/*
 * @Author: your name
 * @Date: 2021-09-22 10:36:41
 * @LastEditTime: 2021-09-26 20:37:09
 * @LastEditors: Please set LastEditors
 * @Description: In User Settings Edit
 * @FilePath: \zombie-food\assets\script\manager\PhysicsManager.js
 */
/**
 * 物理引擎管理组件
 */

cc.Class({
    extends: Script,

    properties: {
        active: {
            default: true,
            tooltip: '是否启用物理引擎',
        },
        aabb: {
            default: true,
            tooltip: '是否显示包围盒',
        },
        pair: {
            default: true,
        },
        centerOfMass: {
            default: true,
            tooltip: '是否显示中心点'
        },
        joint: {
            default: true,
            tooltip: '是否显示关节连接线'
        },
        shape: {
            default: true,
            tooltip: '是否填充形状'
        },
        gravity: {
            default: cc.v2(0, -960),
            tooltip: '重力'
        }
    },

    onLoad() {
        window.PhysicsManager = this;

        // 物理步长，默认 FIXED_TIME_STEP 是 1/60
        cc.PhysicsManager.FIXED_TIME_STEP = 1 / 2;
        // 位移计算迭代次数 迭代的次数越多，解决刚体重叠的速度越快
        cc.PhysicsManager.POSITION_ITERATIONS = 8;
        // 速度计算迭代次数 迭代的次数越多，碰撞传导的速度越快
        cc.PhysicsManager.VELOCITY_ITERATIONS = 2;
    },

    open() {
        this.active = true;
        this.onEnable();
    },

    close() {
        this.active = false;
        this.onDisable();
    },

    onEnable() {
        //开启或关闭物理系统
        let physicsManager = cc.director.getPhysicsManager();
       
        if (physicsManager.enabled && this.active) {
            cc.warn('The physical system is enabled！');
        }
        physicsManager.enabled = this.active;
        // Get the collision manager.
        let manager = cc.director.getCollisionManager();

        // Enabled the colider manager.
        manager.enabled = true;

        if (!this.active) {
            return;
        }
        //设置物理系统的重力属性
        physicsManager.gravity = this.gravity;

        //设置调试标志
        let drawBits = cc.PhysicsManager.DrawBits;
        if (CC_PREVIEW) {
            physicsManager.debugDrawFlags =
                (this.aabb && drawBits.e_aabbBit) |
                (this.pair && drawBits.e_pairBit) |
                (this.centerOfMass && drawBits.e_centerOfMassBit) |
                (this.joint && drawBits.e_jointBit) |
                (this.shape && drawBits.e_shapeBit);
        } else {
            physicsManager.debugDrawFlags = 0;
        }
    },

    onDisable() {
        let physicsManager = cc.director.getPhysicsManager();
        physicsManager.debugDrawFlags = 0;
        physicsManager.enabled = false;
    }
});