#include "stdafx.h"
#include "resource.h"
#include "GsPreviewCtrl.h"
#include "acgsmanager.h"
#include "EarThwormDef.h"

#ifdef _DEBUG
#define new DEBUG_NEW
#undef THIS_FILE
static char THIS_FILE[] = __FILE__;
#endif

#define WM_VIEWDBLCLKSEL (WM_USER + 0x1200)

BOOL IsKeyPressed(int vk)
{
	SHORT nState = ::GetKeyState(vk);
	return ((nState & 256) != 0);
}

double g_nWalkDistStep = 1000.0, g_nWalkAngleStep = 5.0*PI / 180;;
#define RXASSERT ASSERT

double GetLatitude(AcGePoint3d ptCam, AcGePoint3d ptTar)
{
	double nDist = ptTar.distanceTo(ptCam);
	if (nDist < 1.e-6)
		return 0.0;

	if (ptTar.distanceTo(ptCam) < 1.e-5)
	{
		return ((ptTar.z > ptCam.z) ? PI / 2 : -PI / 2);
	}
	return asin((ptTar.z - ptCam.z) / nDist);
}


double GetLongitude(AcGePoint3d ptCam, AcGePoint3d ptTar) // 0 ~ 2*PI
{
	if (ptTar.distanceTo(ptCam) < 1.e-6)
		return 0.0;
	return ads_angle(asDblArray(ptCam), asDblArray(ptTar));
}

IMPLEMENT_DYNAMIC(CGsPreviewCtrl, CStatic)

CGsPreviewCtrl::CGsPreviewCtrl(int nOrbitFlag) : CStatic(), mOrbitFlag(nOrbitFlag),
mpManager(NULL), mpFactory(NULL), mpDevice(NULL), mpView(NULL),
mpModel(NULL), mbModelCreated(false), mbPanning(false), mbOrbiting(false),
mDistStep(g_nWalkDistStep), mAngStep(g_nWalkAngleStep)
{

}

BOOL CGsPreviewCtrl::DestroyWindow()
{
	clearAll();
	return CStatic::DestroyWindow();
}


BEGIN_MESSAGE_MAP(CGsPreviewCtrl, CStatic)
	//{{AFX_MSG_MAP(CGsPreviewCtrl)
	ON_WM_PAINT()
	ON_WM_SIZE()
	ON_WM_MOUSEWHEEL()
	ON_WM_LBUTTONDOWN()
	ON_WM_MBUTTONDOWN()
	ON_WM_MBUTTONUP()
	ON_WM_MOUSEMOVE()
	ON_WM_NCHITTEST()
	ON_WM_SETFOCUS()
	ON_WM_LBUTTONUP()
	ON_WM_KEYDOWN()
	ON_WM_LBUTTONDBLCLK()
	//}}AFX_MSG_MAP
	ON_WM_SETCURSOR()
END_MESSAGE_MAP()

void CGsPreviewCtrl::OnPaint()
{
	CPaintDC dc(this);
	//update the gs view
	if (mpView)
	{
		mpView->invalidate();
		mpView->update();
	}
}

// Erase view and delete model
void CGsPreviewCtrl::erasePreview()
{
	if (mpView)
		mpView->eraseAll();
	if (mpManager && mpModel) {
		mpManager->destroyAutoCADModel(mpModel);
		mpModel = NULL;
	}
}

void CGsPreviewCtrl::setModel(AcGsModel* pModel)
{
	erasePreview();
	mpModel = pModel;
	mbModelCreated = false;
}

void CGsPreviewCtrl::clearAll()
{
	if (mpView) {
		mpView->eraseAll();
	}
	if (mpDevice) {
		bool b = mpDevice->erase(mpView);
		RXASSERT(b);
	}

	if (mpFactory) {
		if (mpView) {
			mpFactory->deleteView(mpView);
			mpView = NULL;
		}
		if (mpGhostModel) {
			mpFactory->deleteModel(mpGhostModel);
			mpGhostModel = NULL;
		}
		mpFactory = NULL;
	}

	if (mpManager) {
		if (mpModel) {
			if (mbModelCreated)
				mpManager->destroyAutoCADModel(mpModel);
			mpModel = NULL;
		}

		if (mpDevice) {
			mpManager->destroyAutoCADDevice(mpDevice);
			mpDevice = NULL;
		}
		mpManager = NULL;
	}
}

