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feat: add referenceCursors tool (#275)
* added basic cursorCrosshairSync tool with example, TODO: for now cursorSync is displayed regardless of distance, create configurable distance and also sync the position of all viewports over which the mouse is not to scroll to a slice that is close to the currentMousePosition in 3d space * addde stack syncing for StackViewport and syncing for volumeViewport on imageChange events, added configuration for max display distance * refactored tool functions * added comment to possible bug * added configuration options to example * changed look of crosshair to 4 lines with central space * undid local tsconfig change * undid yarn.lock changes * added tool to example-info.json * removed from example-runner because it broke build * readded example and fixed typo * readded example-info and changed example to trigger rebuild * added cleanup for mouseoverElement when tool is disabled * added cleanup when tool gets disabled, this does not get called when toolGroup gets destroyed, might cause remaining listeners * applied naming changes, reworked adding annotation logic * removed event listeners and moved logic to check for stack scrolling into rendering logic * added planeDistanceToPoint to planar utilities * added getClosestStackImageIndexForPoint * rewrote logic to use onCameraModified * updated example-info * fixed bug with 0 being falsey * added logic to remove cursor if wanted * modified toolGroup so that setting a tool active only changes the cursor to default if there is no primary mouse cursor * fixed bug not updating disable cursor * fixed missing parentheses from merge * readded scrollWheel scrolling and api changes * fixed typos
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116 changes: 116 additions & 0 deletions
116
packages/core/src/utilities/getClosestStackImageIndexForPoint.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,116 @@ | ||
| import { vec3 } from 'gl-matrix'; | ||
| import { planar } from '.'; | ||
| import { metaData } from '..'; | ||
| import { IStackViewport, Point3 } from '../types'; | ||
|
|
||
| /** | ||
| * Given a point in 3D space and a viewport it returns the index of the closest imageId, it assumes that stack images are sorted according to their sliceLocation | ||
| * @param point - [A, B, C] coordinates of the point in 3D space | ||
| * @param viewport - The StackViewport to search for the closest imageId | ||
| * | ||
| * @returns The imageId index of the closest imageId or null if no imageId is found | ||
| */ | ||
| export default function getClosestStackImageIndexForPoint( | ||
| point: Point3, | ||
| viewport: IStackViewport | ||
| ): number | null { | ||
| const minimalDistance = calculateMinimalDistanceForStackViewport( | ||
| point, | ||
| viewport | ||
| ); | ||
| return minimalDistance ? minimalDistance.index : null; | ||
| } | ||
|
|
||
| //assumes that imageIds are sorted by slice location | ||
| export function calculateMinimalDistanceForStackViewport( | ||
| point: Point3, | ||
| viewport: IStackViewport | ||
| ): { distance: number; index: number } | null { | ||
| const imageIds = viewport.getImageIds(); | ||
| const currentImageIdIndex = viewport.getCurrentImageIdIndex(); | ||
|
|
||
| if (imageIds.length === 0) return null; | ||
|
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||
| const getDistance = (imageId: string): null | number => { | ||
| const planeMetadata = getPlaneMetadata(imageId); | ||
| if (!planeMetadata) return null; | ||
| const plane = planar.planeEquation( | ||
| planeMetadata.planeNormal, | ||
| planeMetadata.imagePositionPatient | ||
| ); | ||
| const distance = planar.planeDistanceToPoint(plane, point); | ||
| return distance; | ||
| }; | ||
|
|
||
| const closestStack = { | ||
| distance: getDistance(imageIds[currentImageIdIndex]) ?? Infinity, | ||
| index: currentImageIdIndex, | ||
| }; | ||
|
|
||
| //check higher indices | ||
| const higherImageIds = imageIds.slice(currentImageIdIndex + 1); | ||
|
|
||
| for (let i = 0; i < higherImageIds.length; i++) { | ||
| const id = higherImageIds[i]; | ||
| const distance = getDistance(id); | ||
| if (distance === null) continue; | ||
| if (distance <= closestStack.distance) { | ||
| closestStack.distance = distance; | ||
| closestStack.index = i + currentImageIdIndex + 1; | ||
| } else break; | ||
| } | ||
| //check lower indices | ||
| const lowerImageIds = imageIds.slice(0, currentImageIdIndex); | ||
| for (let i = lowerImageIds.length - 1; i >= 0; i--) { | ||
| const id = lowerImageIds[i]; | ||
| const distance = getDistance(id); | ||
| if (distance === null || distance === closestStack.distance) continue; | ||
| if (distance < closestStack.distance) { | ||
| closestStack.distance = distance; | ||
| closestStack.index = i; | ||
| } else break; | ||
| } | ||
| return closestStack.distance === Infinity ? null : closestStack; | ||
| } | ||
|
|
||
| function getPlaneMetadata(imageId: string): null | { | ||
| rowCosines: Point3; | ||
| columnCosines: Point3; | ||
| imagePositionPatient: Point3; | ||
| planeNormal: Point3; | ||
| } { | ||
| const targetImagePlane = metaData.get('imagePlaneModule', imageId); | ||
|
|
||
| if ( | ||
| !targetImagePlane || | ||
| !( | ||
| targetImagePlane.rowCosines instanceof Array && | ||
| targetImagePlane.rowCosines.length === 3 | ||
| ) || | ||
| !( | ||
| targetImagePlane.columnCosines instanceof Array && | ||
| targetImagePlane.columnCosines.length === 3 | ||
| ) || | ||
| !( | ||
| targetImagePlane.imagePositionPatient instanceof Array && | ||
| targetImagePlane.imagePositionPatient.length === 3 | ||
| ) | ||
| ) { | ||
| return null; | ||
| } | ||
| const { | ||
| rowCosines, | ||
| columnCosines, | ||
| imagePositionPatient, | ||
| }: { | ||
| rowCosines: Point3; | ||
| columnCosines: Point3; | ||
| imagePositionPatient: Point3; | ||
| } = targetImagePlane; | ||
|
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||
| const rowVec = vec3.set(vec3.create(), ...rowCosines); | ||
| const colVec = vec3.set(vec3.create(), ...columnCosines); | ||
| const planeNormal = vec3.cross(vec3.create(), rowVec, colVec) as Point3; | ||
|
|
||
| return { rowCosines, columnCosines, imagePositionPatient, planeNormal }; | ||
| } |
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