File: //var/www/aspa/three/addons/loaders/PLYLoader.js
import {
BufferGeometry,
FileLoader,
Float32BufferAttribute,
Loader,
Color
} from 'three';
/**
* Description: A THREE loader for PLY ASCII files (known as the Polygon
* File Format or the Stanford Triangle Format).
*
* Limitations: ASCII decoding assumes file is UTF-8.
*
* Usage:
* const loader = new PLYLoader();
* loader.load('./models/ply/ascii/dolphins.ply', function (geometry) {
*
* scene.add( new THREE.Mesh( geometry ) );
*
* } );
*
* If the PLY file uses non standard property names, they can be mapped while
* loading. For example, the following maps the properties
* “diffuse_(red|green|blue)” in the file to standard color names.
*
* loader.setPropertyNameMapping( {
* diffuse_red: 'red',
* diffuse_green: 'green',
* diffuse_blue: 'blue'
* } );
*
* Custom properties outside of the defaults for position, uv, normal
* and color attributes can be added using the setCustomPropertyNameMapping method.
* For example, the following maps the element properties “custom_property_a”
* and “custom_property_b” to an attribute “customAttribute” with an item size of 2.
* Attribute item sizes are set from the number of element properties in the property array.
*
* loader.setCustomPropertyNameMapping( {
* customAttribute: ['custom_property_a', 'custom_property_b'],
* } );
*
*/
const _color = new Color();
class PLYLoader extends Loader {
constructor( manager ) {
super( manager );
this.propertyNameMapping = {};
this.customPropertyMapping = {};
}
load( url, onLoad, onProgress, onError ) {
const scope = this;
const loader = new FileLoader( this.manager );
loader.setPath( this.path );
loader.setResponseType( 'arraybuffer' );
loader.setRequestHeader( this.requestHeader );
loader.setWithCredentials( this.withCredentials );
loader.load( url, function ( text ) {
try {
onLoad( scope.parse( text ) );
} catch ( e ) {
if ( onError ) {
onError( e );
} else {
console.error( e );
}
scope.manager.itemError( url );
}
}, onProgress, onError );
}
setPropertyNameMapping( mapping ) {
this.propertyNameMapping = mapping;
}
setCustomPropertyNameMapping( mapping ) {
this.customPropertyMapping = mapping;
}
parse( data ) {
function parseHeader( data, headerLength = 0 ) {
const patternHeader = /^ply([\s\S]*)end_header(\r\n|\r|\n)/;
let headerText = '';
const result = patternHeader.exec( data );
if ( result !== null ) {
headerText = result[ 1 ];
}
const header = {
comments: [],
elements: [],
headerLength: headerLength,
objInfo: ''
};
const lines = headerText.split( /\r\n|\r|\n/ );
let currentElement;
function make_ply_element_property( propertValues, propertyNameMapping ) {
const property = { type: propertValues[ 0 ] };
if ( property.type === 'list' ) {
property.name = propertValues[ 3 ];
property.countType = propertValues[ 1 ];
property.itemType = propertValues[ 2 ];
} else {
property.name = propertValues[ 1 ];
}
if ( property.name in propertyNameMapping ) {
property.name = propertyNameMapping[ property.name ];
}
return property;
}
for ( let i = 0; i < lines.length; i ++ ) {
let line = lines[ i ];
line = line.trim();
if ( line === '' ) continue;
const lineValues = line.split( /\s+/ );
const lineType = lineValues.shift();
line = lineValues.join( ' ' );
switch ( lineType ) {
case 'format':
header.format = lineValues[ 0 ];
header.version = lineValues[ 1 ];
break;
case 'comment':
header.comments.push( line );
break;
case 'element':
if ( currentElement !== undefined ) {
header.elements.push( currentElement );
}
currentElement = {};
currentElement.name = lineValues[ 0 ];
currentElement.count = parseInt( lineValues[ 1 ] );
currentElement.properties = [];
break;
case 'property':
