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#Brl cad nurbs software#

Adaptation is quicker when we are in control of the resources. Exclusive use of commercial ray-tracer tied to a single provider: still left with a risk for our core business.

Improved tools for dealing with faceted models: still left with reduced model fidelity and errors needing correction. Approved for Public Release – Distribution Unlimited 4Īpproved for Public Release – Distribution Unlimited Alternatives to building our own capability More modelers: still left with reduced model fidelity and long timelines due to errors needing correction. If we implement tools to use NURBS models directly, we can speed up preparation of geometry, avoid conversion errors, and maintain model fidelity.

NURBS models currently must be converted to triangles, reducing the fidelity of the models, introducing overlapping regions, and requiring weeks of correction.

NURBS geometry is often provided by manufacturers to our geometry modeling team, but has not been directly useable for vulnerability analyses.

Preparation of geometry is the most time-consuming part of a vulnerability analysis.

Approved for Public Release – Distribution Unlimited 2Īpproved for Public Release – Distribution Unlimited A very simple example of a trimmed NURBS brep Approved for Public Release – Distribution Unlimited 3Īpproved for Public Release – Distribution Unlimited What problem is being solved and why is it important? We are not generating geometry as quickly as needed for vulnerability studies and often must rely on codes that reduce fidelity and introduce errors that must be fixed. I have loosely used the term NURBS in what follows to mean trimmed NURBS breps and their associated details. The resulting collection of patches is a “trimmed NURBS brep”. Pro/E or Rhino, use NURBS in a boundary representation (brep) of geometry, in which faces of an object are modeled by NURBS surface patches that are trimmed to fit together at object edges. They are a mathematical means by which complex (or simple) geometries can be modeled.

#Brl cad nurbs software#

Army Research, Development and Engineering Command NURBS Methodology for BRL-CAD 26 July 2010 Edwin Davisson Software Development Branch Ballistics & NBC Division 41/ Approved for Public Release – Distribution UnlimitedĪpproved for Public Release – Distribution Unlimited First, some definitions:What are NURBS? NURBS are non-uniform rational B-splines.