@inproceedings{Cornish:2001:VDP,
  citeseer = {http://citeseer.nj.nec.com/cornish01viewdependent.html},
  author = {Derek Cornish and Andrea Rowan and David Luebke},
  booktitle = GI2001,
  editor = {B. Watson and John W. Buchanan},
  optstatus = {doi},
  url = {http://www.graphicsinterface.org/proceedings/2001/158/},
  localfile = {papers/Cornish.2001.VDP.pdf},
  abstract = {We present a novel framework for non-photorealistic rendering
              (NPR) based on view-dependent geometric simplification techniques.
              Following a common thread in NPR research, we represent the model
              as a system of particles, which will be rendered as strokes in the
              final image and which may optionally overlay a polygonal surface.
              Our primary contribution is the use of a hierarchical
              view-dependent clustering algorithm to regulate the number and
              placement of these particles. This algorithm unifies several tasks
              common in artistic rendering, such as placing strokes, regulating
              the screen-space density of strokes, and ensuring inter-frame
              coherence in animated or interactive rendering. View-dependent
              callback functions determine which particles are rendered and how
              to render the associated strokes. The resulting framework is
              interactive and extremely flexible, letting users easily produce
              and experiment with many different art-based rendering styles.},
  title = {{V}iew-{D}ependent {P}articles for {I}nteractive
           {N}on-{P}hotorealistic {R}endering},
  optkeywords = {Non-photorealistic rendering, artistic rendering,
                 view-dependent simplification, view-dependent particles},
  doi = {http://doi.acm.org/10.1145/780986.781005},
  pages = {151--158},
  year = {2001},
  organization = {Canadian Information Processing Society},
}