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Rotation Data (Nodes)

  1. Aug 3, 2005 #1
    I had to rotate four nodes x,y,z around the z-axis, then the x-axis using rotation equations and an angle. The whole point of the program is to change the input data into a new coordinate system. I think that my data looks right, but I need a second opinion.

    Input

    x | y | z

    1.| 0.00 | 0.00 | -2.00
    2.| -10.00 | 0.00 | -2.00
    3.| 0.00 | 5.00 | -2.00
    4.| -10.00 | 5.00 | -2.00

    Output

    -10.0000 -0.742781 -1.85695
    0.00000 -0.742781 -1.85695
    -10.000 4.64238 -1.85695
    0.00000 4.64238 -1.85695
     
    Last edited: Aug 3, 2005
  2. jcsd
  3. Aug 3, 2005 #2

    EnumaElish

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    Science Advisor
    Homework Helper

    I am not an expert on this, but as I try to visualize:

    On the room floor, the X axis runs W-E, Y axis runs S-N. Z axis runs floor-ceiling.

    Your 1st node is located on the Z axis 2 inches below the origin. You first rotate it around the Z axis, and it stays where it is. You then rotate it around the X axis, shouldn't its new coordinates be (0,0,+2)?
     
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