Visit:   RogCAD Girder and Panel Building Set  home page
  RogCAD is freeware.  Click here.
 R  o  g  C  A  D      3  D      m  o  d  e  l  i  n  g
Click on a New York City
landmark for full image


           Hull wireframe modeled in RogCAD                                                       Hull surface modeled in RogCAD
RogCAD, for DOS and Windows operating systems

3D CAD modeling

Keyboard data entry CAD software from yesteryear, for technically oriented users. For hobby or productivity.

This software, typical of simplistic 80's CADware, does not provide photo-realism or fast modeling routines, but it does provide complete control over the output, being keyboard entry based. It's especially useful for combining wireframe modeling with surface modeling in a customized manner. Also, being keyboard entry based, it allows for easy editing of designs. One simply edits a text file containing the data elements, using Notepad or any text editor. RogCAD is a general use CAD program. You can request a copy of it or hire me to model your project for you.

Recent project:
BVI yacht 02/26/06
Recent project: BVI yacht 04/03/06
Recent project: BVI yacht animation
Recent project: Sunrise - sunset modeling
Recent project: Virtual Girder and Panel (1960 toy)
(Also visit the Girder and Panel home page)
You can take a look at some output from a recent project by clicking here. It's a proposed awning/ possible screenporch for a client's cabin.

Here's another recent project for a house addition - New workshop/office.    


If you would just like a copy of RogCAD, drop me a line. (But first take a look at the How To document, which is a brief introduction to using RogCAD, then the instruction document for the DOS version.)

RogCAD is available in 640 X 480 for DOS (15 colors per palette), and 1024 X 768, 1280 X 960, 1400 X 1050, and 1600 X 1200 for Windows (255 colors per palette).

Here's the Windows 1024 x 768 interface:

gear       cineplex
Click image for better detail

Projects in RogCAD are built up mostly through the use of cubic primitives. The user defines a cubic shape by specifying two diagonally opposite vertices.

RogCAD automatically supplies the remaining six vertices as well as the connecting lines and planes.

These cubic elements can be skewed, resized, rotated, translated and repeated along straight or curved lines.

Thus generated are things like rows of mitered boards, windows, or rows of buildings.

Points, lines and planes can also be defined independently, and are integrated with the cubic primitive data structures, as are curved surfaces.

Complex curved surfaces are modeled by stretching basic circular shapes in a variety of directions. The boat shown here required about two hours of data entry.


 More about RogCAD features: 

   *  It's strictly keyboard entry, therefore inherently
      precise.  Design elements fit together seamlessly.

   *  Data for a project is displayed collectively in a
      text file, allowing data entry and editing in any order.  

   *  Can combine wireframe and surface modeling in any manner.

   *  Provides automatic shading for light source direction.

   *  Provides customizable grids and multicolor wireframe lines.

   *  Provides unlimited range of perspective points and 
      focal points, and allows you to specify these values 
      using 3D coordinates.

   *  Can overlay multiple projects.

   *  Provides excellent control of the color palette.


   *  Not compatible with any other CAD format.

   *  Slow learning curve.  You need to have an
      appreciation for the old fashioned "nuts and bolts"
      approach used in this software.

   *  Contains no libraries of predrawn elements, 
      therefore not best suited for detailed 
      drawings of standard designs.  Best suited 
      for accurately conveying the overall look of 
      an object, especially the unconventional.

   *  Surface modeling of curved surfaces is not
      fully automatic and requires alot from the user.

   *  Surface modeling of complex objects needs to
      be done in multiple operations.

 I originally wrote RogCAD to run on my old IBM XT
 with the text-only monitor.  The data points had to 
 be plotted on paper by hand and then connected with 
 a straightedge.

 From 1993 to 2001, I developed it into its current form. 

 RogCAD is freeware.  - Roger Luebeck

 RogCAD code

 end rogcad                   site map

  Special Relativity explained in absolute terms -

  eliminates the twin paradox, shows Einstein's clock sychronization
  diagrammed in absolute terms, and ends all confusion regarding
  relative frames of reference.  Completely compatible with, and in
  fact subsumes, Einstein's relativity.  Not Lorentzian relativity.
  Reveals what is transpiring behind the scenes of Einstein's


  Relativity in Absolute Terms.
  My most comprehensive online document.  A concise overview
  of why special relativity must be diagrammed in absolute terms.

  Twin Paradox Animation.
  Expanded text, and animation of the twin paradox.  (Embedded youtube animation.)

  Twin Paradox Explained.
  A similar discussion of the failure of spacetime diagrams.  

  Twin Paradox Animation.
  Alternative text, and animation of the twin paradox.  (Embedded youtube animation.) 

  Absolute Frame of Reference
  Absolute frame of reference in the physics community.

  Free pdf file of the book:

  Relativity Trail, free pdf format, with 192 pages, 65 diagrams 
  and 75 illustrations, will provide you with complete 
  detailed algebraic derivations of all the 
  kinematical effects of special relativity.  
  Everything is charted out in absolute terms against 
  the rest state of the universe for perfect clarity
  as well as soundness of theoretical basis.  It is 
  the totality of the universe that imparts the 
  inertial properties of clock rates and lengths
  which generate the effects of relativity.  This 
  is explained in detail in Relativity Trail.

  Excerpts from the book Relativity Trail with included images.

  Einstein explained in excerpts from Relativity Trail.

  Diagrams and derivations from the book Relativity Trail.


  Chaos etc - equations and graphical output.
  Eight equations generating exotic behavior,
  along with the program code and graphical output.

  RogCAD Girder and Panel Building Set
  3D CAD virtual building set, modeled after the 
  1957 - 1962 Kenner Girder and Panel building set.


  Jester   (His story and music videos.)

  The Hermit Thrush

  Uncle Remus illustrations by A. B. Frost


  restoration painting

  antique restoration

  Vintage American Locks


  home page: