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import WebworkerPromise from 'webworker-promise';
import macro from 'vtk.js/Sources/macros';
import vtkImageData from 'vtk.js/Sources/Common/DataModel/ImageData';
import vtkDataArray from 'vtk.js/Sources/Common/Core/DataArray';
import vtkPolygon from 'vtk.js/Sources/Common/DataModel/Polygon';
import PaintFilterWorker from 'vtk.js/Sources/Filters/General/PaintFilter/PaintFilter.worker';
const { vtkErrorMacro } = macro;
// ----------------------------------------------------------------------------
// vtkPaintFilter methods
// ----------------------------------------------------------------------------
function vtkPaintFilter(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkPaintFilter');
let worker = null;
let workerPromise = null;
const history = {};
// --------------------------------------------------------------------------
function resetHistory() {
history.index = -1;
history.snapshots = [];
history.labels = [];
}
function pushToHistory(snapshot, label) {
// Clear any "redo" info
const spliceIndex = history.index + 1;
const spliceLength = history.snapshots.length - history.index;
history.snapshots.splice(spliceIndex, spliceLength);
history.labels.splice(spliceIndex, spliceLength);
// Push new snapshot
history.snapshots.push(snapshot);
history.labels.push(label);
history.index++;
}
// --------------------------------------------------------------------------
publicAPI.startStroke = () => {
if (model.labelMap) {
if (!workerPromise) {
worker = new PaintFilterWorker();
workerPromise = new WebworkerPromise(worker);
}
workerPromise.exec('start', {
bufferType: 'Uint8Array',
dimensions: model.labelMap.getDimensions(),
slicingMode: model.slicingMode,
});
}
};
// --------------------------------------------------------------------------
publicAPI.endStroke = () => {
let endStrokePromise;
if (workerPromise) {
endStrokePromise = workerPromise.exec('end');
endStrokePromise.then((strokeBuffer) => {
publicAPI.applyBinaryMask(strokeBuffer);
worker.terminate();
worker = null;
workerPromise = null;
});
}
return endStrokePromise;
};
publicAPI.applyBinaryMask = (maskBuffer) => {
const scalars = model.labelMap.getPointData().getScalars();
const data = scalars.getData();
const maskLabelMap = new Uint8Array(maskBuffer);
let diffCount = 0;
for (let i = 0; i < maskLabelMap.length; i++) {
// maskLabelMap is a binary mask
diffCount += maskLabelMap[i];
}
// Format: [ [index, oldLabel], ...]
// I could use an ArrayBuffer, which would place limits
// on the values of index/old, but will be more efficient.
const snapshot = new Array(diffCount);
const label = model.label;
let diffIdx = 0;
Iif (model.voxelFunc) {
const bgScalars = model.backgroundImage.getPointData().getScalars();
const voxel = [];
for (let i = 0; i < maskLabelMap.length; i++) {
if (maskLabelMap[i]) {
bgScalars.getTuple(i, voxel);
// might not fill up snapshot
if (model.voxelFunc(voxel, i, label)) {
snapshot[diffIdx++] = [i, data[i]];
data[i] = label;
}
}
}
} else {
for (let i = 0; i < maskLabelMap.length; i++) {
if (maskLabelMap[i]) {
if (data[i] !== label) {
snapshot[diffIdx++] = [i, data[i]];
data[i] = label;
}
}
}
}
pushToHistory(snapshot, label);
scalars.setData(data);
scalars.modified();
model.labelMap.modified();
publicAPI.modified();
};
// --------------------------------------------------------------------------
publicAPI.addPoint = (point) => {
if (workerPromise) {
const worldPt = [point[0], point[1], point[2]];
const indexPt = [0, 0, 0];
vec3.transformMat4(indexPt, worldPt, model.maskWorldToIndex);
indexPt[0] = Math.round(indexPt[0]);
indexPt[1] = Math.round(indexPt[1]);
indexPt[2] = Math.round(indexPt[2]);
const spacing = model.labelMap.getSpacing();
const radius = spacing.map((s) => model.radius / s);
workerPromise.exec('paint', { point: indexPt, radius });
}
};
// --------------------------------------------------------------------------
publicAPI.paintRectangle = (point1, point2) => {
if (workerPromise) {
const index1 = [0, 0, 0];
const index2 = [0, 0, 0];
vec3.transformMat4(index1, point1, model.maskWorldToIndex);
vec3.transformMat4(index2, point2, model.maskWorldToIndex);
index1[0] = Math.round(index1[0]);
index1[1] = Math.round(index1[1]);
index1[2] = Math.round(index1[2]);
index2[0] = Math.round(index2[0]);
index2[1] = Math.round(index2[1]);
index2[2] = Math.round(index2[2]);
workerPromise.exec('paintRectangle', {
point1: index1,
point2: index2,
});
}
};
// --------------------------------------------------------------------------
publicAPI.paintEllipse = (center, scale3) => {
if (workerPromise) {
const realCenter = [0, 0, 0];
const origin = [0, 0, 0];
let realScale3 = [0, 0, 0];
vec3.transformMat4(realCenter, center, model.maskWorldToIndex);
vec3.transformMat4(origin, origin, model.maskWorldToIndex);
vec3.transformMat4(realScale3, scale3, model.maskWorldToIndex);
vec3.subtract(realScale3, realScale3, origin);
realScale3 = realScale3.map((s) => (s === 0 ? 0.25 : Math.abs(s)));
workerPromise.exec('paintEllipse', {
center: realCenter,
scale3: realScale3,
});
}
};
// --------------------------------------------------------------------------
