You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
521 lines
12 KiB
521 lines
12 KiB
import {
|
|
Matrix3,
|
|
Vector3,
|
|
Color
|
|
} from 'three';
|
|
|
|
/**
|
|
* https://github.com/gkjohnson/ply-exporter-js
|
|
*
|
|
* Usage:
|
|
* const exporter = new PLYExporter();
|
|
*
|
|
* // second argument is a list of options
|
|
* exporter.parse(mesh, data => console.log(data), { binary: true, excludeAttributes: [ 'color' ], littleEndian: true });
|
|
*
|
|
* Format Definition:
|
|
* http://paulbourke.net/dataformats/ply/
|
|
*/
|
|
|
|
class PLYExporter {
|
|
|
|
parse( object, onDone, options ) {
|
|
|
|
// Iterate over the valid meshes in the object
|
|
function traverseMeshes( cb ) {
|
|
|
|
object.traverse( function ( child ) {
|
|
|
|
if ( child.isMesh === true || child.isPoints ) {
|
|
|
|
const mesh = child;
|
|
const geometry = mesh.geometry;
|
|
|
|
if ( geometry.hasAttribute( 'position' ) === true ) {
|
|
|
|
cb( mesh, geometry );
|
|
|
|
}
|
|
|
|
}
|
|
|
|
} );
|
|
|
|
}
|
|
|
|
// Default options
|
|
const defaultOptions = {
|
|
binary: false,
|
|
excludeAttributes: [], // normal, uv, color, index
|
|
littleEndian: false
|
|
};
|
|
|
|
options = Object.assign( defaultOptions, options );
|
|
|
|
const excludeAttributes = options.excludeAttributes;
|
|
let includeIndices = true;
|
|
let includeNormals = false;
|
|
let includeColors = false;
|
|
let includeUVs = false;
|
|
|
|
// count the vertices, check which properties are used,
|
|
// and cache the BufferGeometry
|
|
let vertexCount = 0;
|
|
let faceCount = 0;
|
|
|
|
object.traverse( function ( child ) {
|
|
|
|
if ( child.isMesh === true ) {
|
|
|
|
const mesh = child;
|
|
const geometry = mesh.geometry;
|
|
|
|
const vertices = geometry.getAttribute( 'position' );
|
|
const normals = geometry.getAttribute( 'normal' );
|
|
const uvs = geometry.getAttribute( 'uv' );
|
|
const colors = geometry.getAttribute( 'color' );
|
|
const indices = geometry.getIndex();
|
|
|
|
if ( vertices === undefined ) {
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
vertexCount += vertices.count;
|
|
faceCount += indices ? indices.count / 3 : vertices.count / 3;
|
|
|
|
if ( normals !== undefined ) includeNormals = true;
|
|
|
|
if ( uvs !== undefined ) includeUVs = true;
|
|
|
|
if ( colors !== undefined ) includeColors = true;
|
|
|
|
} else if ( child.isPoints ) {
|
|
|
|
const mesh = child;
|
|
const geometry = mesh.geometry;
|
|
|
|
const vertices = geometry.getAttribute( 'position' );
|
|
vertexCount += vertices.count;
|
|
|
|
includeIndices = false;
|
|
|
|
}
|
|
|
|
} );
|
|
|
|
const tempColor = new Color();
|
|
includeIndices = includeIndices && excludeAttributes.indexOf( 'index' ) === - 1;
|
|
includeNormals = includeNormals && excludeAttributes.indexOf( 'normal' ) === - 1;
|
|
includeColors = includeColors && excludeAttributes.indexOf( 'color' ) === - 1;
|
|
includeUVs = includeUVs && excludeAttributes.indexOf( 'uv' ) === - 1;
|
|
|
|
|
|
if ( includeIndices && faceCount !== Math.floor( faceCount ) ) {
|
|
|
|
// point cloud meshes will not have an index array and may not have a
|
|
// number of vertices that is divisble by 3 (and therefore representable
|
|
// as triangles)
|
|
console.error(
|
|
|
|
'PLYExporter: Failed to generate a valid PLY file with triangle indices because the ' +
|
|
'number of indices is not divisible by 3.'
