A 2D implementation of the IA data structure for the representation and analysis triangle meshes. We have developed a tool based on the LibTri for terrain analysis, which includes state-of-the-art estimators for slope and curvature, and for the extraction of critical points.

Riccardo Fellegara, Federico Iuricich, and Leila De Floriani. Efficient representation and analysis of triangulated terrains. In Proceedings of SIGSPATIAL’17, Los Angeles Area, CA, USA, November 7–10, 2017, 4 pages. doi

• Topological relations extraction
  • single relation
  • batched relations extraction
• Terrain Features
  • Triangle/Edges slope computation
  • Critical Points extraction
• Curvature computation (reference1and reference2)
  • Concentrated curvature
  • Mean Curvature
  • Mean and Gaussian CCurvature
• Dual quad mesh computation

The library requires only the standard template library installed in your system.

Once in the root of the repository type from the command line

cmake CMakeList.txt

and once configured

make

This command generates a portable library file, located into lib folder, as well as some executables in dist folder.

The compilation has been test on linux and mac systems.

The library supports two input formats for the triangulated irregular network:

• off
• tri

For a detailed description of the input formats refer the wiki page.

For a complete list of the command line options refer the wiki page.