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import {
FormatTypes,
TextureCoordinatesName,
} from 'vtk.js/Sources/IO/Geometry/PLYWriter/Constants';
const { vtkErrorMacro, vtkWarningMacro } = macro;
// ----------------------------------------------------------------------------
// vtkPLYWriter methods
// ----------------------------------------------------------------------------
const writeHeader = (
polyData,
fileFormat,
fileType,
headerComments,
textureFileName,
textureCoordinatesName,
vertexCount,
faceListLength,
withNormals,
withUVs,
withColors,
withIndices
) => {
const isBinary = fileFormat !== FormatTypes.ASCII;
let format;
if (isBinary) {
format = fileType ? 'binary_little_endian' : 'binary_big_endian';
} else format = 'ascii';
headerComments.unshift('VTK.js generated PLY File');
if (textureFileName) {
headerComments.push(`TextureFile ${textureFileName}`);
}
const commentElements = headerComments
.map((comment) => `comment ${comment}`)
.join('\n');
const header = [
'ply',
`format ${format} 1.0`,
`${commentElements}`,
`element vertex ${vertexCount}`,
'property float x',
'property float y',
'property float z',
];
// normals
if (withNormals) {
header.push('property float nx', 'property float ny', 'property float nz');
}
// uvs
if (withUVs) {
header.push(
`property float ${textureCoordinatesName[0]}`,
`property float ${textureCoordinatesName[1]}`
);
}
// colors
if (withColors) {
header.push(
'property uchar red',
'property uchar green',
'property uchar blue'
);
}
// faces
if (withIndices) {
header.push(
`element face ${faceListLength}`,
'property list uchar int vertex_indices'
);
}
header.push('end_header\n');
return header.join('\n');
};
const binaryWriter = () => {
let output;
let vOffset;
let fOffset;
const indexByteCount = 4;
let ft;
return {
init: (polyData) => {},
writeHeader: (
polyData,
fileFormat,
fileType,
headerComments,
textureFileName,
textureCoordinatesName,
numPts,
numPolys,
withNormals,
withUVs,
withColors,
withIndices
) => {
const vertexCount = polyData.getPoints().getNumberOfPoints();
ft = fileType;
// 1 byte shape descriptor
// 3 vertex indices at ${indexByteCount} bytes
const faceListLength = withIndices
? numPolys * (indexByteCount * 3 + 1)
: 0;
// 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 +
(withNormals ? 4 * 3 : 0) +
(withUVs ? 4 * 2 : 0) +
(withColors ? 3 : 0));
const header = writeHeader(
polyData,
fileFormat,
fileType,
headerComments,
textureFileName,
textureCoordinatesName,
numPts,
numPolys,
withNormals,
withUVs,
withColors,
withIndices
);
const headerBin = new TextEncoder().encode(header);
output = new DataView(
new ArrayBuffer(headerBin.length + vertexListLength + faceListLength)
);
new Uint8Array(output.buffer).set(headerBin, 0);
vOffset = headerBin.length;
fOffset = vOffset + vertexListLength;
},
writeVertice: (x, y, z, nx, ny, nz, u, v, r, g, b) => {
// xyz
output.setFloat32(vOffset, x, ft);
vOffset += 4;
output.setFloat32(vOffset, y, ft);
vOffset += 4;
output.setFloat32(vOffset, z, ft);
vOffset += 4;
// nxnynz
if (nx !== null && ny !== null && nz !== null) {
output.setFloat32(vOffset, nx, ft);
vOffset += 4;
output.setFloat32(vOffset, ny, ft);
vOffset += 4;
output.setFloat32(vOffset, nz, ft);
vOffset += 4;
}
// uv
if (u !== null && v !== null) {
output.setFloat32(vOffset, u, ft);
vOffset += 4;
output.setFloat32(vOffset, v, ft);
vOffset += 4;
}
// rgb
if (r !== null && g !== null && b !== null) {
output.setUint8(vOffset, r);
vOffset += 1;
output.setUint8(vOffset, g);
vOffset += 1;
output.setUint8(vOffset, b);
vOffset += 1;
}
},
writeFace: (n, x, y, z) => {
output.setUint8(fOffset, n);
fOffset += 1;
output.setUint32(fOffset, x, ft);
fOffset += indexByteCount;
output.setUint32(fOffset, y, ft);
fOffset += indexByteCount;
output.setUint32(fOffset, z, ft);
fOffset += indexByteCount;
},
writeFooter: (polyData) => {},
getOutputData: () => output,
};
};
const asciiWriter = () => {
let fileContent = '';
return {
init: (polyData) => {},
writeHeader: (
polyData,
fileFormat,
fileType,
headerComments,
textureFileName,
textureCoordinatesName,
numPts,
numPolys,
withNormals,
withUVs,
withColors,
withIndices
) => {
fileContent += writeHeader(
polyData,
fileFormat,
fileType,
headerComments,
textureFileName,
textureCoordinatesName,
numPts,
numPolys,
withNormals,
withUVs,
withColors,
withIndices
);
},
writeVertice: (x, y, z, nx, ny, nz, u, v, r, g, b) => {
fileContent += `${x} ${y} ${z}`;
if (nx !== null && ny !== null && nz !== null) {
fileContent += ` ${nx} ${ny} ${nz}`;
}
if (u !== null && v !== null) {
fileContent += ` ${u} ${v}`;
}
if (r !== null && g !== null && b !== null) {
fileContent += ` ${r} ${g} ${b}`;
}
