sdaiGetInstanceType

Returns the entity based on an instance.

Syntax

C++ 32 bit
C++ 64 bit
C# 32 bit
C# 64 bit
public const string ifcenginedll = @"ifcengine.dll";

[DllImport(ifcenginedll, EntryPoint = "sdaiGetInstanceType")]
public static extern Int32 sdaiGetInstanceType(int_t instance);

Property instance

Size: 32 bit / 4 byte (value)
...

Example (based on pure API calls)

Here you can find code snippets that show how the API call sdaiGetInstanceType can be used.

C++ 32 bit
C++ 64 bit
C# 32 bit
C# 64 bit
using RDF;      //  include at least IFCEngine.cs within your solution

void GetInstanceProperties(Int64 model, Int64 ifcColumnInstance)
{
    Int64 isDefinedByInstances = 0,
          ifcRelDefinesByType_TYPE = RDF.IFCEngine.sdaiGetEntity(model, System.Text.Encoding.UTF8.GetBytes("IFCRELDEFINESBYTYPE")),
          ifcRelDefinesByProperties_TYPE = RDF.IFCEngine.sdaiGetEntity(model, System.Text.Encoding.UTF8.GetBytes("IFCRELDEFINESBYPROPERTIES"));
    RDF.IFCEngine.sdaiGetAttrBN(ifcColumnInstance, System.Text.Encoding.UTF8.GetBytes("IsDefinedBy"), RDF.IFCEngine.sdaiAGGR, out isDefinedByInstances);

    if (isDefinedByInstances != 0)
    {
        Int64 typeCnt = 0,
                isDefinedByInstancesCnt = RDF.IFCEngine.sdaiGetMemberCount(isDefinedByInstances);
        for (Int64 i = 0; i < isDefinedByInstancesCnt; i++) {
            Int64 isDefinedByInstance = 0;
            RDF.IFCEngine.sdaiGetAggrByIndex(isDefinedByInstances, i, RDF.IFCEngine.sdaiINSTANCE, out isDefinedByInstance);

            if  (RDF.IFCEngine.sdaiGetInstanceType(isDefinedByInstance) == ifcRelDefinesByType_TYPE) {
                ...
            } else if  (RDF.IFCEngine.sdaiGetInstanceType(isDefinedByInstance) == ifcRelDefinesByProperties_TYPE) {
                ...
            } else {
                ...
            }
        }
    }
}

void GetColumns(Int64 model)
{
    Int64 ifcColumnInstances = RDF.IFCEngine.sdaiGetEntityExtentBN(model, System.Text.Encoding.UTF8.GetBytes("IFCCOLUMN")),
          noIfcColumnInstances = RDF.IFCEngine.sdaiGetMemberCount(ifcColumnInstances);
    if (noIfcColumnInstances != 0)
    {
        for (Int64 i = 0; i < noIfcColumnInstances; i++)
        {
            Int64 ifcColumnInstance = 0;
            RDF.IFCEngine.sdaiGetAggrByIndex(ifcColumnInstances, i, RDF.IFCEngine.sdaiINSTANCE, out ifcColumnInstance);

            GetInstanceProperties(model, ifcColumnInstance);
        }
    }
}