AutoCAD 2000/2000i/2002 Archive

AutoCAD 2000/2000i/2002 Archive

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*Lown, chris
Message 1 of 5 (1,115 Views)

2 point perspective views ?

1115 Views, 4 Replies
01-14-2003 01:23 AM
How can I create 2 point perspective rather than the standard three point
the comes with the 3D orbit ?
*Burba, Tony
Message 2 of 5 (1,115 Views)

Re: 2 point perspective views ?

01-14-2003 02:41 AM in reply to: *Lown, chris
as long as your viewpoint and target point are at the same z elevation, you
should get 2-point perspective. 3-point (converging verticals) comes only
when your view axis is "up" or "down", i.e. not parallel to the xy plane.


"chris Lown" wrote in message
news:C4E46DE502B0AAA994C891A846E34DDF@in.WebX.maYIadrTaRb...
>
> How can I create 2 point perspective rather than the standard three point
> the comes with the 3D orbit ?
>
>
*robfowler
Message 3 of 5 (1,115 Views)

Re: 2 point perspective views ?

01-14-2003 05:22 AM in reply to: *Lown, chris
Sorry about last blank post - finger trouble! I
double clicked on reply to group instead of a single click!!

 

Anyhow, I don't think that 2-point perspective is
an option in AutoCAD.

 

From the help files:

 

Perspective: Changes the view so that all
parallel lines converge at one point. Objects appear to recede into the distance
while parts of the objects appear larger and closer to you. The shapes are
somewhat distorted when the object is very close. This view correlates most
closely to what your eye sees.

 

3-point perspective is actually what the eye sees
but for illustrations of buildings 2-point is more often used. You could
manually do the drafting using 2 vanishing points but this makes 3D modelling
superfluous in the first instance.

 

I can think of no solution to your post other
than to convert your 3D model to 2D using SOLVIEW, SOLPROF, SOLDRAW and
then redraw the vertical lines and adjust the perspective lines to connect to
the redrawn vertical lines. But this seems as much work as 2D drafting the piece
to be drawn in 2-point perspective in the first place.

 

Rob Fowler.

 

 

>
> How can
I create 2 point perspective rather than the standard three point
> the
comes with the 3D orbit ?
>
>
*K, Albert
Message 4 of 5 (1,115 Views)

Re: 2 point perspective views ?

01-14-2003 09:12 AM in reply to: *Lown, chris
Try this: Create a sample 3d model. Go to view->3d views->viewpoint and
type in 0,1,0. This puts your view on the horizon line, looking right
down the Y-axis. Go to 3d orbit; from the right click menu choose
projection->perspective. (If your model disappears, you may need to
right click and choose more->adjust distance, which works much like to
real-time zoom, to retrieve it.) Your view will be a true one-point
perspective. If you then right click and PAN, the view will then become
2 point perspective - verticals remain vertical and the other planes
recede to vanishing points. It appears you can then PAN vertically and
horizontally without introducing the vertical distortion of true 3 point
perspective. Hope this helps.

chris Lown wrote:

> How can I create 2 point perspective rather than the standard three point
> the comes with the 3D orbit ?
>
>
>
*Lown, chris
Message 5 of 5 (1,115 Views)

Re:

01-15-2003 09:49 PM in reply to: *Lown, chris
Thanks for the reply's guys

I will try some of the methods u mentioned and see how I go.

Thanks for your time




"Albert K" wrote in message
news:3E24B56A.7050304@hotmail.com...
> Try this: Create a sample 3d model. Go to view->3d views->viewpoint and
> type in 0,1,0. This puts your view on the horizon line, looking right
> down the Y-axis. Go to 3d orbit; from the right click menu choose
> projection->perspective. (If your model disappears, you may need to
> right click and choose more->adjust distance, which works much like to
> real-time zoom, to retrieve it.) Your view will be a true one-point
> perspective. If you then right click and PAN, the view will then become
> 2 point perspective - verticals remain vertical and the other planes
> recede to vanishing points. It appears you can then PAN vertically and
> horizontally without introducing the vertical distortion of true 3 point
> perspective. Hope this helps.
>
> chris Lown wrote:
>
> > How can I create 2 point perspective rather than the standard three
point
> > the comes with the 3D orbit ?
> >
> >
> >
>
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