https://ar.qualcomm.at/qdevnet/sdk , under Getting Started > Mastering Advanced Topics > Swappable Datasets.

You should be able to retrieve the dataset using Unity's WWW class - http://unity3d.com/support/documentation/ScriptReference/WWW.html

Awesome, thanks for the quick reply!

I am still having a bit of trouble getting these swappable datasets working. The function DataSet.Load() only accepts a string as a path, so how would I get a file in there that I downloaded through a WWW form from unity?

As far as I know, I can only retrieve files as a variable through that.

Thanks in advance.

There is a DataSet.Load method that takes the storage type as well. Here you can use an absolute path:

dataSet.Load(dataSetPath, DataSet.StorageType.STORAGE_ABSOLUTE)

- Kim

Yeah, I came across that, but I seem to be missing a link here.

Say, for example, when I download a DataSet on an android phone using a WWW Form in I would have it as a variable, like for example:

private DataSet dataSet;
WWW request = new WWW("http://somewebaddress.com/myfile.dat");
yield return request;
dataSet = request.data;

How would I load that into the application, as dataSet.Load() only accepts a string to a path?

Thanks

I think that you'll need to write the files to the local file system using System.IO .

Here are some examples - http://www.previewlabs.com/file-io-in-unity3d/

Allright, I got to the point where I can save the files on my mobile, but I have a few questions, as it doesnt work yet.

First off, do I need to save the XML file along with the DAT file?

Then secondly, how would I load the file into the plugin?

I am saving the files as following:
File.WriteAllBytes(Application.persistentDataPath + "/Main.dat", requestDat.bytes);
File.WriteAllBytes(Application.persistentDataPath + "/Main.xml", requestXml.bytes);

Then attempt to find it using:

DataSet.Exists(Application.persistentDataPath + "/Main", DataSet.StorageType.STORAGE_ABSOLUTE);

but that returns false.
I tried with all three storage types, as I am not sure what kind of storage type I am dealing with.

Thanks in advance

Quote:

First off, do I need to save the XML file along with the DAT file?

Yes, both files need to be saved side-by-side.

Quote:

Then attempt to find it using:

DataSet.Exists(Application.persistentDataPath + "/Main", DataSet.StorageType.STORAGE_ABSOLUTE);

but that returns false.

Try adding the ".xml":

DataSet.Exists(Application.persistentDataPath + "/Main.xml", DataSet.StorageType.STORAGE_ABSOLUTE);

- Kim

Yes, that was the solution, thanks a lot!

Maybe it would be handy if that example would be included in the development guide!

That's a good idea.

Hi all

I am loading dataset from server for my ios app.

My present way is that I am downloading the new .dat and .xml for new images everytime.

But I want to do it for only new images. So I need to put a timestamp on the existing dataset and ask only for the dataset of images post that date.

I have to keep images for last 7 days.

So how should I fetch new dataset??

What I felt was

First lets do matching with existing dataset(one which is on device) and then if the matching fails a request will go to server for the dataset which is post that date but are less than 7 days old.

i will download this new dataset.

name it as a new dataset and match with this one.

Is this a good way of saving network time of download.(now user download only those image datasets which required.)

Pls help moderators

Regards()

Hi junkiehead,

This is really an application specific question, as only you know the use case and its frequency.

This is probably the type of use case that the new Cloud REco would support, and it's hard to try and circumvent the existing solution to make it do what you want.

https://ar.qualcomm.at/content/vuforia-web-services

You will probably need to try several solutions and then test out in the field.

N

Morganza you can send me the script for this? I can not make it work..

Hello,

Did someone got this work?

What I got is actually the dataset are loaded, but the not the database

I load the dataset from the persistentDataPath 

or maybe now we can't load datasets from external source anymore?

thanks