BOOL CGsPreviewCtrl::GetCurrentViewInfo(const AcDbExtents& exts, AcGePoint3d & ptPosition, AcGePoint3d & ptTarget,
	AcGeVector3d& vecUpVector, double& dFieldWidth, double& dFieldHeight)
{
	// get the view port information - see parameter list
	double dHeight = 0.0, dWidth = 0.0, dViewTwist = 0.0;
	AcGePoint3d ptTargetView;
	AcGeVector3d vecViewDir;
	GetActiveViewPortInfo(dHeight, dWidth, ptTargetView, vecViewDir, dViewTwist, TRUE);

	// we are only interested in the directions of the view, not the sizes, so we normalise. 
	vecViewDir.normalize();

	// Our view coordinate space consists of z direction 
	// get a perp vector off the z direction
	// Make sure its normalised
	AcGeVector3d vecViewXDir = vecViewDir.perpVector().normal();
	// correct the x angle by applying the twist
	vecViewXDir = vecViewXDir.rotateBy(dViewTwist, -vecViewDir);
	// now we can work out y, this is of course perp to the x and z directions. No need to normalise this, 
	// as we know that x and z are of unit length, and perpendicular, so their cross product must be on unit length
	vecUpVector = vecViewDir.crossProduct(vecViewXDir);

	// Calculate the extents in WCS
	AcGePoint3d ptExtMax = exts.maxPoint();
	AcGePoint3d ptExtMin = exts.minPoint();

	// find a nice point around which to transform the view. We'll use the same point as the center of the view.
	ptTarget = ptExtMin + 0.5 * (ptExtMax - ptExtMin);

	ptPosition = ptTarget + vecViewDir;

	// create a transform from WCS to View space
	// this represents the transformation from WCS to the view space. (Actually not quite since 
	// we are keeping the fixed point as the center of the box for convenience )
	AcGeMatrix3d matView;
	matView = AcGeMatrix3d::alignCoordSys(ptTarget, AcGeVector3d::kXAxis, AcGeVector3d::kYAxis, AcGeVector3d::kZAxis,
		ptTarget, vecViewXDir, vecUpVector, vecViewDir).inverse();

	AcDbExtents extWcsExtents(ptExtMin, ptExtMax);
	// now we have the view Extents
	AcDbExtents extViewExtents = extWcsExtents;
	// transforms the extents in WCS->view space
	extViewExtents.transformBy(matView);

	// get the extents of the AutoCAD view
	dFieldWidth = fabs(extViewExtents.maxPoint().x - extViewExtents.minPoint().x);
	dFieldHeight = fabs(extViewExtents.maxPoint().y - extViewExtents.minPoint().y);

	return TRUE;
}

void CGsPreviewCtrl::InitFromCurrentView2D(const AcDbExtents& exts,bool bRestTarget)
{
	struct resbuf rb;
	acedGetVar(_T("CVPORT"), &rb);
	int iCurView = rb.resval.rint;
	acedGetVar(_T("TILEMODE"), &rb);
	int iTileMode = rb.resval.rint;

#ifndef ZWCAD
#if ARX < 20
	AcGsView::RenderMode eShadeMode;
	if (iTileMode == 0 && iCurView == 1)
		eShadeMode = AcGsView::k2DOptimized;
	else
		eShadeMode = AcGsView::k2DOptimized;
	mpView->setMode(eShadeMode);
#else
	AcGiVisualStyle style;
	if (iTileMode == 0 && iCurView == 1)
		style.setType(AcGiVisualStyle::k2DWireframe);
	else
		style.setType(AcGiVisualStyle::k2DWireframe);
	mpView->setVisualStyle(style);
#endif
#else
#if defined(R24)
	AcGsView::RenderMode eShadeMode;
	if (iTileMode == 0 && iCurView == 1)
		eShadeMode = AcGsView::k2DOptimized;
	else
		eShadeMode = AcGsView::k2DOptimized;
	mpView->setMode(eShadeMode);
#else
	AcGiVisualStyle style;
	if (iTileMode == 0 && iCurView == 1)
		style.setType(AcGiVisualStyle::k2DWireframe);
	else
		style.setType(AcGiVisualStyle::k2DWireframe);
	mpView->setVisualStyle(style);
#endif
#endif

	AcGeVector3d vecUpVector;
	AcGePoint3d ptPosition, ptTarget;
	double dFieldWidth, dFieldHeight;
	GetCurrentViewInfo(exts, ptPosition, ptTarget, vecUpVector, dFieldWidth, dFieldHeight);

	if (!vecUpVector.isParallelTo(AcGeVector3d::kYAxis))
	{
		vecUpVector = AcGeVector3d::kYAxis;//???显示Y方向看
	}
	
	if (bRestTarget)
		ptTarget.set(0,0,0);

	ptPosition.set(0,0,0);

	mpView->setView(ptPosition, ptTarget, vecUpVector, dFieldWidth, dFieldHeight);

	mpView->zoomExtents(exts.minPoint(),exts.maxPoint());

	mpView->zoom(1.1);

	mpView->invalidate();
}

void CGsPreviewCtrl::InitFromCurrentView3D(const AcDbExtents& exts, bool bRestTarget)
{
	struct resbuf rb;
	acedGetVar(_T("CVPORT"), &rb);
	int iCurView = rb.resval.rint;
	acedGetVar(_T("TILEMODE"), &rb);
	int iTileMode = rb.resval.rint;

#ifndef ZWCAD
#if ARX < 20
	mpView->setMode(AcGsView::kGouraudShaded);
#else
	mpView->setVisualStyle(AcGiVisualStyle::kGouraud);
#endif
#else
#if defined(R24)
	mpView->setMode(AcGsView::kGouraudShaded);
#else
	mpView->setVisualStyle(AcGiVisualStyle::kGouraud);
#endif
#endif

	AcGePoint3d extMax(500, 500, 500);// = pDb->extmax();
	AcGePoint3d extMin(-500, -500, -500);// = pDb->extmin();

	//AcGePoint3d extMax = pDb->extmax();
	//AcGePoint3d extMin = pDb->extmin();

	// get the view port information - see parameter list
	ads_real height = 0.0, width = 0.0, viewTwist = 0.0;
	AcGePoint3d targetView;
	AcGeVector3d viewDir;
	GetActiveViewPortInfo(height, width, targetView, viewDir, viewTwist, true);

	viewDir.set(-1, -1, 1);
	viewDir = viewDir.normal();

	
	AcGeVector3d viewXDir = viewDir.perpVector().normal();
	viewXDir = viewXDir.rotateBy(viewTwist, -viewDir);
	AcGeVector3d viewYDir = viewDir.crossProduct(viewXDir);

	AcGePoint3d boxCenter = extMin + 0.5 * (extMax - extMin);

	AcGeMatrix3d viewMat = AcGeMatrix3d::alignCoordSys(boxCenter, AcGeVector3d::kXAxis, AcGeVector3d::kYAxis, AcGeVector3d::kZAxis,
		boxCenter, viewXDir, viewYDir, viewDir).inverse();

	AcDbExtents wcsExtents(extMin, extMax);
	AcDbExtents viewExtents = wcsExtents;
	viewExtents.transformBy(viewMat);

	double xMax = fabs(viewExtents.maxPoint().x - viewExtents.minPoint().x);
	double yMax = fabs(viewExtents.maxPoint().y - viewExtents.minPoint().y);

	AcGePoint3d eye = boxCenter + viewDir;

	mpView->setView(eye, boxCenter, viewYDir, xMax, yMax);

	//if (mpView != NULL)
	//{
	//	mpView->invalidate();
	//	mpView->update();
	//}

}

BOOL CGsPreviewCtrl::GetActiveViewPortInfo(double &dHeight, double &dWidth, AcGePoint3d &ptTarget,
	AcGeVector3d &vecViewDir, double &dViewTwist, BOOL bGetViewCenter)
{
	// get the working db
	AcDbDatabase *pDb = acdbHostApplicationServices()->workingDatabase();
	// if not ok
	if (pDb == NULL)
		return FALSE;

	// lock document
	//AcApDocument* pDoc = acDocManager->curDocument();
	//acDocManager->lockDocument(pDoc);

	// make sure the active view port is uptodate
	//acedVports2VportTableRecords();

	// unlock document
	//acDocManager->unlockDocument(pDoc);

	// open the view port records
	AcDbViewportTable *pVTable = NULL;
	Acad::ErrorStatus es = pDb->getViewportTable(pVTable, AcDb::kForRead);
	// if we opened them ok
	if (es == Acad::eOk)
	{
		AcDbViewportTableRecord *pViewPortRec = NULL;
		es = pVTable->getAt(_T("*Active"), pViewPortRec, AcDb::kForRead);
		if (es == Acad::eOk)
		{
			// get the height of the view
			dHeight = pViewPortRec->height();
			// get the width
			dWidth = pViewPortRec->width();
			// if the user wants the center of the viewport used
			if (bGetViewCenter)
			{
				struct resbuf rb;
				memset(&rb, 0, sizeof(struct resbuf));
				// get the system var VIEWCTR
				acedGetVar(_T("VIEWCTR"), &rb);
				// set that as the target
				ptTarget = AcGePoint3d(rb.resval.rpoint[X], rb.resval.rpoint[Y], rb.resval.rpoint[Z]);
			}
			else
			{
				// we want the viewports camera target setting
				// get the target of the view
				ptTarget = pViewPortRec->target();
			}

			// get the view direction
			vecViewDir = pViewPortRec->viewDirection();
			// get the view twist of the viewport
			dViewTwist = pViewPortRec->viewTwist();
		}
		// close after use
		pVTable->close();
		pViewPortRec->close();
	}

	return TRUE;
}

BOOL CGsPreviewCtrl::GetCurrentViewInfo(AcGePoint3d & ptPosition, AcGePoint3d & ptTarget,
	AcGeVector3d& vecUpVector, double& dFieldWidth, double& dFieldHeight)
{
	// get the view port information - see parameter list
	double dHeight = 0.0, dWidth = 0.0, dViewTwist = 0.0;
	AcGePoint3d ptTargetView;
	AcGeVector3d vecViewDir;
	GetActiveViewPortInfo(dHeight, dWidth, ptTargetView, vecViewDir, dViewTwist, TRUE);

	// we are only interested in the directions of the view, not the sizes, so we normalise. 
	vecViewDir.normalize();

	// Our view coordinate space consists of z direction 
	// get a perp vector off the z direction
	// Make sure its normalised
	AcGeVector3d vecViewXDir = vecViewDir.perpVector().normal();
	// correct the x angle by applying the twist
	vecViewXDir = vecViewXDir.rotateBy(dViewTwist, -vecViewDir);
	// now we can work out y, this is of course perp to the x and z directions. No need to normalise this, 
	// as we know that x and z are of unit length, and perpendicular, so their cross product must be on unit length
	vecUpVector = vecViewDir.crossProduct(vecViewXDir);

	// the current editor drawing
	AcDbDatabase* pDb = acdbHostApplicationServices()->workingDatabase();
	// Calculate the extents in WCS
	AcGePoint3d ptExtMax = pDb->extmax();
	AcGePoint3d ptExtMin = pDb->extmin();

	// find a nice point around which to transform the view. We'll use the same point as the center of the view.
	ptTarget = ptExtMin + 0.5 * (ptExtMax - ptExtMin);

	ptPosition = ptTarget + vecViewDir;

	// create a transform from WCS to View space
	// this represents the transformation from WCS to the view space. (Actually not quite since 
	// we are keeping the fixed point as the center of the box for convenience )
	AcGeMatrix3d matView;
	matView = AcGeMatrix3d::alignCoordSys(ptTarget, AcGeVector3d::kXAxis, AcGeVector3d::kYAxis, AcGeVector3d::kZAxis,
		ptTarget, vecViewXDir, vecUpVector, vecViewDir).inverse();

	AcDbExtents extWcsExtents(ptExtMin, ptExtMax);
	// now we have the view Extents
	AcDbExtents extViewExtents = extWcsExtents;
	// transforms the extents in WCS->view space
	extViewExtents.transformBy(matView);

	// get the extents of the AutoCAD view
	dFieldWidth = fabs(extViewExtents.maxPoint().x - extViewExtents.minPoint().x);
	dFieldHeight = fabs(extViewExtents.maxPoint().y - extViewExtents.minPoint().y);

	return TRUE;
}

void CGsPreviewCtrl::init(bool bCreateModel)
{
	//Load our special cursors
	{
		CAcModuleResourceOverride  vTemp;
		CWinApp *pApp = AfxGetApp();
		mhPanCursor = pApp->LoadCursor(IDI_PAN);
		mhCrossCursor = pApp->LoadCursor(IDI_CROSS);
		mhOrbitCursor = pApp->LoadCursor(IDI_ORBIT);
		mhEditCursor = pApp->LoadCursor(IDC_CURSOREDIT);
	}

	//Instantiate view, a device and a model object
	CRect rect;
	if (!mpManager) {
		mpManager = acgsGetGsManager();
		RXASSERT(mpManager);
#if (ARX >= 20)
		AcGsKernelDescriptor desc;
		desc.addRequirement(AcGsKernelDescriptor::k3DDrawing);
		mpFactory = AcGsManager::acquireGraphicsKernel(desc);
		if (!mpFactory) return;
#else
		mpFactory = mpManager->getGSClassFactory();
#endif
		RXASSERT(mpFactory);
		//a device with standard autocad color palette
#if (ARX >= 20)
		//mpDevice = mpFactory->createOffScreenDevice();
		mpDevice = mpManager->createAutoCADDevice(*mpFactory, m_hWnd);
#else
		mpDevice = mpManager->createAutoCADDevice(m_hWnd);
#endif
		RXASSERT(mpDevice);

		GetClientRect(&rect);
		mpDevice->onSize(rect.Width(), rect.Height());
		//a simple view
		mpView = mpFactory->createView();
		RXASSERT(mpView);
		if (bCreateModel)
		{
			RXASSERT(mpModel == NULL);
			//a model with open/close protocol
#if (ARX >= 20)
			mpModel = mpManager->createAutoCADModel(*mpFactory);
#else
			mpModel = mpManager->createAutoCADModel();
#endif
			RXASSERT(mpModel);
			mbModelCreated = true;
		}
		//another model without open/close for the orbit gadget
		mpGhostModel = mpFactory->createModel(AcGsModel::kDirect, 0, 0, 0);
		if (mOrbitFlag) {
			/*
			mpView->add(&mOrbitGadget,mpGhostModel);
			mOrbitGadget.setGsView(mpView);
			*/
		}
		mpDevice->add(mpView);
		mpView->setView(AcGePoint3d(0.0, 0.0, 1.0),
			AcGePoint3d(0.0, 0.0, 0.0),
			AcGeVector3d(0.0, 0.0, 1.0),
			1.0, 1.0);
	}
}

BOOL CGsPreviewCtrl::Add(AcDbEntity* pEnt)
{
	if (mpView != NULL)
	{
		mpView->add(pEnt, mpModel);
		mpView->invalidate();
	}
	return TRUE;
}

void CGsPreviewCtrl::OnSize(UINT nType, int cx, int cy)
{
	CRect rect;
	if (mpDevice) {
		GetClientRect(&rect);
		mpDevice->onSize(rect.Width(), rect.Height());
	}
}

BOOL CGsPreviewCtrl::OnMouseWheel(UINT nFlags, short zDelta, CPoint pt)
{
	if (!(mOrbitFlag&OBF_ZOOM))
		return CStatic::OnMouseWheel(nFlags, zDelta, pt);
	if (mpView)
	{
		if (mpView->isPerspective())
		{
			AcGePoint3d ptTar = mpView->target();
			AcGePoint3d ptCam = mpView->position();
			AcGeVector3d vtView = ptTar - ptCam;
			vtView.normalize();
			double nScale = mDistStep;
			if (zDelta < 0)
				nScale = -nScale;
			vtView *= nScale;
			ptCam += vtView;
			ptTar += vtView;

			mpView->setView(ptCam, ptTar, AcGeVector3d(0, 0, 1), mpView->fieldWidth(),
				mpView->fieldHeight(), AcGsView::kPerspective);
			//mpView->setTarget(ptTar);
			//mpView->setCamera(ptCam);
		}
		else
		{
			if (zDelta < 0)
				mpView->zoom(0.9);
			else
				mpView->zoom(1.1);
		}
		//Invalidate();//闪的利害
		RedrawWindow();
	}
	return TRUE;
}

void CGsPreviewCtrl::OnLButtonDown(UINT nFlags, CPoint point)
{
	SetFocus();

	if ((mOrbitFlag & OBF_COTE))
	{
		CRect rc;
		GetClientRect(&rc);

		CPoint pt = point;
		AcGePoint3d ptGe1(pt.x, (rc.Height() - pt.y), 0.0);
		ptGe1.transformBy(mpView->worldToDeviceMatrix().inverse());

		GetParent()->SendMessage(WM_VIEW_LBUTTONDOWN, 0, (LPARAM)&ptGe1);

		::SetCursor(mhEditCursor);
		return;
	}

	if (!(mOrbitFlag & OBF_ORBIT))
	{
		CStatic::OnLButtonDown(nFlags, point);
		return;
	}

	//start orbit
	mbOrbiting = true;
	SetCapture();
	//set up the proper cursor
	//::SetClassLong(m_hWnd,GCL_HCURSOR,NULL);
	::SetCursor(mhOrbitCursor);
	//store the start point
	mStartPt = point;

	ClientToScreen(&point);
	GetParent()->ScreenToClient(&point);
	GetParent()->SendMessage(WM_LBUTTONDOWN, nFlags, MAKELPARAM(point.x, point.y));
}

void CGsPreviewCtrl::OnLButtonUp(UINT nFlags, CPoint point)
{
	if ((mOrbitFlag & OBF_COTE))
	{
		::SetCursor(mhEditCursor);
		ReleaseCapture();
		return;
	}

	if (!(mOrbitFlag&OBF_ORBIT)) {
		CStatic::OnLButtonUp(nFlags, point);
		return;
	}

	//end orbit
	mbOrbiting = false;
	//::SetClassLong(m_hWnd,GCL_HCURSOR,(long)mhCrossCursor);
	::SetCursor(mhCrossCursor);
	ReleaseCapture();
}

void CGsPreviewCtrl::OnLButtonDblClk(UINT nFlags, CPoint point) 
{
	ClientToScreen(&point);
	GetParent()->ScreenToClient(&point);
	GetParent()->SendMessage(WM_LBUTTONDBLCLK,nFlags,MAKELPARAM(point.x,point.y));
	GetParent()->SendMessage(WM_VIEWDBLCLKSEL,0,0);
}

void CGsPreviewCtrl::OnMButtonDown(UINT nFlags, CPoint point)
{
	if (!(mOrbitFlag&OBF_PAN)) {
		CStatic::OnMButtonDown(nFlags, point);
		return;
	}

	//start pan
	mbPanning = true;
	SetCapture();
	//set up the proper cursor
	//::SetClassLong(m_hWnd,GCL_HCURSOR,NULL);
	::SetCursor(mhPanCursor);
	//store the start point
	mStartPt = point;


}

void CGsPreviewCtrl::OnMButtonUp(UINT nFlags, CPoint point)
{
	if (!(mOrbitFlag&OBF_PAN)) {
		CStatic::OnMButtonUp(nFlags, point);
		return;
	}

