Editing MGED CMD nmg

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{{DesignDocument}}
 
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=nmg ''design'' =
 
=nmg ''design'' =
 
__TOC__
 
__TOC__
  
 
==Syntax==
 
==Syntax==
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:nmg object subcommand [suffix]
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:nmg subcommand object [suffix]
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==Arguments==
 
  
 +
==Argument(s)==
 +
<!--
 
: '''object'''
 
: '''object'''
 
:: Name for the primitive that you want to operate on.
 
:: Name for the primitive that you want to operate on.
  
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: '''subcommand'''
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: '''S'''
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:: Command specified to alter an NMG object. Each has it's own set of arguments.
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:: Plot or output info for a specific 'surface'.
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: '''F'''
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:: Plot or output info for a specific 'face'.
  
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==Subcommands==
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: '''T'''
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:: Plot or output info for a specific 'trim'.
  
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: '''mm'''
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: '''E'''
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:: Creates a new NMG model structure and fills the appropriate fields. The result is an empty model.
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:: Plot or output info for a specific 'edge'.
  
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: '''cmface'''
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: '''SB'''
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:: Generates a manifold face in the first encountered shell of the NMG object. Vertices are listed as the ''suffix'' and define the winding-order of the face. Faces require at least three specified vertices, each specified by three coordinates. In addition to creating a face, the subcommand will join edges of the new face with dangling edges of other faces in the same shell. This makes it easier for the application to generate topologically correct, closed, manifold objects.
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:: Output 'bezier' info for a specific 'surface'.
  
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: '''kill V'''
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: '''TB'''
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:: Removes the vertexuse and vertex geometry of the selected vertex (via its coordinates). When specifying vertex to be removed, user generally will display vertex coordinates in object via the MGED command [http://brlcad.org/wiki/MGED_CMD_labelvert labelvert]. '''Note: vertex selection via their index number is not currently supported.'''
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:: Output 'bezier' info for a specific 'trim'.
  
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::For example: 
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: '''I'''
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::: '''mged&gt;''' labelvert myobj 
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:: Plot a specific 'iso-surface'.
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::: '''mged&gt;''' nmg myobj kill V 0.0 2.537 1.289
 
  
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: '''kill F'''
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: '''SN'''
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:: Removes the faceuse and face geometry of the selected face (via its index). When specifying the face to be removed, user generally will display face indices in object via the MGED command [http://brlcad.org/wiki/MGED_CMD_labelvert labelface].
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:: Plot a specific 'surface normal'.
  
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::For example: 
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: '''KN'''
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::: '''mged&gt;''' labelface myobj 
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:: Plot a specific 'surface's knots'.
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::: '''mged&gt;''' nmg myobj kill F 14
 
  
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: ''' move V ''' ''x_initial y_initial z_initial x_final y_final z_final''
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: '''F2d'''
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:: Moves an existing vertex specified by the coordinates ''x_initial y_initial z_initial'' to the position with coordinates ''x_final y_final z_final''.  
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:: Plot a specific 'face' in '2d-space'.
  
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::For example:
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: '''SBB'''
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::: '''mged&gt;''' nmg myobject move V 1.0 1.0 1.0 2.0 2.0 2.0
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:: Plot a specific 'surface's leafs' (surface tree).
  
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: ''' make V ''' ''vertex-list''
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: '''SBB2d'''
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:: Creates a new vertex and shell for all vertices, using the ''vertex-list''.  
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:: Plot a specific 'surface's leafs' in '2d-space'.
  
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::For example:
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: '''TD'''
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::: '''mged&gt;''' nmg myobject make V 0 0 0 0 1 0 1 1 0 1 0 0 1 0 1 0 0 1 0 1 1 1 1 1
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:: Plot a specific 'trim direction'.
  
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: ''' make F ''' ''face-list''
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: '''T2d'''
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:: Creates face(s) in first encountered region and shell. General usage is to first label vertices with their index number using [[MGED_CMD_labelvert#Proposed_Argument.28s.29 | labelvert -i]].
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:: Plot a specific 'trim' in '2d-space'.
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−
::For example: 
 
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::: '''mged&gt;''' labelvert -i myobject
 
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::: '''mged&gt;''' nmg myobject make F 4 5 6 7 F 0 1 6 5 F 1 2 7 6 F 2 3 4 7 F 0 5 4 3
 
  
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'''Note: index numbers may change after 'make F' command. Thus, execute labelvert witht the -i option before each use of 'make F'.'''
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: '''TBB'''
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:: Plot a specific 'trim's leafs' (curve tree).
  
