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 (Merged some stuff to Howto: Animate models)  | 
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* the y-axis runs sideways, towards the right    | * the y-axis runs sideways, towards the right    | ||
* the z-axis runs upwards    | * the z-axis runs upwards    | ||
*   | * roll is a rotation around the x-axis, where positive is clockwise viewed towards the back   | ||
* pitch is a rotation around the y-axis, where positive is clockwise viewed   | * pitch is a rotation around the y-axis, where positive is clockwise viewed towards the right   | ||
*   | * heading is a rotation around the z-axis, where positive is clockwise viewed upwards   | ||
[[File:heading.jpg|200px]][[File:pitch.jpg|200px]][[File:roll.jpg|200px]]  | [[File:heading.jpg|200px]][[File:pitch.jpg|200px]][[File:roll.jpg|200px]]  | ||
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