There is software that will allow you to do this without all the machinations you're
putting yourself through. Try Canopus Imaginate. There's another one out there, I
can't remember it's name...it has a new version and is supposed to be better than
Imaginate.
Good luck.
Steve
>>> [EMAIL PROTECTED] 3/16/03 6:48:11 PM >>>
Hello,
I have been pulling what hair I have out over this one for the past
couple of years. Doing a little issue house keeping and was wondering
if the best and brightest here might be able to help me out.
I would like to do a ken burns type effect on panning over an image
where you specify two or more points on the image, and the camera
smoothly moves from one point to another in an smooth curve, not a
straight line from point to point.
I had created a system that would create a curve using splines in a
100 X 100 box and then the app would scan the line and use that as a
reference to the percentage difference in XY to position the center of
the view. But it only works for moves of 100 frames or less and I need
it to be parametric for any feasible distance from point 1 to point 2.
OpenInventor and VRML98 (as applied in cosmo worlds the ill-fated vrml
editor) used a system where you would have key frames; a specified set
of floats that would be within a range (0.0 to 100.0) representing the
percentage of transit of each key frame in the animation.
Let us say 3 points, [a:0.0, b:45.0, c:100.0]
You would then apply translations, rotations or whatever to each of
these points. We will just apply a point in 2D space to each of these
locations.
[a:[0.0,point(120,240)], b:[45.0,point(600,440)],
c:[100.0,point(1200,500)]]
Then you could assign a curve calculation (tangent type) to the
animation and the system would spit out a set of frames based upon a
total time for the transit and the frame rate for the time.
transitTime = 30 -- seconds
frameRate = 15 -- fps
tangent = #hermite -- hermite or linear
The next challenge is to add acceleration and deceleration into the
mix, but that is another problem entirely.
My big problem is in applying the curve calculations. Not being big on
the whole trig-calc thing puts me at a distinct disadvantage. (Kids
listen: math does add up in the long run).
Any thoughts?
Thanks,
Nat
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