author = "Ting, Wu Shin and Vidal{\'o}n, Jos{\'e} El{\'{\i}}as Yauri and 
                         Watanabe, Lionis de Souza",
          affiliation = "Unicamp and Unicamp and Unicamp",
                title = "Snapping a Cursor on Volume Data",
            booktitle = "Proceedings...",
                 year = "2011",
               editor = "Lewiner, Thomas and Torres, Ricardo",
         organization = "Conference on Graphics, Patterns and Images, 24. (SIBGRAPI)",
            publisher = "IEEE Computer Society",
              address = "Los Alamitos",
             keywords = "3D Interactions, Ray-casting, Volume visualization, 3D medical 
             abstract = "In this paper we explore the architecture of GPU-based volume 
                         ray-casting to control the cursor movements on surfaces of volume 
                         data only on the basis of their sampled scalar values. This method 
                         does not rely on building a tight proxy geometry nor computing 
                         local iso-surface parametrization. In this setting only a few 
                         instructions should be included in a ray-casting shader: at every 
                         fragment the depth of the closest non-transparent voxel along each 
                         viewing ray is calculated and stored in the depth buffer. Its 
                         application in the manipulation of 3D medical images has, however, 
                         a broad spectrum. Two of them are presented. The proposed 
                         technique is very simple and fast, yet produces very nice and 
                         intuitive visual feedbacks.",
  conference-location = "Macei{\'o}",
      conference-year = "Aug. 28 - 31, 2011",
             language = "en",
           targetfile = "wu_vidalon_watanabe.pdf",
        urlaccessdate = "2020, Apr. 10"