A Shaft Culling Tool
نویسنده
چکیده
Shaft culling is a means to accelerate the testing of visibility between two objects. This paper briefly describes an algorithm for shaft culling and various implementation options. The entire code and test harness for the algorithm is available online.
منابع مشابه
Faster Ray Tracing with SIMD Shaft Culling
This paper presents a generic technique for acceleration of ray tracing of polygonal scenes. We propose scheduling rays in a way that forms pyramidal shafts. We show that under certain conditions fulfilled by the corner rays of a shaft, it is possible to immediately and conservatively answer visibility queries for the inner rays without expensive ray traversal through acceleration data structur...
متن کاملA new application of pelvis area data as culling tool to aid in the management of dystocia in heifers.
Although fetomaternal disproportion is the major cause of dystocia in heifers, pelvis area (PA) is not recommended as a culling tool due to its relatively low importance and genetic correlation with calf birth weight (BWT), the most important factor associated with dystocia. The objective of this observational study of 484 limited bred yearling beef heifers was to compare the effects of differe...
متن کاملCauses of culling in dairy cows and its relation to age at culling and interval from calving in Shiraz, Southern Iran
This study was designed to investigate causes of culling in industrial dairy herds in Fars province and to describe the pattern of reason-specific culling with respect to age of animal and interval from calving to culling. A total number of 9 dairy herds were selected for the study and information about culling reasons, birth date, last calving date and culling date was collected for culled cow...
متن کاملCharacterisation and pattern of culling in Holstein-Friesian dairy herds in Khorasan Razavi Province, Northeast of Iran
To describe proportion and pattern of culling in commercial dairy herds of Khorasan Razavi Province, this survey was carried out from 21st March 2008 to 20th March 2009 in 15 industrialized dairy herds. For each culled cow data related to parity at culling, last calving to culling interval and primary reason for culling were recorded. Annual herd exit rate was 20.9%. Out of a total of 652 culle...
متن کاملReasons and risk factors for culling Holstein dairy cows in Morocco
This study was carried out in a commercial herd from 2008 to 2012 in order to determine the most prevalent reasons for culling Holstein cows and to assess the effects of risk factors. Overall, 519 (28.2%) cows were culled for involuntary (98.8%) and voluntary (1.2%) reasons. The involuntary causes of culling were diseases (38.7%), reproduction problems (36.0%), udder disorders (7.7%), lameness ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- J. Graphics, GPU, & Game Tools
دوره 5 شماره
صفحات -
تاریخ انتشار 2000