3D Cartesian coördinates

  • Thread starter Valianth
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Main Question or Discussion Point

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.
 

Answers and Replies

tiny-tim
Science Advisor
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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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