fileContent += '\n';
},
writeFace: (n, x, y, z) => {
fileContent += `${n} ${x} ${y} ${z}\n`;
},
writeFooter: (polyData) => {},
getOutputData: () => fileContent,
};
};
function writePLY(
polyData,
format,
dataByteOrder,
headerComments,
textureFileName,
textureCoordinatesName,
transform,
withNormals,
withUVs,
withColors,
withIndices
) {
const inPts = polyData.getPoints();
const polys = polyData.getPolys();
if (inPts === null || polys === null) {
vtkErrorMacro('No data to write!');
}
let writer = null;
if (format === FormatTypes.BINARY) {
writer = binaryWriter();
} else if (format === FormatTypes.ASCII) {
writer = asciiWriter();
} else {
vtkErrorMacro('Invalid type format');
}
let tCoordsName = textureCoordinatesName;
if (typeof textureCoordinatesName === 'undefined') {
vtkWarningMacro(
'Invalid TextureCoordinatesName value, fallback to default uv values'
);
tCoordsName = TextureCoordinatesName.UV;
}
writer.init(polyData);
const numPts = inPts.getNumberOfPoints();
const numPolys = polys.getNumberOfCells();
// textureCoords / uvs
const textureCoords = polyData.getPointData().getTCoords();
// eslint-disable-next-line no-param-reassign
withUVs = !(textureCoords === null);
// scalars / colors
const scalars = polyData.getPointData().getScalars();
// eslint-disable-next-line no-param-reassign
withColors = !(scalars === null);
const fileType = dataByteOrder ? 0 : 1;
writer.writeHeader(
polyData,
format,
fileType,
headerComments,
textureFileName,
tCoordsName,
numPts,
numPolys,
withNormals,
withUVs,
withColors,
withIndices
);
const normals = polyData.getPointData().getNormals();
// points / vertices
for (let i = 0; i < numPts; i++) {
// eslint-disable-next-line prefer-const
let p = inPts.getPoint(i);
// TODO: apply transform matrix
if (transform) {
// vec3.transformMat4(p, p, transform);
}
// coords
// divide by 1 to remove trailing zeros
const x = p[0].toPrecision(6) / 1;
const y = p[1].toPrecision(6) / 1;
const z = p[2].toPrecision(6) / 1;
// normals
let nx = null;
let ny = null;
let nz = null;
// uvs
let u = null;
let v = null;
// colors
let r = null;
let g = null;
let b = null;
if (textureCoords) {
u = textureCoords.getData()[i * 2];
v = textureCoords.getData()[i * 2 + 1];
}
if (scalars) {
r = scalars.getData()[i * 3];
g = scalars.getData()[i * 3 + 1];
b = scalars.getData()[i * 3 + 2];
}
if (normals) {
nx = normals.getData()[i * 3];
ny = normals.getData()[i * 3 + 1];
nz = normals.getData()[i * 3 + 2];
}
writer.writeVertice(x, y, z, nx, ny, nz, u, v, r, g, b);
}
// polys / indices
const pd = polys.getData();
for (let i = 0, l = pd.length; i < l; i += 4) {
writer.writeFace(pd[i + 0], pd[i + 1], pd[i + 2], pd[i + 3]);
}
writer.writeFooter(polyData);
return writer.getOutputData();
}
// ----------------------------------------------------------------------------
// Static API
// ----------------------------------------------------------------------------
export const STATIC = {
writePLY,
};
// ----------------------------------------------------------------------------
// vtkPLYWriter methods
// ----------------------------------------------------------------------------
function vtkPLYWriter(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkPLYWriter');
publicAPI.requestData = (inData, outData) => {
const input = inData[0];
if (!input || input.getClassName() !== 'vtkPolyData') {
vtkErrorMacro('Invalid or missing input');
return;
}
outData[0] = writePLY(
input,
model.format,
model.dataByteOrder,
model.headerComments,
model.textureFileName,
model.textureCoordinatesName,
model.transform,
model.withNormals,
model.withUVs,
model.withColors,
model.withIndices
);
};
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
format: FormatTypes.ASCII,
dataByteOrder: 0,
headerComments: [],
textureFileName: null,
textureCoordinatesName: TextureCoordinatesName.UV,
transform: null,
withNormals: true,
withUVs: true,
withColors: true,
withIndices: true,
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Make this a VTK object
macro.obj(publicAPI, model);
// Also make it an algorithm with one input and one output
macro.algo(publicAPI, model, 1, 1);
macro.setGet(publicAPI, model, [
'format',
'dataByteOrder', // binary_little_endian 0 binary_big_endian 1
'headerComments',
'textureFileName',
'textureCoordinatesName',
'transform',
'withNormals',
'withUVs',
'withColors',
'withIndices',
]);
// Object specific methods
vtkPLYWriter(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(extend, 'vtkPLYWriter');
// ----------------------------------------------------------------------------
export default { newInstance, extend, ...STATIC };
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