![]() ![]() 8 The boundary representation (brep) primitive–Utah Teapot. 4 Creation of an ebm primitive–BRL–CAD logo. List of Symbols, Abbreviations, and Acronyms TELEPHONE NUMBER (Include area code)Ĥ1 Standard Form 298 (Rev. SUBJECT TERMSīRL-CAD, Primitives, CSG, rtweight, rtarea, hypersampling, raytracer 16. In addition to the database, part of BRL–CAD’s large code base was debugged, specifically the hypersampling feature in rtarea and the error checking in rtweight were corrected by taking into account the sampling rate. The primitive-shape database provides the target describers of BRL–CAD with a representative example of each primitive’s shape and its properties. After the database was completed, a tool was created to perform the same task automatically. The database includes special cases of other primitive shapes, such as a rectangular parallelepiped (rpp), an arbitrary convex solid with 8 vertices (arb8). The goal of this project was to create a database containing one instance of every primitive shape supported by BRL–CAD. However, no database of all (primitive) shapes exists in BRL–CAD. ABSTRACTīallistic Research Laboratory–Computer-Aided Design (BRL–CAD) is an open-source computer-aided design tool that uses constructive solid geometry (CSG) to create models of primitive shapes. SPONSORING/MONITORING AGENCY NAME(S) AND ADDRESS(ES)Īpproved for public release distribution unlimited. US Army Research Laboratory ATTN: RDRL-SLB-S Aberdeen Proving Ground, MD 21005ĩ. PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES) PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing the burden, to Department of Defense, Washington Headquarters Services, Directorate for Information Operations and Reports (0704 -0188), 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection information. Do not return it to the originator.Īrmy Research Laboratory Aberdeen Proving Ground, MD 21005Ĭomprehensive BRL–CAD Primitive Database Mitchell Roberts Survivability/Lethality Analysis Directorate, ARL Destroy this report when it is no longer needed. Citation of manufacturer’s or trade names does not constitute an official endorsement or approval of the use thereof. NOTICES Disclaimers The findings in this report are not to be construed as an official Department of the Army position unless so designated by other authorized documents. Comprehensive BRL–CAD Primitive Database by Mitchell RobertsĪpproved for public release distribution unlimited. ![]()
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