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createVerticesFromQuantizedTerrainMesh.js

createVerticesFromQuantizedTerrainMesh.js 8.9 KB
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  1. /**
    2. 

  2.  * @license
    3. 

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

  4.  * Version 1.99
    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(["./AxisAlignedBoundingBox-5f8053d3","./Matrix2-7a2bab7e","./Matrix3-edb29a7e","./defaultValue-135942ca","./TerrainEncoding-07bc9dac","./IndexDatatype-3a8ea78f","./Math-a304e2d6","./Transforms-3ea76111","./WebMercatorProjection-76d90916","./createTaskProcessorWorker","./RuntimeError-f0dada00","./AttributeCompression-5b18be52","./ComponentDatatype-e86a9f87","./WebGLConstants-fcb70ee3","./combine-462d91dd"],(function(e,t,r,n,o,i,a,s,c,d,h,u,l,I,g){"use strict";function m(){s.DeveloperError.throwInstantiationError()}Object.defineProperties(m.prototype,{errorEvent:{get:s.DeveloperError.throwInstantiationError},credit:{get:s.DeveloperError.throwInstantiationError},tilingScheme:{get:s.DeveloperError.throwInstantiationError},ready:{get:s.DeveloperError.throwInstantiationError},readyPromise:{get:s.DeveloperError.throwInstantiationError},hasWaterMask:{get:s.DeveloperError.throwInstantiationError},hasVertexNormals:{get:s.DeveloperError.throwInstantiationError},availability:{get:s.DeveloperError.throwInstantiationError}});const T=[];m.getRegularGridIndices=function(e,t){let r=T[e];n.defined(r)||(T[e]=r=[]);let o=r[t];return n.defined(o)||(o=e*t<a.CesiumMath.SIXTY_FOUR_KILOBYTES?r[t]=new Uint16Array((e-1)*(t-1)*6):r[t]=new Uint32Array((e-1)*(t-1)*6),y(e,t,o,0)),o};const E=[];m.getRegularGridIndicesAndEdgeIndices=function(e,t){let r=E[e];n.defined(r)||(E[e]=r=[]);let o=r[t];if(!n.defined(o)){const n=m.getRegularGridIndices(e,t),i=p(e,t),a=i.westIndicesSouthToNorth,s=i.southIndicesEastToWest,c=i.eastIndicesNorthToSouth,d=i.northIndicesWestToEast;o=r[t]={indices:n,westIndicesSouthToNorth:a,southIndicesEastToWest:s,eastIndicesNorthToSouth:c,northIndicesWestToEast:d}}return o};const f=[];function p(e,t){const r=new Array(t),n=new Array(e),o=new Array(t),i=new Array(e);let a;for(a=0;a<e;++a)i[a]=a,n[a]=e*t-1-a;for(a=0;a<t;++a)o[a]=(a+1)*e-1,r[a]=(t-a-1)*e;return{westIndicesSouthToNorth:r,southIndicesEastToWest:n,eastIndicesNorthToSouth:o,northIndicesWestToEast:i}}function y(e,t,r,n){let o=0;for(let i=0;i<t-1;++i){for(let t=0;t<e-1;++t){const t=o,i=t+e,a=i+1,s=t+1;r[n++]=t,r[n++]=i,r[n++]=s,r[n++]=s,r[n++]=i,r[n++]=a,++o}++o}}function N(e,t,r,n){let o=e[0];const i=e.length;for(let a=1;a<i;++a){const i=e[a];r[n++]=o,r[n++]=i,r[n++]=t,r[n++]=t,r[n++]=i,r[n++]=t+1,o=i,++t}return n}m.getRegularGridAndSkirtIndicesAndEdgeIndices=function(e,t){let r=f[e];n.defined(r)||(f[e]=r=[]);let o=r[t];if(!n.defined(o)){const