Can I center the views on a crosshair position?

sullivak · May 18, 2024, 3:03am

Hi. I can set the location of crosshairs, e.g.
slicer.mrmlScene.GetNodesByClass(‘vtkMRMLCrosshairNode’).GetItemAsObject(0).SetCrosshairRAS(point)

but is there a way to re-center the views on that location?

cpinter · May 20, 2024, 12:20pm

You can use this API:

github.com

Slicer/Slicer/blob/main/Libs/MRML/Core/vtkMRMLSliceNode.h#L373-L387


      
          /// Set the RAS offset of the Slice to the passed values. JumpSlice
          /// and JumpAllSlices use the JumpMode to determine how to jump.
          void JumpSlice(double r, double a, double s);
          void JumpAllSlices(double r, double a, double s);
          /// Jump all slices in the scene.
          /// viewGroup can be used to jump only slice views that are in a specific group.
          /// By default viewGroup is set to -1, which means that all slice views are jumped.
          /// If a non-nullptr exclude pointer is specified then position of that slice node will not be changed.
          /// If jumpMode is set to vtkMRMLSliceNode::DefaultJumpSlice then jump mode set in the slice node will be used.
          /// specified in the slice node will be used.
          static void JumpAllSlices(vtkMRMLScene* scene, double r, double a, double s,
            int jumpMode = vtkMRMLSliceNode::DefaultJumpSlice, int viewGroup = -1, vtkMRMLSliceNode* exclude = nullptr);
          void JumpSliceByOffsetting(double r, double a, double s);
          void JumpSliceByOffsetting(int k, double r, double a, double s);
          void JumpSliceByCentering(double r, double a, double s);

sullivak · May 20, 2024, 9:23pm

Thanks, that did the trick!

Not sure if this is the exact right way, but it worked:

def set_ras_coords(point: list[float]):
    slicer.mrmlScene.GetNodesByClass('vtkMRMLCrosshairNode').GetItemAsObject(0).SetCrosshairRAS(point)
    sliceNodes = list(slicer.mrmlScene.GetNodesByClass('vtkMRMLSliceNode'))
    for sliceNode in sliceNodes:
        sliceNode.JumpAllSlices(point[0], point[1], point[2])

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Can I center the views on a crosshair position?

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