@article{Veenstra:1988:LDO,
  number = {1},
  optissn = {0730-0301},
  optreview = {ACM CR 8810-0807},
  author = {Jack Veenstra and Narendra Ahuja},
  localfile = {papers/Veenstra.1988.LDO.pdf},
  optkeywords = {algorithms; hidden line removal; three-dimensional
                 representation},
  optmonth = jan,
  journal = j-TOG,
  doi = {http://doi.acm.org/10.1145/42188.42189},
  volume = {7},
  optstatus = {OK},
  optsubject = {{\bf I.3.3}: Computing Methodologies, COMPUTER GRAPHICS,
                Picture/Image Generation.},
  abstract = {The octree structure represents the space occupied by an object as
              a juxtaposition of cubes, where the sizes and position coordinates
              of the cubes are integer powers of 2 and are defined by a
              recursive decomposition of three-dimensional space. This makes the
              octree structure highly sensitive to object location and
              orientation, and the three-dimensional shape of the represented
              object obscure. It is helpful to be able to see the actual object
              represented by an octree, especially for visual performance
              evaluation of octree algorithms. Presented in this paper is a
              display algorithm that helps visualize the three-dimensional space
              represented by the octree. Given an octree, the algorithm produces
              a line drawing of the objects represented by the octree, using
              parallel projection, from any specified viewpoint with hidden
              lines removed. The order in which the algorithm traverses the
              octree has the property that if node x occludes node y, then node
              x is visited before node y. The algorithm produces a set of long,
              straight visible edge segments corresponding to the visible
              surface of the polyhedral object represented by the octree.
              Examples of some line drawing produced by the algorithm are given.
              The complexity of the algorithm is also discussed.},
  title = {{L}ine {D}rawings of {O}ctree-{R}epresented {O}bjects},
  pages = {61--75},
  year = {1988},
}