currentElement.properties.push( make_ply_element_property( lineValues, scope.propertyNameMapping ) );
break;
case 'obj_info':
header.objInfo = line;
break;
default:
console.log( 'unhandled', lineType, lineValues );
}
}
if ( currentElement !== undefined ) {
header.elements.push( currentElement );
}
return header;
}
function parseASCIINumber( n, type ) {
switch ( type ) {
case 'char': case 'uchar': case 'short': case 'ushort': case 'int': case 'uint':
case 'int8': case 'uint8': case 'int16': case 'uint16': case 'int32': case 'uint32':
return parseInt( n );
case 'float': case 'double': case 'float32': case 'float64':
return parseFloat( n );
}
}
function parseASCIIElement( properties, tokens ) {
const element = {};
for ( let i = 0; i < properties.length; i ++ ) {
if ( tokens.empty() ) return null;
if ( properties[ i ].type === 'list' ) {
const list = [];
const n = parseASCIINumber( tokens.next(), properties[ i ].countType );
for ( let j = 0; j < n; j ++ ) {
if ( tokens.empty() ) return null;
list.push( parseASCIINumber( tokens.next(), properties[ i ].itemType ) );
}
element[ properties[ i ].name ] = list;
} else {
element[ properties[ i ].name ] = parseASCIINumber( tokens.next(), properties[ i ].type );
}
}
return element;
}
function createBuffer() {
const buffer = {
indices: [],
vertices: [],
normals: [],
uvs: [],
faceVertexUvs: [],
colors: [],
faceVertexColors: []
};
for ( const customProperty of Object.keys( scope.customPropertyMapping ) ) {
buffer[ customProperty ] = [];
}
return buffer;
}
function mapElementAttributes( properties ) {
const elementNames = properties.map( property => {
return property.name;
} );
function findAttrName( names ) {
for ( let i = 0, l = names.length; i < l; i ++ ) {
const name = names[ i ];
if ( elementNames.includes( name ) ) return name;
}
return null;
}
return {
attrX: findAttrName( [ 'x', 'px', 'posx' ] ) || 'x',
attrY: findAttrName( [ 'y', 'py', 'posy' ] ) || 'y',
attrZ: findAttrName( [ 'z', 'pz', 'posz' ] ) || 'z',
attrNX: findAttrName( [ 'nx', 'normalx' ] ),
attrNY: findAttrName( [ 'ny', 'normaly' ] ),
attrNZ: findAttrName( [ 'nz', 'normalz' ] ),
attrS: findAttrName( [ 's', 'u', 'texture_u', 'tx' ] ),
attrT: findAttrName( [ 't', 'v', 'texture_v', 'ty' ] ),
attrR: findAttrName( [ 'red', 'diffuse_red', 'r', 'diffuse_r' ] ),
attrG: findAttrName( [ 'green', 'diffuse_green', 'g', 'diffuse_g' ] ),
attrB: findAttrName( [ 'blue', 'diffuse_blue', 'b', 'diffuse_b' ] ),
};
}
function parseASCII( data, header ) {
// PLY ascii format specification, as per http://en.wikipedia.org/wiki/PLY_(file_format)
const buffer = createBuffer();
const patternBody = /end_header\s+(\S[\s\S]*\S|\S)\s*$/;
let body, matches;
if ( ( matches = patternBody.exec( data ) ) !== null ) {
body = matches[ 1 ].split( /\s+/ );
} else {
body = [ ];
}
const tokens = new ArrayStream( body );
loop: for ( let i = 0; i < header.elements.length; i ++ ) {
const elementDesc = header.elements[ i ];
const attributeMap = mapElementAttributes( elementDesc.properties );
for ( let j = 0; j < elementDesc.count; j ++ ) {
const element = parseASCIIElement( elementDesc.properties, tokens );
if ( ! element ) break loop;
handleElement( buffer, elementDesc.name, element, attributeMap );
}
}
return postProcess( buffer );
}
function postProcess( buffer ) {
let geometry = new BufferGeometry();
// mandatory buffer data
if ( buffer.indices.length > 0 ) {
geometry.setIndex( buffer.indices );
}
geometry.setAttribute( 'position', new Float32BufferAttribute( buffer.vertices, 3 ) );
// optional buffer data
if ( buffer.normals.length > 0 ) {
geometry.setAttribute( 'normal', new Float32BufferAttribute( buffer.normals, 3 ) );
}
if ( buffer.uvs.length > 0 ) {
