Help with 3D - Revision history

Neteler: /* Tips */ gmane is dead, use official link

2022-04-21T09:47:57Z

Tips: gmane is dead, use official link

← Older revision		Revision as of 09:47, 21 April 2022
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	==== Tips ====		==== Tips ====

	* From the mailing list: [~~http://thread.gmane.org/gmane.comp.gis.grass.user/12869/focus=12873 Raster 3D from DEMs (drillhole data)]~~		* From the mailing list: [https://lists.osgeo.org/pipermail/grass-user/2006-April/033602.html Raster 3D from DEMs (drillhole data)]
	~~<!-- http~~://lists.osgeo.org/pipermail/grass-user/2006-April/033602.html ~~-->~~

	==== Examples ====		==== Examples ====

Neteler: remove hardcoded version specific urls, use latest version

2018-12-04T10:21:23Z

remove hardcoded version specific urls, use latest version

← Older revision		Revision as of 10:21, 4 December 2018
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	The third dimension need not be limited to "z" elevation! It can just as well represent the time dimension in a time series of 2.5D raster surfaces. It is possible to make a '''4D''' visualization using the [[NVIZ]] software's animation panels and movie making facility.		The third dimension need not be limited to "z" elevation! It can just as well represent the time dimension in a time series of 2.5D raster surfaces. It is possible to make a '''4D''' visualization using the [[NVIZ]] software's animation panels and movie making facility.

	You can construct a 3D raster from a series of 2D slices ({{cmd\|r.to.rast3}}), interpolated from 3D vector points ({{cmd\|v.vol.rst}}), or from a text file ({{cmd\|r3.in.ascii}} and {{cmd\|r3.in.xyz~~\|version=70~~}}). You can import from [http://vis5d.sourceforge.net/ V5D] format with {{cmd\|r3.in.v5d}} and export to {{wikipedia\|VTK}} format with {{cmd\|r3.out.vtk}} (for visualization software like [[Paraview]] or {{wikipedia\|VisIt}}).		You can construct a 3D raster from a series of 2D slices ({{cmd\|r.to.rast3}}), interpolated from 3D vector points ({{cmd\|v.vol.rst}}), or from a text file ({{cmd\|r3.in.ascii}} and {{cmd\|r3.in.xyz}}). You can import from [http://vis5d.sourceforge.net/ V5D] format with {{cmd\|r3.in.v5d}} and export to {{wikipedia\|VTK}} format with {{cmd\|r3.out.vtk}} (for visualization software like [[Paraview]] or {{wikipedia\|VisIt}}).

	[[NVIZ]] supports visualizing 3D raster maps with cutting planes and isosurfaces.		[[NVIZ]] supports visualizing 3D raster maps with cutting planes and isosurfaces.
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	** ''volume'': An enclosed 3D space. The 3D equivalent to GRASS's ''area'' vector feature, meaning an alias to a "face(s)+kernel" set. <!-- HB: this is just a wild guess, I'm really not sure --> (''some infrastructure and place-holders exist, but not much in the way of practical applications has been coded yet'')		** ''volume'': An enclosed 3D space. The 3D equivalent to GRASS's ''area'' vector feature, meaning an alias to a "face(s)+kernel" set. <!-- HB: this is just a wild guess, I'm really not sure --> (''some infrastructure and place-holders exist, but not much in the way of practical applications has been coded yet'')

	* The {{cmd\|vectorascii\|desc=GRASS ASCII format specification~~\|version=70~~}}		* The {{cmd\|vectorascii\|desc=GRASS ASCII format specification}}

	* The ''v.in.ascii'' '''-z''' flag must be used to create a 3D file		* The ''v.in.ascii'' '''-z''' flag must be used to create a 3D file
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	==== Pyramid example ====		==== Pyramid example ====

	The following is an example of 3D vector surfaces in {{cmd\|vectorascii\|desc=GRASS ASCII vector format~~\|version=70~~}}. Can be loaded with {{cmd\|v.in.ascii}}.		The following is an example of 3D vector surfaces in {{cmd\|vectorascii\|desc=GRASS ASCII vector format}}. Can be loaded with {{cmd\|v.in.ascii}}.

	# 3D Pyramid in GRASS: (kernel type still mostly unused in GRASS 6)		# 3D Pyramid in GRASS: (kernel type still mostly unused in GRASS 6)