|
|
|
|
);
|
|
|
|
return null;
|
|
|
|
}
|
|
|
|
const indexByteCount = 4;
|
|
|
|
let header =
|
|
'ply\n' +
|
|
`format ${ options.binary ? ( options.littleEndian ? 'binary_little_endian' : 'binary_big_endian' ) : 'ascii' } 1.0\n` +
|
|
`element vertex ${vertexCount}\n` +
|
|
|
|
// position
|
|
'property float x\n' +
|
|
'property float y\n' +
|
|
'property float z\n';
|
|
|
|
if ( includeNormals === true ) {
|
|
|
|
// normal
|
|
header +=
|
|
'property float nx\n' +
|
|
'property float ny\n' +
|
|
'property float nz\n';
|
|
|
|
}
|
|
|
|
if ( includeUVs === true ) {
|
|
|
|
// uvs
|
|
header +=
|
|
'property float s\n' +
|
|
'property float t\n';
|
|
|
|
}
|
|
|
|
if ( includeColors === true ) {
|
|
|
|
// colors
|
|
header +=
|
|
'property uchar red\n' +
|
|
'property uchar green\n' +
|
|
'property uchar blue\n';
|
|
|
|
}
|
|
|
|
if ( includeIndices === true ) {
|
|
|
|
// faces
|
|
header +=
|
|
`element face ${faceCount}\n` +
|
|
'property list uchar int vertex_index\n';
|
|
|
|
}
|
|
|
|
header += 'end_header\n';
|
|
|
|
|
|
// Generate attribute data
|
|
const vertex = new Vector3();
|
|
const normalMatrixWorld = new Matrix3();
|
|
let result = null;
|
|
|
|
if ( options.binary === true ) {
|
|
|
|
// Binary File Generation
|
|
const headerBin = new TextEncoder().encode( header );
|
|
|
|
// 3 position values at 4 bytes
|
|
// 3 normal values at 4 bytes
|
|
// 3 color channels with 1 byte
|
|
// 2 uv values at 4 bytes
|
|
const vertexListLength = vertexCount * ( 4 * 3 + ( includeNormals ? 4 * 3 : 0 ) + ( includeColors ? 3 : 0 ) + ( includeUVs ? 4 * 2 : 0 ) );
|
|
|
|
// 1 byte shape desciptor
|
|
// 3 vertex indices at ${indexByteCount} bytes
|
|
const faceListLength = includeIndices ? faceCount * ( indexByteCount * 3 + 1 ) : 0;
|
|
const output = new DataView( new ArrayBuffer( headerBin.length + vertexListLength + faceListLength ) );
|
|
new Uint8Array( output.buffer ).set( headerBin, 0 );
|
|
|
|
|
|
let vOffset = headerBin.length;
|
|
let fOffset = headerBin.length + vertexListLength;
|
|
let writtenVertices = 0;
|
|
traverseMeshes( function ( mesh, geometry ) {
|
|
|
|
const vertices = geometry.getAttribute( 'position' );
|
|
const normals = geometry.getAttribute( 'normal' );
|
|
const uvs = geometry.getAttribute( 'uv' );
|
|
const colors = geometry.getAttribute( 'color' );
|
|
const indices = geometry.getIndex();
|
|
|
|
normalMatrixWorld.getNormalMatrix( mesh.matrixWorld );
|
|
|
|
for ( let i = 0, l = vertices.count; i < l; i ++ ) {
|
|
|
|
vertex.fromBufferAttribute( vertices, i );
|
|
|
|
vertex.applyMatrix4( mesh.matrixWorld );
|
|
|
|
|
|
// Position information
|
|
output.setFloat32( vOffset, vertex.x, options.littleEndian );
|
|
vOffset += 4;
|
|
|
|
output.setFloat32( vOffset, vertex.y, options.littleEndian );
|
|
vOffset += 4;
|
|
|
|
output.setFloat32( vOffset, vertex.z, options.littleEndian );
|
|
vOffset += 4;
|
|
|
|
// Normal information
|
|
if ( includeNormals === true ) {
|
|
|
|
if ( normals != null ) {
|
|
|
|
vertex.fromBufferAttribute( normals, i );
|
|
|
