SIGMA

Scalable Interfaces for Geometry and Mesh based Applications

SIGMA Release 1.3

Posted by in CGM, Meshkit, MOAB, News, SIGMA

The SIGMA v1.3 release includes a consolidated packaging of all geometry and mesh related components. Details on compatibility of the different tools and dependent libraries are available separately and all questions can be directed to <package>-dev@mcs.anl.gov. Current release contains the following SIGMA tools: Common Geometry Module (CGM) – Version 16.0 Mesh Oriented datABase (MOAB) –...

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SIGMA Release 1.2.1

Posted by in CGM, Meshkit, MOAB, News, SIGMA

SIGMA v1.2.1 Release Notes SIGMA v1.2.1 Release Notes CGM Version 15.1 Enhancements Fixes MOAB Version 4.9.1 Features Enhancements Fixes MeshKit Version 1.4.1 Enhancements Fixes SIGMA v1.2.1 minor release includes a consolidated packaging of all geometry and mesh related components. Details on compatibility of the different tools and dependent libraries are available separately and all questions...

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Frequently Asked Questions (FAQ)

Posted by in CGM

How do I build CGM from scratch? I get warnings about “Attribute type -1 not recognized”? CGM has a “geometry attributes” capability which allows applications to define their own attributes, and write those attributes to the geometric model when the model is saved to a file. Attribute types are registered with the attribute manager upon instantiation of CGM, and are...

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Improving ray tracing performance

Posted by in CGM, MOAB

For some geometries with complex boundaries and many geometry entities, ray-tracing can take too long time. By controlling some options related to geometry faceting process, we can improve the performance and investigate where the problem comes from. You may see a performance improvement if you set a maximum facet edge length. The dagmc_preproc tool can do this. It basically works like...

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Download and Build CGM

Posted by in CGM

Prerequisites: Since CGM is mostly just an interface to various geometry engines, you’ll need one of those engines for CGM to use. There are various options: * Facet-engine: CGM is distributed natively with a Facet-based geometry engine that can be used to reconstruct a continuous geometry from faceted surface mesh representations. While such a mechanism may not yield very accurate...

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What is CGM ?

Posted by in CGM

The Common Geometry Module (CGM) is a code library which provides geometry functionality used for mesh generation and other applications. This functionality includes that commonly found in solid modeling engines, like geometry creation, query and modification; CGMA also includes capabilities not commonly found in solid modeling engines, like geometry decomposition tools and support for shared...

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OCC-CGM

Posted by in CGM

Instructions for building Open.CASCADE 6.6 on a Ubuntu 12.04 machine Download from OpenCASCADE660.tgz Extract to a build area Patch the sources appropriately Configure and build the sources Install the sources Configuring OCC with CGM CGM13.1 is also compatible with occ6.6.0 and you have to patch occ6.6.0 with occ_patches_6.6.0; This version’s build does not need ftgl. A sample configure...

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