This article describes the development of a basic application demonstrating how to access alignments in civil drawings and change their properties.
This document describes the basic workflow of creating your first application with ODA Civil SDK. The application is developed for the Win32 platform with Microsoft® Visual Studio® 2015 (Visual C++ 14) using the following archives:
1. Start Visual Studio and create a new solution or open an existing one.
2. Add a new project to the solution. Optionally set your project as the startup project.
3. Add the necessary include directives, at least:
OdaCommon.h
DbDatabase.h
RxDynamicModule.h
ExSystemServices.h
ExHostAppServices.h
AECBase.h
AECCVBase.h
AECCLand.h
4. For convenience, create a custom services class.
/************************************************************************/
/* Define a Custom Services class. */
/* */
/* Combines the platform dependent functionality of */
/* ExSystemServices and ExHostAppServices */
/************************************************************************/
class MyServices : public ExSystemServices, public ExHostAppServices
{
protected:
ODRX_USING_HEAP_OPERATORS(ExSystemServices);
};
Then in the main()
function:
5. Initialize system services using the odInitialize
function.
OdStaticRxObject svcs;
odInitialize(&svcs);
6. Load the necessary modules using the
::odrxDynamicLinker()->loadApp
function.
::odrxDynamicLinker()->loadApp( OD_T( "AeccLand" ) );
::odrxDynamicLinker()->loadApp( OD_T( "AeccvBase" ) );
::odrxDynamicLinker()->loadApp( OD_T( "AecBase" ) );
7. Initialize databases using the
OdDbDatabasePtr ExHostAppServices::readFile
function.
OdDbDatabasePtr pDb;
pDb = svcs.readFile(inFile.c_str());
AECCVBaseDatabase( pDb ).Init();
AECCLandDatabase cBase( pDb );
cBase.Init();
8. Now you can access civil objects and their methods. For example, to print names and descriptions for alignments and change their names:
OdDbObjectIdArray alignmentIds = cBase.GetAlignmentIds();
for ( OdUInt32 i = 0; i < alignmentIds.size(); ++i )
{
OdDbObjectId alignmentId = alignmentIds[ i ];
AECCDbAlignmentPtr pAlignment = AECCDbAlignment::cast( alignmentId.openObject( kForWrite ) );
std::cout << "Alignment# " << i << "Name: " << pAlignment->GetName() << ", Description: " << pAlignment->GetDescription() << std::endl;
pAlignment->SetName( OD_T( "New Name" ) );
}
Then you can save the updated file:
OdRxObjectImpl<OdWrFileBuf> fb;
fb.open(dwgOutFile.c_str());
pDb->writeFile(&fb, OdDb::kDwg, OdDb::kDHL_CURRENT, false );
std::cout<<"File saved as "<<dwgOutFile<<std::endl;
9. And finally, you must call the odUninitialize
function to
correctly unload modules.
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