@arcgis/core
Version:
ArcGIS Maps SDK for JavaScript: A complete 2D and 3D mapping and data visualization API
6 lines (5 loc) • 2.02 kB
JavaScript
/*
All material copyright ESRI, All Rights Reserved, unless otherwise specified.
See https://js.arcgis.com/4.33/esri/copyright.txt for details.
*/
import{numericHash as t}from"../../../../../../core/string.js";import{FeatureTechniqueInstance as e}from"./TechniqueInstance.js";import{castInstanceId as s}from"./mesh/instanceIdUtils.js";class n{constructor(){this._instanceById=new Map}destroy(){this._instanceById.clear()}get size(){return this._instanceById.size}entries(){return this._instanceById.entries()}find(t){for(const e of this.values())if(e.techniqueRef.type===t)return e;return null}updateStart(t){t&&(this._instanceByIdNext=new Map,this._shaderCountByMesh=new Map,this._shaderIndices=new Map)}updateEnd(t){if(t){if(!this._instanceByIdNext)throw new Error("InternalError: Found updateEnd call without corresponding updateStart");for(const t of this._instanceById.keys())this._instanceByIdNext.has(t)||this._instanceById.delete(t);for(const[t,e]of this._instanceByIdNext.entries()){const s=this._instanceById.get(t);s?s.setInput(e.getInput()):this._instanceById.set(t,e)}this._instanceByIdNext=null,this._shaderCountByMesh=null,this._shaderIndices=null}}values(){return this._instanceById.values()}ensureInstance(n,i){let r;if("object"==typeof i&&"optionalAttributes"in i&&"uniforms"in i){const t=`${n.type}.${JSON.stringify(i.optionalAttributes)}`,e=t+`.${JSON.stringify(i.uniforms)}`;let s=0;null!=this._instanceByIdNext&&(this._shaderIndices.has(e)?s=this._shaderIndices.get(e):(s=this._shaderCountByMesh.get(t)??0,this._shaderCountByMesh.set(t,s+1),this._shaderIndices.set(e,s))),r=t+`.${s}`}else r=`${n.type}.${JSON.stringify(i)}`;const a=t(r);if(this._instanceByIdNext){const t=new e(s(a),n,i);return this._instanceByIdNext.set(a,t),t}if(!this._instanceById.has(a)){const t=new e(s(a),n,i);this._instanceById.set(a,t)}return this._instanceById.get(a)}getInstance(t){const e=this._instanceById.get(t);if(null==e)throw new Error(`InternalError: Unable to get instance for ${t}`);return e}}export{n as default};