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NAVAL POSTGRADUATE SCHOOL Monterey, California THESIS NPSNET: PHYSICALLY-BASED MODELING ENHANCEMENTS TO AN OBJECT FILE FORMAT by James G. Monahan September 1991 Thesis Advisor: Michael J. Zyda Co-Advisor: David R. Pratt Approved for public release; distribution is unlimited. SECURITYCLASSIFICATIONOFTHISPAGE REPORT DOCUMENTATION PAGE 1a REPORTSECURITY CLASSIFICATION UNCLASSIFIED 1b. RESTRICTIVE MARKINGS 2a SECURITY CLASSIFICATIONAUTHORITY 5! DISTRIBUTION/AVAILABILITYOF REPORT Approved forpublic release; 2b. dECLASSIFICATION/DOWNgRAdINgschedule distribution is unlimited 4. PERFORMINGORGANIZATION REPORT NUMBER(S) 5 MONITORINGORGANIZATION REPORTNUMBER(S) 6a. NAME OF PERFORMINGORGANIZATION 6b. OFFICE SYMBOL 7a. NAMEOF MONITORINGORGANIZATION (ifapplicable) Naval Postgraduate School CS/ZK Naval Postgraduate School 6c. ADDRESS(City, State, andZIPCode) 7b. ADDRESS(City, State, andZIPCode) Monterey, CA 93943-5000 Monterey, CA 93943-5000 8a NAMEOF FUNDINg/SPONSORINg 8b. OFFICE SYMBOL 9. PROCUREMENT INSTRUMENT IDENTIFICATION NUMBER ORGANIZATION (ifapplicable) 8c. ADDRESS(City, State, andZIPCode) 10. SOURCE OF FUNDING NUMBERS PROGRAM PROJECT TASK WORK UNIT ELEMENT NO. NO. NO. ACCESSION NO. 11. TITLE (IncludeSecurityClassification) NPSNET: PHYSICALLY-BASED MODELING ENHANCEMENTS TO AN OBJECT FILE FORMAT 12. PERSONALAUTHOR(S) Monahan, James G. 13a.TYPE OF REPORT 13b. TIME COVERED 14. DATE OF REPORT(Year, Month, Day) 15. PagE COUNT Master's Thesis from 09/89 to 09/91 September 1991 71 16. SUPPLEMENTARY NOTATION The views expressed in this thesis are those of the authors and do not reflect the official policy orposition ofthe Department ofDefense or the United States Government. 17. cosati codes 18. SUBJECTTERMS(Continueonreverseifnecessaryandidentifybyblocknumber) FIELD GROUP SUB-GROUP Graphics, Animation, Physically-Based Modeling, Simulation, DoD Software Development 19. ABSTRACT(Continueonreverseifnecessaryandidentifybyblocknumber) The Naval Postgraduate School (NPS) has actively explored the design and implementation ofreal-time three- dimensional simulators on low-cost, readily accessible graphics workstations. Many ofthe simulator platforms have had tremendous success due to the fact that a common object format was used. Prototyping time is dramatically reduced when the tedious and often repetitious task ofobject design isreplaced with the simplertask ofmodifying an existing object description file. The current level of support that the NPS Object File Format (OFF) provides is descriptions for lights, lighting, material characteristics, the expected graphics drawing primitives (lines, polygons, surfaces,...), and provisions for texturing and special lighting effects (spotlights, decaling,...). The objectives of this research are the enhancement of the basic OFF structure with information necessary for accurate physically-based rendering in real-time; to construct a library of functions specifying an object's physical properties and the internal/ external forces controlling the object and to develop a tool to rapidly design and test an object's dynamic characteristics. 20. DISTRIBUTION/AVAILABILITYOFABSTRAC1 21. ABSTRACTSECURITYCLASSIFICATION [3 UNCLASSIFIED/UNLIMITED fj SAMEAS RPT. fj DTIC USERS UNCLASSIFIED 22a. NAME OF RESPONSIBLE INDIVIDUAL 22b. TELEPHONE (IncludeAreaCode) 22c. OFFICE SYMBOL Michael J. Zyda (408) 646-2305 CS/ZK DDFORM 1473,84MAR 83APRedition maybe useduntilexhausted SECURITY CLASSIFICATIONOFTHIS PAGE Allothereditionsareobsolete UNCLASSIFIED Approved for public release; distribution is unlimited NPSNET: PHYSICALLY-BASED MODELING ENHANCEMENTS TO AN OBJECT FILE FORMAT by James G. Monahan Lieutenant, United States Navy B.A., Cornell University, 1983 Submitted in partial fulfillment ofthe requirements for the degree of MASTER OF SCIENCE IN COMPUTER SCIENCE from the NAVAL POSTGRADUATE SCHOOL September 1991