Re: CAD Drawing

From: Sam (qdo_at_datawave.ca)
Date: 08/04/04 

Date: Wed, 4 Aug 2004 09:39:51 -0700

Gerald,

Thanks for the tips. I saw some people used picture box control to draw
wireframe in VB6; what would you recommend me with .Net? I want use picture
box control to do this because I'm more familiar with it but some of the
features of the picture box control in VB6 such as ScaleMode have
disappeared.

Sam

"Cablewizard" <Cablewizard@Yahoo.com> wrote in message
news:OW4$2CZeEHA.3632@TK2MSFTNGP09.phx.gbl...
> Sam,
>
> Well, you will definitely need to become intimately acquainted with
> transformation matrices. You should take a look at www.magic-software.com.
There
> are a number of resources that you should find helpful. There are a number
of
> books on the subject, but most of them are IMHO very poor. Oftentimes they
read
> something like 1. This is a line. 2. This is how to perform back face
culling in
> 3D using wiremeshes. And they skip all the stuff you really need to know.
> Another interesting note, is that the majority of the books I've seen just
end
> up referring back to stuff on the magic-software site anyway. The best
book I
> have found so far is Geometric Tools for Computer Graphics. You can find
info
> about it on that site as well. It is not terrific, but the best one I've
found
> so far. In fact, I have had the itch to write a Dummies Guide to
Computational
> Geometry. Too bad there's little money in writing these types of books.
:-(
>
> Another thing that might help...
> If you have access to a CAD package, you should really play around with
coding
> in there, this way you can see the results of things much easier. Then
once you
> feel you have a good grasp on the concepts of view and such, then start
coding
> your own. In my spare time I have been working on a Geometry Objects
framework
> for dealing with simple vector objects. If you find certain things you
need, I
> might have some classes I may be willing to share. As far as rendering, it
won't
> do that yet, as I am just now getting into this myself and am learning a
lot.
> Mostly what not to do :-) But it helps tremendously when interoperating
with
> ArcView, AutoCAD, and Microstation.
>
> If you have any specific questions, feel free to let me know.
>
> Gerald
>
> "Sam" <qdo@datawave.ca> wrote in message
> news:%23PEOPsYeEHA.3632@TK2MSFTNGP09.phx.gbl...
> > Hi Gerald
> >
> > For the math part, I think I'm ok. For the coding part such as
coordinates
> > system, grid lines/points zoom in and out function, I'm stuck. I find
this
> > complicated because when user zoom in/out the units on coordinate system
> > change
> >
> > Sam
> >
> >
> > "Cablewizard" <Cablewizard@Yahoo.com> wrote in message
> > news:ug4iYgYeEHA.3840@TK2MSFTNGP10.phx.gbl...
> > > Personally, I do not know of any "good" sites to help you along.
> > > When you say you have never done this before, do you mean coding such
a
> > thing,
> > > and/or the math behind it? This might help me lead you in the proper
> > direction.
> > > You will quickly find out that CAD/Vector graphics can be very
different
> > than
> > > normal GUI graphics.
> > >
> > > > 2. Is VB.Net GDI+ robust enough to do the job
> > > This is a loaded question. It really depends on your needs. As far as
> > VB.Net, it
> > > should be, but might depend on how you end up implementing the
> > presentation
> > > layer. If you use GDI (not +), you would want to look into C++, maybe
C#.
> > As far
> > > as GDI+, it depends on how you use it. You might want to look at
> > DirectDraw. But
> > > you may find it to be more trouble than what you need.
> > >
> > > Gerald
> > >
> > >
> > >
> > > "Sam" <qdo@datawave.ca> wrote in message
> > > news:OZn6OQYeEHA.596@TK2MSFTNGP11.phx.gbl...
> > > > Hello everyone
> > > >
> > > > I want to write a quick 2D/3D CAD application (I have never done
this
> > > > before) which reads data (such as coordinates) from a text file and
draw
> > > > grid lines/points on screen (this application does not display any
> > bitmap
> > > > image. It basically displays lines and points). The application also
has
> > > > zoom in/out functions, rotate wire-frames around, and origin of the
x-y
> > > > coordinate system near the bottom left corner of the screen (not top
> > left).
> > > >
> > > > 1. Does anyone know any websites or have articles on this subject
> > > > 2. Is VB.Net GDI+ robust enough to do the job
> > > >
> > > >
> > > > Sam
> > > >
> > > >
> > >
> > >
> >
> >
>
>

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