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As a result of frustration on my part and inspiration on
Bill DeWitt's part (see "Rotate list" in povray.general),
I've come up with a set of macros that allow easy
rotation of objects in arbitrary axis order.
The macros return a single rotation vector that will result
in the same object rotation as though you had used
multiple rotation statements.
I can turn this code:
object { MyObject
rotate 30*y
rotate <40,0,60>
}
Into this:
object { MyObject
rotate yxz(30,40,60)
}
Admittedly, here it's not that big of an improvement.
However, when I wanted to store a rotation vector in a
variable to use later, it was prohibitively difficult to have
the rotations done in any order except x then y then z.
Now I can do this:
#declare ROT = yzx(20,30,40); // 20*y, 30*z then 40*z
// ROT is now < 33.856616, -2.292945, 35.467006>
object { MyObject rotate ROT }
I mainly did these for myself, but thought others might
like them, too. I hope some of you can find some use
out of these.
--
Tom Bates
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Attachments:
Download 'RotateList.inc.txt' (2 KB)
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