#Earthquake II
4 messages in this thread
– Reply to message #128841 (already scrolled)
Steve,
After seeing your message up here a few times "Here is a long shot"- I had a
problem with a shaking Camera linked to a dummy object on a path imported from
AutoCAD. This sounds different from what you are describing, but I will outline
the steps in which I created this project and then the problem I found with my
shaking camera.
*1. The project was a large civil site created from GIS Data and AutoCAD R12.
*2. I used VisualLink to create the 3DS file (this seemed much faster than
converting a 3 meg DXF file). *3. Created the Camera movements in AutoCAD with
a DXF and also tried exporting 3Dpoints using Mark Meier's CALC KXP to import
the path. *4. Used Tempo to create the drive-by of project (approx. 2 miles @
60 mph).
Being a long time AutoCAD user and my largest 3DS project (5 megs), I over
looked a problem in 3DS3 which should have been my first clue, the coordinate
display was locked at 1000000.0,1000000.0 !!! (ACAD F6 coords ON/OFF). This
seemed to be the limit of 3DS. The project was imported from GIS Data, at
6350000.0,1875000.0 and the vertices fell on the nearest random point that they
could find and I could never get the points between the Keys to smooth out. I
moved everything back to 0,0,0 and all was well! At first this looked like a
import problem with the DXF path or the GIS Data being inaccurate, after two
weeks of fighting this problem I became at ease with Key framing very fast.
Mike Morgan, CAD Forms Inc.
P.S. I had to deliver this job with the bumpy path, I just told the client
that we were in a big semi-truck<G> Good luck Steve, I know how you feel!
Mike, you hit on EXACTLY what Steve's problem was. He had a small scene, but
it was offset about 700000 units from the origin in one axis and 300000 units
on another axis. That, plus the scale of the scene itself, caused enough
single-precision floating-point roundoff error to make the camera shake during
the animation.
The solution for Steve would be to just translate the models to the origin, and
then all would be fine.
– G
Gary,
I opened up my project to check out the status line to see what number the
units were locked on. Here's the information I found- X:83333'4" Y:83333'4"0
Z:0'0"0. Glad to help out on this problem.
-Mike Morgan, CAD Forms Inc
Thank You, Thank You, Thank You!!!
S.