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Eyeshot Conversion Example

Table of Contents

Reads an external CAD file and translates its contents into Eyeshot objects at runtime.

Overview

The Eyeshot Conversion Example shows how to import CAD model and convert its data (ModelData_Model object) into Eyeshot entities using Eyeshot_EntityFactory class.

In this example we create a special Eyeshot WorkUnit for asynchronious read and convert data from external CAD file. Example performs following actions:

  1. Prepare and show the main form with Eyeshot Viewer and Design.
  2. Get the CAD model file name via File Open Dialog on Import button click.
  3. Activate special ReadFileCadEx work unit for asynchronious reading and conversion CAD file data.
  4. Integrate the converted data into Eyeshot document after ReadFileCadEx completion.

Conversion Processing

The main work perform in method Process() of class ReadFileCadEx. This method consist of following steps:

  • Read a CAD file and transfer its data to a ModelData_Model object.
    ModelData_Model aModel = new ModelData_Model();
    ModelData_ModelReader aReader = new ModelData_ModelReader();
    if (!aReader.Read(new Base_UTF16String(theFileName), aModel))
    {
    Console.WriteLine("Failed to open and convert the file");
    return null;
    }
  • Create Eyeshot integration factory Eyeshot_EntityFactory and call Create() method for creation Eyeshot entities.
    myFactory = new Eyeshot_EntityFactory();
    return myFactory.Create(aModel, theMap);
  • Return root entity object and store it in work unit.
    BlockReference aRoot = Process(aFileName, myMask);
    if (aRoot != null)
    {
    Entities = new Entity[] { aRoot };
    }
  • After work unit is completed main frame invokes AddTo() method to transfer data into Eyeshot document (in design1_WorkCompleted event handler).
    ReadFileAsync aReadAsync = theEventArgs.WorkUnit as ReadFileAsync;
    aReadAsync.AddTo(design1);
  • The transfer data into Eyeshot perfomed using Eyeshot_EntityFactory.AddTo() and adding the root Entity to Eyeshot document Entities property.
    public override void AddTo(DesignDocument theDoc, RegenOptions theRegenOptions = null)
    {
    if (myFactory != null && theDoc != null && Entities.Length > 0)
    {
    myFactory.AddTo(theDoc);
    theDoc.Entities.AddRange(Entities);
    }
    }
  • Finally, the last step of the main form process is loading new textures of the converted materials.
    foreach (Material aMaterial in design1.Materials)
    {
    aMaterial.LoadTexture(design1.RenderContext);
    }

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