C/C++教程
CAD ObjectARX二次开发之自定义实体
本文主要是介绍CAD ObjectARX二次开发之自定义实体，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！
一、创建自定义实体
1、创建空白解决方案。
2、添加自定义实体工程（自定义三角行实体）
3、添加类，选择Custom Object Wizard，定义实体名，选择继承AcDbEntity实体基类
4、设置捕捉模式、数据读写格式规则
5、工程目录
6、编写实体在DWG、DXF文件读写
头文件中添加成员变量存储三角形顶点，添加构造函数
源文件中实现构造函数，
源文件中dwgOutFields、dwgInFields、dxfOutFields、dxfInFields函数进行变量存储和读取
源文件中subWorldDraw添加图形绘制
ArxCusEntity.h头文件
// (C) Copyright 2002-2007 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 Computer Software), as applicable.
//
//-----------------------------------------------------------------------------
//----- ArxCusEntity.h : Declaration of the ArxCusEntity
//-----------------------------------------------------------------------------
#pragma once
#ifdef DEMO_CUSTOMENTITY_MODULE
#define DLLIMPEXP __declspec(dllexport)
#else
//----- Note: we don't use __declspec(dllimport) here, because of the
//----- "local vtable" problem with msvc. If you use __declspec(dllimport),
//----- then, when a client dll does a new on the class, the object's
//----- vtable pointer points to a vtable allocated in that client
//----- dll. If the client dll then passes the object to another dll,
//----- and the client dll is then unloaded, the vtable becomes invalid
//----- and any virtual calls on the object will access invalid memory.
//-----
//----- By not using __declspec(dllimport), we guarantee that the
//----- vtable is allocated in the server dll during the ctor and the
//----- client dll does not overwrite the vtable pointer after calling
//----- the ctor. And, since we expect the server dll to remain in
//----- memory indefinitely, there is no problem with vtables unexpectedly
//----- going away.
#define DLLIMPEXP
#endif
//-----------------------------------------------------------------------------
#include "dbmain.h"
//-----------------------------------------------------------------------------
class DLLIMPEXP ArxCusEntity : public AcDbEntity {
public:
ACRX_DECLARE_MEMBERS(ArxCusEntity) ;
protected:
static Adesk::UInt32 kCurrentVersionNumber ;
public:
ArxCusEntity () ;
//重载构造函数
ArxCusEntity (AcGePoint3d P1,AcGePoint3d P2,AcGePoint3d P3) ;
virtual ~ArxCusEntity () ;
//----- AcDbObject protocols
//- Dwg Filing protocol
virtual Acad::ErrorStatus dwgOutFields (AcDbDwgFiler *pFiler) const ;
virtual Acad::ErrorStatus dwgInFields (AcDbDwgFiler *pFiler) ;
//- Dxf Filing protocol
virtual Acad::ErrorStatus dxfOutFields (AcDbDxfFiler *pFiler) const ;
virtual Acad::ErrorStatus dxfInFields (AcDbDxfFiler *pFiler) ;
//----- AcDbEntity protocols
//- Graphics protocol
protected:
virtual Adesk::Boolean subWorldDraw (AcGiWorldDraw *mode) ;
virtual Adesk::UInt32 subSetAttributes (AcGiDrawableTraits *traits) ;
//- Osnap points protocol
public:
virtual Acad::ErrorStatus subGetOsnapPoints (
AcDb::OsnapMode osnapMode,
int gsSelectionMark,
const AcGePoint3d &pickPoint,
const AcGePoint3d &lastPoint,
const AcGeMatrix3d &viewXform,
AcGePoint3dArray &snapPoints,
AcDbIntArray &geomIds) const ;
virtual Acad::ErrorStatus subGetOsnapPoints (
AcDb::OsnapMode osnapMode,
int gsSelectionMark,
const AcGePoint3d &pickPoint,
const AcGePoint3d &lastPoint,
const AcGeMatrix3d &viewXform,
AcGePoint3dArray &snapPoints,
AcDbIntArray &geomIds,
const AcGeMatrix3d &insertionMat) const ;
//- Grip points protocol
virtual Acad::ErrorStatus subGetGripPoints (AcGePoint3dArray &gripPoints, AcDbIntArray &osnapModes, AcDbIntArray &geomIds) const ;
virtual Acad::ErrorStatus subMoveGripPointsAt (const AcDbIntArray &indices, const AcGeVector3d &offset) ;
virtual Acad::ErrorStatus subGetGripPoints (
AcDbGripDataPtrArray &grips, const double curViewUnitSize, const int gripSize,
const AcGeVector3d &curViewDir, const int bitflags) const ;
virtual Acad::ErrorStatus subMoveGripPointsAt (const AcDbVoidPtrArray &gripAppData, const AcGeVector3d &offset, const int bitflags) ;
private:
//定义数组，存储三角形三个顶点
AcGePoint3d m_verts[3];
} ;
#ifdef DEMO_CUSTOMENTITY_MODULE
ACDB_REGISTER_OBJECT_ENTRY_AUTO(ArxCusEntity)
#endif
ArxCusEntity.cpp
// (C) Copyright 2002-2007 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 Computer Software), as applicable.
