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upsampleQuantizedTerrainMesh.js

upsampleQuantizedTerrainMesh.js 9.2 KB
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  1. /**
    2. 

  2.  * @license
    3. 

  3.  * Cesium - https://github.com/CesiumGS/cesium
    4. 

  4.  * Version 1.97
    5. 

  5.  *
    6. 

  6.  * Copyright 2011-2022 Cesium Contributors
    7. 

  7.  *
    8. 

  8.  * Licensed under the Apache License, Version 2.0 (the "License");
    9. 

  9.  * you may not use this file except in compliance with the License.
    10. 

  10.  * You may obtain a copy of the License at
    11. 

  11.  *
    12. 

  12.  * http://www.apache.org/licenses/LICENSE-2.0
    13. 

  13.  *
    14. 

  14.  * Unless required by applicable law or agreed to in writing, software
    15. 

  15.  * distributed under the License is distributed on an "AS IS" BASIS,
    16. 

  16.  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    17. 

  17.  * See the License for the specific language governing permissions and
    18. 

  18.  * limitations under the License.
    19. 

  19.  *
    20. 

  20.  * Columbus View (Pat. Pend.)
    21. 

  21.  *
    22. 

  22.  * Portions licensed separately.
    23. 

  23.  * See https://github.com/CesiumGS/cesium/blob/main/LICENSE.md for full licensing details.
    24. 

  24.  */
    25. 