⚠️Amuriy: /* Vector 3D polygons */ Assimp library for 3D conversions

2015-09-06T19:05:26Z

Vector 3D polygons: Assimp library for 3D conversions

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 ==== Getting data and data conversion ====
-There are many free 3D mesh files available for research purposes from [http://www-rocq1.inria.fr/gamma/download/download.php INRIA.fr's GAMMA project]. These can be converted from e.g. 3D Studio (.3ds) format into DXF files with a converter program like [http://ftp.carnet.hr/pub/misc/VRML/utilities/converters/ wcvt2pov.exe] (runs well in Linux under wine). Then use v.in.dxf.
+There are many free 3D mesh files available for research purposes from [http://www-rocq1.inria.fr/gamma/download/download.php INRIA.fr's GAMMA project]. These can be converted from e.g. 3D Studio (.3ds) format into DXF files with a converter program like [http://ftp.carnet.hr/pub/misc/VRML/utilities/converters/wcvt2pov.exe] (runs well in Linux under wine). Then use v.in.dxf.
 Also [http://www.blender.org/ Blender] does a nice job for exporting to 3D DXF.
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 * save: AutoCAD DXF (*.dxf), 3D Studio (*.asc), Neutral File Format (*.nff), Povray V2.2 (*.pov), Povray V2.2 Include (*.inc), RAW (*.raw), TPOLY (*.tpo), True Space (*.cob), VRML V1.0 (*.wrl), Wavefront (*.obj), World Toolkit (*.nff)
 ==== Extrude 2D polygons to 3D ====

Neteler: + Extrude 2D polygons to 3D

2015-05-04T14:33:36Z

+ Extrude 2D polygons to 3D

← Older revision		Revision as of 14:33, 4 May 2015
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	* save: AutoCAD DXF (.dxf), 3D Studio (.asc), Neutral File Format (.nff), Povray V2.2 (.pov), Povray V2.2 Include (.inc), RAW (.raw), TPOLY (.tpo), True Space (.cob), VRML V1.0 (.wrl), Wavefront (.obj), World Toolkit (*.nff)		* save: AutoCAD DXF (.dxf), 3D Studio (.asc), Neutral File Format (.nff), Povray V2.2 (.pov), Povray V2.2 Include (.inc), RAW (.raw), TPOLY (.tpo), True Space (.cob), VRML V1.0 (.wrl), Wavefront (.obj), World Toolkit (*.nff)

			==== Extrude 2D polygons to 3D ====

			* see [[Extrude 2D polygons to 3D]]

	==== Screenshots ====		==== Screenshots ====

Neteler: fix Helena's URLs

2014-08-15T12:21:18Z

fix Helena's URLs

← Older revision		Revision as of 12:21, 15 August 2014
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	== See also ==		== See also ==
	* [http://~~skagit.meas~~.ncsu.edu/~~~helena~~/gmslab/viz/ches.html] Multidimensional interpolation and visualization (Mitasova et al., experimental version from USA CERL 1993-95)		* [http://www4.ncsu.edu/~hmitaso/gmslab/viz/ches.html] Multidimensional interpolation and visualization (Mitasova et al., experimental version from USA CERL 1993-95)
	* [http://~~skagit.meas~~.ncsu.edu/~~~helena~~/gmslab/viz/vol1.html] Interpolation and visualization from 3D and 4D scattered data using GRASS GIS (Mitasova et al., experimental version from USA CERL 1993-95)		* [http://www4.ncsu.edu/~hmitaso/gmslab/viz/vol1.html] Interpolation and visualization from 3D and 4D scattered data using GRASS GIS (Mitasova et al., experimental version from USA CERL 1993-95)
	* Grid3D library was developed by CERL and [http://~~skagit.meas~~.ncsu.edu/~~~helena~~/gmslab/ GMSL/University of Illinois]		* Grid3D library was developed by CERL and [http://www4.ncsu.edu/~hmitaso/gmslab GMSL/University of Illinois]

	[[Category: Documentation]]		[[Category: Documentation]]

Neteler: /* Vector 3D lines */

2014-08-15T12:12:50Z

Vector 3D lines

← Older revision		Revision as of 12:12, 15 August 2014
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	The GRASS vector engine is fully 3D aware, so 3D lines such as highways which cross at a bridge, but do not touch, can be modelled.		The GRASS vector engine is fully 3D aware, so 3D lines such as highways which cross at a bridge, but do not touch, can be modelled.
			* The {{cmd\|v.in.dxf}} or ''v.in.dwg'' modules can import 3D vector surfaces. DXF files are usually imported without georeference. To move into the geo-space of the rest of your data they must be projected with {{cmd\|v.proj}} or translated with {{cmd\|v.transform}}.
	* 3D line objects can be displayed with [[NVIZ]]		* 3D line objects can be displayed with [[NVIZ]]
	:(place above a 2D raster isosurface)		:(place above a 2D raster isosurface)

Neteler: cosmetics

2014-08-15T12:11:56Z

cosmetics

← Older revision		Revision as of 12:11, 15 August 2014
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	* The ''v.in.ascii'' '''-z''' flag must be used to create a 3D file		* The ''v.in.ascii'' '''-z''' flag must be used to create a 3D file

