Press n or j to go to the next uncovered block, b, p or k for the previous block.
| 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 64 65 66 67 68 69 70 71 | import { vec3 } from 'gl-matrix';
import { utilities as csUtils } from '@cornerstonejs/core';
import type { Types } from '@cornerstonejs/core';
import getViewportICamera from '../getViewportICamera';
import { navigatePlanarViewportToPoint } from '../genericViewportToolHelpers';
/**
* Moves a viewport camera (position and focal point) along its view-plane
* normal by the given signed distance in world units. Pan, zoom and
* orientation are untouched.
*
* Native (generic) viewports have no free camera write; they are navigated by
* view reference instead, which snaps to the nearest slice.
*
* Returns true when the camera was moved.
*/
export default function translateViewportAlongNormal(
viewport: Types.IViewport,
distance: number
): boolean {
if (!viewport || !Number.isFinite(distance) || distance === 0) {
return false;
}
// getViewportICamera can throw for viewports without a valid/rendered
// camera; guard it the same way getViewportPlane does so a single bad
// viewport cannot abort a caller iterating over several of them.
let camera;
try {
camera = getViewportICamera(viewport);
} catch {
return false;
}
const viewPlaneNormal = camera?.viewPlaneNormal;
const focalPoint = camera?.focalPoint;
const position = camera?.position;
if (!viewPlaneNormal || !focalPoint || !position) {
return false;
}
const newFocalPoint = vec3.scaleAndAdd(
vec3.create(),
focalPoint,
viewPlaneNormal,
distance
);
const newPosition = vec3.scaleAndAdd(
vec3.create(),
position,
viewPlaneNormal,
distance
);
if (csUtils.isGenericViewport(viewport)) {
return navigatePlanarViewportToPoint(viewport, [
newFocalPoint[0],
newFocalPoint[1],
newFocalPoint[2],
]);
}
viewport.setCamera({
focalPoint: [newFocalPoint[0], newFocalPoint[1], newFocalPoint[2]],
position: [newPosition[0], newPosition[1], newPosition[2]],
});
return true;
}
|