Axes origin/direction in 3d plots, advice?

[norru]

Hi, all, looking for some advice.

In all examples I've seen, origin is top right, y grows "down" and "x" grows left, as shown here:

I am looking of an example that shows how to configure the x and y axes in a 3d plot so that:

• (0,0) is at bottom left of the diagram
• z axis grows "towards the observer" (this is already correct)
• y axis grows "up"
• x axis grows "right"

Thanks,
Nico

[mkborregaard]

Oh yeah, that seems like it should be the default?

[asinghvi17]

You can move the camera using rotate_cam! and translate_cam!

[norru]

Huh? Does camera movement flip the axes?

[asinghvi17]

Ah, my bad - I think I misinterpreted what you were asking for. In 3D axes, without fiddling with the code, I don't think this is possible because of some scaling issues we have with negative scale - but you could try scale!(scene, -1, -1, 1)...otherwise you could change your input data to the desired orientation, and assign ticks manually.

[norru]

Uhm, fiddling with the data is a no go. Guess this is kind of a showstopper for now if scaling does not work.

What is the rationale behind the nonstandard axis direction?

[mkborregaard]

@asinghvi17 is this just some kind of oversight, or am I thinking wrongly about this? I don't ever believe I've seen flipped axes by default for 3d in other plotting packages.

[ffreyer]

This is very old now so I'll close this.

The coordinate system as it is (and was) is right handed as it should be. You can get to

* (0,0) is at bottom left of the diagram
* z axis grows "towards the observer" (this is already correct)
* y axis grows "up"
* x axis grows "right"

through rotations/explicitly setting update_cam!(scene, cameracontrols(scene), eyeposition, lookat, up). The axes are not made for this though.

Also scale!(scene, -1, -1, 1) doesn't really mess with your data. It sets a transformation that applies to everything in the scene, meaning every piece of data and the coordinate system. It's no different that the transformation the camera applies at that point.