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I'm creating some simple beam with rotation about X

  1. Mar 5, 2012 #1
    hello.
    I'm creating an ifc importer.
    I'm creating some simple beam with rotation about X , about Y and about Z.
    These are the matrixes that i get:

    1)Rotation about Z
    0.8|0.5|0.0
    0.0|0.0|1.0
    -0.5|0.8|0.0
    i know that the real rotation about Z is :
    0.8|0.5|0.0
    -0.5|0.8|0.0
    0.0|0.0|1.0

    then i must swap the axis y with z


    1)Rotation about X
    0.0|0.8|0.5
    1.0|0.0|0.0
    0.0|-0.5|0.8

    i know that the real rotation about X is :
    1.0|0.0|0.0
    0.0|0.8|0.5
    0.0|0.5|0.8

    then i must swap the axis y with x


    1)Rotation about Y
    0.8|0.0|0.5
    0.0|1.0|0.0
    0.8|0.0|0.8

    that is a correct Y rotation matrix.

    Exist a matrix that multiplied for the Z matrix rotation swap the y axis with the z axis and
    that multiplied for the X matrix rotation swap the y axis and the x axis?
    thanks.
     
  2. jcsd
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