Coordinate System

[williamsellick]

Hi,

I have been wondering about the coordinate system used in xith and what the default setup is when you create a blank canvas. It
seems to me (from some small programs I have written) the default for the axis is objects appear on the x / z plane and the height
is the y axis. Is this the standard? From most of the things I have read about mathmatics it is general practise for objects to be on
the x / y plane and the height on the z axis. Is it just my examples or is this the default setup? if so why is it not implemented the
other way round?

Thanks
William

[arne]

It's simply a thing of definition. I for example use Xith3d and have z up, simply because I'm used to having z up.
And for a default setup you'll simply have to define it and this is the way xith3d developers decided to do it.
I would simply set the View-Position always at the beginning with View.getTransform().lookAt(), so you're independent on the default setup.

Arne

[croft]

I have been wondering about the coordinate system used in xith and what the default setup is when you create a blank canvas. It
seems to me (from some small programs I have written) the default for the axis is objects appear on the x / z plane and the height
is the y axis. Is this the standard? From most of the things I have read about mathmatics it is general practise for objects to be on
the x / y plane and the height on the z axis. Is it just my examples or is this the default setup? if so why is it not implemented the
other way round?

I found this but the graphs are not quite right:
http://en.wikipedia.org/wiki/Cartesian_coordinate_system#Orientation_and_.22handedness.22

By default, both Xith and COLLADA use a right-handed coordinate system with y up.

Perhaps this is graphed properly in the Java3D or Xith tutorial documentation?