Hoops_Exchange/exchange/exchangesource/IncrementalLoad/IncrementalLoad.cpp

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/**
\file IncrementalLoad.cpp

Incremental loading technique allows a more fine-grained approach for loading files,
which is especially beneficial when dealing with huge files
(e.g. I want to load only item 26 and 72, not the whole file in one shot).

The only input is the file path, optionnal inputs are is the reading mode of the file and unload.

***********************************************************************************************************************/

#define _CRT_SECURE_NO_DEPRECATE 1
#define INITIALIZE_A3D_API
#include <A3DSDKIncludes.h>

#include "../common.hpp"

//######################################################################################################################
A3DStatus stLoadRequiredProductOccurrence(A3DAsmProductOccurrence* pOcc,
										  A3DAsmProductOccurrence* pRoot,
										  A3DSDKHOOPSExchangeLoader& sHoopsExchangeLoader,
										  A3DImport& sImport,
										  A3DEReadGeomTessMode eMode,
										  bool bWithUnload)
{
	A3DStatus iRet = A3D_SUCCESS;

	if (pRoot == NULL)
	{
		// trying to incremental load a part...
		return A3D_ERROR;
	}

	sImport.m_sLoadData.m_sGeneral.m_eReadGeomTessMode = eMode;
	sImport.m_sLoadData.m_sIncremental.m_bLoadStructureOnly = false;
	sImport.m_sLoadData.m_sIncremental.m_ppProductOccurrences = &pOcc;
	sImport.m_sLoadData.m_sIncremental.m_pRootProductOccurrence = pRoot;
	sImport.m_sLoadData.m_sIncremental.m_uiProductOccurrencesSize = 1;

	CHECK_RET(sHoopsExchangeLoader.Import(sImport));

	if (bWithUnload)
	{
		CHECK_RET(A3DAsmModelFileUnloadParts(sHoopsExchangeLoader.m_psModelFile, 1, &pOcc));
	}

	return iRet;
}

//######################################################################################################################
static A3DStatus stIncrementalLoadFromProductOccurrences(A3DAsmProductOccurrence* pProductOccurrence,
														 A3DAsmProductOccurrence* pRoot,
														 A3DSDKHOOPSExchangeLoader& sHoopsExchangeLoader,
														 A3DImport& sImport,
														 A3DEReadGeomTessMode eMode,
														 bool bWithUnload)
{
	// get the data
	A3DAsmProductOccurrenceData sProductOccurrenceData;
	A3D_INITIALIZE_DATA(A3DAsmProductOccurrenceData, sProductOccurrenceData);
	CHECK_RET(A3DAsmProductOccurrenceGet(pProductOccurrence, &sProductOccurrenceData));

	// If the PO is a leaf, load the PO
	if (sProductOccurrenceData.m_uiPOccurrencesSize == 0)
	{
		stLoadRequiredProductOccurrence(pProductOccurrence, pRoot, sHoopsExchangeLoader, sImport, eMode, bWithUnload);
	}
	// If not, find leaves recursively
	else
	{
		for (A3DUns32 i = 0; i < sProductOccurrenceData.m_uiPOccurrencesSize; ++i)
		{
			stIncrementalLoadFromProductOccurrences(sProductOccurrenceData.m_ppPOccurrences[i], pProductOccurrence, sHoopsExchangeLoader, sImport, eMode, bWithUnload);
		}
	}
	A3DAsmProductOccurrenceGet(nullptr, &sProductOccurrenceData);
	return A3D_SUCCESS;
}

static MY_CHAR acSrcFileName[_MAX_PATH * 2];
static MY_CHAR acDstFileName[_MAX_PATH * 2];
static MY_CHAR acLogFileName[_MAX_PATH * 2];

//######################################################################################################################
// Main function
#ifdef _MSC_VER
int wmain(A3DInt32 iArgc, A3DUniChar** ppcArgv)
#else
int main(A3DInt32 iArgc, A3DUTF8Char** ppcArgv)
#endif
{
	//
	// ### COMMAND LINE ARGUMENTS
	//

	if (iArgc > 5)
	{
		MY_PRINTF2("Usage:\n %s [input CAD file] [reading mode: 0=geom only, 1=geom+tess, 2=tess only] [with unload] [output LOG file]\n", ppcArgv[0]);
		MY_PRINTF("  Default output LOG file is [input CAD file]_Log.txt\n\n");
		return A3D_ERROR;
	}

	A3DEReadGeomTessMode eMode = kA3DReadTessOnly;
	bool bWithUnload = true;

	if (iArgc > 1) MY_STRCPY(acSrcFileName, ppcArgv[1]);
	else           MY_STRCPY(acSrcFileName, DEFAULT_INPUT_CAD);
	if (iArgc > 2) eMode = (A3DEReadGeomTessMode)MY_ATOI(ppcArgv[2]);
	else           eMode = kA3DReadTessOnly;
	if (iArgc > 3) bWithUnload = MY_ATOI(ppcArgv[3]) == 1;
	else           bWithUnload = true;
	if (iArgc > 4) MY_STRCPY(acLogFileName, ppcArgv[4]);
	else           MY_SPRINTF(acLogFileName, "%s_Log.txt", acDstFileName);
	GetLogFile(acLogFileName); // Initialize log file

	//
	// ### INITIALIZE HOOPS EXCHANGE
	//

	A3DSDKHOOPSExchangeLoader sHoopsExchangeLoader(_T(HOOPS_BINARY_DIRECTORY));
	CHECK_RET(sHoopsExchangeLoader.m_eSDKStatus);

	// Initialize call backs
	CHECK_RET(A3DDllSetCallbacksMemory(CheckMalloc, CheckFree));
	CHECK_RET(A3DDllSetCallbacksReport(PrintLogMessage, PrintLogWarning, PrintLogError));

	//
	// ### PROCESS SAMPLE CODE
	//

	A3DImport sImport(acSrcFileName); // see A3DSDKInternalConvert.hxx for import and export detailed parameters

									  //loading of the CAD file in incremental mode
	sImport.m_sLoadData.m_sIncremental.m_bLoadStructureOnly = true;
	A3DStatus iRet = sHoopsExchangeLoader.Import(sImport);
	if (iRet != A3D_SUCCESS && iRet != A3D_LOAD_MISSING_COMPONENTS)
		CHECK_RET(iRet);

	// Get Model File
	A3DAsmModelFileData sModelFileData;
	A3D_INITIALIZE_DATA(A3DAsmModelFileData, sModelFileData);
	CHECK_RET(A3DAsmModelFileGet(sHoopsExchangeLoader.m_psModelFile, &sModelFileData));

	// iterate on each root PO
	for (A3DUns32 i = 0; i < sModelFileData.m_uiPOccurrencesSize; ++i)
	{
		stIncrementalLoadFromProductOccurrences(sModelFileData.m_ppPOccurrences[i], NULL, sHoopsExchangeLoader, sImport, eMode, bWithUnload);
	}
	A3DAsmModelFileGet(nullptr, &sModelFileData);
	//
	// ### TERMINATE HOOPS EXCHANGE
	//

	// Check memory allocations
	return (int)ListLeaks();
}