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import macro from 'vtk.js/Sources/macros';
import vtkAbstractImageMapper from 'vtk.js/Sources/Rendering/Core/AbstractImageMapper';
import * as pickingHelper from 'vtk.js/Sources/Rendering/Core/AbstractImageMapper/helper';
import * as vtkMath from 'vtk.js/Sources/Common/Core/Math';
import CoincidentTopologyHelper from 'vtk.js/Sources/Rendering/Core/Mapper/CoincidentTopologyHelper';
const { staticOffsetAPI, otherStaticMethods } = CoincidentTopologyHelper;
const { SlicingMode } = Constants;
// ----------------------------------------------------------------------------
// vtkImageMapper methods
// ----------------------------------------------------------------------------
function vtkImageMapper(publicAPI, model) {
// Set our className
model.classHierarchy.push('vtkImageMapper');
publicAPI.getSliceAtPosition = (pos) => {
const image = publicAPI.getCurrentImage();
let pos3;
if (pos.length === 3) {
pos3 = pos;
} else if (Number.isFinite(pos)) {
const bds = image.getBounds();
switch (model.slicingMode) {
case SlicingMode.X:
pos3 = [pos, (bds[3] + bds[2]) / 2, (bds[5] + bds[4]) / 2];
break;
case SlicingMode.Y:
pos3 = [(bds[1] + bds[0]) / 2, pos, (bds[5] + bds[4]) / 2];
break;
case SlicingMode.Z:
pos3 = [(bds[1] + bds[0]) / 2, (bds[3] + bds[2]) / 2, pos];
break;
default:
break;
}
}
const ijk = [0, 0, 0];
image.worldToIndex(pos3, ijk);
const ex = image.getExtent();
const { ijkMode } = publicAPI.getClosestIJKAxis();
let slice = 0;
switch (ijkMode) {
case SlicingMode.I:
slice = vtkMath.clampValue(ijk[0], ex[0], ex[1]);
break;
case SlicingMode.J:
slice = vtkMath.clampValue(ijk[1], ex[2], ex[3]);
break;
case SlicingMode.K:
slice = vtkMath.clampValue(ijk[2], ex[4], ex[5]);
break;
default:
return 0;
}
return slice;
};
publicAPI.setSliceFromCamera = (cam) => {
const fp = cam.getFocalPoint();
switch (model.slicingMode) {
case SlicingMode.I:
case SlicingMode.J:
case SlicingMode.K:
{
const slice = publicAPI.getSliceAtPosition(fp);
publicAPI.setSlice(slice);
}
break;
case SlicingMode.X:
publicAPI.setSlice(fp[0]);
break;
case SlicingMode.Y:
publicAPI.setSlice(fp[1]);
break;
case SlicingMode.Z:
publicAPI.setSlice(fp[2]);
break;
default:
break;
}
};
publicAPI.setXSlice = (id) => {
publicAPI.setSlicingMode(SlicingMode.X);
publicAPI.setSlice(id);
};
publicAPI.setYSlice = (id) => {
publicAPI.setSlicingMode(SlicingMode.Y);
publicAPI.setSlice(id);
};
publicAPI.setZSlice = (id) => {
publicAPI.setSlicingMode(SlicingMode.Z);
publicAPI.setSlice(id);
};
publicAPI.setISlice = (id) => {
publicAPI.setSlicingMode(SlicingMode.I);
publicAPI.setSlice(id);
};
publicAPI.setJSlice = (id) => {
publicAPI.setSlicingMode(SlicingMode.J);
publicAPI.setSlice(id);
};
publicAPI.setKSlice = (id) => {
publicAPI.setSlicingMode(SlicingMode.K);
publicAPI.setSlice(id);
};
publicAPI.getSlicingModeNormal = () => {
const out = [0, 0, 0];
const mat3 = publicAPI.getCurrentImage().getDirection();
switch (model.slicingMode) {
case SlicingMode.X:
out[0] = 1;
break;
case SlicingMode.Y:
out[1] = 1;
break;
case SlicingMode.Z:
out[2] = 1;
break;
case SlicingMode.I:
vtkMath.multiply3x3_vect3(mat3, [1, 0, 0], out);
break;
case SlicingMode.J:
vtkMath.multiply3x3_vect3(mat3, [0, 1, 0], out);
break;
case SlicingMode.K:
vtkMath.multiply3x3_vect3(mat3, [0, 0, 1], out);
break;
default:
break;
}
return out;
};
function computeClosestIJKAxis() {
let xyzMode;
switch (model.slicingMode) {
case SlicingMode.X:
xyzMode = 0;
break;
case SlicingMode.Y:
xyzMode = 1;
break;
case SlicingMode.Z:
xyzMode = 2;
break;
default:
model.closestIJKAxis = {
ijkMode: model.slicingMode,
flip: false,
};
return;
}
// The direction matrix in vtkImageData is the indexToWorld rotation matrix
// with a column-major data layout since it is stored as a WebGL matrix.
