Triangle Mesh - Revision history

Neteler: /* See also */

2013-12-31T18:04:50Z

See also

2013-09-09T11:42:25Z

note cgal

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	* Triangulation in [[GRASS and VTK]]		* Triangulation in [[GRASS and VTK]]
	* [http://www.geuz.org/gmsh/ Gmsh] - A three-dimensional finite element mesh generator (GPL>=2, available as a standard Debian/Ubuntu package)		* [http://www.geuz.org/gmsh/ Gmsh] - A three-dimensional finite element mesh generator (GPL>=2, available as a standard Debian/Ubuntu package)
			* [http://www.cgal.org CGAL] - C++ library of efficient and reliable geometric algorithms

	[[Category:FAQ]]		[[Category:FAQ]]
	[[Category:HowTo]]		[[Category:HowTo]]

2013-09-09T11:41:03Z

← Older revision		Revision as of 11:41, 9 September 2013
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	==== Point network ====		==== Point network ====

	* Import x,y,z nodes with {{cmd\|v.in.ascii}}~~, as above and convert~~ to raster with {{cmd\|v.to.rast}}, ''or'' import/convert points with {{cmd\|r.in.xyz}}, then		* Import x,y,z nodes with {{cmd\|v.in.ascii}}
	~~: Use~~ the {{AddonCmd\|r.surf.nnbathy}} module with the "'''''<tt>l</tt>'''''" algorithm. See the [[Contour lines to DEM]] wiki page for details.		* Convert to raster with {{cmd\|v.to.rast}}, ''or'' import/convert points with {{cmd\|r.in.xyz}}, then use the {{AddonCmd\|r.surf.nnbathy}} module with the "'''''<tt>l</tt>'''''" algorithm. See the [[Contour lines to DEM]] wiki page for details.

	''or''		''or''

	* ~~Import x,y,z nodes with~~ {{~~cmd~~\|v.~~in.ascii~~}}~~, as above, then~~		* Use {{addonCmd\|v.delaunay3d\|version=7}} GRASS 7 AddOn by Martin Landa (2013) to create a 3D TIN using [http://www.cgal.org CGAL] library.
	: Use the new version of {{cmd\|v.delaunay}} by Martin Pavlovsky (2008) to create a triangle network and transform triangle areas to 3D '''faces'''. (''TODO: improve and expand this entry!'')		''or''

			* Use the new version of {{cmd\|v.delaunay}} by Martin Pavlovsky (2008) to create a triangle network and transform triangle areas to 3D '''faces'''. (''TODO: improve and expand this entry!'')

	==== ParaView ====		==== ParaView ====

2013-09-07T00:28:32Z

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	* {{addonCmd\|v.trimesh}} creates a triangular mesh from a vector map using areal constraints for refinement. It uses Jonathan Shewchuk's Triangle library.		* {{addonCmd\|v.trimesh}} creates a triangular mesh from a vector map using areal constraints for refinement. It uses Jonathan Shewchuk's Triangle library.
	* Triangulation in [[GRASS and VTK]]		* Triangulation in [[GRASS and VTK]]
			* [http://www.geuz.org/gmsh/ Gmsh] - A three-dimensional finite element mesh generator (GPL>=2, available as a standard Debian/Ubuntu package)


	[[Category:FAQ]]		[[Category:FAQ]]
	[[Category:HowTo]]		[[Category:HowTo]]

2013-08-07T14:07:54Z

2012-10-19T19:35:06Z

See also

2012-10-16T21:09:45Z

See also

2012-04-21T16:58:25Z

How to create a 3D TIN: <v.triangle> added

← Older revision		Revision as of 16:58, 21 April 2012
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	good luck!		good luck!


			==== TIN with "breaklines" ====

			[http://grass.osgeo.org/wiki/TIN_with_breaklines This] wiki-page explain how to construct TIN with "breaklines" in GRASS with the module <v.triangle>, which use <Triangle> utility.

	== See also ==		== See also ==

2012-02-23T13:32:04Z

ParaView

← Older revision		Revision as of 13:32, 23 February 2012
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	# Export your 3d points as a VTK file;		# Export your 3d points as a VTK file;
	# In Paraview (see also [[GRASS and Paraview]]), open the vtk file, click on Apply, then go to Filters-Alphabetical-Delaunay 2D (need to click apply again). click on the name of the just-created mesh and go to file-save data. Save it as a PLY file.		# In Paraview (see also [[GRASS and Paraview]]), open the vtk file, click on Apply, then go to Filters-Alphabetical-Delaunay 2D (need to click apply again). click on the name of the just-created mesh and go to file-save data. Save it as a PLY file.
	# Open the PLY in MEshLab and save as a DXF. If you open the dxf in a text editor, you will see the lovely 3DFACE. :)		# Open the PLY in MEshLab and save as a DXF. If you open the dxf in a text editor, you will see the lovely 3DFACE. :) Note: For GRASS 7 there is a v.in.ply addon

	If imported it back into GRASS, it will be imported as FACES.		If imported it back into GRASS, it will be imported as FACES.

2011-01-17T14:38:04Z

See also

← Older revision		Revision as of 14:38, 17 January 2011
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	* [http://www.bowdoin.edu/~ltoma/research.html r.refine - simplifying a grid terrain into a TIN] (triangular irregular network)		* [http://www.bowdoin.edu/~ltoma/research.html r.refine - simplifying a grid terrain into a TIN] (triangular irregular network)
	* ~~[[GRASS_AddOns#v.trimesh~~\|v.trimesh]] creates a triangular mesh from a vector map using areal constraints for refinement. It uses Jonathan Shewchuk's Triangle library.		* {{addonCmd\|v.trimesh}} creates a triangular mesh from a vector map using areal constraints for refinement. It uses Jonathan Shewchuk's Triangle library.
	* Triangulation in [[GRASS and VTK]]		* Triangulation in [[GRASS and VTK]]

	[[Category:FAQ]]		[[Category:FAQ]]