3D Arrow: A virtual pointer for immersive sculpting

Interaction inside virtual reality applications begins usually with simple selection tasks that can be achieved with moderate degrees of performances. More complex operations like modeling or sculpting inside an immersive environment raises however increased needs for precise 3D selections and visual feedback. In a modeling context any 3D location must be targetable, even ones that are outside of initial reach or not graphically represented. Common interaction techniques in virtual reality do not fullfill these goals without switching between different tools. We present an extensive and precise selection technique called the 3D arrow, used for moving and sculpting inside an immersive terrain modeling application. Composed of a graphic mouse-like pointer constrained inside a workspace defined by the region of space at arm's reach, the 3D arrow allow the users to seamlessly reach and target any position of space within the same interaction paradigm and to rotate the view around the pointer. The graphic appearance of the pointer is carefully designed to help users estimate its global and local position in the terrain scenery.