Editing NMG

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This yields the following object: (an MGED wireframe, from the az35,el25 view setting):
 
This yields the following object: (an MGED wireframe, from the az35,el25 view setting):
[[File:nmg-wiki-tutorial-box-mged-screenshot.png|none|1024px|The MGED wireframe of the box from az35,el25]]
+
[[File:nmg-wiki-tutorial-box-mged-screenshot.png|none|1024px|The MGED wireframe of the box from above]]
  
 
Another more complex example is to create a box with a hole through it.  Much of the command is the same as the one above for creating a plain box; the first thing to do is to add the necessary vertices to the <code>V</code> list.  For the lower face, <code>{ 0.25 0.25 0 }</code>, <code>{ 0.75 0.25 0 }</code>, <code>{ 0.75 0.75 0 }</code>, and <code>{ 0.25 0.75 0 }</code> are the necessary vertices; for the upper face, these are <code>{ 0.25 0.25 1 }</code>, <code>{ 0.25 0.75 1 }</code>, <code>{ 0.75 0.75 1 }</code>, <code>{ 0.75 0.25 1 }</code>.  Changing the first two face statements from above to <code>F { { 0 1 2 3 } { 8 9 10 11 } } F { { 4 5 6 7 } { 12 13 14 15 } }</code> makes the faces have the necessary cutouts.  Four faces must be added to form the sides of the hole through the box; these are <code>F { { 8 12 13 11 } }</code>, <code>F { { 11 13 14 10 } }</code>, <code>F { { 10 14 15 9 } }</code>, and <code>F { { 12 8 9 15 } }</code>.  The final command with all of this is:
 
Another more complex example is to create a box with a hole through it.  Much of the command is the same as the one above for creating a plain box; the first thing to do is to add the necessary vertices to the <code>V</code> list.  For the lower face, <code>{ 0.25 0.25 0 }</code>, <code>{ 0.75 0.25 0 }</code>, <code>{ 0.75 0.75 0 }</code>, and <code>{ 0.25 0.75 0 }</code> are the necessary vertices; for the upper face, these are <code>{ 0.25 0.25 1 }</code>, <code>{ 0.25 0.75 1 }</code>, <code>{ 0.75 0.75 1 }</code>, <code>{ 0.75 0.25 1 }</code>.  Changing the first two face statements from above to <code>F { { 0 1 2 3 } { 8 9 10 11 } } F { { 4 5 6 7 } { 12 13 14 15 } }</code> makes the faces have the necessary cutouts.  Four faces must be added to form the sides of the hole through the box; these are <code>F { { 8 12 13 11 } }</code>, <code>F { { 11 13 14 10 } }</code>, <code>F { { 10 14 15 9 } }</code>, and <code>F { { 12 8 9 15 } }</code>.  The final command with all of this is:
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mged> put box_with_hole_nmg nmg 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 } { 0.25 0.25 0 } { 0.75 0.25 0 } { 0.75 0.75 0 } { 0.25 0.75 0 } { 0.25 0.25 1 } { 0.25 0.75 1 } { 0.75 0.75 1 } { 0.75 0.25 1 } } F { { 0 1 2 3 } { 8 9 10 11 } } F { { 4 5 6 7 } { 12 13 14 15 } } F { { 0 1 6 5 } } F { { 1 2 7 6 } } F { { 2 3 4 7 } } F { { 0 5 4 3 } } F { { 8 12 13 11 } } F { { 11 13 14 10 } } F { { 10 14 15 9 } } F { { 9 15 12 8 } }
 
mged> put box_with_hole_nmg nmg 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 } { 0.25 0.25 0 } { 0.75 0.25 0 } { 0.75 0.75 0 } { 0.25 0.75 0 } { 0.25 0.25 1 } { 0.25 0.75 1 } { 0.75 0.75 1 } { 0.75 0.25 1 } } F { { 0 1 2 3 } { 8 9 10 11 } } F { { 4 5 6 7 } { 12 13 14 15 } } F { { 0 1 6 5 } } F { { 1 2 7 6 } } F { { 2 3 4 7 } } F { { 0 5 4 3 } } F { { 8 12 13 11 } } F { { 11 13 14 10 } } F { { 10 14 15 9 } } F { { 9 15 12 8 } }
 
</code>
 
</code>
 
This produces the following wireframe when drawn in MGED using the az35,el25 view setting:
 
[[File:nmg-wiki-tutorial-box-with-hole-mged-screenshot.png|none|1024px|The MGED wireframe of the box with a hole from az35,el25]]
 

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