  25. define(["./AttributeCompression-28a6d524","./Transforms-0c3fa360","./Matrix2-276d97d2","./defaultValue-a6eb9f34","./TerrainEncoding-1c789883","./IndexDatatype-856d3a0c","./ComponentDatatype-7f6d9570","./OrientedBoundingBox-60b83ce5","./createTaskProcessorWorker","./_commonjsHelpers-89c9b271","./combine-7cf28d88","./RuntimeError-07496d94","./WebGLConstants-d81b330d","./EllipsoidTangentPlane-30c83574","./AxisAlignedBoundingBox-646dc833","./IntersectionTests-fbcff83c","./Plane-17fe9d66"],(function(e,t,n,i,s,r,h,o,u,d,p,l,a,c,f,g,m){"use strict";const x={clipTriangleAtAxisAlignedThreshold:function(e,t,n,s,r,h){let o,u,d;i.defined(h)?h.length=0:h=[],t?(o=n<e,u=s<e,d=r<e):(o=n>e,u=s>e,d=r>e);const p=o+u+d;let l,a,c,f,g,m;return 1===p?o?(l=(e-n)/(s-n),a=(e-n)/(r-n),h.push(1),h.push(2),1!==a&&(h.push(-1),h.push(0),h.push(2),h.push(a)),1!==l&&(h.push(-1),h.push(0),h.push(1),h.push(l))):u?(c=(e-s)/(r-s),f=(e-s)/(n-s),h.push(2),h.push(0),1!==f&&(h.push(-1),h.push(1),h.push(0),h.push(f)),1!==c&&(h.push(-1),h.push(1),h.push(2),h.push(c))):d&&(g=(e-r)/(n-r),m=(e-r)/(s-r),h.push(0),h.push(1),1!==m&&(h.push(-1),h.push(2),h.push(1),h.push(m)),1!==g&&(h.push(-1),h.push(2),h.push(0),h.push(g))):2===p?o||n===e?u||s===e?d||r===e||(a=(e-n)/(r-n),c=(e-s)/(r-s),h.push(2),h.push(-1),h.push(0),h.push(2),h.push(a),h.push(-1),h.push(1),h.push(2),h.push(c)):(m=(e-r)/(s-r),l=(e-n)/(s-n),h.push(1),h.push(-1),h.push(2),h.push(1),h.push(m),h.push(-1),h.push(0),h.push(1),h.push(l)):(f=(e-s)/(n-s),g=(e-r)/(n-r),h.push(0),h.push(-1),h.push(1),h.push(0),h.push(f),h.push(-1),h.push(2),h.push(0),h.push(g)):3!==p&&(h.push(0),h.push(1),h.push(2)),h},computeBarycentricCoordinates:function(e,t,s,r,h,o,u,d,p){const l=s-u,a=u-h,c=o-d,f=r-d,g=1/(c*l+a*f),m=t-d,x=e-u,w=(c*x+a*m)*g,C=(-f*x+l*m)*g,B=1-w-C;return i.defined(p)?(p.x=w,p.y=C,p.z=B,p):new n.Cartesian3(w,C,B)},computeLineSegmentLineSegmentIntersection:function(e,t,s,r,h,o,u,d,p){const l=(d-o)*(s-e)-(u-h)*(r-t);if(0===l)return;const a=((u-h)*(t-o)-(d-o)*(e-h))/l,c=((s-e)*(t-o)-(r-t)*(e-h))/l;return a>=0&&a<=1&&c>=0&&c<=1?(i.defined(p)||(p=new n.Cartesian2),p.x=e+a*(s-e),p.y=t+a*(r-t),p):void 0}};var w=x;const C=32767,B=16383,y=[],I=[],A=[],b=new n.Cartographic;let v=new n.Cartesian3;const T=[],z=[],V=[],M=[],N=[],E=new n.Cartesian3,H=new t.BoundingSphere,R=new o.OrientedBoundingBox,O=new n.Cartesian2,S=new n.Cartesian3;function U(){this.vertexBuffer=void 0,this.index=void 0,this.first=void 0,this.second=void 0,this.ratio=void 0}U.prototype.clone=function(e){return i.defined(e)||(e=new U),e.uBuffer=this.uBuffer,e.vBuffer=this.vBuffer,e.heightBuffer=this.heightBuffer,e.normalBuffer=this.normalBuffer,e.index=this.index,e.first=this.first,e.second=this.second,e.ratio=this.ratio,e},U.prototype.initializeIndexed=function(e,t,n,i,s){this.uBuffer=e,this.vBuffer=t,this.heightBuffer=n,this.normalBuffer=i,this.index=s,this.first=void 0,this.second=void 0,this.ratio=void 0},U.prototype.initializeFromClipResult=function(e,t,n){let i=t+1;return-1!==e[t]?n[e[t]].clone(this):(this.vertexBuffer=void 0,this.index=void 0,this.first=n[e[i]],++i,this.second=n[e[i]],++i,this.ratio=e[i],++i),i},U.prototype.getKey=function(){return this.isIndexed()?this.index:JSON.stringify({first:this.first.getKey(),second:this.second.getKey(),ratio:this.ratio})},U.prototype.isIndexed=function(){return i.defined(this.index)},U.prototype.getH=function(){return i.defined(this.index)?this.heightBuffer[this.index]:h.CesiumMath.lerp(this.first.getH(),this.second.getH(),this.ratio)},U.prototype.getU=function(){return i.defined(this.index)?this.uBuffer[this.index]:h.CesiumMath.lerp(this.first.getU(),this.second.getU(),this.ratio)},U.prototype.getV=function(){return i.defined(this.index)?this.vBuffer[this.index]:h.CesiumMath.lerp(this.first.getV(),this.second.getV(),this.ratio)};let F=new n.Cartesian2,P=-1;const D=[new n.Cartesian3,new n.Cartesian3],W=[new n.Cartesian3,new n.Cartesian3];function X(t,i){++P;let s=D[P],r=W[P];return s=e.AttributeCompression.octDecode(t.first.getNormalX(),t.first.getNormalY(),s),r=e.AttributeCompression.octDecode(t.second.getNormalX(),t.second.getNormalY(),r),v=n.Cartesian3.lerp(s,r,t.ratio,v),n.Cartesian3.normalize(v,v),e.AttributeCompression.octEncode(v,i),--P,i}U.prototype.getNormalX=function(){return