@cornerstonejs/core/dist/esm/utilities/getVolumeViewportScrollInfo.js

Cornerstone3D Core

import getVolumeSliceRangeInfo from './getVolumeSliceRangeInfo.js';
function getVolumeViewportScrollInfo(viewport, volumeId, useSlabThickness = false) {
    const { sliceRange, spacingInNormalDirection, camera } = getVolumeSliceRangeInfo(viewport, volumeId, useSlabThickness);
    const { min, max, current } = sliceRange;
    const range = max - min;
    const numScrollSteps = range === 0 ? 0 : Math.round(range / spacingInNormalDirection);
    const fraction = range === 0 ? 0 : (current - min) / range;
    const floatingStepNumber = fraction * numScrollSteps;
    const currentStepIndex = Number.isFinite(floatingStepNumber)
        ? Math.round(floatingStepNumber)
        : 0;
    return {
        numScrollSteps,
        currentStepIndex,
        sliceRangeInfo: {
            sliceRange,
            spacingInNormalDirection,
            camera,
        },
    };
}
export default getVolumeViewportScrollInfo;