n=e*t,a=(e-1)*(t-1)*6,s=2*e+2*t,c=n+s,d=a+6*Math.max(0,s-4),h=p(e,t),u=h.westIndicesSouthToNorth,l=h.southIndicesEastToWest,I=h.eastIndicesNorthToSouth,g=h.northIndicesWestToEast,T=i.IndexDatatype.createTypedArray(c,d);y(e,t,T,0),m.addSkirtIndices(u,l,I,g,n,T,a),o=r[t]={indices:T,westIndicesSouthToNorth:u,southIndicesEastToWest:l,eastIndicesNorthToSouth:I,northIndicesWestToEast:g,indexCountWithoutSkirts:a}}return o},m.addSkirtIndices=function(e,t,r,n,o,i,a){let s=o;a=N(e,s,i,a),s+=e.length,a=N(t,s,i,a),s+=t.length,a=N(r,s,i,a),s+=r.length,N(n,s,i,a)},m.heightmapTerrainQuality=.25,m.getEstimatedLevelZeroGeometricErrorForAHeightmap=function(e,t,r){return 2*e.maximumRadius*Math.PI*m.heightmapTerrainQuality/(t*r)},m.prototype.requestTileGeometry=s.DeveloperError.throwInstantiationError,m.prototype.getLevelMaximumGeometricError=s.DeveloperError.throwInstantiationError,m.prototype.getTileDataAvailable=s.DeveloperError.throwInstantiationError,m.prototype.loadTileDataAvailability=s.DeveloperError.throwInstantiationError;const w=32767,M=new r.Cartesian3,S=new r.Cartesian3,b=new r.Cartesian3,x=new r.Cartographic,A=new t.Cartesian2;function C(e,n,o,i,s,c,d,h,u){let l=Number.POSITIVE_INFINITY;const I=s.north,g=s.south;let m=s.east;const T=s.west;m<T&&(m+=a.CesiumMath.TWO_PI);const E=e.length;for(let s=0;s<E;++s){const E=e[s],f=o[E],p=i[E];x.longitude=a.CesiumMath.lerp(T,m,p.x),x.latitude=a.CesiumMath.lerp(g,I,p.y),x.height=f-n;const y=c.cartographicToCartesian(x,M);t.Matrix4.multiplyByPoint(d,y,y),r.Cartesian3.minimumByComponent(y,h,h),r.Cartesian3.maximumByComponent(y,u,u),l=Math.min(l,x.height)}return l}function W(e,t,r,o,i,s,d,h,u,l,I,g,m,T){const E=n.defined(d),f=u.north,p=u.south;let y=u.east;const N=u.west;y<N&&(y+=a.CesiumMath.TWO_PI);const w=r.length;for(let n=0;n<w;++n){const u=r[n],w=i[u],S=s[u];x.longitude=a.CesiumMath.lerp(N,y,S.x)+m,x.latitude=a.CesiumMath.lerp(p,f,S.y)+T,x.height=w-l;const b=h.cartographicToCartesian(x,M);if(E){const e=2*u;A.x=d[e],A.y=d[e+1]}let C,W;o.hasWebMercatorT&&(C=(c.WebMercatorProjection.geodeticLatitudeToMercatorAngle(x.latitude)-I)*g),o.hasGeodeticSurfaceNormals&&(W=h.geodeticSurfaceNormal(b)),t=o.encode(e,t,b,S,x.height,A,C,W)}}function v(e,t){let r;return"function"==typeof e.slice&&(r=e.slice(),"function"!=typeof r.sort&&(r=void 0)),n.defined(r)||(r=Array.prototype.slice.call(e)),r.sort(t),r}return d((function(d,h){const u=d.quantizedVertices,l=u.length/3,I=d.octEncodedNormals,g=d.westIndices.length+d.eastIndices.length+d.southIndices.length+d.northIndices.length,T=d.includeWebMercatorT,E=d.exaggeration,f=d.exaggerationRelativeHeight,p=1!