scholarly journals An Border-Stable Approach to NURBS Surface Rendering for Ray Tracing

10.5772/35659 ◽  
2012 ◽  
Author(s):  
Aleksandrs Sisojevs
Keyword(s):  
Ray Tracing ◽  
Surface Rendering ◽  
Nurbs Surface

Free-Form Reflector Design Using Differential Evolution Algorithm

2007 ◽  
Vol 364-366 ◽  
pp. 138-142
Author(s):  
Bo Yang ◽  
Guo Fan Jin ◽  
Yong Tian Wang
Keyword(s):  
Monte Carlo ◽  
Differential Evolution ◽  
Ray Tracing ◽  
Differential Evolution Algorithm ◽  
Merit Function ◽  
Free Form ◽  
Design Technique ◽  
Merit Functions ◽  
Nurbs Surface ◽  
Evolution Algorithm

NURBS surface representation, combined with Differential Evolution (DE), enables us to perform automated non-imaging reflector design. The overall result is a simple automated nonimaging reflector design technique and only a little data such as desired illuminance distribution and searching limits are needed. Merit functions specific to non-imaging reflector design are presented. Using different merit functions, the generated illuminance distribution can be uniform as well as concentrated. DE is performed to obtain the reflector that generates the desired illuminance distribution. The photometric distributions are calculated through Monte-Carlo ray tracing and the illuminance value is used to calculate the merit function value. The validity of the proposed approach is demonstrated by optimization examples. Almost the same uniform illuminance distribution can be obtained using the algorithm proposed in this paper as that obtained by edge-raymethod. A concentrated illuminance distribution can also be generated using the algorithm proposed.

scholarly journals A New Approach to Accelerate NURBS Surface Rendering on GPU

2009 ◽  
Vol 6 (4) ◽  
pp. 529-538 ◽  
Author(s):  
Hong-Tzong Yau ◽  
Yen-Kun Lin ◽  
Chien-Ting Yeh
Keyword(s):  
Surface Rendering ◽  
Nurbs Surface ◽  
New Approach

Field Estimation in Tunnel and Underground by Ray Tracing Method

2000 ◽  
Vol 54 (3) ◽  
pp. 46-56
Author(s):  
K. Uchida ◽  
D. Da ◽  
C. K. Lee ◽  
T. Matsunaga ◽  
T. Imai ◽  
...  
Keyword(s):  
Ray Tracing ◽  
Ray Tracing Method ◽  
Field Estimation ◽  
Tracing Method
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