how to create a mouse event inside the 3d slicer view. Need to pick cells from a mesh object from within the 3d slice view of the slicer. Need help

Hi andras, I wrote the following to get the cell using fiducial def onMouseMoved(self, observer,eventid): ras=[0,0,0] crosshairNode.GetCursorPositionRAS(ras) if markupsNode.GetNumberOfFiducials() == 0: markupsNode.AddFiducial(*ras) else: markupsNode.SetNthFiducialPosition(0,*ras) closestCel…

I replaced the crosshair node part with crosshairNode=slicer.util.getNode(‘Crosshair’) crosshairNodeObserverTag = crosshairNode.AddObserver(slicer.vtkMRMLCrosshairNode.CursorPositionModifiedEvent, self.onMouseMoved) but still the program doessnt work. What is wrong in the code. could you please t…

Modify crosshair examples of the script repository step by step. If you encounter any problems then post the script, describe what you do, what you expect to happen, and what happens instead.

I need cells to be selected with mouse of the mesh in attached pic. The script gives me the position of mousecursor. I defined the celllocator and using the findcell to locate the cell. Could you please guide in this respect. What I need to look at. I need to get the pcoords of tetra cell rather th…

The code crashed because you did not build the locator. cell.BuildLocator just prints the address of the BuildLocator method. You need to add () to call the method: cell.BuildLocator(). Another issue is that you mix two approaches: getting point coordinates from markups and crosshair. If you use ma…

Hi Andras, Is there a way to select cells on the surface of mesh using onMouseClicked event. Please suggest. Regards, Saima Safdar

[image] Saima: Is there a way to select cells on the surface of mesh using onMouseClicked event. It should be possible, but the example script that I linked above can already add markups and thus select cells on mouse click.

Andras I need to use only the mouse clicks to select the cells of a mesh without using the fiducials. I understand adding three fiducial points to locate the cell will be not feasible. I would want to select may cells from the surface of the brain where I can apply force. the craniotomy induced pa…

Can you write a bit more about what exactly you would like to achieve? What is your input data? 3D volumes? Segmentations? Surface scans? What would you like to do with the data? What would you like to get as end results?

Data = 3D volumetric brain Mesh What would you like to do with the data? Need to select the surface cells from the brain portion where craniotomy was induced. I will be using the preoperative mri images. What would you like to get as end results? after selecting cells I will save those cells in a …

Select cells of a 3D model

Development

Topic		Replies	Views
Get cell data of a mesh at selected point positions Development	20	1942	November 16, 2021
How to select specific tetrahedron cells from mesh Development	11	725	February 25, 2021
Can I select the modleNode with mouse? Development	1	364	February 20, 2020
How to get the triangle ID on 3D view (mesh) from mouse coordinates in slice view Development	1	212	June 5, 2020
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Select cells of a 3D model

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