//
//-----------------------------------------------------------------------------
//----- ArxCusEntity.cpp : Implementation of ArxCusEntity
//-----------------------------------------------------------------------------
#include "StdAfx.h"
#include "ArxCusEntity.h"
//-----------------------------------------------------------------------------
Adesk::UInt32 ArxCusEntity::kCurrentVersionNumber =1 ;
//-----------------------------------------------------------------------------
ACRX_DXF_DEFINE_MEMBERS (
ArxCusEntity, AcDbEntity,
AcDb::kDHL_CURRENT, AcDb::kMReleaseCurrent,
AcDbProxyEntity::kNoOperation, ARXCUSENTITY,
ARXDEMO_CUSTOMENTITYAPP
|Product Desc: A description for your object
|Company: Your company name
|WEB Address: Your company WEB site address
)
//-----------------------------------------------------------------------------
ArxCusEntity::ArxCusEntity () : AcDbEntity () {
}
ArxCusEntity::ArxCusEntity( AcGePoint3d P1,AcGePoint3d P2,AcGePoint3d P3 )
{
m_verts[0] = P1;
m_verts[1] = P2;
m_verts[2] = P3;
}
ArxCusEntity::~ArxCusEntity () {
}
//-----------------------------------------------------------------------------
//----- AcDbObject protocols
//- Dwg Filing protocol
Acad::ErrorStatus ArxCusEntity::dwgOutFields (AcDbDwgFiler *pFiler) const {
assertReadEnabled () ;
//----- Save parent class information first.
Acad::ErrorStatus es =AcDbEntity::dwgOutFields (pFiler) ;
if ( es != Acad::eOk )
return (es) ;
//----- Object version number needs to be saved first
if ( (es =pFiler->writeUInt32 (ArxCusEntity::kCurrentVersionNumber)) != Acad::eOk )
return (es) ;
//----- Output params
//.....写入成员变量数据
for(int i=0; i< 3;i++){
pFiler->writeItem(m_verts[i]);
}
return (pFiler->filerStatus ()) ;
}
Acad::ErrorStatus ArxCusEntity::dwgInFields (AcDbDwgFiler *pFiler) {
assertWriteEnabled () ;
//----- Read parent class information first.
Acad::ErrorStatus es =AcDbEntity::dwgInFields (pFiler) ;
if ( es != Acad::eOk )
return (es) ;
//----- Object version number needs to be read first
Adesk::UInt32 version =0 ;
if ( (es =pFiler->readUInt32 (&version)) != Acad::eOk )
return (es) ;
if ( version > ArxCusEntity::kCurrentVersionNumber )
return (Acad::eMakeMeProxy) ;
//- Uncomment the 2 following lines if your current object implementation cannot
//- support previous version of that object.
//if ( version < ArxCusEntity::kCurrentVersionNumber )
// return (Acad::eMakeMeProxy) ;
//----- Read params
//.....读取成员变量数值
for (int i=0; i<3; i++)
{
pFiler->readItem(&m_verts[i]);
}
return (pFiler->filerStatus ()) ;
}
//- Dxf Filing protocol
Acad::ErrorStatus ArxCusEntity::dxfOutFields (AcDbDxfFiler *pFiler) const {
assertReadEnabled () ;
//----- Save parent class information first.