i.defined(this.index)?this.normalBuffer[2*this.index]:(F=X(this,F),F.x)},U.prototype.getNormalY=function(){return i.defined(this.index)?this.normalBuffer[2*this.index+1]:(F=X(this,F),F.y)};const k=[];function K(e,t,n,s,r,h,o,u,d){if(0===o.length)return;let p=0,l=0;for(;l<o.length;)l=k[p++].initializeFromClipResult(o,l,u);for(let r=0;r<p;++r){const o=k[r];if(o.isIndexed())o.newIndex=h[o.index],o.uBuffer=e,o.vBuffer=t,o.heightBuffer=n,d&&(o.normalBuffer=s);else{const r=o.getKey();if(i.defined(h[r]))o.newIndex=h[r];else{const i=e.length;e.push(o.getU()),t.push(o.getV()),n.push(o.getH()),d&&(s.push(o.getNormalX()),s.push(o.getNormalY())),o.newIndex=i,h[r]=i}}}3===p?(r.push(k[0].newIndex),r.push(k[1].newIndex),r.push(k[2].newIndex)):4===p&&(r.push(k[0].newIndex),r.push(k[1].newIndex),r.push(k[2].newIndex),r.push(k[0].newIndex),r.push(k[2].newIndex),r.push(k[3].newIndex))}return k.push(new U),k.push(new U),k.push(new U),k.push(new U),u((function(e,i){const u=e.isEastChild,d=e.isNorthChild,p=u?B:0,l=u?C:B,a=d?B:0,c=d?C:B,f=T,g=z,m=V,x=N;f.length=0,g.length=0,m.length=0,x.length=0;const F=M;F.length=0;const P={},D=e.vertices;let W=e.indices;W=W.subarray(0,e.indexCountWithoutSkirts);const X=s.TerrainEncoding.clone(e.encoding),k=X.hasVertexNormals;let L=0;const Y=e.vertexCountWithoutSkirts,_=e.minimumHeight,j=e.maximumHeight,G=new Array(Y),J=new Array(Y),Z=new Array(Y),q=k?new Array(2*Y):void 0;let Q,$,ee,te,ne;for($=0,ee=0;$<Y;++$,ee+=2){const e=X.decodeTextureCoordinates(D,$,O);if(Q=X.decodeHeight(D,$),te=h.CesiumMath.clamp(e.x*C|0,0,C),ne=h.CesiumMath.clamp(e.y*C|0,0,C),Z[$]=h.CesiumMath.clamp((Q-_)/(j-_)*C|0,0,C),te<20&&(te=0),ne<20&&(ne=0),C-te<20&&(te=C),C-ne<20&&(ne=C),G[$]=te,J[$]=ne,k){const e=X.getOctEncodedNormal(D,$,S);q[ee]=e.x,q[ee+1]=e.y}(u&&te>=B||!u&&te<=B)&&(d&&ne>=B||!d&&ne<=B)&&(P[$]=L,f.push(te),g.push(ne),m.push(Z[$]),k&&(x.push(q[ee]),x.push(q[ee+1])),++L)}const ie=[];ie.push(new U),ie.push(new U),ie.push(new U);const se=[];let re,he;for(se.push(new U),se.push(new U),se.push(new U),$=0;$<W.length;$+=3){const e=W[$],t=W[$+1],n=W[$+2],i=G[e],s=G[t],r=G[n];ie[0].initializeIndexed(G,J,Z,q,e),ie[1].initializeIndexed(G,J,Z,q,t),ie[2].initializeIndexed(G,J,Z,q,n);const h=w.clipTriangleAtAxisAlignedThreshold(B,u,i,s,r,y);re=0,re>=h.length||(re=se[0].initializeFromClipResult(h,re,ie),re>=h.length||(re=se[1].initializeFromClipResult(h,re,ie),re>=h.length||(re=se[2].initializeFromClipResult(h,re,ie),he=w.clipTriangleAtAxisAlignedThreshold(B,d,se[0].getV(),se[1].getV(),se[2].getV(),I),K(f,g,m,x,F,P,he,se,k),re<h.length&&(se[2].clone(se[1]),se[2].initializeFromClipResult(h,re,ie),he=w.clipTriangleAtAxisAlignedThreshold(B,d,se[0].getV(),se[1].getV(),se[2].getV(),I),K(f,g,m,x,F,P,he,se,k)))))}const oe=u?-32767:0,ue=d?-32767:0,de=[],pe=[],le=[],ae=[];let ce=Number.MAX_VALUE,fe=-ce;const ge=A;ge.length=0;const me=n.Ellipsoid.clone(e.ellipsoid),xe=n.Rectangle.clone(e.childRectangle),we=xe.north,Ce=xe.south;let Be=xe.east;const ye=xe.west;for(Be<ye&&(Be+=h.CesiumMath.TWO_PI),$=0;$<f.length;++$)te=Math.round(f[$]),te<=p?(de.push($),te=0):te>=l?(le.push($),te=C):te=2*te+oe,f[$]=te,ne=Math.round(g[$]),ne<=a?(pe.push($),ne=0):ne>=c?(ae.push($),ne=C):ne=2*ne+ue,g[$]=ne,Q=h.CesiumMath.lerp(_,j,m[$]/C),Q<ce&&(ce=Q),Q>fe&&(fe=Q),m[$]=Q,b.longitude=h.CesiumMath.lerp(ye,Be,te/C),b.latitude=h.CesiumMath.lerp(Ce,we,ne/C),b.height=Q,me.cartographicToCartesian(b,v),ge.push(v.x),ge.push(v.y),ge.push(v.z);const Ie=t.BoundingSphere.fromVertices(ge,n.Cartesian3.ZERO,3,H),Ae=o.OrientedBoundingBox.fromRectangle(xe,ce,fe,me,R),be=new s.EllipsoidalOccluder(me).computeHorizonCullingPointFromVerticesPossiblyUnderEllipsoid(Ie.center,ge,3,Ie.center,ce,E),ve=fe-ce,Te=new Uint16Array(f.length+g.length+m.length);for($=0;$<f.length;++$)Te[$]=f[$];let ze=f.length;for($=0;$<g.length;++$)Te[ze+$]=g[$];for(ze+=g.length,$=0;$<m.length;++$)Te[ze+$]=C*(m[$]-ce)/ve;const Ve=r.IndexDatatype.createTypedArray(f.length,F);let Me;if(k){const e=new Uint8Array(x);i.push(Te.buffer,Ve.buffer,e.buffer),Me=e.buffer}else i.push(Te.buffer,Ve.buffer);return{vertices:Te.buffer,encodedNormals:Me,indices:Ve.buffer,minimumHeight:ce,maximumHeight:fe,westIndices:de,southIndices:pe,eastIndices:le,northIndices:ae,boundingSphere:Ie,orientedBoundingBox:Ae,horizonOcclusionPoint:be}}))}));
    26.