 +
: '''TBB2d'''
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:: Plot a specific 'trim's leafs' in '2d-space'.
 +
 +
: '''SCV'''
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:: Plot a specific 'surface's CV'.
 +
 +
: '''index'''
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:: The index of the surface (face, edge, etc.) you want to plot or output info for. You can use a single number, 'number-number', or 'all'.
 +
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: '''object2'''
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:: The other object to intersect 'object'.
 +
 +
: '''i'''
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:: Intersect object's ith surface.
 +
 +
: '''j'''
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:: Intersect object2's jth surface.
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: '''PP'''
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:: Point-point intersections.
 +
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: '''PC'''
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:: Point-curve intersections.
 +
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: '''PS'''
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:: Point-surface intersections.
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: '''CC'''
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:: curve-curve intersections.
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 +
: '''CS'''
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:: curve-surface intersections.
 +
 +
: '''SS'''
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:: surface-surface intersections (default).
 +
 +
: '''brepname'''
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:: When convert a non-BREP object to BREP, the result BREP's name.
 +
 +
: '''comb'''
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:: The comb to be converted to non-evaluated BREP form.
 +
 +
: '''suffix'''
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:: The suffix in the generated BREPs' names.
 +
-->
 
==Return Value(s)==
 
==Return Value(s)==
 
: No Return Values for this command.
 
: No Return Values for this command.
 +
  
 
==Description==
 
==Description==
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==Example(s)==
 
==Example(s)==
 
<!--
 
<!--
 +
: '''mged&gt;''' brep obj.brep info F 0
 +
:: Output information for the 0th face of obj.brep.
 +
: '''mged&gt;''' brep obj.brep plot S 0-2
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:: Plot the 0th to 2nd surfaces of obj.brep.
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: '''mged&gt;''' brep sph1.brep intersect sph2.brep 0 0
 +
:: Intersect sph1.brep's 0th surface with sph2.brep's 0th surface. (When there's no intersection type specified, we compute SS intersections)
 
: '''mged&gt;''' brep obj.s obj.brep
 
: '''mged&gt;''' brep obj.s obj.brep
 
:: Convert implicit primitive obj.s to BREP form named obj.brep.
 
:: Convert implicit primitive obj.s to BREP form named obj.brep.
 
-->
 
-->
−
 
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: '''mged&gt;''' nmg cube mm
 
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:: Creates an empty NMG object.
 
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: '''mged&gt;''' nmg cube cmface 0 0 0 0 1 0 1 1 0 1 0 0
 
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:: Creates 1st face of a six-sided cube.
 
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: '''mged&gt;''' nmg cube cmface 1 0 1 0 0 1 0 1 1 1 1 1
 
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:: Creates 2nd face of a six-sided cube.
 
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: '''mged&gt;''' nmg cube cmface 0 0 0 0 1 0 0 1 1 0 0 1
 
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:: Creates 3rd face of a six-sided cube.
 
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: '''mged&gt;''' nmg cube cmface 0 1 0 1 1 0 1 1 1 0 1 1
 
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:: Creates 4th face of a six-sided cube.
 
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: '''mged&gt;''' nmg cube cmface 1 1 0 1 0 0 1 0 1 1 1 1 
 
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:: Creates 5th face of a six-sided cube.
 
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: '''mged&gt;''' nmg cube cmface 0 0 0 0 0 1 1 0 1 1 0 0
 
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:: Creates 6th face of a six-sided cube.
 
  
 
==See Also==
 
==See Also==
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: [http://brlcad.org/wiki/NMG_Editing NMG Editing] project idea page
 
 
: [http://brlcad.org/wiki/NMG put] for use with NMG objects
 
: [http://brlcad.org/wiki/NMG put] for use with NMG objects
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: [http://brlcad.org/wiki/MGED_CMD_brep brep] command
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: [http://brlcad.org/wiki/MGED_CMD_brep brep]
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: Wikipedia article on [https://en.wikipedia.org/wiki/Polygon_mesh polygon mesh]
 

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