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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 | 428x 428x 428x 428x | import type { Types } from '@cornerstonejs/core';
import { BaseVolumeViewport, utilities } from '@cornerstonejs/core';
const { isEqual } = utilities;
const acquisitionMapping = {
toIJK: (ijkPrime) => ijkPrime,
fromIJK: (ijk) => ijk,
type: 'acquistion',
};
const jkMapping = {
toIJK: ([j, k, i]) => [i, j, k],
fromIJK: ([i, j, k]) => [j, k, i],
type: 'jk',
};
const ikMapping = {
toIJK: ([i, k, j]) => [i, j, k],
fromIJK: ([i, j, k]) => [i, k, j],
type: 'ik',
};
/**
* This function returns a set of functions that normalize the viewport plane
* into `i', j', k'` from the image space `i,j,k` such that
* `i', j'` are within viewport indices corresponding to 1 pixel distance on
* the underlying view space.
* As well, the function returns a dimension for the total view space that
* corresponds to a `[0,dimension)` index for the given bounds.
*
* Basically, this allows creating a view or even instantiating a non-acquisition
* plane representation of an MPR view.
*/
export default function normalizeViewportPlane(
viewport: Types.IViewport,
boundsIJK: Types.BoundsIJK
) {
if (!(viewport instanceof BaseVolumeViewport)) {
// This is the case for acquisition plane, which includes all non-volume viewports:
return { ...acquisitionMapping, boundsIJKPrime: boundsIJK };
}
const { viewPlaneNormal } = viewport.getCamera();
// This doesn't really handle non-coplanar views, but it sort of works even for those, so leave it for now.
const mapping =
(isEqual(Math.abs(viewPlaneNormal[0]), 1) && jkMapping) ||
(isEqual(Math.abs(viewPlaneNormal[1]), 1) && ikMapping) ||
(isEqual(Math.abs(viewPlaneNormal[2]), 1) && acquisitionMapping);
if (!mapping) {
// Non-orthogonal to acquisition plane isn't handled, but doesn't prevent
// options from working, so return an error indicator.
return {
toIJK: null,
boundsIJKPrime: null,
fromIJK: null,
error: `Only mappings orthogonal to acquisition plane are permitted, but requested ${viewPlaneNormal}`,
};
}
return { ...mapping, boundsIJKPrime: mapping.fromIJK(boundsIJK) };
}
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