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mrdoobmrdoob
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Merge remote-tracking branch 'valette/VTKLoader' into dev
2 parents db5ff0e + 5997944 commit f1d47cc

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‎examples/js/VTKLoader.js‎

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/**
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* @author Sebastien Valette sebastien.valette@creatis.insa-lyon.fr
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*/
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THREE.VTKLoader = function ( showStatus ) {
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THREE.Loader.call( this, showStatus );
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};
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THREE.VTKLoader.prototype = new THREE.Loader();
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THREE.VTKLoader.prototype.constructor = THREE.VTKLoader;
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THREE.VTKLoader.prototype.supr = THREE.Loader.prototype;
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THREE.VTKLoader.prototype.load = function( url, callback) {
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this.onLoadStart();
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function parseGeometry(text){
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var geometry=new THREE.Geometry();
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var lines=text.split("\n");
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function v( x, y, z ) {
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geometry.vertices.push( new THREE.Vector3( x, y, z ) );
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}
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function f3( a, b, c ) {
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geometry.faces.push( new THREE.Face3( a, b, c ) );
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}
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var lineIndex=0;
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var line=lines[0].split(" ");
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var lineLength=line.length;
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var columnIndex=-1;
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function readNextString ()
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{
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while (1)
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{
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var nextWord=line[columnIndex];
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columnIndex++;
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if (columnIndex==lineLength)
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{
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lineIndex++;
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columnIndex=0;
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if (lineIndex>lines.length)
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return ("");
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line=lines[lineIndex].split(" ");
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lineLength=line.length;
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}
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if (nextWord!=null)
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if (nextWord.length>0)
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return (nextWord);
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}
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}
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// read point data
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var found=false;
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while (!found)
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{
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var readString=readNextString();
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switch (readString.toUpperCase())
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{
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case "POINTS":
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found=true;
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break;
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case "":
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alert ("error while reading "+url+" : \n");
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return;
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default:
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}
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}
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var newIndex;
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var new2old;
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var numberOfPoints=parseInt(readNextString());
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if (numberOfPoints>5000000)
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{
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alert ("mesh is too big : "+numberOfPoints+" vertices");
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return;
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}
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var coord=[0,0,0];
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var index2=0;
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var number;
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var coordIndex;
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for (var j=0;j!=numberOfPoints;j++)
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{
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for (coordIndex=0;coordIndex<3;coordIndex++)
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{
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do
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{
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number=parseFloat(line[columnIndex]);
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columnIndex++;
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if (columnIndex==lineLength)
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{
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lineIndex++;
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columnIndex=0;
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if (lineIndex>lines.length)
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{
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alert ("error while reading "+url+" : \n");
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return;
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}
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line=lines[lineIndex].split(" ");
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lineLength=line.length;
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}
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} while (isNaN(number))
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coord[coordIndex]=number;
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}
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v(coord[0],coord[1],coord[2]);
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}
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found=false;
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while (!found)
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{
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var readString=readNextString();
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switch (readString)
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{
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case "POLYGONS":
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found=true;
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break;
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case "":
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alert ("error while reading "+url+" : \n");
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return;
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default:
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}
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}
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var numberOfPolygons=parseInt(readNextString());
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var numberOfpolygonElements=parseInt(readNextString());
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index2=0;
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var connectivity=[];
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for (var p=0;p!=numberOfpolygonElements;p++)
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{
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do
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{
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number=parseInt(line[columnIndex]);
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columnIndex++;
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if (columnIndex==lineLength)
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{
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lineIndex++;
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columnIndex=0;
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if (lineIndex>lines.length)
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{
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alert ("error while reading "+url+" : \n");
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return;
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}
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line=lines[lineIndex].split(" ");
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lineLength=line.length;
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}
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} while (isNaN(number))
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connectivity[index2]=number;
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index2++;
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if (index2==connectivity[0]+1)
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{
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var triangle=[0,0,0];
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index2=0;
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var numberOfTrianglesInCell=connectivity[0]-2;
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var vertex1=triangle[0]=connectivity[1];
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for (var i=0;i<numberOfTrianglesInCell;i++)
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{
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var vertex2=connectivity[i+2];
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var vertex3=triangle[2]=connectivity[i+3];
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f3(vertex1,vertex2,vertex3);
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}
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}
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}
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geometry.computeCentroids();
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geometry.computeFaceNormals();
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geometry.computeVertexNormals();
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geometry.computeBoundingSphere();
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return (geometry);
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}
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var xmlhttp=new XMLHttpRequest();
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xmlhttp.open("GET",url,true);
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function handler()
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{
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if(xmlhttp.readyState == 4)
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{
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if (xmlhttp.status!=200)
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{
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alert("Could not read file "+url+": error"+xmlhttp.status);
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return;
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}
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var myGeometry=parseGeometry(xmlhttp.responseText);
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callback(myGeometry);
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}
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}
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xmlhttp.onreadystatechange=handler;
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xmlhttp.send();
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};
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