@maplat/transform/dist/maplat_transform.cjs

A JavaScript library that performs coordinate transformation between two plane coordinate systems using transformation definitions generated by Maplat.

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n=0;n<a[a.length-1].length;n++)if(a[a.length-1][n]!==a[0][n])throw new Error("First and last Position are not equivalent.")}return Z({type:"Polygon",coordinates:e},t,s)}function B(e,t={}){const s={type:"FeatureCollection"};return t.id&&(s.id=t.id),t.bbox&&(s.bbox=t.bbox),s.features=e,s}function J(e){return!isNaN(e)&&e!==null&&!Array.isArray(e)}function mt(e){if(!e)throw new Error("coord is required");if(!Array.isArray(e)){if(e.type==="Feature"&&e.geometry!==null&&e.geometry.type==="Point")return[...e.geometry.coordinates];if(e.type==="Point")return[...e.coordinates]}if(Array.isArray(e)&&e.length>=2&&!Array.isArray(e[0])&&!Array.isArray(e[1]))return[...e];throw new Error("coord must be GeoJSON Point or an Array of numbers")}function K(e){if(Array.isArray(e))return e;if(e.type==="Feature"){if(e.geometry!==null)return e.geometry.coordinates}else if(e.coordinates)return e.coordinates;throw new Error("coords must be GeoJSON Feature, Geometry Object or an Array")}function xt(e){return 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r=t[s];`${r.properties.a.index}`.substring(0,1)==="b"&&`${r.properties.b.index}`.substring(0,1)==="b"?t[s]={geometry:{type:"Polygon",coordinates:[[r.geometry.coordinates[0][2],r.geometry.coordinates[0][0],r.geometry.coordinates[0][1],r.geometry.coordinates[0][2]]]},properties:{a:{geom:r.properties.c.geom,index:r.properties.c.index},b:{geom:r.properties.a.geom,index:r.properties.a.index},c:{geom:r.properties.b.geom,index:r.properties.b.index}},type:"Feature"}:`${r.properties.c.index}`.substring(0,1)==="b"&&`${r.properties.a.index}`.substring(0,1)==="b"&&(t[s]={geometry:{type:"Polygon",coordinates:[[r.geometry.coordinates[0][1],r.geometry.coordinates[0][2],r.geometry.coordinates[0][0],r.geometry.coordinates[0][1]]]},properties:{a:{geom:r.properties.b.geom,index:r.properties.b.index},b:{geom:r.properties.c.geom,index:r.properties.c.index},c:{geom:r.properties.a.geom,index:r.properties.a.index}},type:"Feature"})}return e}function Mt(e){const 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st(e,g.features[0],r)}function nt(e,t,s,r,a,n,c,l){let g;if(c&&(g=Q(e,B([c]))),!g){if(s){const d=e.geometry.coordinates,y=s.gridNum,o=s.xOrigin,u=s.yOrigin,b=s.xUnit,x=s.yUnit,h=s.gridCache,f=C(d[0],o,b,y),i=C(d[1],u,x,y),w=h[f]?h[f][i]?h[f][i]:[]:[];t=B(w.map(v=>t.features[v]))}g=Q(e,t)}return l&&l(g),g?st(e,g,n):Tt(e,r,a,n)}function C(e,t,s,r){let a=Math.floor((e-t)/s);return a>=r&&(a=r-1),a}function Ot(e,t){let s=H(e-t[0]),r=Math.PI*2,a;for(let n=0;n<t.length;n++){const c=(n+1)%t.length,l=H(e-t[c]),g=Math.min(Math.abs(s),Math.abs(l));s*l<=0&&g<r&&(r=g,a=n),s=l}return a}function H(e,t=!1){const s=t?function(r){return!