@arcgis/core/views/3d/webgl-engine/lib/ViewshedShadowMap.js

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

/* COPYRIGHT Esri - https://js.arcgis.com/5.0.8/LICENSE.txt */
import has from"../../../../core/has.js";import{clamp as t}from"../../../../core/mathUtils.js";import{releaseMaybe as e}from"../../../../core/maybe.js";import{fromRotation as i}from"../../../../core/libs/gl-matrix-2/math/mat4.js";import{create as s}from"../../../../core/libs/gl-matrix-2/factories/mat4f64.js";import{sub as r,add as o,negate as a,transformMat4 as h}from"../../../../core/libs/gl-matrix-2/math/vec3.js";import{create as c}from"../../../../core/libs/gl-matrix-2/factories/vec3f64.js";import{applyTextureResizeModulo as n}from"./textureUtils.js";import{ViewshedFaceCamera as l}from"./ViewshedFaceCamera.js";import{DepthStencilAttachment as u,SizedDepthFormat as m}from"../../../webgl/enums.js";import{isSizedDepthStencilFormat as f}from"../../../webgl/textureUtils.js";class d{constructor(){this.textureSizeQuality=1,this.textureSizeModHighQuality=1.3,this.textureSizeModLowQuality=.9,this.textureSizeMultiple=128,this.toleranceSides=5,this.toleranceBottomTop=10}textureSizeModifier(t){const e=t?this.textureSizeModHighQuality:this.textureSizeModLowQuality;return this.textureSizeQuality*e}textureResizeModulo(t){return Math.ceil(t/this.textureSizeMultiple)*this.textureSizeMultiple}}const p=["front","left","right","back","top","bottom"];function g(t){return!["top","bottom"].includes(t)}class x{constructor(t){this._fbos=t,this._faces={},this._width=0,this._height=0,this.settings=new d,this._maxTextureSize=Math.min(has("esri-mobile")?4096:16384,t.rctx.parameters.maxTextureSize)}get depthTexture(){return this._handle?.getTexture(u)}get ready(){return null!=this.depthTexture&&0!==this._width&&0!==this._height}get nearFar(){const t=this.faces;return 0===t.length?null:t[0].nearFar}get numActiveFaces(){const t=this._faces;let e=0;return Object.keys(t).forEach(i=>{t[i]&&(e+=1)}),e}get faces(){const t=this._faces,e=[];for(const i of p){const s=t[i];s&&e.push(s)}return e}get atlasRegions(){return this.faces.map(t=>[t.x/this._width,(t.x+t.width)/this._width,t.y/this._height,(t.y+t.height)/this._height])}get viewshedProjectionMatrices(){return this.faces.map(t=>t.projectionMatrix)}get viewshedViewMatrices(){return this.faces.map(t=>t.viewMatrix)}_setupFaceCamera(e,n,u,m){const{effectiveObserverRenderSpace:f,tiltedUpVector:d,targetRenderSpace:p,farDistanceRenderSpace:x,horizontalFieldOfView:_,verticalFieldOfView:b}=n,w=c();r(w,p,f);const M=c(),S=c(),F=(t,e)=>{const r=c(),a=s();return i(a,t,e),h(r,w,a),o(r,f,r),r};let z,T=d;const v=Math.min(90,_),O=Math.min(90,Math.max(0,(_-90)/2));let j=-45,B=45,y=-45,k=45;if(g(e)){const e=e=>t(e,-45,45);y=e(-b/2)-this.settings.toleranceBottomTop,k=e(+b/2)+this.settings.toleranceBottomTop}switch(e){case"front":z=p,j=-v/2,B=v/2;break;case"left":z=F(Math.PI/2,d),j=45-O;break;case"right":z=F(-Math.PI/2,d),B=-45+O;break;case"top":z=o(M,f,d),T=a(S,w);break;case"bottom":z=r(M,f,d),T=w;break;case"back":z=F(Math.PI,d)}const V=new l({center:z,eye:f,up:T,far:x});V.sectionAnglesDeg=[j-this.settings.toleranceSides,B+this.settings.toleranceSides,y,k],V.fovY=Math.PI/2;const P=V.setViewport(u,m);return this._faces[e]=V,P}isActive(t){return this._computeActiveFaces(t).size>0}_computeActiveFaces(t){const e=new Set,{horizontalFieldOfView:i,verticalFieldOfView:s}=t,r=-s/2,o=s/2;return 0===i||0===s||(r<=45&&o>=-45&&e.add("front"),i>90&&(e.add("left"),e.add("right")),i>270&&e.add("back"),o>45-this.settings.toleranceBottomTop&&e.add("top"),r<-45+this.settings.toleranceBottomTop&&e.add("bottom")),e}_computeBaseTextureSize({pixelRatio:t,fullWidth:e,fullHeight:i},s,r,o){const a=s/t,h=this.settings.textureSizeModifier(r);return n(Math.max(e,i)*a*h,this._maxTextureSize/o)}_ensureFBO(t){const e=this._width,i=this._height,s=this._handle?.fbo;s&&s.width===e&&s.height===i&&t===f(s.depthStencilTexture?.descriptor?.internalFormat??m.DEPTH_COMPONENT16)||(this._handle?.release(),this._handle=this._allocateFBO(t))}_allocateFBO(t){const{_width:e,_height:i}=this,s=t?14:13,r=this._fbos.acquire(e,i,"viewshed shadow map",s);return r.getTexture(u)?.setShadowFiltering(!1),r}clearFBO(t){const e=this._fbos.rctx;this._ensureFBO(t),e.bindFramebuffer(this._handle?.fbo),e.setClearColor(1,1,1,1),e.clear(16640)}dispose(){this._debugFBO||(this._handle=e(this._handle))}start(t,e,i,s,r=!1){this._faces={};const o=this._computeActiveFaces(e),a=o.size;if(0===a)return!1;const h=this._computeBaseTextureSize(t,s,i,a);let c=0,n=0,l=0;return p.filter(t=>o.has(t)).forEach(t=>{const i=_(t,a);i>n&&(l=Math.max(l,c),c=0),n=i;const s=i*h;c+=this._setupFaceCamera(t,e,[c,s],h)}),l=Math.max(l,c),this._width=this.settings.textureResizeModulo(l),this._height=b(a)*h,this.clearFBO(r),!0}finish(){}get test(){}}function _(t,e){if(e<4)return 0;const i="front"===t||"left"===t;return 4===e?i?0:1:i||"right"===t?0:1}function b(t){return t<4?1:2}export{x as ViewshedShadowMap};