I'm taking Jonathan Williams's course on the "Modeling a Post Apocalyptic Vehicle". https://cgcookie.mavenseed.com/lessons/modeling-the-wheels
@7:50 He rotated the empty for the wheel and the mesh follow it.
Somehow, mine doesn't. When I rotate the empty in the x-axis, the small part of the wheel break apart while the array modifier is on. I'll share the blend file: https://drive.google.com/file/d/1rXv0zOEv9_XgEaahPMVOxL3CrxMF5_Yt/view?usp=sharing
Here are the examples what I mean:
BEFORE
AFTER
Hey euv
I downloaded your file, it works fine.
Remember to select and rotate the empty, after changing the settings for the Array modifier which is on the wheel.
(I didn't when I first checked your file)
What is happening? The array modifier is basically duplicating the wheel segment 8 times, then with the empty as the object offset, each segment is rotated by the same amount as the empty in relation to the previous segment.
For example: rotating the empty 45°, will rotate segment 2, 45°from segment 1. segment 3, 45° from segment 2, No4 45° from No3, No5 45° from No4, etc., etc..
Modeling 1/8th of the wheel means the rotation needs to be precise at 45° to fill the circle.
Rotating more (or less) than 45° will break the full circle with 8 equal segments.