publicAPI.canUndo = () => history.index > -1;
// --------------------------------------------------------------------------
publicAPI.paintPolygon = (pointList) => {
if (workerPromise && pointList.length > 0) {
const polygon = vtkPolygon.newInstance();
const poly = [];
for (let i = 0; i < pointList.length / 3; i++) {
poly.push([
pointList[3 * i + 0],
pointList[3 * i + 1],
pointList[3 * i + 2],
]);
}
polygon.setPoints(poly);
if (!polygon.triangulate()) {
console.log('triangulation failed!');
}
const points = polygon.getPointArray();
const triangleList = new Float32Array(points.length);
const numPoints = Math.floor(triangleList.length / 3);
for (let i = 0; i < numPoints; i++) {
const point = points.slice(3 * i, 3 * i + 3);
const voxel = triangleList.subarray(3 * i, 3 * i + 3);
vec3.transformMat4(voxel, point, model.maskWorldToIndex);
}
workerPromise.exec('paintTriangles', {
triangleList,
});
}
};
// --------------------------------------------------------------------------
publicAPI.applyLabelMap = (labelMap) => {
const currentMapData = model.labelMap.getPointData().getScalars().getData();
const newMapData = labelMap.getPointData().getScalars().getData();
// Compute snapshot
const snapshot = [];
for (let i = 0; i < newMapData.length; ++i) {
if (currentMapData[i] !== newMapData[i]) {
snapshot.push([i, currentMapData[i]]);
}
}
pushToHistory(snapshot, model.label);
model.labelMap = labelMap;
publicAPI.modified();
};
// --------------------------------------------------------------------------
publicAPI.undo = () => {
if (history.index > -1) {
const scalars = model.labelMap.getPointData().getScalars();
const data = scalars.getData();
const snapshot = history.snapshots[history.index];
for (let i = 0; i < snapshot.length; i++) {
if (!snapshot[i]) {
break;
}
const [index, oldLabel] = snapshot[i];
data[index] = oldLabel;
}
history.index--;
scalars.setData(data);
scalars.modified();
model.labelMap.modified();
publicAPI.modified();
}
};
// --------------------------------------------------------------------------
publicAPI.canRedo = () => history.index < history.labels.length - 1;
// --------------------------------------------------------------------------
publicAPI.redo = () => {
if (history.index < history.labels.length - 1) {
const scalars = model.labelMap.getPointData().getScalars();
const data = scalars.getData();
const redoLabel = history.labels[history.index + 1];
const snapshot = history.snapshots[history.index + 1];
for (let i = 0; i < snapshot.length; i++) {
if (!snapshot[i]) {
break;
}
const [index] = snapshot[i];
data[index] = redoLabel;
}
history.index++;
scalars.setData(data);
scalars.modified();
model.labelMap.modified();
publicAPI.modified();
}
};
// --------------------------------------------------------------------------
const superSetLabelMap = publicAPI.setLabelMap;
publicAPI.setLabelMap = (lm) => {
if (superSetLabelMap(lm)) {
model.maskWorldToIndex = model.labelMap.getWorldToIndex();
resetHistory();
return true;
}
return false;
};
// --------------------------------------------------------------------------
publicAPI.requestData = (inData, outData) => {
Iif (!model.backgroundImage) {
vtkErrorMacro('No background image');
return;
}
Iif (!model.backgroundImage.getPointData().getScalars()) {
vtkErrorMacro('Background image has no scalars');
return;
}
if (!model.labelMap) {
// clone background image properties
const labelMap = vtkImageData.newInstance(
model.backgroundImage.get('spacing', 'origin', 'direction')
);
labelMap.setDimensions(model.backgroundImage.getDimensions());
labelMap.computeTransforms();
// right now only support 256 labels
const values = new Uint8Array(model.backgroundImage.getNumberOfPoints());
const dataArray = vtkDataArray.newInstance({
numberOfComponents: 1, // labelmap with single component
values,
});
labelMap.getPointData().setScalars(dataArray);
publicAPI.setLabelMap(labelMap);
}
Iif (!model.maskWorldToIndex) {
model.maskWorldToIndex = model.labelMap.getWorldToIndex();
}
const scalars = model.labelMap.getPointData().getScalars();
Iif (!scalars) {
vtkErrorMacro('Mask image has no scalars');
return;
}
model.labelMap.modified();
outData[0] = model.labelMap;
};
// --------------------------------------------------------------------------
// Initialization
// --------------------------------------------------------------------------
resetHistory();
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
backgroundImage: null,
labelMap: null,
maskWorldToIndex: null,
voxelFunc: null,
radius: 1,
label: 0,
slicingMode: null,
};
// ----------------------------------------------------------------------------
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 no input and one output
macro.algo(publicAPI, model, 0, 1);
macro.setGet(publicAPI, model, [
'backgroundImage',
'labelMap',
'maskWorldToIndex',
'voxelFunc',
'label',
'radius',
'slicingMode',
]);
// Object specific methods
vtkPaintFilter(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(extend, 'vtkPaintFilter');
// ----------------------------------------------------------------------------
export default { newInstance, extend };
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