geometry.setAttribute( 'uv', new Float32BufferAttribute( buffer.uvs, 2 ) );
}
if ( buffer.colors.length > 0 ) {
geometry.setAttribute( 'color', new Float32BufferAttribute( buffer.colors, 3 ) );
}
if ( buffer.faceVertexUvs.length > 0 || buffer.faceVertexColors.length > 0 ) {
geometry = geometry.toNonIndexed();
if ( buffer.faceVertexUvs.length > 0 ) geometry.setAttribute( 'uv', new Float32BufferAttribute( buffer.faceVertexUvs, 2 ) );
if ( buffer.faceVertexColors.length > 0 ) geometry.setAttribute( 'color', new Float32BufferAttribute( buffer.faceVertexColors, 3 ) );
}
// custom buffer data
for ( const customProperty of Object.keys( scope.customPropertyMapping ) ) {
if ( buffer[ customProperty ].length > 0 ) {
geometry.setAttribute(
customProperty,
new Float32BufferAttribute(
buffer[ customProperty ],
scope.customPropertyMapping[ customProperty ].length
)
);
}
}
geometry.computeBoundingSphere();
return geometry;
}
function handleElement( buffer, elementName, element, cacheEntry ) {
if ( elementName === 'vertex' ) {
buffer.vertices.push( element[ cacheEntry.attrX ], element[ cacheEntry.attrY ], element[ cacheEntry.attrZ ] );
if ( cacheEntry.attrNX !== null && cacheEntry.attrNY !== null && cacheEntry.attrNZ !== null ) {
buffer.normals.push( element[ cacheEntry.attrNX ], element[ cacheEntry.attrNY ], element[ cacheEntry.attrNZ ] );
}
if ( cacheEntry.attrS !== null && cacheEntry.attrT !== null ) {
buffer.uvs.push( element[ cacheEntry.attrS ], element[ cacheEntry.attrT ] );
}
if ( cacheEntry.attrR !== null && cacheEntry.attrG !== null && cacheEntry.attrB !== null ) {
_color.setRGB(
element[ cacheEntry.attrR ] / 255.0,
element[ cacheEntry.attrG ] / 255.0,
element[ cacheEntry.attrB ] / 255.0
).convertSRGBToLinear();
buffer.colors.push( _color.r, _color.g, _color.b );
}
for ( const customProperty of Object.keys( scope.customPropertyMapping ) ) {
for ( const elementProperty of scope.customPropertyMapping[ customProperty ] ) {
buffer[ customProperty ].push( element[ elementProperty ] );
}
}
} else if ( elementName === 'face' ) {
const vertex_indices = element.vertex_indices || element.vertex_index; // issue #9338
const texcoord = element.texcoord;
if ( vertex_indices.length === 3 ) {
buffer.indices.push( vertex_indices[ 0 ], vertex_indices[ 1 ], vertex_indices[ 2 ] );
if ( texcoord && texcoord.length === 6 ) {
buffer.faceVertexUvs.push( texcoord[ 0 ], texcoord[ 1 ] );
buffer.faceVertexUvs.push( texcoord[ 2 ], texcoord[ 3 ] );
buffer.faceVertexUvs.push( texcoord[ 4 ], texcoord[ 5 ] );
}
} else if ( vertex_indices.length === 4 ) {
buffer.indices.push( vertex_indices[ 0 ], vertex_indices[ 1 ], vertex_indices[ 3 ] );
buffer.indices.push( vertex_indices[ 1 ], vertex_indices[ 2 ], vertex_indices[ 3 ] );
}
// face colors
if ( cacheEntry.attrR !== null && cacheEntry.attrG !== null && cacheEntry.attrB !== null ) {
_color.setRGB(
element[ cacheEntry.attrR ] / 255.0,
element[ cacheEntry.attrG ] / 255.0,
element[ cacheEntry.attrB ] / 255.0
).convertSRGBToLinear();
buffer.faceVertexColors.push( _color.r, _color.g, _color.b );
buffer.faceVertexColors.push( _color.r, _color.g, _color.b );
buffer.faceVertexColors.push( _color.r, _color.g, _color.b );
}
}
}
function binaryReadElement( at, properties ) {
const element = {};
let read = 0;
for ( let i = 0; i < properties.length; i ++ ) {
const property = properties[ i ];
const valueReader = property.valueReader;
if ( property.type === 'list' ) {
const list = [];
const n = property.countReader.read( at + read );
read += property.countReader.size;
for ( let j = 0; j < n; j ++ ) {
list.push( valueReader.read( at + read ) );
read += valueReader.size;
}
element[ property.name ] = list;
} else {
element[ property.name ] = valueReader.read( at + read );
