Worcester Polytechnic Institute Electronic Theses and Dissertations Collection

Title page for ETD etd-011712-095412

Document Typethesis
Author NameBlanchette, Damon Arthur
Email Address damonbla at gmail.com
TitleAdaptive Spectral Mapping for Real-Time Dispersive Refraction
DepartmentComputer Science
  • Emmanuel Agu, Advisor
  • Matt Ward, Reader
  • Craig Wills, Department Head
  • Keywords
  • graphics
  • real-time
  • screen-space
  • dispersion
  • spectral rendering
  • Date of Presentation/Defense2011-12-08
    Availability unrestricted


    Spectral rendering, or the synthesis of images by taking into account the wavelengths of light, allows effects otherwise impossible with other methods. One of these effects is dispersion, the phenomenon that creates a rainbow when white light shines through a prism. Spectral rendering has previously remained in the realm of off-line rendering (with a few exceptions) due to the extensive computation required to keep track of individual light wavelengths. Caustics, the focusing and de-focusing of light through a refractive medium, can be interpreted as a special case of dispersion where all the wavelengths travel together. This thesis extends Adaptive Caustic Mapping, a previously proposed caustics mapping algorithm, to handle spectral dispersion. Because ACM can display caustics in real-time, it is quite amenable to be extended to handle the more general case of dispersion. A method is presented that runs in screen-space and is fast enough to display plausible dispersion phenomena in real-time at interactive frame rates.

  • blanchette.pdf

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