(r>=0&&r<Math.PI*2)}:function(r){return!(r>-1*Math.PI&&r<=Math.PI)};for(;s(e);)e=e+2*Math.PI*(e>0?-1:1);return e}const q=2.00703,T=class T{constructor(){_(this,"points",[]);_(this,"pointsWeightBuffer");_(this,"strict_status");_(this,"vertices_params");_(this,"centroid");_(this,"edgeNodes");_(this,"edges");_(this,"tins");_(this,"kinks");_(this,"yaxisMode",T.YAXIS_INVERT);_(this,"strictMode",T.MODE_AUTO);_(this,"vertexMode",T.VERTEX_PLAIN);_(this,"bounds");_(this,"boundsPolygon");_(this,"wh");_(this,"xy");_(this,"indexedTins");_(this,"stateFull",!1);_(this,"stateTriangle");_(this,"stateBackward")}setCompiled(t){if(t.version||!t.tins&&t.points&&t.tins_points){this.points=t.points,this.pointsWeightBuffer=!t.version||t.version<2.00703?["forw","bakw"].reduce((r,a)=>{const n=t.weight_buffer[a];return n&&(r[a]=Object.keys(n).reduce((c,l)=>{const g=et(l);return c[g]=n[l],c},{})),r},{}):t.weight_buffer,t.strict_status?this.strict_status=t.strict_status:t.kinks_points?this.strict_status=T.STATUS_ERROR:t.tins_points.length==2?this.strict_status=T.STATUS_LOOSE:this.strict_status=T.STATUS_STRICT,this.vertices_params={forw:[t.vertices_params[0]],bakw:[t.vertices_params[1]]},this.vertices_params.forw[1]=[0,1,2,3].map(r=>{const a=(r+1)%4,n=W(["c",`b${r}`,`b${a}`],t.points,t.edgeNodes||[],t.centroid_point,t.vertices_points,!1,q);return B([n])}),this.vertices_params.bakw[1]=[0,1,2,3].map(r=>{const a=(r+1)%4,n=W(["c",`b${r}`,`b${a}`],t.points,t.edgeNodes||[],t.centroid_point,t.vertices_points,!0,q);return B([n])}),this.centroid={forw:Y(t.centroid_point[0],{target:{geom:t.centroid_point[1],index:"c"}}),bakw:Y(t.centroid_point[1],{target:{geom:t.centroid_point[0],index:"c"}})},this.edges=rt(t.edges||[]),this.edgeNodes=t.edgeNodes||[];const s=t.tins_points.length==1?0:1;this.tins={forw:B(t.tins_points[0].map(r=>W(r,t.points,t.edgeNodes||[],t.centroid_point,t.vertices_points,!1,t.version))),bakw:B(t.tins_points[s].map(r=>W(r,t.points,t.edgeNodes||[],t.centroid_point,t.vertices_points,!0,t.version)))},this.addIndexedTin(),t.kinks_points&&(this.kinks={bakw:B(t.kinks_points.map(r=>Y(r)))}),t.yaxisMode?this.yaxisMode=t.yaxisMode:this.yaxisMode=T.YAXIS_INVERT,t.vertexMode&&(this.vertexMode=t.vertexMode),t.strictMode&&(this.strictMode=t.strictMode),t.bounds?(this.bounds=t.bounds,this.boundsPolygon=t.boundsPolygon,this.xy=t.xy,this.wh=t.wh):(this.xy=[0,0],t.wh&&(this.wh=t.wh),this.bounds=void 0,this.boundsPolygon=void 0)}else{t=JSON.parse(JSON.stringify(t).replace('"cent"','"c"').replace(/"bbox(\d+)"/g,'"b$1"')),this.tins=t.tins,this.addIndexedTin(),this.strict_status=t.strict_status,this.pointsWeightBuffer=t.weight_buffer,this.vertices_params=t.vertices_params,this.centroid=t.centroid,this.kinks=t.kinks;const s=[];for(let r=0;r<this.tins.forw.features.length;r++){const a=this.tins.forw.features[r];["a","b","c"].map((n,c)=>{const l=a.geometry.coordinates[0][c],g=a.properties[n].geom,d=a.properties[n].index;typeof