|
vertex.applyMatrix3( normalMatrixWorld ).normalize();
|
|
|
|
output.setFloat32( vOffset, vertex.x, options.littleEndian );
|
|
vOffset += 4;
|
|
|
|
output.setFloat32( vOffset, vertex.y, options.littleEndian );
|
|
vOffset += 4;
|
|
|
|
output.setFloat32( vOffset, vertex.z, options.littleEndian );
|
|
vOffset += 4;
|
|
|
|
} else {
|
|
|
|
output.setFloat32( vOffset, 0, options.littleEndian );
|
|
vOffset += 4;
|
|
|
|
output.setFloat32( vOffset, 0, options.littleEndian );
|
|
vOffset += 4;
|
|
|
|
output.setFloat32( vOffset, 0, options.littleEndian );
|
|
vOffset += 4;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// UV information
|
|
if ( includeUVs === true ) {
|
|
|
|
if ( uvs != null ) {
|
|
|
|
output.setFloat32( vOffset, uvs.getX( i ), options.littleEndian );
|
|
vOffset += 4;
|
|
|
|
output.setFloat32( vOffset, uvs.getY( i ), options.littleEndian );
|
|
vOffset += 4;
|
|
|
|
} else {
|
|
|
|
output.setFloat32( vOffset, 0, options.littleEndian );
|
|
vOffset += 4;
|
|
|
|
output.setFloat32( vOffset, 0, options.littleEndian );
|
|
vOffset += 4;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// Color information
|
|
if ( includeColors === true ) {
|
|
|
|
if ( colors != null ) {
|
|
|
|
tempColor
|
|
.fromBufferAttribute( colors, i )
|
|
.convertLinearToSRGB();
|
|
|
|
output.setUint8( vOffset, Math.floor( tempColor.r * 255 ) );
|
|
vOffset += 1;
|
|
|
|
output.setUint8( vOffset, Math.floor( tempColor.g * 255 ) );
|
|
vOffset += 1;
|
|
|
|
output.setUint8( vOffset, Math.floor( tempColor.b * 255 ) );
|
|
vOffset += 1;
|
|
|
|
} else {
|
|
|
|
output.setUint8( vOffset, 255 );
|
|
vOffset += 1;
|
|
|
|
output.setUint8( vOffset, 255 );
|
|
vOffset += 1;
|
|
|
|
output.setUint8( vOffset, 255 );
|
|
vOffset += 1;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if ( includeIndices === true ) {
|
|
|
|
// Create the face list
|
|
|
|
if ( indices !== null ) {
|
|
|
|
for ( let i = 0, l = indices.count; i < l; i += 3 ) {
|
|
|
|
output.setUint8( fOffset, 3 );
|
|
fOffset += 1;
|
|
|
|
output.setUint32( fOffset, indices.getX( i + 0 ) + writtenVertices, options.littleEndian );
|
|
fOffset += indexByteCount;
|
|
|
|
output.setUint32( fOffset, indices.getX( i + 1 ) + writtenVertices, options.littleEndian );
|
|
fOffset += indexByteCount;
|
|
|
|
output.setUint32( fOffset, indices.getX( i + 2 ) + writtenVertices, options.littleEndian );
|
|
fOffset += indexByteCount;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
for ( let i = 0, l = vertices.count; i < l; i += 3 ) {
|
|
|
|
output.setUint8( fOffset, 3 );
|
|
fOffset += 1;
|
|
|
|
output.setUint32( fOffset, writtenVertices + i, options.littleEndian );
|
|
fOffset += indexByteCount;
|
|
|
|
output.setUint32( fOffset, writtenVertices + i + 1, options.littleEndian );
|
|
fOffset += indexByteCount;
|
|
|
|
output.setUint32( fOffset, writtenVertices + i + 2, options.littleEndian );
|
|
fOffset += indexByteCount;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
// Save the amount of verts we've already written so we can offset
|
