Re: Keyframes

On 27 Jan 2006, at 22:26, Jim Henderson wrote:

> I've had a couple of weird experiences when using keyframes in 2.40  
> - I
> should note that I've fiddled a little with Blender in the past,  
> but am by
> no means an experienced user, so it's very possible that what I ran  
> into
> is something easily fixable.
>
> I created a very simple scene - using the default scene and  
> changing the
> light to a spotlight.  I wanted to have the spotlight sweep over  
> the cube.
>
> I set a keyframe at frame 250 with the spotlight just covering the  
> cube
> from one side.  Then I set a keyframe at frame 1 with the spotlight  
> at the
> other extreme of the cube.  The sequence when I follow through
> frame-by-frame was in the desired direction (sweeping "down").  When I
> generated the animation, however, the sequence was reversed, and  
> the light
> swept "up".
>
> I wondered if it might have to do with the order I added the  
> keyframes, so
> I went to delete them and set them back up again - only to find that I
> couldn't figure out how to delete the keyframes.
>
> My questions are these:
>
> 1.  Why did my animation flow backwards?  Was it because I entered  
> they
> keyframes from last to first rather than first to last?

Worked ok for me.

> 2.  How do I delete a keyframe?

IPO Curve Editor, hit Tab, right click on one of the nodes at the  
keyframe you want to delete, hit B and box in all the nodes you want  
to delete at that keyframe assuming there's more than one, hit x and  
accept the dialog. Or delete them individually like any other "object".

That's how I do it, but I just fiddle with Blender so maybe there's  
an easier way.

> 3.  On a related note, if I want to change the rotation point in  
> the IPO
> editor, is there a way to slide the rotation (for example) vertically?

Select it, hit G to grab it and relocate it where you want. Neat...

Peter