	//end pan
	ReleaseCapture();
	mbPanning = false;
	//::SetClassLong(m_hWnd,GCL_HCURSOR,(long)mhCrossCursor);
	::SetCursor(mhCrossCursor);
}
void CGsPreviewCtrl::Invalidate(BOOL bErase)
{
#if(ARX<17)
	CStatic::Invalidate(bErase);
#else
	{
		CWnd*pParent = GetParent();
		if (pParent != NULL)//2008+vista发现刷新问题，暂用此方法解决
		{
			CRect rect;
			GetWindowRect(rect);
			pParent->ScreenToClient(rect);
			pParent->InvalidateRect(rect, bErase);
		}
		else
		{
			CStatic::Invalidate(bErase);
		}
	}
#endif
}
void CGsPreviewCtrl::OnMouseMove(UINT nFlags, CPoint point)
{
	if (mpView && mbPanning && (mOrbitFlag&OBF_PAN))
	{
		//transform the point from device coordinates to
		//world coordinates
		AcGeVector3d pan_vec(-(point.x - mStartPt.x), point.y - mStartPt.y, 0);
		pan_vec.transformBy(mpView->viewingMatrix() * mpView->worldToDeviceMatrix().inverse());
		mpView->dolly(pan_vec);
		//Invalidate();
		RedrawWindow();
		mStartPt = point;
	}
	else if (mpView && mbOrbiting && (mOrbitFlag&OBF_ORBIT))
	{
		AcGeVector3d vtMov(mStartPt.x - point.x, point.y - mStartPt.y, 0.0);
		AcGePoint3d ptCam = mpView->position();
		AcGePoint3d ptTar = mpView->target();
		AcGeVector3d vtUp = mpView->upVector();
		vtUp = AcGeVector3d(0, 0, 1);
		CRect rect;
		GetClientRect(rect);
		double nRotX = -vtMov.y / rect.Height()*PI / 2;
		double nRotY = -vtMov.x / rect.Width()*PI / 2;

		AcGeVector3d vtZ = ptCam - ptTar;
		AcGePlane plan(ptCam, vtZ);
		AcGePoint3d ptUp = ptCam + vtUp*10000.0;
		AcGePoint3d ptUp1 = ptUp.orthoProject(plan);
		if (ptCam.distanceTo(ptUp1) < 0.1)
			return;
		AcGeVector3d vtY = ptUp1 - ptCam;
		AcGeVector3d vtX = vtY.crossProduct(vtZ);
		vtX.normalize();
		vtY.normalize();
		vtZ.normalize();

		AcGeVector3d vtView = ptTar - ptCam;

		vtView.rotateBy(nRotX, vtX);
		vtY.rotateBy(nRotX, vtX);
		vtView.rotateBy(nRotY, vtY);
		ptTar = ptCam + vtView;
		mpView->setView(ptCam, ptTar, vtUp, mpView->fieldWidth(), mpView->fieldHeight(),
			mpView->isPerspective() ? AcGsView::kPerspective : AcGsView::kParallel);

		//Invalidate();
		RedrawWindow();
		mStartPt = point;
	}
	else
	{
		CStatic::OnMouseMove(nFlags, point);
	}

}

#if ARX<17
UINT CGsPreviewCtrl::OnNcHitTest(CPoint point)
#else 
LRESULT CGsPreviewCtrl::OnNcHitTest(CPoint point)
#endif
{
	return HTCLIENT;
}


void CGsPreviewCtrl::OnSetFocus(CWnd* pOldWnd)
{
	if (mOrbitFlag && mhCrossCursor)
	{
		::SetCursor(mhCrossCursor);
	}
}

void CGsPreviewCtrl::OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags)
{
	BOOL bShift = IsKeyPressed(VK_SHIFT);
	BOOL bCtrl = IsKeyPressed(VK_CONTROL);
	if (!mpView) return;

	AcGePoint3d ptCam = mpView->position();
	AcGePoint3d ptTar = mpView->target();
	AcGeVector3d vtView = ptTar - ptCam;
	vtView.normalize();
	AcGeVector3d vtUp(0, 0, 1);
	if (nChar == VK_LEFT || nChar == VK_RIGHT)
	{
		double nFactor = 1.0;
		if (nChar == VK_RIGHT)
			nFactor = -1.0;
		if (!bShift && !bCtrl)
		{ //左右移
			double nStepLen = mDistStep*nRepCnt;
			double longitude = GetLongitude(ptCam, ptTar);
			AcGeMatrix3d mat;

