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• Creating a part

  jlbrian7 • 05/22/2016 at 13:51 • 0 comments

  C:\Users\jeramy\Documents\BRLCAD 7.24.0\bin>dxf-g -dv "C:\\Users\\jeramy\\Documents\\BRL-CAD\\Grinder_Switch_Plate\\Grinder_Switch_Plate.dxf" "C:\\Users\\jeramy\\Documents\\BRL-CAD\\Grinder_Switch_Plate\\Grinder_Switch_Plate.g"

  mged> units in

  mged> draw sketch.1

  mged> in arb1.s arb8 0 0 0 2.69 0 0 2.69 1.303 0 0 1.303 0 0 0 0.118 2.69 0 0.118 2.69 1.303 0.118 0 1.303 0.118

  mged> in arb2.s arb8 0.9785 0.4030 0 1.7115 0.4030 0 1.7115 0.9 0 0.9785 0.9 0 0.9785 0.4030 0.118 1.7115 0.4030 0.118 1.7115 0.9 0.118 0.9785 0.9 0.118

  mged> in rcc1.s rcc 0.18 0.6515 0 0 0 0.118 0.1050

  mged> in rcc2.s rcc 2.51 0.6515 0 0 0 0.118 0.1050

  mged> r grinder_switch_plate.r u arb1.s - arb2.s - rcc1.s - rcc2.s

  mged> Z

  mged> draw grinder_switch_plate.r

  C:\Users\jeramy\Documents\BRLCAD 7.24.0\bin>g-stl -bi -o "C:\\Users\\jeramy\\Documents\\BRL-CAD\\Grinder_Switch_Plate\\Grinder_Switch_Plate(part).stl" "C:\\Users\\jeramy\\Documents\\BRL-CAD\\Grinder_Switch_Plate\\Grinder_Switch_Plate.g" grinder_switch_plate.r
  

  {arb1.s} - {arb2.s}
  {(arb1.s - arb2.s)} - {rcc1.s}
  {((arb1.s - arb2.s) - rcc1.s)} - {rcc2.s}
  168 triangles written

  Load stl into Slic3r, and set scale to 2540% to convert in to mm.

  ///////////////////////////////////////////////////////////////////////////////////////////////////////////////

  Alternatively:

  C:\Users\jeramy\Documents\BRLCAD 7.24.0\bin>dxf-g -dv "C:\\Users\\jeramy\\Documents\\BRL-CAD\\Grinder_Switch_Plate\\Grinder_Switch_Plate.dxf" "C:\\Users\\jeramy\\Documents\\BRL-CAD\\Grinder_Switch_Plate\\Grinder_Switch_Plate.g"

  mged> units in

  mged> in sketch.2 extrude 0 0 0 0 0 0.118 0.03937 0 0 0 0.03937 0 sketch.1
  

  **Here the 0.03937 is the value 1/25.4, which is the factor for in/mm, and the value .118 is what I came up with for the height in in (which is 3mm). I came up with this because it is appropriate for the part, and I could easily check it when scaling the drawing in the slicer, because it is looking for the drawing to be in mm units, however I took all of my part measurements in standard units.
  

  I don't understand why the A and B values have to be what they are, but it seems to be working.
  

  (V: 0 0 0)
  

  (H: 0 0 0.118)
  

  (A: 0.03937 0 0)
  

  (B: 0 0.03937 0)
  

  (http://brlcad.org/wiki/Extrude)
  

  C:\Users\jeramy\Documents\BRLCAD 7.24.0\bin>g-stl -bi -o "C:\\Users\\jeramy\\Documents\\BRL-CAD\\Grinder_Switch_Plate\\Grinder_Switch_Plate.stl" "C:\\Users\\jeramy\\Documents\\BRL-CAD\\Grinder_Switch_Plate\\Grinder_Switch_Plate.g" sketch.2

  Comparison of the outputs:

  C:\Users\jeramy\Documents\BRLCAD 7.24.0\bin>g-stl -bi -o "C:\\Users\\jeramy\\Documents\\BRL-CAD\\Grinder_Switch_Plate\\Grinder_Switch_Plate(extrude).stl" "C:\\Users\\jeramy\\Documents\\BRL-CAD\\Grinder_Switch_Plate\\Grinder_Switch_Plate.g"sketch.2
  296 triangles written

