playcanvas/build/playcanvas/src/scene/skin-instance-cache.js

PlayCanvas WebGL game engine

import { RefCountedObject } from '../core/ref-counted-object.js';
import { SkinInstance } from './skin-instance.js';

class SkinInstanceCachedObject extends RefCountedObject {
		constructor(skin, skinInstance){
				super();
				this.skin = skin;
				this.skinInstance = skinInstance;
		}
}
class SkinInstanceCache {
		static{
				this._skinInstanceCache = new Map();
		}
		static createCachedSkinInstance(skin, rootBone, entity) {
				let skinInst = SkinInstanceCache.getCachedSkinInstance(skin, rootBone);
				if (!skinInst) {
						skinInst = new SkinInstance(skin);
						skinInst.resolve(rootBone, entity);
						SkinInstanceCache.addCachedSkinInstance(skin, rootBone, skinInst);
				}
				return skinInst;
		}
		static getCachedSkinInstance(skin, rootBone) {
				let skinInstance = null;
				const cachedObjArray = SkinInstanceCache._skinInstanceCache.get(rootBone);
				if (cachedObjArray) {
						const cachedObj = cachedObjArray.find((element)=>element.skin === skin);
						if (cachedObj) {
								cachedObj.incRefCount();
								skinInstance = cachedObj.skinInstance;
						}
				}
				return skinInstance;
		}
		static addCachedSkinInstance(skin, rootBone, skinInstance) {
				let cachedObjArray = SkinInstanceCache._skinInstanceCache.get(rootBone);
				if (!cachedObjArray) {
						cachedObjArray = [];
						SkinInstanceCache._skinInstanceCache.set(rootBone, cachedObjArray);
				}
				let cachedObj = cachedObjArray.find((element)=>element.skin === skin);
				if (!cachedObj) {
						cachedObj = new SkinInstanceCachedObject(skin, skinInstance);
						cachedObjArray.push(cachedObj);
				}
				cachedObj.incRefCount();
		}
		static removeCachedSkinInstance(skinInstance) {
				if (skinInstance) {
						const rootBone = skinInstance.rootBone;
						if (rootBone) {
								const cachedObjArray = SkinInstanceCache._skinInstanceCache.get(rootBone);
								if (cachedObjArray) {
										const cachedObjIndex = cachedObjArray.findIndex((element)=>element.skinInstance === skinInstance);
										if (cachedObjIndex >= 0) {
												const cachedObj = cachedObjArray[cachedObjIndex];
												cachedObj.decRefCount();
												if (cachedObj.refCount === 0) {
														cachedObjArray.splice(cachedObjIndex, 1);
														if (!cachedObjArray.length) {
																SkinInstanceCache._skinInstanceCache.delete(rootBone);
														}
														if (skinInstance) {
																skinInstance.destroy();
																cachedObj.skinInstance = null;
														}
												}
										}
								}
						}
				}
		}
}

export { SkinInstanceCache };