	* The {{cmd\|v.in.dxf}} or ''v.in.dwg'' modules can import 3D vector surfaces. DXF files are usually imported without georeference. To move into the geo-space of the rest of your data they must be projected with ''v.proj'' or translated with ''v.transform''. If working with them alone, it is recommended to use a simple XY location.		* The {{cmd\|v.in.dxf}} or ''v.in.dwg'' modules can import 3D vector surfaces. DXF files are usually imported without georeference. To move into the geo-space of the rest of your data they must be projected with {{cmd\|v.proj}} or translated with {{cmd\|v.transform}}. <strike>If working with them alone, it is recommended to use a simple XY location.</strike>

	* Visualization with NVIZ: must be placed on a raster surface or constant surface. It may be useful to set the transparency attribute of the raster surface to something unobtrusive.		* Visualization with NVIZ: vector data must be placed on a raster surface or constant surface. It may be useful to set the transparency attribute of the raster surface to something unobtrusive.

	==== Getting data and data conversion ====		==== Getting data and data conversion ====

Neteler: /* Visualization Tools */

2014-01-06T20:11:20Z

Visualization Tools

← Older revision		Revision as of 20:11, 6 January 2014
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	* See the [[Stereo anaglyphs]] and [[Stereoscopic analysis]] wiki pages, and the {{AddonCmd\|d.anaglyph}} addon module.		* See the [[Stereo anaglyphs]] and [[Stereoscopic analysis]] wiki pages, and the {{AddonCmd\|d.anaglyph}} addon module.

	== Visualization Tools ==		== Visualization Tools and export ==

	* [[NVIZ]]: GRASS's own ''n''-dimensional visualization suite		* [[NVIZ]]: GRASS's own ''n''-dimensional visualization suite
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	* [[wxNviz]]: wxGUI 3D view mode extension		* [[wxNviz]]: wxGUI 3D view mode extension

	* output to VTK & Paraview ({{cmd\|r.out.vtk}}, {{cmd\|r3.out.vtk}}, {{cmd\|v.out.vtk}})		* voxel output to VTK & Paraview ({{cmd\|r.out.vtk}}, {{cmd\|r3.out.vtk}}, {{cmd\|v.out.vtk}})
	** [[GRASS and Paraview]]		** [[GRASS and Paraview]]
	** [http://www-pool.math.tu-berlin.de/~soeren/grass/modules/screenshots/ Screenshots] (seek Para* there)		** [http://www-pool.math.tu-berlin.de/~soeren/grass/modules/screenshots/ Screenshots] (seek Para* there)

⚠️HamishBowman: /* Visualization Tools */

2013-06-05T06:02:27Z

Visualization Tools

← Older revision		Revision as of 06:02, 5 June 2013
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	[[Image:pyramid_3d.png\|thumb\|center\|480px\|Pyramid generated by {{cmd\|m.nviz.image}}]]		[[Image:pyramid_3d.png\|thumb\|center\|480px\|Pyramid generated by {{cmd\|m.nviz.image}}]]

			== Stereograms and Anaglyphs ==

			* See the [[Stereo anaglyphs]] and [[Stereoscopic analysis]] wiki pages, and the {{AddonCmd\|d.anaglyph}} addon module.

	== Visualization Tools ==		== Visualization Tools ==

⚠️HamishBowman: /* Pyramid example */

2013-06-05T05:57:25Z

Pyramid example

← Older revision		Revision as of 05:57, 5 June 2013
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	The following is an example of 3D vector surfaces in {{cmd\|vectorascii\|desc=GRASS ASCII vector format\|version=70}}. Can be loaded with {{cmd\|v.in.ascii}}.		The following is an example of 3D vector surfaces in {{cmd\|vectorascii\|desc=GRASS ASCII vector format\|version=70}}. Can be loaded with {{cmd\|v.in.ascii}}.

	# 3D Pyramid in GRASS: (kernel type still unused in GRASS 6)		# 3D Pyramid in GRASS: (kernel type still mostly unused in GRASS 6)
			#
	# v.in.ascii in=pyramid.vasc out=pyramid_3d format=standard -nz		# v.in.ascii in=pyramid.vasc out=pyramid_3d format=standard -nz
	# g.region n=150 s=-50 w=-50 e=150 res=10		# g.region n=150 s=-50 w=-50 e=150 res=10
	# r.mapcalc "one = 1"		# r.mapcalc "one = 1"
			#
	# GRASS 6		# GRASS 6
	# nviz elev=one vect=pyramid_3d		# nviz elev=one vect=pyramid_3d
			#
	# or in GRASS 7		# or in GRASS 7
			# ({{Cmd\|m.nviz.image}} available in both, Command line {{Cmd\|nviz}} only in G6)
			#
	# m.nviz.image -a elevation_map=one@3Dmapset mode=fine resolution_fine=6 \		# m.nviz.image -a elevation_map=one@3Dmapset mode=fine resolution_fine=6 \
	# color_map=one@3Dmapset position=0.26,0.82 height=800 perspective=9 \		# color_map=one@3Dmapset position=0.26,0.82 height=800 perspective=9 \