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Why copying a transform to txt get a 4d rotation “XYZW”?

alt text

When I copied this transform array to a txt file, I got the following data:

((Rotation=(X=-0.038135,Y=-0.189308,Z=0.239298,W=0.951549),Translation=(X=1.000000,Y=0.000000,Z=0.000000),Scale3D=(X=1.000000,Y=1.000000,Z=3.000000)),(Rotation=(X=-0.069881,Y=-0.498913,Z=0.300647,W=0.809823),Translation=(X=0.000000,Y=2.000000,Z=0.000000),Scale3D=(X=1.000000,Y=2.000000,Z=1.000000)))

While the Location and Scale data got right, the Rotation data were transformed to a 4d vector of XYZW. I wonder how to get the transformation formula?

Product Version: UE 4.11
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asked May 26 '16 at 03:24 AM in Blueprint Scripting

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aldyszhao
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answered Oct 27 '18 at 11:18 AM

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Artem K
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