Manipulating stacks in Voxx2

To open the view window, right-click on the main window and choose View.

The View window displays all of the relevant transformation information. Here you can adjust the main window size and the scale, rotation, and translation of the stack. By selecting Preserve Aspect Ratio you can preserve the relationship of width to height, or the X to Y to Z scale.

If Voxx2 can extract the voxel dimensions from the files when loading volumes it will automatically set the scale based on this information for a starting point. Please keep in mind it has no way of knowing if these values are actually correct. Also, for situations where the Z scale scale factor is large, the visual results are often less than ideal. If your video card supports 3D texture maps, you can reslice the stack when loading the volume. Doubling the number of slices is a good place to start.

Rotation in Voxx2 can be controlled by the mouse or arrow keys. If you drag the mouse while holding the left button down, the image stack will rotate around the X and/or Y axis. Dragging while holding down the middle mouse button (or the thumbwheel on many mice) rotates around the Z axis. The motion along the axes is absolute and not relative to the current orientation.

Translation simply moves the volume along the X, Y, or Z axis for positioning purposes.

Selecting Bounding Box draws a border around the currently rendered volume to illustrate its dimensions. By clicking on the color button you can choose an appropriate color to go with the stack.

Cut planes allow you to render a subset of the current volume and isolate a particular region of interest. Keep in mind that in most cases rendering performance will suffer slightly from this. For faster rendering you are always better off loading a subset of the dataset from a file. The sliders can be dragged or moved with the arrow keys for finer control. The precision of this feature is still under testing. In a future release we hope to add the ability to export the selected subsection for analysis.