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== What is BRL-CAD? ==
 
== What is BRL-CAD? ==
Since the late 1950's, computers have been used to assist with the design and study of combat vehicle systems.  The result has been a reduction in the amount of time and money required to take a system from the drawing board to full-scale production as well as increased efficiency in testing and evaluation.
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Since the late 1950's, computers has been used to assist with the design and study of combat vehicle systems.  The result has been a reduction in the amount of time and money required to take a system from the drawing board to full-scale production as well as increased efficiency in testing and evaluation.
  
In 1979, the U.S. Army Ballistic Research Laboratory (BRL) (now the U.S. Army Research Laboratory [ARL]) expressed a need for interactive tools that could assist with the computer simulation and engineering analysis of combat vehicle systems and environments.  When no existing computer-aided design (CAD) package was found to be adequate for this purpose, BRL software developers began assembling a suite of utilities capable of interactively displaying, editing, and interrogating geometric models.  This suite became known as BRL-CAD.
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In 1979, the U.S. Army Ballistic Research Laboratory (BRL) (now the U.S. Army Research Laboratory [ARL]) expressed a need for tools that could assist with the computer simulation and engineering analysis of combat vehicle systems and environments.  When no existing computer-aided design (CAD) package was found to be adequate for this purpose, BRL software developers began assembling a suite of utilities capable of interactively displaying, editing, and interrogating geometric models.  This suite became known as BRL-CAD.
  
 
Now comprising almost a million lines of C code, BRL-CAD has become a powerful constructive solid geometry (CSG) modeling package that has been licensed at over 2,000 sites throughout the world.  It contains a large collection of tools, utilities, and libraries including an interactive geometry editor, ray tracing and generic framebuffer libraries, a network-distributed image-processing and signal-processing capability, and a customizable embedded scripting language.  In addition, BRL-CAD simultaneously supports dual interaction methods, one using a command line and one using a graphical user interface (GUI).
 
Now comprising almost a million lines of C code, BRL-CAD has become a powerful constructive solid geometry (CSG) modeling package that has been licensed at over 2,000 sites throughout the world.  It contains a large collection of tools, utilities, and libraries including an interactive geometry editor, ray tracing and generic framebuffer libraries, a network-distributed image-processing and signal-processing capability, and a customizable embedded scripting language.  In addition, BRL-CAD simultaneously supports dual interaction methods, one using a command line and one using a graphical user interface (GUI).
  
A particular strength of the package lies in its ability to build and analyze realistic models of complex objects using a relatively small set of "primitive shapes."  To do this, the shapes are manipulated by employing the basic Boolean operations of union, subtraction, and intersection.  Another strength of the package is the speed of its ray tracer, which is one of the fastest in existence.  Finally, BRL-CAD users can accurately model objects on scales ranging from the subatomic through the galactic and get "all the details, all the time."
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A particular strength of the package lies in its ability to build and analyze realistic models of complex objects using a relatively small set of "primitive shapes."  To do this, the shapes are manipulated by employing the basic Boolean operations of union, subtraction, and intersection.  Another strength of the package is the speed of its ray tracer, which is one of the fastest in existence.  Finally, BRL-CAD users can accurately model objects on scales ranging from the subatomic through the galactic and get "all the details, all the time."  
  
 
== Why CSG Modeling? ==
 
== Why CSG Modeling? ==

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