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COMPUTATION OF THE ARC LENGTH FROM THE SHADOW BOUNDARY OF A CAD OBJECT
Linnaeus University, Faculty of Science and Engineering, School of Computer Science, Physics and Mathematics.
2012 (English)Independent thesis Advanced level (degree of Master (Two Years)), 80 credits / 120 HE creditsStudent thesis
Abstract [en]

CAD objects are geometrical descriptions of physical scenes from the real world. Ray tracing is used to project the objects onto a pixel screen. A lit and a shadow zone are formed according to the direction of the incoming field (light) and the orientation of the pixel screen. The arc length along the surface of the object, from the shadow boundary to a point in the lit zone, is computed by means of numerical integration. The arclengths corresponding to two orthogonal directions that are aligned with the pixels on the pixel screen are computed and used for interpolation to obtain the arc length for all directions. A number of simulations for various CAD geometries are made using a ray-tracer implemented in FORTRAN 90.

Place, publisher, year, edition, pages
2012. , 45 p.
Keyword [en]
Ray tracing, arc length, shadow boundary, lit zone, CAD object
National Category
Engineering and Technology
Identifiers
URN: urn:nbn:se:lnu:diva-23039OAI: oai:DiVA.org:lnu-23039DiVA: diva2:578969
Subject / course
Electrical Engineering
Educational program
Electrical Engineering with specialisation in Signal Processing & Wave Propagation, Master Programme, 120 credits
Presentation
2012-12-18, D1136, 15:15 (English)
Uppsok
Physics, Chemistry, Mathematics
Supervisors
Available from: 2012-12-19 Created: 2012-12-19 Last updated: 2012-12-19Bibliographically approved

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CiteExportLink to record
Permanent link

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Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf