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|Title: ||3D rendering using a hemishperical basis|
|Authors: ||Hui, Kai Hei|
|Department: ||Department of Electronic Engineering|
|Issue Date: ||2007|
|Supervisor: ||Supervisor: Dr. Leung, Andrew C S. Assessor: Dr. Fong, Anthony S S|
|Abstract: ||Illuminating 3-Dimension objects under a distant environment is a very time-consuming process. Using spherical harmonic (SH) to represent the reflectance property is a technique for reducing the huge number of shading calculations.
A study on using the SH basis to represent the reflectance, including the visibility, of surface elements and the lighting environment was carried out. Based on the visual C++ 6.0 platform (OpenGL language) and Cg platform, a hardware shading engine for diffuse surfaces with visibility has been built.
In my study, the number of SH coefficients for rendering is varied. The visual result shows that using 25-49 SH coefficients can only simulate a very rough shadow effect. Using 81 SH coefficients can obtain an acceptable shadow effect. Finally, several factors that affect the rendering quality were discussed.|
|Appears in Collections:||Electronic Engineering - Undergraduate Final Year Projects|
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