Options for lens focal length in perspective view?

Rhino Rhino for Windows
1

Hi, V5

match lens focal length
match lens focal length766×715 102 KB

trying to match my perspective view to a photo to help get items same size, namely the pair of plates.
However when I get the one pole matching, and the C beam, the other is way off, yet they are parallel I have that ‘in the bag’.
so clearly perspective view has a different idea on the focal length its using than was used in the photo.

Are there options anywhere to alter focal length ?
I am in V5 at the mo,
have V8 as well.

Cheers

Steve

2

_ViewportProperties

image
image769×906 21.7 KB

3

Are you aware of the command _PerspectiveMatch?

PerspectiveMatch | Rhino 3-D modeling

4

Hi,
Thanks,
altering the focal length from 50 to 90 is getting there, however trying to rotate the beam , I cant control the image on rotate/tilt)
I look for a video on use of PerspectiveMatch,

it sounds like its what I need, but I need to see it in use with a GOOD video.
a quick youtube search found rubbish vids.,
Is there an official McNeel video well spoken in ENGLISH with no awful music etc ?

Cheers

Steve

5

PerspectiveMatch | Rhino 3-D modeling

This tells you exactly what to do, no?

If you have trouble, maybe post a file with geometry and your image…

6

Hi,
HELP !
i removed wallpaper (clicked on remove) and view is black with grey dot.
how do I get my perspective viewport back to normal ?

Its put my rhino out of action with no perspective viewport now.

I had followed that,
initialy the image was hidden behind my grid, which at the scale I am working was almost all white.
run the command and the grid went, but needing to zoom in for placement doesnt happen.
I am tring to place accurate points and no means to zoom in to do so.
I did 6 pairs as best as was possible, try locating the same point on the side of a cylinder !
I need to match the angles of the two cylinders and the C section beam,

I need it to say draw an edge, then draw same edge on model.
picking points when the model is being made, is going to fail.
the whole point is to establish where structures should be, the shapes are a WIP.

even the one pole was placed to sort of match the photo as normally its many feet away, this trolley has been cut n shut, bringing the middle pole up to the rear cross member.

so matching edges not points is what I need, and the text doesnt say of that.

I did my best enter and got nothing at all. trolley crazy angle when I zoomed out.

now all is black.
:worried:
Steve

7

I am now out of that,
ye gods , scary.
what the heck happened.

had to post a new thread so it would be seen.

Jeremy said try _4view twice perhaps,
once was no good
twice and back to normal.
Thats a scary command, to get out of.

why ?

and it didnt work, need match edge as well as points.

Steve