==E,y=t.Rectangle.clone(d.rectangle),N=y.west,P=y.south,D=y.east,k=y.north,F=r.Ellipsoid.clone(d.ellipsoid),H=d.minimumHeight,_=d.maximumHeight,G=d.relativeToCenter,V=s.Transforms.eastNorthUpToFixedFrame(G,F),Y=t.Matrix4.inverseTransformation(V,new t.Matrix4);let O,B;T&&(O=c.WebMercatorProjection.geodeticLatitudeToMercatorAngle(P),B=1/(c.WebMercatorProjection.geodeticLatitudeToMercatorAngle(k)-O));const R=u.subarray(0,l),L=u.subarray(l,2*l),j=u.subarray(2*l,3*l),U=n.defined(I),z=new Array(l),q=new Array(l),Q=new Array(l),K=T?new Array(l):[],X=p?new Array(l):[],Z=S;Z.x=Number.POSITIVE_INFINITY,Z.y=Number.POSITIVE_INFINITY,Z.z=Number.POSITIVE_INFINITY;const J=b;J.x=Number.NEGATIVE_INFINITY,J.y=Number.NEGATIVE_INFINITY,J.z=Number.NEGATIVE_INFINITY;let $=Number.POSITIVE_INFINITY,ee=Number.NEGATIVE_INFINITY,te=Number.POSITIVE_INFINITY,re=Number.NEGATIVE_INFINITY;for(let e=0;e<l;++e){const n=R[e],o=L[e],i=n/w,s=o/w,d=a.CesiumMath.lerp(H,_,j[e]/w);x.longitude=a.CesiumMath.lerp(N,D,i),x.latitude=a.CesiumMath.lerp(P,k,s),x.height=d,$=Math.min(x.longitude,$),ee=Math.max(x.longitude,ee),te=Math.min(x.latitude,te),re=Math.max(x.latitude,re);const h=F.cartographicToCartesian(x);z[e]=new t.Cartesian2(i,s),q[e]=d,Q[e]=h,T&&(K[e]=(c.WebMercatorProjection.geodeticLatitudeToMercatorAngle(x.latitude)-O)*B),p&&(X[e]=F.geodeticSurfaceNormal(h)),t.Matrix4.multiplyByPoint(Y,h,M),r.Cartesian3.minimumByComponent(M,Z,Z),r.Cartesian3.maximumByComponent(M,J,J)}const ne=v(d.westIndices,(function(e,t){return z[e].y-z[t].y})),oe=v(d.eastIndices,(function(e,t){return z[t].y-z[e].y})),ie=v(d.southIndices,(function(e,t){return z[t].x-z[e].x})),ae=v(d.northIndices,(function(e,t){return z[e].x-z[t].x}));let se;if(H<0){se=new o.EllipsoidalOccluder(F).computeHorizonCullingPointPossiblyUnderEllipsoid(G,Q,H)}let ce=H;ce=Math.min(ce,C(d.westIndices,d.westSkirtHeight,q,z,y,F,Y,Z,J)),ce=Math.min(ce,C(d.southIndices,d.southSkirtHeight,q,z,y,F,Y,Z,J)),ce=Math.min(ce,C(d.eastIndices,d.eastSkirtHeight,q,z,y,F,Y,Z,J)),ce=Math.min(ce,C(d.northIndices,d.northSkirtHeight,q,z,y,F,Y,Z,J));const de=new e.AxisAlignedBoundingBox(Z,J,G),he=new o.TerrainEncoding(G,de,ce,_,V,U,T,p,E,f),ue=he.stride,le=new Float32Array(l*ue+g*ue);let Ie=0;for(let e=0;e<l;++e){if(U){const t=2*e;A.x=I[t],A.y=I[t+1]}Ie=he.encode(le,Ie,Q[e],z[e],q[e],A,K[e],X[e])}const ge=Math.max(0,2*(g-4)),me=d.indices.length+3*ge,Te=i.IndexDatatype.createTypedArray(l+g,me);Te.set(d.indices,0);const Ee=1e-4,fe=(ee-$)*Ee,pe=(re-te)*Ee,ye=-fe,Ne=fe,we=pe,Me=-pe;let Se=l*ue;return W(le,Se,ne,he,q,z,I,F,y,d.westSkirtHeight,O,B,ye,0),Se+=d.westIndices.length*ue,W(le,Se,ie,he,q,z,I,F,y,d.southSkirtHeight,O,B,0,Me),Se+=d.southIndices.length*ue,W(le,Se,oe,he,q,z,I,F,y,d.eastSkirtHeight,O,B,Ne,0),Se+=d.eastIndices.length*ue,W(le,Se,ae,he,q,z,I,F,y,d.northSkirtHeight,O,B,0,we),m.addSkirtIndices(ne,ie,oe,ae,l,Te,d.indices.length),h.push(le.buffer,Te.buffer),{vertices:le.buffer,indices:Te.buffer,westIndicesSouthToNorth:ne,southIndicesEastToWest:ie,eastIndicesNorthToSouth:oe,northIndicesWestToEast:ae,vertexStride:ue,center:G,minimumHeight:H,maximumHeight:_,occludeePointInScaledSpace:se,encoding:he,indexCountWithoutSkirts:d.indices.length}}))}));
    26.