  
  
  C:\Users\jeramy\Documents\BRLCAD 7.24.0\bin>g-stl -bi -o "C:\\Users\\jeramy\\Documents\\BRL-CAD\\Grinder_Switch_Plate\\Grinder_Switch_Plate(part).stl" "C:\\Users\\jeramy\\Documents\\BRL-CAD\\Grinder_Switch_Plate\\Grinder_Switch_Plate.g" grinder_switch_plate.r
  {arb1.s} - {arb2.s}
  {(arb1.s - arb2.s)} - {rcc1.s}
  {((arb1.s - arb2.s) - rcc1.s)} - {rcc2.s}
  168 triangles written

  Here you can see the difference in file sizes:

  Scaled side by side comparison in slic3r:

  Green is highlighted part.

  I used printrun to make the part. https://github.com/kliment/Printrun
  

  *** Don't create nonsensical regions, be mindful of the order that regions are created in, i.e.) don't union solids and then subtract holes. create appropriate combinations with holes subtracted, then create region of combinations, as necessary. Part will display correctly in mged, but will not properly create .stl.

  
  https://sourceforge.net/p/brlcad/mailman/message/34711181/

  TODO: Show examples.
  

• Converting Geometry

  jlbrian7 • 05/20/2016 at 22:07 • 0 comments

  Converting .dxf to .g

  This file was saved in DraftSight as R2013 ASCII Drawing (*.dxf)

  C:\Users\jeramy\Documents\BRLCAD 7.24.0\bin>dxf-g -dv "C:\\Users\\jeramy\\Documents\\BRL-CAD\\Grinder_Switch_Plate\\Grinder_Switch_Plate.dxf" "C:\\Users\\jeramy\\Documents\\BRL-CAD\\Grinder_Switch_Plate\\Grinder_Switch_Plate.g"

  Output (what I was able to capture):
  

