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Is there anyway to bake the UV coordinates from underlying geometry on a live pointcloud so I can still access and change the support colour textures?

I've had some success with baking the colour values themselves down to points but it would be helpful to have the UV coordinates still available so we can easily still change the support colour without re-baking.

I've had a look through the SDK documentation and can only see primitive_uv or support_primitive_uv being available for when creating a pointcloud and can't workout how to access on an existing pointcloud it as there's no .get for it?

Hmm
I'm not sure if you can transfer float data into the bake process for points, this would require to also work with udims ?

For now the best option is again Houdini and an attribute transfer
... but I'm also curious if clarisse could bake out data into points ...

Hi,

We'll see if this is feasible and keep you posted.

Cheers,

Thank you - I'm currently baking each map we need into the point cloud themselves which is making them considerably heavier.

Hi again!

You can get the UVs of Point Cloud points like this:

python code

obj = ix.get_item("project://scene/point_cloud")
geometry_point_cloud = obj.get_module().get_geometry().get_point_cloud()

pt_count = geometry_point_cloud.get_point_count()
print 'point count = {}'.format(pt_count)
for pt_index in range(pt_count):
    # get the point sample (GeometryPointSample)
    pt_sample = ix.api.GeometryPointSample()
    geometry_point_cloud.get_sample(pt_index, pt_sample)

    # get the sample descriptor (GeometryPrimitiveSampleDescriptor)
    sample_desc = pt_sample.primitive
    pt_id = sample_desc.id
    u = sample_desc.u
    v = sample_desc.v
    print 'pt {}: id = {}, uv = ({}, {})'.format(pt_index, pt_id, u, v,)

You can then bake the UV values in a Particle Container, in a property of type float and size 2.

For more details check the following links:
- GeometryPointSample: https://www.clarissewiki.com/4.0/sdk/st ... ample.html
- GeometryPrimitiveSampleDescriptor: https://www.clarissewiki.com/4.0/sdk/st ... ample.html

I hope this helps.

That's brilliant, thanks! I'll give it a go and let you know how I get on

Sorry for the slow reply - finally manged to get around to some testing today, am I right in thinking what we've baked down is the parametric UV of the object?

Yes indeed, those are the parametric uv coordinates on the object.

Ah got it, sorry we needed the object UV coordinates along with UDIM's. I managed to make it work by using the point colour baking workflow in the sdk help with a blended u and v gradient, think I was just over-complicating what we needed.

Glad to know that you found a workaround.