添加项目文件。

MstnAPIAssist/Native/CElementHelper.cpp

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+#include "../pch.h"
+#include "CElementHelper.h"
+#include <Mstn/MdlApi/MdlApi.h>
+#include <DgnPlatform/DgnPlatformApi.h>
+#include <Mstn/ISessionMgr.h>
+#include <PSolid/PSolidCoreAPI.h>
+#include <cassert>
+
+USING_NAMESPACE_BENTLEY_DGNPLATFORM
+USING_NAMESPACE_BENTLEY_MSTNPLATFORM
+USING_NAMESPACE_BENTLEY_MSTNPLATFORM_ELEMENT
+
+void CElementHelper::CreateLineElement(DPoint3dCP pStartPoint, DPoint3dCP pEndPoint)
+{
+    DgnModelRefP pActiveModel = ISessionMgr::GetActiveDgnModelRefP();
+    DSegment3d segment = DSegment3d::From(*pStartPoint, *pEndPoint);
+    EditElementHandle eeh;
+    LineHandler::CreateLineElement(eeh, nullptr, segment, pActiveModel->Is3d(), *pActiveModel);
+    eeh.AddToModel();
+}
+
+void CElementHelper::CreateLineStringElement(DPoint3dCP pPoints, int pointCount)
+{
+    assert(pPoints != nullptr && pointCount >= 2);
+    DgnModelRefP pActiveModel = ISessionMgr::GetActiveDgnModelRefP();
+    EditElementHandle eeh;
+    LineStringHandler::CreateLineStringElement(eeh, nullptr, pPoints, pointCount, pActiveModel->Is3d(), *pActiveModel);
+    eeh.AddToModel();
+}
+
+void CElementHelper::CreateCurveElement(CurveVectorCP pCurveVector)
+{
+    assert(pCurveVector != nullptr);
+    DgnModelRefP pActiveModel = ISessionMgr::GetActiveDgnModelRefP();
+    EditElementHandle eeh;
+    DraftingElementSchema::ToElement(eeh, *pCurveVector, nullptr, pActiveModel->Is3d(), *pActiveModel);
+    eeh.AddToModel();
+}
+
+void CElementHelper::BodyFromLoft(CurveVectorPtr* pCurveVectorPtr, int profileCount, DgnModelRefP pDgnModelRef)
+{
+    assert(pCurveVectorPtr != nullptr && profileCount >= 2);
+    ISolidKernelEntityPtr solidPtr;
+    BentleyStatus status = SolidUtil::Create::BodyFromLoft(solidPtr, pCurveVectorPtr, profileCount, nullptr, 0, *pDgnModelRef);
+    assert(status == SUCCESS && solidPtr.IsValid());
+
+    EditElementHandle eeh;
+    DraftingElementSchema::ToElement(eeh, *solidPtr, nullptr, *pDgnModelRef);
+    eeh.AddToModel();
+}
+
+void CElementHelper::ShowMessage(WCharCP message)
+{
+    mdlDialog_dmsgsPrint(message);
+}

MstnAPIAssist/Native/CElementHelper.h

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+#pragma once
+#include <Mstn/MdlApi/MdlApi.h>
+
+class CElementHelper
+{
+public:
+	void CreateLineElement(DPoint3dCP pStartPoint, DPoint3dCP pEndPoint);
+	void CreateLineStringElement(DPoint3dCP pPoints, int pointCount);
+	void CreateCurveElement(CurveVectorCP pCurveVector);
+	void BodyFromLoft(CurveVectorPtr* pCurveVectorPtr, int profileCount, DgnModelRefP pDgnModelRef);
+	void ShowMessage(WCharCP message);
+};
+