  12600: ACDSRECORD
  12601: 95
  12602: 0
  12603: 90
  12604: 3
  12605: 2
  12606: AcDbDs::Legacy
  12607: 280
  12608: 1
  12609: 291
  12610: 1
  12611: 101
  12612: ACDSRECORD
  12613: 1
  12614: AcDbDs::ID
  12615: 90
  12616: 4
  12617: 2
  12618: AcDs:Indexable
  12619: 280
  12620: 1
  12621: 291
  12622: 1
  12623: 101
  12624: ACDSRECORD
  12625: 1
  12626: AcDbDs::ID
  12627: 90
  12628: 5
  12629: 2
  12630: AcDbDs::HandleAttribute
  12631: 280
  12632: 7
  12633: 282
  12634: 1
  12635: 0
  12636: ACDSSCHEMA
  12637: 90
  12638: 1
  12639: 1
  12640: AcDb3DSolid_ASM_Data
  12641: 2
  12642: AcDbDs::ID
  12643: 280
  12644: 10
  12645: 91
  12646: 8
  12647: 2
  12648: ASM_Data
  12649: 280
  12650: 15
  12651: 91
  12652: 0
  12653: 101
  12654: ACDSRECORD
  12655: 95
  12656: 1
  12657: 90
  12658: 2
  12659: 2
  12660: AcDbDs::TreatedAsObjectData
  12661: 280
  12662: 1
  12663: 291
  12664: 1
  12665: 101
  12666: ACDSRECORD
  12667: 95
  12668: 1
  12669: 90
  12670: 3
  12671: 2
  12672: AcDbDs::Legacy
  12673: 280
  12674: 1
  12675: 291
  12676: 1
  12677: 101
  12678: ACDSRECORD
  12679: 1
  12680: AcDbDs::ID
  12681: 90
  12682: 4
  12683: 2
  12684: AcDs:Indexable
  12685: 280
  12686: 1
  12687: 291
  12688: 1
  12689: 101
  12690: ACDSRECORD
  12691: 1
  12692: AcDbDs::ID
  12693: 90
  12694: 5
  12695: 2
  12696: AcDbDs::HandleAttribute
  12697: 280
  12698: 7
  12699: 282
  12700: 1
  12701: 0
  12702: ACDSSCHEMA
  12703: 90
  12704: 2
  12705: 1
  12706: AcDbDs::TreatedAsObjectDataSchema
  12707: 2
  12708: AcDbDs::TreatedAsObjectData
  12709: 280
  12710: 1
  12711: 91
  12712: 0
  12713: 0
  12714: ACDSSCHEMA
  12715: 90
  12716: 3
  12717: 1
  12718: AcDbDs::LegacySchema
  12719: 2
  12720: AcDbDs::Legacy
  12721: 280
  12722: 1
  12723: 91
  12724: 0
  12725: 0
  12726: ACDSSCHEMA
  12727: 90
  12728: 4
  12729: 1
  12730: AcDbDs::IndexedPropertySchema
  12731: 2
  12732: AcDs:Indexable
  12733: 280
  12734: 1
  12735: 91
  12736: 0
  12737: 0
  12738: ACDSSCHEMA
  12739: 90
  12740: 5
  12741: 1
  12742: AcDbDs::HandleAttributeSchema
  12743: 2
  12744: AcDbDs::HandleAttribute
  12745: 280
  12746: 7
  12747: 91
  12748: 1
  12749: 284
  12750: 1
  12751: 0
  12752: ACDSRECORD
  12753: 90
  12754: 0
  12755: 2
  12756: AcDbDs::ID
  12757: 280
  12758: 10
  12759: 320
  12760: 22
  12761: 2
  12762: Thumbnail_Data
  12763: 280
  12764: 15
  12765: 94
  12766: 1287
  12767: 310
  12768: 89504E470D0A1A0A0000000D49484452000001000000008808030000003F38C55500000
  00504C544595989D000000FFFFFF000000000000000000000000000000000000000000000000000
  330000660000990000CC0000FF0033000033330033660033990033CC0033FF00660000663300666
  0066990066CC0066FF0099
  12769: 310
  12770: 000099330099660099990099CC0099FF00CC0000CC3300CC6600CC9900CCCC00CCFF00F
  0000FF3300FF6600FF9900FFCC00FFFF3300003300333300663300993300CC3300FF33330033333
  3333663333993333CC3333FF3366003366333366663366993366CC3366FF3399003399333399663
  99993399CC3399FF33CC00
  12771: 310
  12772: 33CC3333CC6633CC9933CCCC33CCFF33FF0033FF3333FF6633FF9933FFCC33FFFF66000
  6600336600666600996600CC6600FF6633006633336633666633996633CC6633FF6666006666336
  66666666996666CC6666FF6699006699336699666699996699CC6699FF66CC0066CC3366CC6666C
  9966CCCC66CCFF66FF0066
  12773: 310
  12774: FF3366FF6666FF9966FFCC66FFFF9900009900339900669900999900CC9900FF9933009
  33339933669933999933CC9933FF9966009966339966669966999966CC9966FF999900999933999
  669999999999CC9999FF99CC0099CC3399CC6699CC9999CCCC99CCFF99FF0099FF3399FF6699FF9
  99FFCC99FFFFCC0000CC00
  12775: 310
  12776: 33CC0066CC0099CC00CCCC00FFCC3300CC3333CC3366CC3399CC33CCCC33FFCC6600CC6
  33CC6666CC6699CC66CCCC66FFCC9900CC9933CC9966CC9999CC99CCCC99FFCCCC00CCCC33CCCC6
  CCCC99CCCCCCCCCCFFCCFF00CCFF33CCFF66CCFF99CCFFCCCCFFFFFF0000FF0033FF0066FF0099F
  00CCFF00FFFF3300FF3333
  12777: 310
  12778: FF3366FF3399FF33CCFF33FFFF6600FF6633FF6666FF6699FF66CCFF66FFFF9900FF993
  FF9966FF9999FF99CCFF99FFFFCC00FFCC33FFCC66FFCC99FFCCCCFFCCFFFFFF00FFFF33FFFF66F
  FF99FFFFCCFFFFFF0000000D0D0D1A1A1A2828283535354343435050505D5D5D6B6B6B787878868
  86939393A1A1A1AEAEAEBB
  12779: 310
  12780: BBBBC9C9C9D6D6D6E4E4E4F1F1F1FFFFFF0000000000000000000000000000000000000
  0000000000000000000000533D0435000000097048597300000EC400000EC401952B0E1B000001A...

