CAD二次开发学习笔记六(用类来组织函数)

新建ObjectARX项目CreateEnts

打开类视图，右击->新建类

这个类用来保存创建实体的函数。

包含#include "StdAfx.h"

代码如下：

#pragma once

#include "StdAfx.h"

class CCreateEnt
{
public:
    CCreateEnt(void);
    ~CCreateEnt(void);
    static AcDbObjectId CreateLine(AcGePoint3d ptStart,AcGePoint3d ptEnd);
    static AcDbObjectId PostToModelSpace(AcDbEntity* pEnt);
    static AcDbObjectId CreateCircle(AcGePoint3d ptCenter,AcGeVector3d vec,double radius);
};

 

 

#include "StdAfx.h"
#include "CreateEnt.h"

CCreateEnt::CCreateEnt(void)
{
}

CCreateEnt::~CCreateEnt(void)
{
}

//将实体添加到图形数据库的模型空间
AcDbObjectId CCreateEnt::PostToModelSpace(AcDbEntity* pEnt)
{
    AcDbBlockTable *pBlockTable;
    acdbHostApplicationServices()->workingDatabase()->getBlockTable(pBlockTable,AcDb::kForRead);

    AcDbBlockTableRecord *pBlockTableRecord;
    pBlockTable->getAt(ACDB_MODEL_SPACE,pBlockTableRecord,AcDb::kForWrite);

    AcDbObjectId entId;
    pBlockTableRecord->appendAcDbEntity(entId,pEnt);
    pBlockTable->close();
    pBlockTableRecord->close();
    pEnt->close();

    return entId;
}
//创建直线
AcDbObjectId CCreateEnt::CreateLine(AcGePoint3d ptStart,AcGePoint3d ptEnd)
{
    AcDbLine *pLine = new AcDbLine(ptStart,ptEnd);
    //将实体添加到图形数据库
    AcDbObjectId lineId;
    lineId = CCreateEnt::PostToModelSpace(pLine);

    return lineId;
}

//创建圆
AcDbObjectId CCreateEnt::CreateCircle(AcGePoint3d ptCenter,AcGeVector3d vec,double radius)
{
    AcDbCircle *pCircle = new AcDbCircle(ptCenter,vec,radius);
    //将实体添加到图形数据库
    AcDbObjectId circleId;
    circleId = CCreateEnt::PostToModelSpace(pCircle);

    return circleId;
}

 

同样添加一个ModifyEnt类用来修改实体。

#pragma once

#include "StdAfx.h"

class CModifyEnt
{
public:
    CModifyEnt(void);
    ~CModifyEnt(void);
    static Acad::ErrorStatus ChangeColor(AcDbObjectId entId,Adesk::UInt16 colorIndex);
    static Acad::ErrorStatus ChangeLayer(AcDbObjectId entId,CString strLayerName);
};

 

 

#include "StdAfx.h"
#include "ModifyEnt.h"

CModifyEnt::CModifyEnt(void)
{
}

CModifyEnt::~CModifyEnt(void)
{
}

//修改实体颜色
Acad::ErrorStatus CModifyEnt::ChangeColor(AcDbObjectId entId,Adesk::UInt16 colorIndex)
{
    AcDbEntity *pEntity;
    //打开图形数据库中的对象
    acdbOpenObject(pEntity,entId,AcDb::kForWrite);
    //修改实体的颜色
    pEntity->setColorIndex(colorIndex);
    //用完之后，及时关闭
    pEntity->close();

    return Acad::eOk;
}
//改变实体所在层
Acad::ErrorStatus CModifyEnt::ChangeLayer(AcDbObjectId entId,CString strLayerName)
{
    AcDbEntity *pEntity;
    //打开图形数据库中的对象
    acdbOpenObject(pEntity,entId,AcDb::kForWrite);
    //修改实体的图层
    pEntity->setLayer(strLayerName);
    //用完之后，及时关闭
    pEntity->close();

    return Acad::eOk;
}

 

 在acrxEntryPoint.cpp中包含CreateEnt.h和ModifyEnt.h

// (C) Copyright 2002-2005 by Autodesk, Inc. 
//
// Permission to use, copy, modify, and distribute this software in
// object code form for any purpose and without fee is hereby granted, 
// provided that the above copyright notice appears in all copies and 
// that both that copyright notice and the limited warranty and
// restricted rights notice below appear in all supporting 
// documentation.
//
// AUTODESK PROVIDES THIS PROGRAM "AS IS" AND WITH ALL FAULTS. 
// AUTODESK SPECIFICALLY DISCLAIMS ANY IMPLIED WARRANTY OF
// MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE.  AUTODESK, INC. 
// DOES NOT WARRANT THAT THE OPERATION OF THE PROGRAM WILL BE
// UNINTERRUPTED OR ERROR FREE.
//
// Use, duplication, or disclosure by the U.S. Government is subject to 
// restrictions set forth in FAR 52.227-19 (Commercial Computer
// Software - Restricted Rights) and DFAR 252.227-7013(c)(1)(ii)
// (Rights in Technical Data and Comp9uter Software), as applicable.
//

//-----------------------------------------------------------------------------
//----- acrxEntryPoint.h
//-----------------------------------------------------------------------------
#include "StdAfx.h"
#include "resource.h"

#include "CreateEnt.h"
#include "ModifyEnt.h"

//-----------------------------------------------------------------------------
#define szRDS _RXST("")

//-----------------------------------------------------------------------------
//----- ObjectARX EntryPoint
class CCreateEntsApp : public AcRxArxApp {

public:
    CCreateEntsApp () : AcRxArxApp () {}

    virtual AcRx::AppRetCode On_kInitAppMsg (void *pkt) {
        // TODO: Load dependencies here

        // You *must* call On_kInitAppMsg here
        AcRx::AppRetCode retCode =AcRxArxApp::On_kInitAppMsg (pkt) ;
        
        // TODO: Add your initialization code here

        return (retCode) ;
    }

    virtual AcRx::AppRetCode On_kUnloadAppMsg (void *pkt) {
        // TODO: Add your code here

        // You *must* call On_kUnloadAppMsg here
        AcRx::AppRetCode retCode =AcRxArxApp::On_kUnloadAppMsg (pkt) ;

        // TODO: Unload dependencies here

        return (retCode) ;
    }

    virtual void RegisterServerComponents () {
    }


    // - CreateEnts.ChangeColor command (do not rename)
    static void CreateEntsChangeColor(void)
    {
        // Add your code for command CreateEnts.ChangeColor here
        //创建直线
        AcGePoint3d ptStart(0,0,0);
        AcGePoint3d ptEnd(100,100,0);
        AcDbObjectId lineId;
        lineId = CCreateEnt::CreateLine(ptStart,ptEnd);
        //修改直线颜色
        Adesk::UInt16 nColor = 1;
        CModifyEnt::ChangeColor(lineId,nColor);
    }
} ;

//-----------------------------------------------------------------------------
IMPLEMENT_ARX_ENTRYPOINT(CCreateEntsApp)

ACED_ARXCOMMAND_ENTRY_AUTO(CCreateEntsApp, CreateEnts, ChangeColor, MyCommand1, ACRX_CMD_TRANSPARENT, NULL)