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The [[QC command]] [[$upaxis]] tells StudioMDL which axis in the .SMD file should be considered ''up''.  
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{{this is a|QC command|name=$upaxis}} It tells [[StudioMDL_(Source)|StudioMDL]] which axis should be considered 'up' in the model files below it. This is sometimes necessary because not every modeling package treats <code>Z</code> as the up axis, such as [[Maya]]. If unspecified, the up axis s <code>Z</code>.


* By default StudioMDL will assume the SMD file uses '''$upaxis Z'''.
{{note|The command affects only animations & models below it.{{tip|You can use this to incorporate animations from different sources, if necessary, by changing which axis is considered 'up' on the fly.}}}}
* SMD files exported from [[3DS Max]] and [[XSI]] do use '''$upaxis Z''', so there's no need to specify the $upaxis command in your QC file.
* SMD files exported from [[Maya]] (by default) use '''$upaxis Y''', so you need to specify <code>$upaxis Y</code> in your QC file.


=== Example Syntax ===
== Syntax ==
  $upaxis Y
  $upaxis <X|-X|Y|-Y|Z|-Z>


[[Category:QC Commands]]
== Exporters ==
This command is mostly used by Valve for reorienting models created in Maya, which treats the Y axis as up unlike the game engine itself (and many other modeling packages), which use Z.
 
;These exporters generally need $upaxis (Don't usually treat the Z axis as 'up'):
:[[Maya]] (Y)
;These exporters generally don't need $upaxis (Already treat the Z axis as 'up'):
:[[Softimage Mod Tool|XSI]]
:[[3DS Max]]
:[[MilkShape 3D]]
:[[Blender]]
 
== See also ==
* [[Modeling]]
 
[[Category:Maya]]

Latest revision as of 17:58, 3 August 2025

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$upaxis is a QC command available in all Source Source games. It tells StudioMDL which axis should be considered 'up' in the model files below it. This is sometimes necessary because not every modeling package treats Z as the up axis, such as Maya. If unspecified, the up axis s Z.

Note.pngNote:The command affects only animations & models below it.
Tip.pngTip:You can use this to incorporate animations from different sources, if necessary, by changing which axis is considered 'up' on the fly.

Syntax

$upaxis <X|-X|Y|-Y|Z|-Z>

Exporters

This command is mostly used by Valve for reorienting models created in Maya, which treats the Y axis as up unlike the game engine itself (and many other modeling packages), which use Z.

These exporters generally need $upaxis (Don't usually treat the Z axis as 'up')
Maya (Y)
These exporters generally don't need $upaxis (Already treat the Z axis as 'up')
XSI
3DS Max
MilkShape 3D
Blender

See also

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