i get that rotating using quats involves x y z and w, where x y and z is a vector that defines an axis about which you rotate by w, but what is w in? its not degrees, and its not radians, and its not cos degress..... arg
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Anonymous2007-07-12 16:43 ID:+NumBveX
never heard of these things myself. could it be in any unit you want?
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Anonymous2007-07-12 17:57 ID:B/NmtQwd
Wikipedia says:
It turns out that the angle of rotation α is also easy to read off if we are dealing with a unit quaternion z = a + v: we have a = cos(α/2).
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Anonymous2007-07-12 22:39 ID:nHwvg4L7
What is the subject?
It its below the first level of calculus, you only use y, x, and z....But if its physics, then w can just be measuring x, y, and z against something like time...Radians and degrees are only ways to express the answer (since they can easily be converted)...so if x, y, and z are using either, so will w(unless your problem is just busy work to convert)