@arcgis/core/views/2d/engine/webgl/meshing/Mesh.js

ArcGIS Maps SDK for JavaScript: A complete 2D and 3D mapping and data visualization API

/*
All material copyright ESRI, All Rights Reserved, unless otherwise specified.
See https://js.arcgis.com/4.32/esri/copyright.txt for details.
*/
import{BufferObject as e}from"../../../../webgl/BufferObject.js";import"../../../../webgl/FramebufferObject.js";import"../../../../../core/has.js";import"../../../../webgl/checkWebGLError.js";import{Usage as r}from"../../../../webgl/enums.js";import"../../../../webgl/GLObjectType.js";import"../../../../webgl/Texture.js";import{VertexArrayObject as t}from"../../../../webgl/VertexArrayObject.js";import{dataSizeInBytes as s}from"./definitions.js";class o{constructor(t,s){this._boundPart=null,this.vertexBuffers=new Map,this.indexBuffers=new Map,this.groups=[];for(const o in s.vertex){const{data:i,attributes:n}=s.vertex[o],f=e.createVertex(t,r.STATIC_DRAW,i);this.vertexBuffers.set(o,{buffer:f,attributes:n})}for(const o in s.index){const{data:i}=s.index[o],n=e.createIndex(t,r.STATIC_DRAW,i);this.indexBuffers.set(o,{buffer:n})}for(const e of s.groups)this.groups.push({...e,vertexArrays:new Map});this.parts=s.parts}bind(e,r,s){this._boundPart=s;const{group:o}=this.parts[this._boundPart],i=this.groups[o];if(!i)throw new Error(`Missing group ${o}.`);let n=i.vertexArrays.get(r.stringHash);if(!n){const s=new Set(r.locations.keys()),o=i.index?this.indexBuffers.get(i.index)?.buffer:null,f=new Map,u=new Map;for(const[e,{buffer:r,attributes:t}]of this.vertexBuffers){const o=t.filter((e=>s.has(e.name)));o.length>0&&(f.set(e,o),u.set(e,r))}n=new t(e,r.locations,f,u,o),i.vertexArrays.set(r.stringHash,n)}e.bindVAO(n)}draw(e){if(null==this._boundPart)throw new Error("Mesh.bind() has not been called.");const{start:r,count:t}=this.parts[this._boundPart],{group:o}=this.parts[this._boundPart],{primitive:i,index:n}=this.groups[o];if(n){const o=this.indexBuffers.get(n);if(!o)throw new Error(`Missing index buffer "${n}".`);const{indexType:f}=o.buffer;if(!f)throw new Error("Buffer type error.");e.drawElements(i,t,f,r*s[f])}else e.drawArrays(i,r,t)}unbind(e){this._boundPart=null,e.bindVAO(null)}destroy(){for(const{vertexArrays:e}of this.groups)for(const[r,t]of e)t.disposeVAOOnly();for(const{buffer:e}of this.vertexBuffers.values())e.dispose();for(const{buffer:e}of this.indexBuffers.values())e.dispose()}}export{o as Mesh};