const direction = publicAPI.getCurrentImage().getDirection();
const newMatrix = vtkMath.getSparseOrthogonalMatrix(direction);
// With {foo}Vector filled with 0s except at {foo}Mode position where it is 1
// We have xyzVector = (+/-) newMatrix * ijkVector
let ijkMode = 0;
for (; ijkMode < 3; ++ijkMode) {
if (newMatrix[xyzMode + 3 * ijkMode] !== 0) {
break;
}
}
const flip = newMatrix[xyzMode + 3 * ijkMode] < 0;
model.closestIJKAxis = { ijkMode, flip };
}
publicAPI.setSlicingMode = (mode) => {
if (model.slicingMode === mode) {
return;
}
model.slicingMode = mode;
if (publicAPI.getCurrentImage()) {
computeClosestIJKAxis();
}
publicAPI.modified();
};
publicAPI.getClosestIJKAxis = () => {
if (
(model.closestIJKAxis === undefined ||
model.closestIJKAxis.ijkMode === SlicingMode.NONE) &&
publicAPI.getCurrentImage()
) {
computeClosestIJKAxis();
}
return model.closestIJKAxis;
};
publicAPI.getBounds = () => {
const image = publicAPI.getCurrentImage();
Iif (!image) {
return vtkMath.createUninitializedBounds();
}
if (!model.useCustomExtents) {
return image.getBounds();
}
const ex = model.customDisplayExtent.slice();
const { ijkMode } = publicAPI.getClosestIJKAxis();
let nSlice = model.slice;
if (ijkMode !== model.slicingMode) {
// If not IJK slicing, get the IJK slice from the XYZ position/slice
nSlice = publicAPI.getSliceAtPosition(model.slice);
}
switch (ijkMode) {
case SlicingMode.I:
ex[0] = nSlice;
ex[1] = nSlice;
break;
case SlicingMode.J:
ex[2] = nSlice;
ex[3] = nSlice;
break;
case SlicingMode.K:
ex[4] = nSlice;
ex[5] = nSlice;
break;
default:
break;
}
return image.extentToBounds(ex);
};
publicAPI.getBoundsForSlice = (slice = model.slice, halfThickness = 0) => {
const image = publicAPI.getCurrentImage();
if (!image) {
return vtkMath.createUninitializedBounds();
}
const extent = image.getSpatialExtent();
const { ijkMode } = publicAPI.getClosestIJKAxis();
let nSlice = slice;
if (ijkMode !== model.slicingMode) {
// If not IJK slicing, get the IJK slice from the XYZ position/slice
nSlice = publicAPI.getSliceAtPosition(slice);
}
switch (ijkMode) {
case SlicingMode.I:
extent[0] = nSlice - halfThickness;
extent[1] = nSlice + halfThickness;
break;
case SlicingMode.J:
extent[2] = nSlice - halfThickness;
extent[3] = nSlice + halfThickness;
break;
case SlicingMode.K:
extent[4] = nSlice - halfThickness;
extent[5] = nSlice + halfThickness;
break;
default:
break;
}
return image.extentToBounds(extent);
};
publicAPI.intersectWithLineForPointPicking = (p1, p2) =>
pickingHelper.intersectWithLineForPointPicking(p1, p2, publicAPI);
publicAPI.intersectWithLineForCellPicking = (p1, p2) =>
pickingHelper.intersectWithLineForCellPicking(p1, p2, publicAPI);
publicAPI.getCurrentImage = () => publicAPI.getInputData();
}
// ----------------------------------------------------------------------------
// Object factory
// ----------------------------------------------------------------------------
const DEFAULT_VALUES = {
slicingMode: SlicingMode.NONE,
closestIJKAxis: { ijkMode: SlicingMode.NONE, flip: false },
renderToRectangle: false,
sliceAtFocalPoint: false,
preferSizeOverAccuracy: false, // Whether to use halfFloat representation of float, when it is inaccurate
};
// ----------------------------------------------------------------------------
export function extend(publicAPI, model, initialValues = {}) {
Object.assign(model, DEFAULT_VALUES, initialValues);
// Build VTK API
vtkAbstractImageMapper.extend(publicAPI, model, initialValues);
macro.get(publicAPI, model, ['slicingMode']);
macro.setGet(publicAPI, model, [
'closestIJKAxis',
'renderToRectangle',
'sliceAtFocalPoint',
'preferSizeOverAccuracy',
]);
CoincidentTopologyHelper.implementCoincidentTopologyMethods(publicAPI, model);
// Object methods
vtkImageMapper(publicAPI, model);
}
// ----------------------------------------------------------------------------
export const newInstance = macro.newInstance(extend, 'vtkImageMapper');
// ----------------------------------------------------------------------------
export default {
newInstance,
extend,
...staticOffsetAPI,
...otherStaticMethods,
...Constants,
};
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