vla-insertblock rotation issue

I am writing a function to insert blocks with the vla method:

(vla-insertBlock mspace <insertion point> <xscale> <yscale> <zscale>
<rotation>)

the problem is with the rotation entry. I seems thru my experimentation that
the rotation has nothing
to do with the current ucs and everything to do with the system variable
"ViewTwist"

current ucs rotated 45 degrees from wcs - "ViewTwist" = 315 <radian
equivelent>
current ucs rotated 90 degrees from wcs - "ViewTwist" = 270 <radian
equivelent>
current ucs rotated 135 degrees from wcs - "ViewTwist" = 225 <radian
equivelent>

...... Just figured out something. the view angle on viewtwist goes
clockwise.

But, how do I invert this number to a usable rotation in the
vla-insertBlock....

Am i heading in the correct direction, or am i just flailing in the deep
end???

Robert Good.

 

Robert,

The angle is in WCS. ViewTwist has nothing to do with it (other than
affecting what you see on the screen).


--
R. Robert Bell, MCSE
www.AcadX.com


| I am writing a function to insert blocks with the vla method:
|
| (vla-insertBlock mspace <insertion point> <xscale> <yscale> <zscale>
| <rotation>)
|
| the problem is with the rotation entry. I seems thru my experimentation
that
| the rotation has nothing
| to do with the current ucs and everything to do with the system variable
| "ViewTwist"
|
| current ucs rotated 45 degrees from wcs - "ViewTwist" = 315 <radian
| equivelent>
| current ucs rotated 90 degrees from wcs - "ViewTwist" = 270 <radian
| equivelent>
| current ucs rotated 135 degrees from wcs - "ViewTwist" = 225 <radian
| equivelent>
|
| ..... Just figured out something. the view angle on viewtwist goes
| clockwise.
|
| But, how do I invert this number to a usable rotation in the
| vla-insertBlock....
|
| Am i heading in the correct direction, or am i just flailing in the deep
| end???
|
| Robert Good.
|
|

 

Thanks Robert.
I will look into getting the x axis of the current ucs and converting that
to an angle relative to the wcs.

Thanks again,
Robert Good.