All files / tools/src/utilities getViewportICamera.ts

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import { type Types, utilities } from '@cornerstonejs/core';
 
type ViewportICamera = Pick<
  Types.ICamera,
  'focalPoint' | 'position' | 'viewPlaneNormal' | 'viewUp'
>;
 
export default function getViewportICamera(
  viewport: Types.IViewport,
  viewReference: Types.ViewReference = viewport.getViewReference()
): Partial<ViewportICamera> {
  const camera = ((utilities.isGenericViewport(viewport)
    ? viewport.getResolvedView()?.toICamera()
    : undefined) ||
    viewport.getCamera?.() ||
    {}) as Partial<Types.ICamera>;
  const focalPoint = utilities.clonePoint3(
    viewReference?.cameraFocalPoint || camera.focalPoint
  );
  const viewPlaneNormal = utilities.clonePoint3(
    viewReference?.viewPlaneNormal || camera.viewPlaneNormal
  );
  const viewUp = utilities.clonePoint3(viewReference?.viewUp || camera.viewUp);
  const position = utilities.clonePoint3(
    camera.position ||
      (focalPoint &&
        viewPlaneNormal && [
          focalPoint[0] - viewPlaneNormal[0],
          focalPoint[1] - viewPlaneNormal[1],
          focalPoint[2] - viewPlaneNormal[2],
        ])
  );
 
  return {
    focalPoint,
    position,
    viewPlaneNormal,
    viewUp,
  };
}