Acad::ErrorStatus es =AcDbEntity::dxfOutFields (pFiler) ;
if ( es != Acad::eOk )
return (es) ;
es =pFiler->writeItem (AcDb::kDxfSubclass, _RXST("ArxCusEntity")) ;
if ( es != Acad::eOk )
return (es) ;
//----- Object version number needs to be saved first
if ( (es =pFiler->writeUInt32 (kDxfInt32, ArxCusEntity::kCurrentVersionNumber)) != Acad::eOk )
return (es) ;
//----- Output params
return (pFiler->filerStatus ()) ;
}
Acad::ErrorStatus ArxCusEntity::dxfInFields (AcDbDxfFiler *pFiler) {
assertWriteEnabled () ;
//----- Read parent class information first.
Acad::ErrorStatus es =AcDbEntity::dxfInFields (pFiler) ;
if ( es != Acad::eOk || !pFiler->atSubclassData (_RXST("ArxCusEntity")) )
return (pFiler->filerStatus ()) ;
//----- Object version number needs to be read first
struct resbuf rb ;
pFiler->readItem (&rb) ;
if ( rb.restype != AcDb::kDxfInt32 ) {
pFiler->pushBackItem () ;
pFiler->setError (Acad::eInvalidDxfCode, _RXST("\nError: expected group code %d (version #)"), AcDb::kDxfInt32) ;
return (pFiler->filerStatus ()) ;
}
Adesk::UInt32 version =(Adesk::UInt32)rb.resval.rlong ;
if ( version > ArxCusEntity::kCurrentVersionNumber )
return (Acad::eMakeMeProxy) ;
//- Uncomment the 2 following lines if your current object implementation cannot
//- support previous version of that object.
//if ( version < ArxCusEntity::kCurrentVersionNumber )
// return (Acad::eMakeMeProxy) ;
//----- Read params in non order dependant manner
while ( es == Acad::eOk && (es =pFiler->readResBuf (&rb)) == Acad::eOk ) {
switch ( rb.restype ) {
//----- Read params by looking at their DXF code (example below)
//case AcDb::kDxfXCoord:
// if ( version == 1 )
// cen3d =asPnt3d (rb.resval.rpoint) ;
// else
// cen2d =asPnt2d (rb.resval.rpoint) ;
// break ;
default:
//----- An unrecognized group. Push it back so that the subclass can read it again.
pFiler->pushBackItem () ;
es =Acad::eEndOfFile ;
break ;
}
}
//----- At this point the es variable must contain eEndOfFile
//----- - either from readResBuf() or from pushback. If not,
//----- it indicates that an error happened and we should
//----- return immediately.
if ( es != Acad::eEndOfFile )
return (Acad::eInvalidResBuf) ;
return (pFiler->filerStatus ()) ;
}
//-----------------------------------------------------------------------------
//----- AcDbEntity protocols
Adesk::Boolean ArxCusEntity::subWorldDraw (AcGiWorldDraw *mode) {
assertReadEnabled () ;
//绘制图形
for (int i =0; i < 3 ;i++)
{
int nextIndex = i +1;
if(i ==2)
{
nextIndex = 0;
}
AcGePoint3d points[2];
points[0] = m_verts[i];
points[1] = m_verts[nextIndex];
mode->geometry().polyline(2,points);
}
return (AcDbEntity::subWorldDraw (mode)) ;
}
Adesk::UInt32 ArxCusEntity::subSetAttributes (AcGiDrawableTraits *traits) {
assertReadEnabled () ;
return (AcDbEntity::subSetAttributes (traits)) ;
}
//- Osnap points protocol
Acad::ErrorStatus ArxCusEntity::subGetOsnapPoints (
AcDb::OsnapMode osnapMode,
int gsSelectionMark,
const AcGePoint3d &pickPoint,
const AcGePoint3d &lastPoint,
const AcGeMatrix3d &viewXform,
AcGePoint3dArray &snapPoints,
AcDbIntArray &geomIds) const
{
assertReadEnabled () ;
return (AcDbEntity::subGetOsnapPoints (osnapMode, gsSelectionMark, pickPoint, lastPoint, viewXform, snapPoints, geomIds)) ;
}
Acad::ErrorStatus ArxCusEntity::subGetOsnapPoints (
AcDb::OsnapMode osnapMode,
int gsSelectionMark,
const AcGePoint3d &pickPoint,
const AcGePoint3d &lastPoint,
const AcGeMatrix3d &viewXform,
AcGePoint3dArray &snapPoints,
AcDbIntArray &geomIds,
const AcGeMatrix3d &insertionMat) const
{
assertReadEnabled () ;
return (AcDbEntity::subGetOsnapPoints (osnapMode, gsSelectionMark, pickPoint, lastPoint, viewXform, snapPoints, geomIds, insertionMat)) ;