|
// the face index on the next mesh
|
|
writtenVertices += vertices.count;
|
|
|
|
} );
|
|
|
|
result = output.buffer;
|
|
|
|
} else {
|
|
|
|
// Ascii File Generation
|
|
// count the number of vertices
|
|
let writtenVertices = 0;
|
|
let vertexList = '';
|
|
let faceList = '';
|
|
|
|
traverseMeshes( function ( mesh, geometry ) {
|
|
|
|
const vertices = geometry.getAttribute( 'position' );
|
|
const normals = geometry.getAttribute( 'normal' );
|
|
const uvs = geometry.getAttribute( 'uv' );
|
|
const colors = geometry.getAttribute( 'color' );
|
|
const indices = geometry.getIndex();
|
|
|
|
normalMatrixWorld.getNormalMatrix( mesh.matrixWorld );
|
|
|
|
// form each line
|
|
for ( let i = 0, l = vertices.count; i < l; i ++ ) {
|
|
|
|
vertex.fromBufferAttribute( vertices, i );
|
|
|
|
vertex.applyMatrix4( mesh.matrixWorld );
|
|
|
|
|
|
// Position information
|
|
let line =
|
|
vertex.x + ' ' +
|
|
vertex.y + ' ' +
|
|
vertex.z;
|
|
|
|
// Normal information
|
|
if ( includeNormals === true ) {
|
|
|
|
if ( normals != null ) {
|
|
|
|
vertex.fromBufferAttribute( normals, i );
|
|
|
|
vertex.applyMatrix3( normalMatrixWorld ).normalize();
|
|
|
|
line += ' ' +
|
|
vertex.x + ' ' +
|
|
vertex.y + ' ' +
|
|
vertex.z;
|
|
|
|
} else {
|
|
|
|
line += ' 0 0 0';
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// UV information
|
|
if ( includeUVs === true ) {
|
|
|
|
if ( uvs != null ) {
|
|
|
|
line += ' ' +
|
|
uvs.getX( i ) + ' ' +
|
|
uvs.getY( i );
|
|
|
|
} else {
|
|
|
|
line += ' 0 0';
|
|
|
|
}
|
|
|
|
}
|
|
|
|
// Color information
|
|
if ( includeColors === true ) {
|
|
|
|
if ( colors != null ) {
|
|
|
|
tempColor
|
|
.fromBufferAttribute( colors, i )
|
|
.convertLinearToSRGB();
|
|
|
|
line += ' ' +
|
|
Math.floor( tempColor.r * 255 ) + ' ' +
|
|
Math.floor( tempColor.g * 255 ) + ' ' +
|
|
Math.floor( tempColor.b * 255 );
|
|
|
|
} else {
|
|
|
|
line += ' 255 255 255';
|
|
|
|
}
|
|
|
|
}
|
|
|
|
vertexList += line + '\n';
|
|
|
|
}
|
|
|
|
// Create the face list
|
|
if ( includeIndices === true ) {
|
|
|
|
if ( indices !== null ) {
|
|
|
|
for ( let i = 0, l = indices.count; i < l; i += 3 ) {
|
|
|
|
faceList += `3 ${ indices.getX( i + 0 ) + writtenVertices }`;
|
|
faceList += ` ${ indices.getX( i + 1 ) + writtenVertices }`;
|
|
faceList += ` ${ indices.getX( i + 2 ) + writtenVertices }\n`;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
for ( let i = 0, l = vertices.count; i < l; i += 3 ) {
|
|
|
|
faceList += `3 ${ writtenVertices + i } ${ writtenVertices + i + 1 } ${ writtenVertices + i + 2 }\n`;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
faceCount += indices ? indices.count / 3 : vertices.count / 3;
|
|
|
|
}
|
|
|
|
writtenVertices += vertices.count;
|
|
|
|
} );
|
|
|
|
result = `${ header }${vertexList}${ includeIndices ? `${faceList}\n` : '\n' }`;
|
|
|
|
}
|
|
|
|
if ( typeof onDone === 'function' ) requestAnimationFrame( () => onDone( result ) );
|
|
|
|
return result;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
export { PLYExporter };
|
|
|