Difference between revisions of "Talk:Quaternion"
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In the only succesfull attempt at a double quaternion, I rotated around the x/y diagonal 90 degrees. |
In the only succesfull attempt at a double quaternion, I rotated around the x/y diagonal 90 degrees. |
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| − | (That would be the vector <math>2^0.5x, 2^0.5, 0</math> ?) |
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| + | (That would be the vector 1x,1y,0z ?) |
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| + | I ended up with Q = 0.707 0.0 0.707 0.383 though.(x,z pos or negative depending on up/down, left/right orientation) |
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| + | Which looked to be working ok in-game. But according to the vector approach I probably ended up with a bigger z-angle than I intended. |
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--[[User:Arexack|Arexack]] 16:55, 12 September 2006 (UTC) |
--[[User:Arexack|Arexack]] 16:55, 12 September 2006 (UTC) |
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| + | Why can I not multiply a 180degree turn with another? |
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| + | (eg. Q1[0 0 0 1] * Q2[1 0 1 0] = Qt[1 0 1 0]) |
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| + | edit: two times 90 degrees z followed by a 90 deg y renders: |
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| + | Q1[0 0 0 1] * Q2[0 0 0 1] (=[2 0 0 2])* Q3[1 0 1 0] = Qt[4 0 4 0] = [1 0 1 0] !!! |
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| + | --[[User:Arexack|Arexack]] 17:29, 12 September 2006 (UTC) |
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| + | bump! |
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| + | (such activity! ;)) |
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Latest revision as of 16:20, 7 April 2007
the calculus might not work as expected....
hmm....
--Arexack 17:21, 11 September 2006 (UTC)
Indeed, it's wrong - I've submitted a corrected version.
--Aegidian 18:14, 11 September 2006 (UTC)
I thought it might be multiplying instead of adding, couldnt't find clear examples or description in the universal-wiki though. :(
It does work for simple rotations of 90degrees. :)
In the only succesfull attempt at a double quaternion, I rotated around the x/y diagonal 90 degrees.
(That would be the vector 1x,1y,0z ?)
I ended up with Q = 0.707 0.0 0.707 0.383 though.(x,z pos or negative depending on up/down, left/right orientation)
Which looked to be working ok in-game. But according to the vector approach I probably ended up with a bigger z-angle than I intended. --Arexack 16:55, 12 September 2006 (UTC)
Why can I not multiply a 180degree turn with another?
(eg. Q1[0 0 0 1] * Q2[1 0 1 0] = Qt[1 0 1 0])
edit: two times 90 degrees z followed by a 90 deg y renders:
Q1[0 0 0 1] * Q2[0 0 0 1] (=[2 0 0 2])* Q3[1 0 1 0] = Qt[4 0 4 0] = [1 0 1 0] !!!
--Arexack 17:29, 12 September 2006 (UTC)
bump! (such activity! ;))
