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Still here? good to see!! :) juicy blender tute 105(B) - keyframe animation 2
Ok, we are up to the stage of having the cube start
at the right of the screen, move to the left over a period of 10 frames, then back to the original position at frame 30.

This was accomplished in the last tute if you've just joined us.
Now we want to make the cube stop still for
10 frames in middle.
It will stay in the same spot from frame 10 to frame 20 then continue back to its original position at frame 30.

We will duplicate frame 10 and place it at frame 20. We will also have to do some fine tuning (the fun bit!).
Let's begin...

Open your file from the last tute.
Go to frame 20 and with the IPOCurve window active press HOME to make the curves fill the IPOWindow.
Select the IPOCurve that has the arc in it by right clicking it so it changes colour.
Press TAB to enter EditIPO mode and right click select the Key at frame 10.

Press shift D to duplicate the Keyframe and while
holding CTRL so it snaps to position, drag the new keyframe to frame 20.

Now play back your animation and watch what happens.
You will see that between frames 10 and 20, the cube doesn't sit still like we thought.

This is because the IPOcurves are set to AUTO handle by default.
This means that they automaticly curve to the smoothest possible arc. We don't want that, we want
the IPO's to curve into frame 10 then sit straight for the next 10 frames, then curve again.
We accomplish this by changing keyframes 10 and 20 to VECTOR handles.
Making sure you're still in IPO editmode select keyframes 10 and 20 with a boxselect BKey and press VKey.
This sets them both to VECTOR handles. Notice how the arc is now straight.

If you play back your anim now you will see that the box comes into frame 10, then stops still until frame 20, then continues on its merry way until frame 30.

Beautiful!
If you wish you can play with the curves to make the box
come into stop smoothly like this. Just grab the handles on the IPO's and make the curve come in smooth.
Play around and have fun..
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