Replacing one BIM Object with Another Object in the Archicad Project.

KirthikaSrinivasan-L — Fri, 28 Feb 2025 09:54:53 GMT

Hi there! I'm trying to replace one BIM Object (which is already available in the Embedded Library) with another BIM Object using the code below. I'm finding the Lib_Part indices of both objects and setting the libInd of the old object to the new object's libInd (element.object.libInd = replacementLibPart.index;).

I'm facing APIERR_REFUSEDCMD error or APIERR_BADPARS error, when the code reaches ACAPI_Element_Change(). No Matter what I try, I'm unable to fix this. Can you please help me fix this?

Please let me know if my approach has any issues.

Thanks in Advance!.

// Function to find an object by name API_LibPart FindLibPartByName(const char* partName) { API_LibPart libPart; BNZeroMemory(&libPart, sizeof(API_LibPart)); GSErrCode err; Int32 numLibParts; ACAPI_LibraryPart_GetNum(&numLibParts); for (Int32 i = 1; i <= numLibParts; i++) { BNZeroMemory(&libPart, sizeof(API_LibPart)); libPart.index = i; err = ACAPI_LibraryPart_Get(&libPart); char docuname[256]; GS::UniString docName = GS::UniString(libPart.docu_UName); const char* cString = docName.ToCStr().Get(); if (err == NoError && strcmp(cString, partName) == 0) { return libPart; } } libPart.index = 0; // Return invalid index if not found return libPart; } // Function to replace all instances of an old object with a new one GSErrCode BrowserPalette::ReplaceBIMObjects(const char* oldObjectName, const char* newObjectName) { // Get current object's library part API_LibPart oldLibPart; BNZeroMemory(&oldLibPart, sizeof(API_LibPart)); //Adding oldobjectname's libpart oldLibPart = FindLibPartByName(oldObjectName); GS::UniString OldLibpartName(oldLibPart.docu_UName); API_LibPart replacementLibPart; BNZeroMemory(&replacementLibPart, sizeof(API_LibPart)); replacementLibPart = FindLibPartByName(newObjectName); GS::UniString newLibpartName(replacementLibPart.docu_UName); if (ACAPI_LibPart_Get(&oldLibPart) == NoError) { ACAPI_WriteReport("Found Object: %s", true, OldLibpartName); if (ACAPI_LibPart_Get(&replacementLibPart) == NoError) { ACAPI_WriteReport("Replacing %s with %s", true, OldLibpartName.ToCStr().Get(), newLibpartName.ToCStr().Get()); // Update the object's library part reference GS::Array<API_Guid> objectList; ACAPI_Element_GetElemList(API_ObjectID, &objectList); for (const auto& objGuid : objectList) { API_Element element; BNZeroMemory(&element, sizeof(API_Element)); element.header.guid = objGuid; if (ACAPI_Element_Get(&element) == NoError) { if (element.object.libInd == oldLibPart.index) { //ACAPI_WriteReport("Found Element: %s", true, element.object.libInd); element.object.libInd = replacementLibPart.index; // Replace with new object index GSErrCode err = ACAPI_CallUndoableCommand("Change Object", [&]() -> GSErrCode { return ACAPI_Element_Change(&element, nullptr, nullptr, 0, false); }); //GSErrCode err = ACAPI_Element_Change(&element, nullptr, nullptr, 0, true); if (err != NoError) { ACAPI_WriteReport("Error updating object: %d", true, err); } } } } } else { ACAPI_WriteReport("Replacement object %s not found in Embedded Library.", true, newLibpartName.ToCStr().Get()); } } return NoError; }

Re: Replacing one BIM Object with Another Object in the Archicad Project.

Hiromichi Shinkawa — Tue, 04 Mar 2025 03:12:26 GMT

Hi, When you'd change an object, the index(libInd) only seems not enough. I think you need to set the mask ACAPI_ELEMENT_MASK_SET() as first, and pass the new object memo like:
ACAPI_Element_Change (&element, &mask, &memo, APIMemoMask_AddPars, true);
Please check the API Examples, you can find similar code which is using the command above.
HTH.

topic Re: Replacing one BIM Object with Another Object in the Archicad Project. in Archicad C++ API

Replacing one BIM Object with Another Object in the Archicad Project.

Re: Replacing one BIM Object with Another Object in the Archicad Project.