  Read more »

• LOG ENTRY: Derived from 2D

  jlbrian7 • 05/20/2016 at 16:28 • 0 comments

  ebm

  1) Import this image into gimp

  2) create new image, same size, with black background

  3) copy paste skull onto black background, anchor layer

  4) set image mode to indexed, black and white

  5) export as .data file (Standard (R, G, B); B, G, R, X (BMP style))

  (save exported file in the same folder as the working .g database)
  

  6) mged> in ebm1.s ebm had_logo.data 870 794 5
  

  7) mged> l ebm1.s

  Output:
  

  ebm1.s: extruded bitmap (EBM)
  file="had_logo.data" w=870 n=794 depth=5
  mat=1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1

• LOG ENTRY: Other Solids

  jlbrian7 • 05/20/2016 at 16:00 • 0 comments

  Other Solids
  

  Ummmm..... There was no point in creating multipane drawings if you are going to show the same view in all of them. (TODO: FIX THESE VIEWS)
  

  tor

  eto

  part

  nmg (nmg editing link)

  come back to this one ...
  

  pipe

  ars

  metaball

  nurb (?)

  This is listed in the primitives section, but there is no command for it.
  

  spline (?)

  This is listed in the primitives section, but there is no command for it.
  

  vol

  come back to this one ...
  

  bot

  poly

  depreciated, use bot instead
  

  
  

• LOG ENTRY: Cones and Cylinders

  jlbrian7 • 05/20/2016 at 01:25 • 0 comments

  Cones and Cylinders

  tgc

  rcc

  rec

  rhc

  rpc

  tec

  trc

• LOG ENTRY: Ellipsoids

  jlbrian7 • 05/19/2016 at 22:19 • 0 comments

  Ellipsoids

  Command:

  make ell1.s ell
  

  in ell2.s ell
  

  in ell3.s ell 0 0 0 0 -1 0 1 0 0 0 0 1

  Primitive: ell
  

  Command:

  make sph1.s sph
  

  in sph2.s sph
  

  * when you type " l sph1.s"

  An output similar to the following is generated. The geometry is listed as an ellipsoid because a sphere is a special form of ellipsoid.

  
  sph1.s: ellipsoid (ELL)
  V (132.304, -34.6358, -292.896)
  A (565.678, 0, 0) mag=565.678
  B (0, 565.678, 0) mag=565.678
  C (0, 0, 565.678) mag=565.678
  A direction cosines=(0, 90, 90)
  A rotation angle=0, fallback angle=0
  B direction cosines=(90, 0, 90)
  B rotation angle=90, fallback angle=0
  C direction cosines=(90, 90, 0)
  C rotation angle=0, fallback angle=90

  Command:

  in ell4.s ellg
  

  Command:

  make ell5.s ell1
  

  in ell6.s ell1
  

  Command:

  make ehy1.s ehy
  

  in ehy2.s ehy
  

  
  

  Command:

  make epa1.s epa
  

  in epa2.s epa
  

  
  

  
  

• LOG ENTRY: Arbitrary convex polyhedra

  jlbrian7 • 05/19/2016 at 22:02 • 0 comments

  Arbitrary convex polyhedra

  Command:
  

  arb arb1.s 0 0
  

  make arb2.s arb8
  

  in arb8.s arb8 (this command will prompt you to enter the {X, Y, Z} for the 8 points)

  in arb9.s arb8 0 0 0 20 0 0 20 20 0 0 20 0 0 0 2 20 0 2 20 20 2 0 20 2

  *this is the same as if the following was entered on the previous command

  Enter X, Y, Z for point 1: 0 0 0
  Enter X, Y, Z for point 2: 20 0 0
  Enter X, Y, Z for point 3: 20 20 0
  Enter X, Y, Z for point 4: 0 20 0
  Enter X, Y, Z for point 5: 0 0 2
  Enter X, Y, Z for point 6: 20 0 2
  Enter X, Y, Z for point 7: 20 20 2
  Enter X, Y, Z for point 8: 0 20 2

  Command:

  make arb3.s arb7
  

  in arb10.s arb7
  

  Command:

  make arb4.s arb6
  

  in arb11.s arb6
  

  Command:

  make arb5.s arb5
  

  in arb12.s arb5
  

  Command:

  make arb6.s arb4
  

  in arb13.s arb4
  

  Command:

  make arb7.s arbn
  

  in arb14.s arbn
  

  
  
  

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