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three

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JavaScript 3D library

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console.warn( "THREE.STLExporter: As part of the transition to ES6 Modules, the files in 'examples/js' were deprecated in May 2020 (r117) and will be deleted in December 2020 (r124). You can find more information about developing using ES6 Modules in https://threejs.org/docs/#manual/en/introduction/Installation." ); /** * Usage: * var exporter = new THREE.STLExporter(); * * // second argument is a list of options * var data = exporter.parse( mesh, { binary: true } ); * */ THREE.STLExporter = function () {}; THREE.STLExporter.prototype = { constructor: THREE.STLExporter, parse: ( function () { var vector = new THREE.Vector3(); var normalMatrixWorld = new THREE.Matrix3(); return function parse( scene, options ) { if ( options === undefined ) options = {}; var binary = options.binary !== undefined ? options.binary : false; // var objects = []; var triangles = 0; scene.traverse( function ( object ) { if ( object.isMesh ) { var geometry = object.geometry; if ( geometry.isBufferGeometry ) { geometry = new THREE.Geometry().fromBufferGeometry( geometry ); } if ( geometry.isGeometry ) { triangles += geometry.faces.length; objects.push( { geometry: geometry, matrixWorld: object.matrixWorld } ); } } } ); if ( binary ) { var offset = 80; // skip header var bufferLength = triangles * 2 + triangles * 3 * 4 * 4 + 80 + 4; var arrayBuffer = new ArrayBuffer( bufferLength ); var output = new DataView( arrayBuffer ); output.setUint32( offset, triangles, true ); offset += 4; for ( var i = 0, il = objects.length; i < il; i ++ ) { var object = objects[ i ]; var vertices = object.geometry.vertices; var faces = object.geometry.faces; var matrixWorld = object.matrixWorld; normalMatrixWorld.getNormalMatrix( matrixWorld ); for ( var j = 0, jl = faces.length; j < jl; j ++ ) { var face = faces[ j ]; vector.copy( face.normal ).applyMatrix3( normalMatrixWorld ).normalize(); output.setFloat32( offset, vector.x, true ); offset += 4; // normal output.setFloat32( offset, vector.y, true ); offset += 4; output.setFloat32( offset, vector.z, true ); offset += 4; var indices = [ face.a, face.b, face.c ]; for ( var k = 0; k < 3; k ++ ) { vector.copy( vertices[ indices[ k ] ] ).applyMatrix4( matrixWorld ); output.setFloat32( offset, vector.x, true ); offset += 4; // vertices output.setFloat32( offset, vector.y, true ); offset += 4; output.setFloat32( offset, vector.z, true ); offset += 4; } output.setUint16( offset, 0, true ); offset += 2; // attribute byte count } } return output; } else { var output = ''; output += 'solid exported\n'; for ( var i = 0, il = objects.length; i < il; i ++ ) { var object = objects[ i ]; var vertices = object.geometry.vertices; var faces = object.geometry.faces; var matrixWorld = object.matrixWorld; normalMatrixWorld.getNormalMatrix( matrixWorld ); for ( var j = 0, jl = faces.length; j < jl; j ++ ) { var face = faces[ j ]; vector.copy( face.normal ).applyMatrix3( normalMatrixWorld ).normalize(); output += '\tfacet normal ' + vector.x + ' ' + vector.y + ' ' + vector.z + '\n'; output += '\t\touter loop\n'; var indices = [ face.a, face.b, face.c ]; for ( var k = 0; k < 3; k ++ ) { vector.copy( vertices[ indices[ k ] ] ).applyMatrix4( matrixWorld ); output += '\t\t\tvertex ' + vector.x + ' ' + vector.y + ' ' + vector.z + '\n'; } output += '\t\tendloop\n'; output += '\tendfacet\n'; } } output += 'endsolid exported\n'; return output; } }; }() ) };