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3D Cartesian coördinates

  1. Apr 11, 2008 #1
    How do you draw an Cartesian 3D-axis-system?
    The Y-axis seems to have some perspective; what's the position of the observer?
    What's the 'way' of placement, and why?

    All 'links' are welcome.

    Dank u.
  2. jcsd
  3. Apr 11, 2008 #2


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    Welcome to PF!

    Hi Valianth! Welcome to PF! :smile:

    The convention is that you draw the z-axis up, and the y-axis anti-clockwise from the x-axis … but at an angle, so that it "looks" 3D! :smile:

    This is so that it agrees with the usual way of looking at 2D graph paper. And so that the cross-product (i x j = k) looks right!

    And you draw it from the perspective of someone in the x and z positive and y negative sector. :smile:

    … why were you asking?
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