why is the object twisting?

Support Modeling
1

it is an attempt at a book.
the bone is rotating the box (cover) about 90 degrees. takes 150 frames
starts okay- ends okay - but around frame 75 it looks like it twisted. why?
and
when it is at frame 150 what causes the little white bits at the top and the bottom of the f12 picture?

thanks for your great help.

Attachments

BLENDER TRAVEL BOOK-2ANIMATE7.blend (896 KB)

whyatanoddangle.JPG733×649 22.6 KB

endsokay.JPG777×424 15.2 KB

2

can i only put three things in a forum post?

3

On frame 150, you have a small amount of rotation in the X and Z axis.

4

thanks, all i did was rotate it about 90degrees.
any idea why it would rotate in the other axis?

5

Could be that you weren’t properly aligned when you rotated it, it’s better to just type in 90 degrees manually since it’s also faster.

6

thanks
will do
and
when it is at frame 150 what causes the little white bits at the top and the bottom of the f12 picture?

7

Also, if the book cover is only going to rotate on one axis, use the lock buttons in the N-Panel, Transform pane, to lock the axis’ you don’t want twisting. It just cleans it up, and prevents the problem if you’re doing mouse rotations, from an odd view direction.

8

If it’s the gray rectangle in this picture that you mean then it’s overlapping geometry.

upload.png960×540 20.8 KB

9

thanks
where is the N-panel? and the lock buttons. i have ten pages to rotate!
i will also be curving them with the modifier - simple deform?-bend-angle. where do i click to “i” that thingy

10

because of that little angle thing. thanks. i set them to zero and they disappeared.
thanks

11

The N-Panel is the Properties panel on the right of the 3-D view. Press N a couple times to see where it’s at. To “Insert Keyframe” on a number input field, press I while hovering your mouse over the number field, or right click it and choose “Insert Keyframe.”

12

thanks for your very clear help