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Hiya
Sorry didn't come to work yesterday
...
In .fraw format, only one value is stored for each
tangent, so we assume that the length is actually derived from the difference in
the key-frame time values. I have all the curve & tangent information that I
need, and the distance between the key-frames. You said
that "Added tangent lengths on 2 successive
keys cannot be more than approx 1.25 of the distance between 2 keys ", do
you know the formula to compute the single value that .fraw needs for
each tangent, based on the information that I have?
p.s
Hopefully it will be cool yeah ...I've always
deeply enjoyed visuals synched to sound! From
disney's fantasia to gantz graff video clip ...it all rocks!
Would be nice to have something that helps you
explore that visual/sound perfect match ...although I'm realizing that using
waveforms won't get you very far. MIDI would be the way to go
afterall.
Anyhow I'll post a link soon for a beta version
anyone could try out and hopefully give some improvement feedback.
Cheers!
Alex
----- Original Message -----
Sent: Wednesday, June 27, 2007 6:04
PM
Subject: Re: tangent computation in .fraw
/ .fraw2 ?
Fraw and fraw2 simply store the tangents. Tangent syntax
requires 4 values per key (left length, left height, right length, right
height). Added tangent lengths on 2 successive keys cannot be more than approx
1.25 of the distance between 2 keys and when you add a key on an editor that
is ensured by the software.
But thats too simple, you must want something
else.
You want to create tangents from raw key data? The only way you
can do that is doing some recursive fitting algorithm.
Im not sure what
you are after but making fcurves from frequency sounds cool.
On 6/26/07, Alexander
Hemery <vortex(at)fhw.gr>
wrote:
nope..but thanks
-----
Original Message -----
Sent:
Tuesday, June 26, 2007 5:22 PM
Subject:
Re: tangent computation in .fraw / .fraw2 ?
Does the do what you are looking
for?
-----
Original Message -----
Sent:
Tuesday, June 26, 2007 9:47 AM
Subject:
tangent computation in .fraw / .fraw2 ?
Hello,
Anyone know how those tangent values in
.fraw/.fraw2 files are computed ?
We're doing a little application to get
fcurves from sound ..by using a selected frequency (not global
amplitude) ...but i can't understand what those tangent numbers derive
from ... Any ideas?
There's always the option of exporting
linear keys ...but what would be nice is to get a nice bezier with as
few keys as possible....
Cheers
--
Alexander Hemery
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