3 Replies Latest reply on Jun 25, 2010 5:35 AM by Regiolanthe

# How do I reverse the orientation of the perspective gride?

Hi - Totally new to the persepctive grid (CS5), and playing around with it.

I was wondering if there was a quick and easy way to "mirror" the perspective grid? Say I'm looking directly a small rectangular box (say 13 cm wide x 4 cm high x 9 cm deep). I create a perspective grid:

• 3 point perspective to see top, front, and edge of box
• units in cm
• scale 1:1
• viewing angle: 10 deg.
• viewing distance 40 cm.
• horizon height 10 cm
• third vanish point: 0 x -30 y

So I get a very nice looking grid, as if I was viewing the box from left of center (so that I am looking at the front and left edge of the box - or right orange gridge = front and left blue grid = left edge)

Is there an easy way to "mirror" the perspective - so that it would appear that I was viewing the box from right of center (so that I am looking at the front and right edge of the box, so that left blue grid = front, and right orange grid = right edge of box)?

I'm not sure what numbers I have to reverse to do this.

TIA for any help for a noob.

geo

• ###### 1. Re: How do I reverse the orientation of the perspective gride?

Leave everything else the same, but set Viewing Angle to 80 deg.

• ###### 2. Re: How do I reverse the orientation of the perspective gride?

Geo -

We are all "noobs" with perspective drawing at this point.

If I understand correctly what you are trying to do, you can go under the View menu and choose "Lock Station Point." Then with the Perspective Grid tool selected, drag the top vanishing point to the right. Your grid will appear to rotate around the ruler origin at the center.

• ###### 3. Re: How do I reverse the orientation of the perspective gride?

Thanks both for your answers. The 80 degree answer did the trick. The rotating on axis after locking the station point did flip the orientation, but  I couldn't seem to maintain the same angles when inverted. Must have been doing something wrong -

For some reason, I thought the viewing angle corresponded to the "top down" viewing angle (like - if I was above the object looking down, what my angle from the surface would be).

Learning!

I have to say it's a pretty handy tool for someone who has to draw a bunch of box-like equipment!

Thanks again to you both,

Geo