}
//- Grip points protocol
Acad::ErrorStatus ArxCusEntity::subGetGripPoints (
AcGePoint3dArray &gripPoints, AcDbIntArray &osnapModes, AcDbIntArray &geomIds
) const {
assertReadEnabled () ;
//----- This method is never called unless you return eNotImplemented
//----- from the new getGripPoints() method below (which is the default implementation)
return (AcDbEntity::subGetGripPoints (gripPoints, osnapModes, geomIds)) ;
}
Acad::ErrorStatus ArxCusEntity::subMoveGripPointsAt (const AcDbIntArray &indices, const AcGeVector3d &offset) {
assertWriteEnabled () ;
//----- This method is never called unless you return eNotImplemented
//----- from the new moveGripPointsAt() method below (which is the default implementation)
return (AcDbEntity::subMoveGripPointsAt (indices, offset)) ;
}
Acad::ErrorStatus ArxCusEntity::subGetGripPoints (
AcDbGripDataPtrArray &grips, const double curViewUnitSize, const int gripSize,
const AcGeVector3d &curViewDir, const int bitflags
) const {
assertReadEnabled () ;
//----- If you return eNotImplemented here, that will force AutoCAD to call
//----- the older getGripPoints() implementation. The call below may return
//----- eNotImplemented depending of your base class.
return (AcDbEntity::subGetGripPoints (grips, curViewUnitSize, gripSize, curViewDir, bitflags)) ;
}
Acad::ErrorStatus ArxCusEntity::subMoveGripPointsAt (
const AcDbVoidPtrArray &gripAppData, const AcGeVector3d &offset,
const int bitflags
) {
assertWriteEnabled () ;
//----- If you return eNotImplemented here, that will force AutoCAD to call
//----- the older getGripPoints() implementation. The call below may return
//----- eNotImplemented depending of your base class.
return (AcDbEntity::subMoveGripPointsAt (gripAppData, offset, bitflags)) ;
}
二、创建测试项目
1、在解决方案下创建Arx测试项目，引用自定义实体
设置测试项目为当前启动项目，鼠标右键引用自定义实体工程
2、在测试项目中添加用户命令，添加自定义实体头文件
// (C) Copyright 2002-2007 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 Computer Software), as applicable.
//
//-----------------------------------------------------------------------------
//----- acrxEntryPoint.cpp
//-----------------------------------------------------------------------------
#include "StdAfx.h"
#include "resource.h"
#include "../Demo_CustomEntity/ArxCusEntity.h"
//-----------------------------------------------------------------------------
#define szRDS _RXST("Arx")
//-----------------------------------------------------------------------------
//----- ObjectARX EntryPoint
class CDemo_TSTCustomEntityApp : public AcRxArxApp {
public:
CDemo_TSTCustomEntityApp () : 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 () {
}
// - ArxDemo_TSTCustomEntity._MyCommand1 command (do not rename)
static void ArxDemo_TSTCustomEntity_MyCommand1(void)
{
// Add your code for command ArxDemo_TSTCustomEntity._MyCommand1 here
//定义自定义实体
ArxCusEntity *pArxArxCusEntity = new ArxCusEntity(AcGePoint3d(0,0,0),AcGePoint3d(100,0,0),AcGePoint3d(100,100,30));
AcDbBlockTable *pBlockTable =NULL;
//打开块表
acdbHostApplicationServices()->workingDatabase()->getBlockTable(pBlockTable,AcDb::kForRead);
AcDbBlockTableRecord *pBockTableRecord = NULL;
//打开模型空间
pBlockTable->getAt(ACDB_MODEL_SPACE,pBockTableRecord,AcDb::kForWrite);
AcDbObjectId lineId;
//添加实体到模型空间
pBockTableRecord->appendAcDbEntity(lineId,pArxArxCusEntity);
pBlockTable->close();
pBockTableRecord->close();
pArxArxCusEntity->close();
}
} ;
//-----------------------------------------------------------------------------
IMPLEMENT_ARX_ENTRYPOINT(CDemo_TSTCustomEntityApp)
ACED_ARXCOMMAND_ENTRY_AUTO(CDemo_TSTCustomEntityApp, ArxDemo_TSTCustomEntity, _MyCommand1, MyCommand1, ACRX_CMD_TRANSPARENT, NULL)
三、测试
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