Visit: RogCAD Girder and Panel Building Set home page
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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
A vacation photo imported into RogCAD, being fitted with curves to generate a rotatable 3D model of the hull. It took about one hour to model. Turning the wireframe model into a surfaced model, below, took about five minutes:

RogCAD, for DOS and Windows operating systems Keyboard data entry CAD software, for technically oriented users. For hobby or productivity. If you would like to have a rotatable 3D wireframe model of your favorite sailing vessel or building, or perhaps of a building or object you are designing, send RogCAD whatever specifications you have along with a sketch or photo. I'll build you an accurate 3D model which you can manipulate on screen with the included copy of RogCAD for Windows. I'll also include several screen shots of your model in 3D surface modeling along with complete RogCAD instructions which will help you do your own custom design and surface modeling. If satisfied with your model, please remit $50 to $200, depending on the complexity of the model, at that time. 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. Several variations were modeled (just one shown here) and presented to the client, for a suggested fee of under $400. Here's another recent project for a house addition - New workshop/office.    05/13/03 update. FREEWARE: 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 on screen, 
      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.

   *  A user can acquire the proficiency needed for doing 
      simple designs within 30 minutes.  RogCAD can be 
      mastered in three days.  


 Limitations:

   *  Not compatible with any other CAD format.

   *  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.

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


 Roger Luebeck is the author of RogCAD.  It 
 was originally written to run on the author's 
 old IBM XT with the text-only monitor.  The 
 data points had to be plotted on paper by hand 
 and then connected with straightedge.

 From 1993 to 2001, the author developed it
 into its current form.  All equations, algorithms
 and code comprising RogCAD were developed solely
 by the author.

 RogCAD is freeware.


 RogCAD code

Twins Paradox (html)
Twin Paradox Abstract (pdf)
Clock Paradox Animation (html)
Spacetime (html)
Twins Paradox in Relativity (html)
Twins Paradox Theory
Synopsis (pdf)
Book