@arcgis/core
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ArcGIS Maps SDK for JavaScript: A complete 2D and 3D mapping and data visualization API
6 lines (5 loc) • 2.24 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 t from"../../../../../../../core/RandomLCG.js";import{tileSize as e}from"../../../definitions.js";import{SimpleMesh as s}from"../../../meshing/SimpleMesh.js";import{TextureSamplingMode as o,TextureWrapMode as r,SizedDepthStencilFormat as i,DataType as n,PrimitiveType as h,PixelType as d}from"../../../../../../webgl/enums.js";import{FramebufferObject as u}from"../../../../../../webgl/FramebufferObject.js";import{Renderbuffer as l}from"../../../../../../webgl/Renderbuffer.js";import{RenderbufferDescriptor as _}from"../../../../../../webgl/RenderbufferDescriptor.js";import{Texture as T}from"../../../../../../webgl/Texture.js";import{TextureDescriptor as m}from"../../../../../../webgl/TextureDescriptor.js";const p={pos:{count:2,type:n.UNSIGNED_SHORT}};class f{constructor(){this._dotTextureSize=0,this._dotTextures=null,this._dotMesh=null}destroy(){this._disposeTextures(),this._dotFBO&&this._dotFBO.dispose(),this._dotMesh&&this._dotMesh.destroy()}getFBO(t){if(null==this._dotFBO){const s=e,n=e,h=new m(s,n);h.samplingMode=o.NEAREST,h.wrapMode=r.CLAMP_TO_EDGE;const d=new l(t,new _(i.DEPTH24_STENCIL8,s,n));this._dotFBO=new u(t,h,d)}return this._dotFBO}getDotDensityMesh(t){if(null==this._dotMesh){const o=e,r=o*o,i=2,n=new Int16Array(r*i);for(let t=0;t<o;t++)for(let e=0;e<o;e++)n[i*(e+t*o)]=e,n[i*(e+t*o)+1]=t;this._dotMesh=s.create(t,{primitive:h.POINTS,vertex:n,count:r,layout:p})}return this._dotMesh}getDotDensityTextures(e,s,o){if(this._dotTextureSize===s&&this._seed===o||(this._disposeTextures(),this._dotTextureSize=s,this._seed=o),null===this._dotTextures){const r=new t(o);this._dotTextures=[this._allocDotDensityTexture(e,s,r),this._allocDotDensityTexture(e,s,r)]}return this._dotTextures}_disposeTextures(){if(this._dotTextures){for(let t=0;t<this._dotTextures.length;t++)this._dotTextures[t].dispose();this._dotTextures=null}}_allocDotDensityTexture(t,e,s){const r=new Float32Array(e*e*4);for(let o=0;o<r.length;o++)r[o]=s.getFloat();const i=new m;return i.dataType=d.FLOAT,i.samplingMode=o.NEAREST,i.width=e,i.height=e,new T(t,i,r)}}export{f as DotDensityResources};