read += valueReader.size;
}
}
return [ element, read ];
}
function setPropertyBinaryReaders( properties, body, little_endian ) {
function getBinaryReader( dataview, type, little_endian ) {
switch ( type ) {
// corespondences for non-specific length types here match rply:
case 'int8': case 'char': return { read: ( at ) => {
return dataview.getInt8( at );
}, size: 1 };
case 'uint8': case 'uchar': return { read: ( at ) => {
return dataview.getUint8( at );
}, size: 1 };
case 'int16': case 'short': return { read: ( at ) => {
return dataview.getInt16( at, little_endian );
}, size: 2 };
case 'uint16': case 'ushort': return { read: ( at ) => {
return dataview.getUint16( at, little_endian );
}, size: 2 };
case 'int32': case 'int': return { read: ( at ) => {
return dataview.getInt32( at, little_endian );
}, size: 4 };
case 'uint32': case 'uint': return { read: ( at ) => {
return dataview.getUint32( at, little_endian );
}, size: 4 };
case 'float32': case 'float': return { read: ( at ) => {
return dataview.getFloat32( at, little_endian );
}, size: 4 };
case 'float64': case 'double': return { read: ( at ) => {
return dataview.getFloat64( at, little_endian );
}, size: 8 };
}
}
for ( let i = 0, l = properties.length; i < l; i ++ ) {
const property = properties[ i ];
if ( property.type === 'list' ) {
property.countReader = getBinaryReader( body, property.countType, little_endian );
property.valueReader = getBinaryReader( body, property.itemType, little_endian );
} else {
property.valueReader = getBinaryReader( body, property.type, little_endian );
}
}
}
function parseBinary( data, header ) {
const buffer = createBuffer();
const little_endian = ( header.format === 'binary_little_endian' );
const body = new DataView( data, header.headerLength );
let result, loc = 0;
for ( let currentElement = 0; currentElement < header.elements.length; currentElement ++ ) {
const elementDesc = header.elements[ currentElement ];
const properties = elementDesc.properties;
const attributeMap = mapElementAttributes( properties );
setPropertyBinaryReaders( properties, body, little_endian );
for ( let currentElementCount = 0; currentElementCount < elementDesc.count; currentElementCount ++ ) {
result = binaryReadElement( loc, properties );
loc += result[ 1 ];
const element = result[ 0 ];
handleElement( buffer, elementDesc.name, element, attributeMap );
}
}
return postProcess( buffer );
}
function extractHeaderText( bytes ) {
let i = 0;
let cont = true;
let line = '';
const lines = [];
const startLine = new TextDecoder().decode( bytes.subarray( 0, 5 ) );
const hasCRNL = /^ply\r\n/.test( startLine );
do {
const c = String.fromCharCode( bytes[ i ++ ] );
if ( c !== '\n' && c !== '\r' ) {
line += c;
} else {
if ( line === 'end_header' ) cont = false;
if ( line !== '' ) {
lines.push( line );
line = '';
}
}
} while ( cont && i < bytes.length );
// ascii section using \r\n as line endings
if ( hasCRNL === true ) i ++;
return { headerText: lines.join( '\r' ) + '\r', headerLength: i };
}
//
let geometry;
const scope = this;
if ( data instanceof ArrayBuffer ) {
const bytes = new Uint8Array( data );
const { headerText, headerLength } = extractHeaderText( bytes );
const header = parseHeader( headerText, headerLength );
if ( header.format === 'ascii' ) {
const text = new TextDecoder().decode( bytes );
geometry = parseASCII( text, header );
} else {
geometry = parseBinary( data, header );
}
} else {
geometry = parseASCII( data, parseHeader( data ) );
}
return geometry;
}
}
class ArrayStream {
constructor( arr ) {
this.arr = arr;
this.i = 0;
}
empty() {
return this.i >= this.arr.length;
}
next() {
return this.arr[ this.i ++ ];
}
}
export { PLYLoader };