Is it possible to create shattered model by using libsc?

[820110017]

Hi,
I’m creating model using libSC, I wonder if it is possible to generate XML file and shattered sub SCS files without using libconverter ?

The files created should be the same as :

How to create shattered assembly parts & XML from monolithic assembly

Introduction Although shattered assembly can be created from some native CAD formats whose sub-components reside in individual files such as CATIA V5, Creo - Pro/E, NX or SolidWorks, it is not possible to create from a monolithic assembly file such as IFC, Revit or 3DXML. This article introduces a sample which creates shattered assembly from a monolithic assembly file using HOOPS Exchange and LibConverter of HOOPS Communicator. Created shattered parts and master XML file can be loaded using HOO…

and can be loaded by communicator web viewer correctly.

Thanks.

[tino]

Hello @820110017,

Please see this post in the forum:

Authoring Shattered Models in HOOPS Communicator (libsc)

One of HOOPS Communicator’s strongest capabilities is its ability to stream, render, and quickly interact with massive models or data sets. These models may be comprised of hundreds of millions of triangles, hundreds of assembly nodes, attribute rich parts, and much more that extends beyond vertices. HOOPS Communicator’s WebViewer and Stream Cache streaming server intelligently organize and manage this data to ensure an unbeatable user experience with near-immediate interaction with these very…

Thanks,
Tino

[820110017]

Hi,
I have seen this post before your reply.

It is different from my request. I want to write or create .XML and .SCS files by libSC, not read.

Thanks.

[tino]

You should be able to write to Stream Cache as the article talks about.

With respect to generating an XML file, please refer to the libsc function SerializeToXML.

[820110017]

Hi,
I tried to combine two models according to this post :How-To: Use BuildMasterAssemblyModel function
It returned true after calling “BuildMasterAssemblyModel”.
But there seems something wrong in console, and the result data seems empty.
Here’s my code, only change the cache_path.

int
CombineSample(const std::string& model_path)
{
    std::string cache_path = "C:\\scztest";
    std::string model_name = "combine_microengine_sample";

    ApplicationLogger logger;
    try
    {
        // Open the cache
        SC::Store::Database::SetLicense(HOOPS_LICENSE);
        SC::Store::Cache cache = SC::Store::Database::Open(logger);

        SC::Store::AssemblyTree assembly_tree(logger);
        uint32_t root_id = 0;
        assembly_tree.CreateAssemblyTreeRoot(root_id);
        assembly_tree.SetNodeName(root_id, "assemblytree_sample");
        uint32_t child_node = 0;
        assembly_tree.CreateChild(root_id, child_node);
        assembly_tree.SetNodeName(child_node, "first");
        bool res = assembly_tree.SetExternalModel(child_node, "microengine1");

        float matrix_data[] = {
            1.0f, 0.0f, 0.0f,
            0.0f, 1.0f, 0.0f,
            0.0f, 0.0f, 1.0f,
            0.0f, 100.0f, 0.0f,
        };
        SC::Store::Matrix3d * matrix = (SC::Store::Matrix3d *)matrix_data;

        assembly_tree.CreateChild(root_id, child_node);
        assembly_tree.SetNodeName(child_node, "second");
        res = assembly_tree.SetExternalModel(child_node, "microengine2");
        assembly_tree.SetNodeLocalTransform(child_node, *matrix);

        std::string modelPath = cache_path + "\\" + model_name;
        if (cache.Exists((cache_path + "\\" + model_name).c_str()))
        {
            printf("Model already exists.\n");
            return 1;
        }
        res = assembly_tree.BuildMasterAssemblyModel(cache_path.c_str(), modelPath.c_str(), cache_path.c_str(), false);
    }
    catch (std::exception const & e)
    {
        std::string message("Exception: ");
        message.append(e.what());
        message.append("\n");
        logger.Message(message.c_str());
        return 1;
    }

    return 0;
}

What’s wrong with my code?
Thanks !

[820110017]

scz.zip (1.3 MB)

[tino]

Hello @820110017,

There isn’t anything wrong with your code that I can find.

When building the master assembly model, there is not actually a model (geometry that has a valid bounding box) in the resulting SC file as it contains only the assembly information. Thus, the message PrepareStream seems invalid - possible empty Model? is appropriate in this case.

So provided that you have set your directory correctly (C:\\scztest contains microengine1.scz and microengine2.scz), I would expect your code to work. As a quick test, here is my result:

Thanks,
Tino