Create asset to set units = kilometers

[Carl Drews]

I want to have the asset section of my .dae file to look like this:

  <asset>

    <created>2021-03-09T16:44:30.798955</created>

    <modified>2021-03-09T16:44:30.798960</modified>

    <unit name="kilometer" meter="1000" />

    <up_axis>Z_UP</up_axis>

  </asset>

Here is my Python code:

mesh = collada.Collada()

unitKm = collada.asset.Asset(title="unit", unitname="kilometer", unitmeter=1000)

mesh.assetInfo.unit = unitKm

axis = collada.asset.UP_AXIS.Z_UP

mesh.assetInfo.upaxis = axis

print("assetInfo = {}".format(mesh.assetInfo))

print("assetInfo.unit = {}".format(mesh.assetInfo.unit))

print("assetInfo.upaxis = {}".format(mesh.assetInfo.upaxis))

Here is the output:

assetInfo = <Asset title=None>

assetInfo.unit = <Asset title=unit>

assetInfo.upaxis = Z_UP

But the asset section of my .dae file is missing the units:

  <asset>

    <created>2021-03-09T19:51:49.562205</created>

    <modified>2021-03-09T19:51:49.562209</modified>

    <up_axis>Z_UP</up_axis>

  </asset>

It should be easy to add one XML element. Is there some collection of assets that I am not finding in the documentation and examples?

[Jeff Terrace]

The assetInfo property is an instance of Asset:
https://pycollada.readthedocs.io/en/latest/reference/generated/collada.Collada.html#collada.Collada.assetInfo

I think you want:
mesh.assetInfo = unitKm

instead of:
mesh.assetInfo.unit = unitKm

You can also pass upaxis to the constructor of Asset instead of setting it after the fact like that.

Jeff

--
You received this message because you are subscribed to the Google Groups "pycollada" group.
To unsubscribe from this group and stop receiving emails from it, send an email to pycollada+...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/pycollada/4093d9c7-9f07-4284-a104-9c625072915cn%40googlegroups.com.

[Carl Drews]

Jeff, thanks so much! That solution works. Here is the new Python code:

mesh = collada.Collada()

axis = collada.asset.UP_AXIS.Z_UP

assetSection = collada.asset.Asset(

   title="Simple demo of mapping texture to flat surfaces.",

   unitname="kilometer", unitmeter=1000,

   upaxis=axis)

mesh.assetInfo = assetSection

Here is the resulting Buildings.dae:

<COLLADA xmlns="http://www.collada.org/2005/11/COLLADASchema" version="1.4.1">

  <asset>

    <created>2021-03-10T09:12:19.674806</created>

    <modified>2021-03-10T09:12:19.674808</modified>

    <title>Simple demo of mapping texture to flat surfaces.</title>

    <unit meter="1000" name="kilometer" />

    <up_axis>Z_UP</up_axis>

  </asset>

Carl