 | Load a data set with button cards.
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 | Change volume size with dial card.
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 | Change volume thickness (nonuniform change of size).
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 | Move volume: intersect with pointer, click and hold left wand button, and move wand: data set moves as if stuck on a skewer.
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 | Volume pop-up menu: intersect volume and right-click wand to show menu.
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 | Activate region of interest (ROI) mode: in volume pop-up click on ROI card.
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 | ROI mode: intersect ROI box with pointer, click and hold left wand button to drag box, twist to change ROI box size.
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 | Activate clipping plane mode: in volume pop-up click on Clip card.
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 | Clipping plane mode: intersect clipping plane with pointer, left-click on wand and hold to move plane.
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 | When another volume is loaded from the file browser, the previous data sets remain. User can load as many data sets as graphics memory allows.
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 | Pointer check box card (bottom left on left cave wall) activates pointer mode: red sphere at pointer tip can be used to point to features. Pointer length can be adjusted with Length dial.
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 | Color button switches through several pre-set color schemes (works only for single channel data sets).
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 | Pos and Slope cards change opacity transfer function.
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 | G-red, G-green, and G-blue cards change gamma values.
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 | Red channel set to higher gamma value.
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| no image available | Widget snarfing: after a dial has been used, the user can change the dial value without pointing at the dial again by right-clicking while the pointer doesn't intersect anything.
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| no image available | Make screen shot: a left-click on the wand while the wand is within a 1 foot radius from center of eyes creates a screen-shot of front wall and saves it as a TIF file. No visual feedback is given but a text message at the bottom of the left wall.
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| no image available | Rotate data set: by pushing the trackball on the wand the currently selected volume rotates about its center.
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