d=="number"&&(s[d]=[l,g])})}this.points=s}}addIndexedTin(){const t=this.tins,s=t.forw,r=t.bakw,a=Math.ceil(Math.sqrt(s.features.length));if(a<3){this.indexedTins=void 0;return}let n=[],c=[];const l=s.features.map(h=>{let f=[];return K(h)[0].map(i=>{n.length===0?n=[Array.from(i),Array.from(i)]:(i[0]<n[0][0]&&(n[0][0]=i[0]),i[0]>n[1][0]&&(n[1][0]=i[0]),i[1]<n[0][1]&&(n[0][1]=i[1]),i[1]>n[1][1]&&(n[1][1]=i[1])),f.length===0?f=[Array.from(i),Array.from(i)]:(i[0]<f[0][0]&&(f[0][0]=i[0]),i[0]>f[1][0]&&(f[1][0]=i[0]),i[1]<f[0][1]&&(f[0][1]=i[1]),i[1]>f[1][1]&&(f[1][1]=i[1]))}),f}),g=(n[1][0]-n[0][0])/a,d=(n[1][1]-n[0][1])/a,y=l.reduce((h,f,i)=>{const w=C(f[0][0],n[0][0],g,a),v=C(f[1][0],n[0][0],g,a),A=C(f[0][1],n[0][1],d,a),E=C(f[1][1],n[0][1],d,a);for(let m=w;m<=v;m++){h[m]||(h[m]=[]);for(let M=A;M<=E;M++)h[m][M]||(h[m][M]=[]),h[m][M].push(i)}return h},[]),o=r.features.map(h=>{let f=[];return K(h)[0].map(i=>{c.length===0?c=[Array.from(i),Array.from(i)]:(i[0]<c[0][0]&&(c[0][0]=i[0]),i[0]>c[1][0]&&(c[1][0]=i[0]),i[1]<c[0][1]&&(c[0][1]=i[1]),i[1]>c[1][1]&&(c[1][1]=i[1])),f.length===0?f=[Array.from(i),Array.from(i)]:(i[0]<f[0][0]&&(f[0][0]=i[0]),i[0]>f[1][0]&&(f[1][0]=i[0]),i[1]<f[0][1]&&(f[0][1]=i[1]),i[1]>f[1][1]&&(f[1][1]=i[1]))}),f}),u=(c[1][0]-c[0][0])/a,b=(c[1][1]-c[0][1])/a,x=o.reduce((h,f,i)=>{const w=C(f[0][0],c[0][0],u,a),v=C(f[1][0],c[0][0],u,a),A=C(f[0][1],c[0][1],b,a),E=C(f[1][1],c[0][1],b,a);for(let m=w;m<=v;m++){h[m]||(h[m]=[]);for(let M=A;M<=E;M++)h[m][M]||(h[m][M]=[]),h[m][M].push(i)}return h},[]);this.indexedTins={forw:{gridNum:a,xOrigin:n[0][0],yOrigin:n[0][1],xUnit:g,yUnit:d,gridCache:y},bakw:{gridNum:a,xOrigin:c[0][0],yOrigin:c[0][1],xUnit:u,yUnit:b,gridCache:x}}}transform(t,s,r){if(s&&this.strict_status==T.STATUS_ERROR)throw'Backward transform is not allowed if strict_status == "strict_error"';this.yaxisMode==T.YAXIS_FOLLOW&&s&&(t=[t[0],-1*t[1]]);const a=Y(t);if(this.bounds&&!s&&!r&&!D(a,this.boundsPolygon))return!1;const n=s?this.tins.bakw:this.tins.forw,c=s?this.indexedTins.bakw:this.indexedTins.forw,l=s?this.vertices_params.bakw:this.vertices_params.forw,g=s?this.centroid.bakw:this.centroid.forw,d=s?this.pointsWeightBuffer.bakw:this.pointsWeightBuffer.forw;let y,o;this.stateFull&&(this.stateBackward==s?y=this.stateTriangle:(this.stateBackward=s,this.stateTriangle=void 0),o=b=>{this.stateTriangle=b});let u=nt(a,n,c,l,g,d,y,o);if(this.bounds&&s&&!r){const b=Y(u);if(!D(b,this.boundsPolygon))return!1}else this.yaxisMode==T.YAXIS_FOLLOW&&!s&&(u=[u[0],-1*u[1]]);return u}};_(T,"VERTEX_PLAIN","plain"),_(T,"VERTEX_BIRDEYE","birdeye"),_(T,"MODE_STRICT","strict"),_(T,"MODE_AUTO","auto"),_(T,"MODE_LOOSE","loose"),_(T,"STATUS_STRICT","strict"),_(T,"STATUS_ERROR","strict_error"),_(T,"STATUS_LOOSE","loose"),_(T,"YAXIS_FOLLOW","follow"),_(T,"YAXIS_INVERT","invert");let L=T;exports.Transform=L;exports.counterTri=Mt;exports.format_version=q;exports.normalizeEdges=rt;exports.rotateVerticesTriangle=At;exports.transformArr=nt;