll() {
        // 压入真实骨骼
        this.getAllRealBones(this.rootNode)

        // 创建模拟骨骼
        this.createSimuBones();

        // 创建模拟骨骼的关节
        this.createSimuBoneJoints();
    }

    createSimuBones() {
        for (let boneNode of this.realBones) {
            let node = new Node
            node.addComponent(SphereCollider).radius = 0.2 * node.worldScale.x
            node.addComponent(RigidBody)

            this.node.addChild(node)
            this.simuBones.push(node)

            this.syncPositionAndRotation(node, boneNode)
            // 同步之后将位置赋给初始位置
            let ragdollBone = boneNode.getComponent(RagdollBone)
            ragdollBone.simuNode = node
            ragdollBone.initPos = boneNode.getPosition();
            ragdollBone.initRot = boneNode.getRotation();
        }

        this.scheduleOnce(() => {
            for (let bone of this.simuBones) {
                let body = bone.getComponent(RigidBody)
                body.sleep()
            }
        }, 0)
    }

    createSimuBoneJoints() {
        for (let boneNode of this.realBones) {
            const joint = boneNode.getComponent(RagdollConstraint)
            if (joint) {
                const simuNodeA = boneNode.getComponent(RagdollBone).simuNode
                const simuNodeB = joint.connectedBone.getComponent(RagdollBone).simuNode
                const bodyA = simuNodeA.getComponent(RigidBody).body.impl
                const bodyB = simuNodeB.getComponent(RigidBody).body.impl

                let spineJoint = new CANNON.ConeTwistConstraint(bodyA, bodyB, {
                    pivotA: new CANNON.Vec3(joint.pivotA.x, joint.pivotA.y, joint.pivotA.z),
                    pivotB: new CANNON.Vec3(joint.pivotB.x, joint.pivotB.y, joint.pivotB.z),
                    axisA: new CANNON.Vec3(joint.axisA.x, joint.axisA.y, joint.axisA.z),
                    axisB: new CANNON.Vec3(joint.axisB.x, joint.axisB.y, joint.axisB.z),
                    angle: joint.angle,
                    twistAngle: joint.twistAngle
                })
                this.world.addConstraint(spineJoint)
                this.simuBoneJointArr.push(spineJoint)
            }
        }
    }

    getAllRealBones(node: Node) {
        let bones = node.children;
        for (let boneNode of bones) {
            const bone = boneNode.getComponent(RagdollBone)
            if (bone) {
                this.realBones.push(boneNode)
                bone.ragdoll = this
            }
            this.getAllRealBones(boneNode)
        }
    }

    lateUpdate(deltaTime: number) {
        if (this.isEnabled) {
            this.updateBones()
        }
    }

    syncPositionAndRotation(nodeA: Node, nodeB: Node) {
        nodeA.setWorldPosition(nodeB.worldPosition)
        nodeA.setWorldRotation(nodeB.worldRotation)
    }

    // 将模拟骨骼的位置和转角同步到真实骨骼
    private updateBones() {
        for (let i = 0; i < this.realBones.length; i++) {
            this.syncPositionAndRotation(this.realBones[i], this.simuBones[i])
        }
    }

    getEnabled() {
        return this.isEnabled;
    }

    setEnabled(isEnabled: boolean) {
        if (isEnabled && this.isDie) return
        isEnabled ? this.enableRagdoll() : this.disableRagdoll();
        AudioMgr.inst.playOneShot(AssetController.instance.die)
    }

    isDie: boolean = false
    enableRagdoll() {
        this.isDie = true
        GameController.getInstance().curLevel.onEnemyDie(this)
        // this.renderer.setMaterialInstance(this.siwang, 0)

        this.renderer.material = this.siwang

        // 将模拟骨骼的位置和真实骨骼同步
        for (let bone of this.realBones) {
            let ragdollBone = bone.getComponent(RagdollBone)
            this.syncPositionAndRotation(ragdollBone.simuNode, bone)
            let collider = ragdollBone.getComponent(Collider)
            if (collider)
                collider.enabled = false
        }

        for (let bone of this.simuBones) {
            let body = bone.getComponent(RigidBody)
            body.wakeUp();
        }

        // 将关节添加至物理世界
        for (let joint of this.simuBoneJointArr) {
            this.world.addConstraint(joint);
        }

        this.isEnabled = true;
    }

    disableRagdoll() {
        // 将真实骨骼移动至初始位置
        for (let bone of this.realBones) {
            let ragdollBone = bone.getComponent(RagdollBone);
            bone.setPosition(ragdollBone.initPos);
            bone.setRotation(ragdollBone.initRot);
        }

        for (let bone of this.simuBones) {
            let body = bone.getComponent(RigidBody)
            body.sleep();
        }

        // 从物理世界中移除关节
        for (let joint of this.simuBoneJointArr) {
            this.world.removeConstraint(joint);
        }

        this.isEnabled = false;
    }
}