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- Introduction to the QRT
- Ray Tracer
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- QRT is a ray tracing image rendering system that runs under a
- variety of operating systems. It has a free format input
- language with extensive error detection and reporting
- capabilities.
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- This manual is divided into several sections as follows:
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- QRT Language Reference:
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- This is a quick reference guide to the QRT command
- language. It can suffice as a tutorial for those familiar
- with ray tracing programs, or function as a guide to QRT
- features not described in the User Manual.
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- QRT User Manual:
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- The User Manual is a more complete tutorial to the QRT
- system. It describes the basic commands and features of
- QRT, without listing every possible command or option. It
- would be a good starting place for beginners. QRT bugs
- and desired enhancements are listed at the end of this
- section.
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- QRT Technical Reference:
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- This is a programmer's guide to the QRT software. It
- describes the structures used by QRT and the design
- philosophy used in creating the system. It should be read
- by anyone attempting to understand or modify the code.
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- QRT Error Codes
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- The error code section explains QRT error messages in
- detail, and lists solutions or suggestions where
- appropriate.
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- Context Free Grammar
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- This is a BNF style context free grammar description of
- the QRT input language. It may be used as a quick
- reference for people familiar with compiler terminology.
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- QRT Sample Programs
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- These are actual QRT input files; they show suggested QRT
- indenting style and give examples of various features.
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- QRT Ray Tracer Page 1 Introduction
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- Machine Specifics
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- The QRT post processor is machine dependent. This section
- contains instructions on using it, as well as information
- on other machine dependent features.
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- References
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- Howard Anton, Elementary Linear Algebra, Anton Textbooks,
- Inc., 1987
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- David F. Rogers, Procedural Elements for Computer Graphics,
- McGraw Hill, Inc., 1985
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- Eric Graham, Graphic Scene Simulations, Amiga World, CW
- Communications/Peterborough, Inc., May/June 1987
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- QRT Ray Tracer Page 2 Introduction
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- Table of Contents
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- Page
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- I. QRT Language Reference Manual
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- A. Introduction .......................... 1
- B. Setup Commands ......................... 3
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- 1. Sky ................................. 3
- 2. Ground .............................. 4
- 3. Focal Length ........................ 5
- 4. First Scan .......................... 5
- 5. Last Scan ........................... 5
- 6. File Name ........................... 6
- 7. Observer ............................ 6
- 8. Lamp ................................ 7
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- C. Primitive Types ........................ 8
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- 1. Sphere .............................. 8
- 2. Parallelogram ....................... 9
- 3. Triangle ............................ 10
- 4. Ring ................................ 11
- 5. Quadratic ........................... 12
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- D. Patterned Surfaces ..................... 14
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- 1. Pattern ............................. 14
- 2. Rectangle ........................... 16
- 3. Circle .............................. 17
- 4. Polygon ............................. 18
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- E. Bounding Boxes ......................... 19
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- 1. Begin Bbox .......................... 19
- 2. End Bbox ............................ 19
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- F. Instances .............................. 20
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- 1. Begin Instances ..................... 20
- 2. End Instances ....................... 21
- 3. Instance Of ......................... 22
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- G. Setting Defaults ....................... 23
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- 1. Default ............................. 23
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- QRT Ray Tracer Page 3 Introduction
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- Table of Contents - Cont.
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- II. QRT Users Manual
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- A. Introduction .......................... 1
- B. Comparison to Other Systems ............ 1
- C. The World .............................. 3
- D. Input Language ......................... 4
- E. Illumination Model ..................... 6
- F. Light Sources .......................... 9
- G. Observer ............................... 10
- H. Filenames .............................. 11
- I. Focal Length ........................... 11
- J. Sky and Ground ......................... 12
- K. Bounding Boxes ......................... 13
- L. Patterns ............................... 15
- M. Instances .............................. 17
- N. Defaults ............................... 19
- O. Problems, Bugs ......................... 20
- P. Possible Enhancements .................. 21
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- III. QRT Technical Reference Manual
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- A. Introduction ........................... 1
- B. C Source file list ..................... 1
- C. Data Structures ........................ 2
- D. Code Description ....................... 4
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- IV. QRT Error Codes
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- V. Context Free Grammar
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- QRT Ray Tracer Page 4 Introduction
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