Moving keyframes

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On 14/11/2008 at 12:13, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   10.1 
Platform:      Mac OSX  ; 
Language(s) :   C.O.F.F.E.E  ;

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Hello,

is it possible to move the keyframes of an object? I get the impression that these commands (bottom post) may hold the answer, but I don't know where to start. With R11 is it possible to shift Motion Clips along the timeline?

Thanks

Jon

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On 14/11/2008 at 13:12, xxxxxxxx wrote:

You can move keyframes in R11 but not R10 and there is no access to R11 Motion Clips (not even in C++ afaict). The COFFEE in R10 was still R9.5-related but the entire animation system changed in R10.

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On 14/11/2008 at 13:21, xxxxxxxx wrote:

Ah OK... thanks for all the help Robert. So how would I go about doing that in R11? I'd like to have a crack on the demo.

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On 14/11/2008 at 14:10, xxxxxxxx wrote:

Good question. I haven't used any new R11 COFFEE features yet. As that post you linked pointed out, there are a new set of classes for the new animation system - but no COFFEE docs yet to explain the innards. I'd suspect some similarities to the same C++ classes but then... (and Matthias points that out)

The problem is how to get at the object's animation tracks. It may be as simple as op->GetFirstTrack() or it may be the new C++ way as in op->GetFirst C Track().

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On 14/11/2008 at 14:23, xxxxxxxx wrote:

Thanks again. I'll have a play when I get a chance, and let you know of any findings if I have any luck (with my limited experience I wouldn't hold your breath though

Some official documentation would be very welcome.

Jon

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On 17/11/2008 at 11:13, xxxxxxxx wrote:

OK... with R11 I've managed to change the key frame values:

main(doc,op)
{
var obj = doc->FindObject("Cube");
var track = obj->GetFirstCTrack();
var myKey = track->GetCurve()->GetKey(0); // key 0 is first key frame
myKey->SetValue(track->GetCurve(),70); // in this case, changes x pos to 70 m
}

That's all good, but I can't figure out how to move the keyframe positions in the timeline. This doesn't work (an attempt to move the key frame to frame 10:

myKey->SetTime(10,doc->GetFps());

Does anyone know how to achieve this?

Thanks

Jon

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On 17/11/2008 at 11:32, xxxxxxxx wrote:

In C++, it is: key->SetTime(CCurve, BaseTime);

So, you might want to try it like this:

var time = BaseTime();
myKey->SetTime(track->GetCurve(), time->SetFrame(10,doc->GetFps()));

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On 17/11/2008 at 11:53, xxxxxxxx wrote:

Hey Robert,

thanks for the super quick reply!

An error is thrown at BaseTime() ... 'CLASS is not a function'.

I tried swapping with:

var time = myKey->GetTime();

... but nothing happens.

Any thoughts?

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On 17/11/2008 at 12:58, xxxxxxxx wrote:

That's interesting considering there is a function in the BaseTime class BaseTime().

You could try:

var time = doc->GetTime();

and go from there.

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On 17/11/2008 at 15:25, xxxxxxxx wrote:

Thanks again, but no joy. I've tried all manner of nonsense, but I'm shooting in the dark.

Is this to be unknown until official documentation?

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On 17/11/2008 at 15:56, xxxxxxxx wrote:

I think you must fill the BaseTime with a value.

var bt = new(BaseTime);
bt->SetData(/*the time you want*/);

You then use bt as your time to set a key (or anything else).

Cheers
Lennart

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On 18/11/2008 at 02:50, xxxxxxxx wrote:

Blimey what a palaver that was!

Thanks so much Robert and Lennart for helping to steer me in the right direction.

This seems to work:

> \> main(doc,op) \> { \> \> var obj = doc->FindObject("Cube"); \> var track = obj->GetFirstCTrack(); \> var myKey = track->GetCurve()->GetKey()); // key 0 is first key \> var time = new(BaseTime); \> time = doc->GetTime(); \> myKey->SetTime(track->GetCurve(), time->SetFrame(10,doc->GetFps())); // move key frame to frame 10 \> \> } \>

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On 18/11/2008 at 04:38, xxxxxxxx wrote:

Apologies, major balls-up!

Above code doesn't work (aside from typo 'GetKey(0)') - don't know what's going on - I did get it to work, but not with above code. Aaah!

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On 18/11/2008 at 05:14, xxxxxxxx wrote:

Phew! I'm able to wipe that ostrich egg off my face...

main(doc,op)
{

var obj = doc->FindObject("Cube");
var track = obj->GetFirstCTrack();
var myKey = track->GetCurve()->GetKey(0)); // key 0 is first key
var time = new(BaseTime);
time->SetFrame(10, doc->GetFps()); // move key frame to frame 10
myKey->SetTime(track->GetCurve(), time);

}