			AcGePoint3d ptTmp(nStepLen*cos(longitude + PI / 2.0*nFactor),
				nStepLen*sin(longitude + PI / 2.0*nFactor), 0.0);
			mat.setToTranslation(ptTmp.asVector());

			ptCam.transformBy(mat);
			ptTar.transformBy(mat);
		}
		else if (bCtrl)
		{ //左右转 PI/2
			double val = GetLongitude(ptCam, ptTar) + PI / 2.0 * nFactor;
			double nElev = ptTar.z;
			ads_polar(asDblArray(ptCam), val, ptCam.distanceTo(ptTar), asDblArray(ptTar));
			ptTar.z = nElev;
		}
		else if (bShift) { //左右转
			double val = GetLongitude(ptCam, ptTar) + mAngStep*nRepCnt*nFactor;
			double nElev = ptTar.z;
			ads_polar(asDblArray(ptCam), val, ptCam.distanceTo(ptTar), asDblArray(ptTar));
			ptTar.z = nElev;
		}
	}
	else if (nChar == VK_UP || nChar == VK_DOWN)
	{
		double nFactor = 1.0;
		if (nChar == VK_DOWN)
			nFactor = -1.0;
		if (!bShift && !bCtrl) { //前进或后退
			AcGeMatrix3d mat;
			double nStepLen = mDistStep*nRepCnt*nFactor;
			double longitude = GetLongitude(ptCam, ptTar);

			AcGePoint3d ptT(nStepLen*cos(longitude), nStepLen*sin(longitude), 0);
			mat.setToTranslation(ptT.asVector());

			ptCam.transformBy(mat);
			ptTar.transformBy(mat);
		}
		else if (bCtrl) { //上下移动
			ptCam.z += mDistStep*nRepCnt*nFactor;
			ptTar.z += mDistStep*nRepCnt*nFactor;
		}
		else if (bShift) { //上下转动
			double val = GetLatitude(ptCam, ptTar) + mAngStep*nRepCnt*nFactor;
			double nElevDiff = ptCam.distanceTo(ptTar)*tan(val);
			ptTar.z = ptCam.z + nElevDiff;
		}
	}
	else {
		CStatic::OnKeyDown(nChar, nRepCnt, nFlags);
		return;
	}
	mpView->setView(ptCam, ptTar, vtUp, mpView->fieldWidth(), mpView->fieldHeight(),
		mpView->isPerspective() ? AcGsView::kPerspective : AcGsView::kParallel);
	//Invalidate();
	RedrawWindow();
}



BOOL CGsPreviewCtrl::PreTranslateMessage(MSG* pMsg)
{
	// TODO: Add your specialized code here and/or call the base class
	if (pMsg->message == WM_KEYDOWN) {
		INT_PTR vk = pMsg->wParam;
		if (vk == VK_LEFT || vk == VK_RIGHT || vk == VK_DOWN || vk == VK_UP) {
			int nRepCnt = LOWORD(pMsg->lParam);
			OnKeyDown((UINT)vk, nRepCnt, 0);
			return TRUE;
		}
	}
	return CStatic::PreTranslateMessage(pMsg);
}


BOOL CGsPreviewCtrl::OnSetCursor(CWnd* pWnd, UINT nHitTest, UINT message)
{
	if ((mOrbitFlag & OBF_COTE))
	{
		SetCursor(mhEditCursor);
		return FALSE;
	}
	return CStatic::OnSetCursor(pWnd, nHitTest, message);
}

void CGsPreviewCtrl::RefreshView()
{
	if (mpView != NULL)
	{
		mpView->invalidate();
		mpView->update();
	}
}

void CGsPreviewCtrl::OnZoomExtents(AcDbDatabase* pDb)
{
	AcDbExtents viewExtents(pDb->extmin(), pDb->extmax());
	AcGeMatrix3d viewMatrix;
	viewExtents.transformBy(viewMatrix);

	//mpView->zoomExtents(viewExtents.minPoint(),viewExtents.maxPoint());
	RefreshView();
}