The A -buffer, an antialiased hidden surface method

  • Authors:
  • Loren Carpenter

  • Affiliations:
  • Computer Graphics Project, Computer Division, Lucasfilm Ltd

  • Venue:
  • SIGGRAPH '84 Proceedings of the 11th annual conference on Computer graphics and interactive techniques
  • Year:
  • 1984

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Abstract

The A-buffer (anti-aliased, area-averaged, accumulation buffer) is a general hidden surface mechanism suited to medium scale virtual memory computers. It resolves visibility among an arbitrary collection of opaque, transparent, and intersecting objects. Using an easy to compute Fourier window (box filter), it increases the effective image resolution many times over the Z-buffer, with a moderate increase in cost. The A-buffer is incorporated into the REYES 3-D rendering system at Lucasfilm and was used successfully in the “Genesis Demo” sequence in Star Trek II.