Get Coordinate System

Anonymous — Fri, 06 May 2016 06:34:48 GMT

hello

i want to get current Coordinate System

is WCS or UCS or ECS or DCS

is any function can do it?

thanks

Re: Get Coordinate System

Alexander.Rivilis — Sun, 08 May 2016 12:58:27 GMT

What do you mean for "current coordinate system"? Usually it is a UCS (User Coordinate System).

Re: Get Coordinate System

tbrammer — Mon, 09 May 2016 07:18:48 GMT

Get/Set UCS:
Acad::ErrorStatus acedGetCurrentUCS(AcGeMatrix3d& mat);
Acad::ErrorStatus acedSetCurrentUCS(const AcGeMatrix3d & mat);

General coordinate system transformation (see docs):
int acedTrans(const ads_point pt, const struct resbuf *from, const resbuf *to, int disp, ads_point result);

Determine the current view (also shows usage of acedTrans()):

void getCurrentView(AcDbViewTableRecord &view)
{
	struct resbuf var; 
	struct resbuf WCS, UCS, DCS; 

	WCS.restype = RTSHORT; 
	WCS.resval.rint = 0; 
	UCS.restype = RTSHORT; 
	UCS.resval.rint = 1; 
	DCS.restype = RTSHORT; 
	DCS.resval.rint = 2; 

	acedGetVar(_T("VIEWMODE"), &var); 
	view.setPerspectiveEnabled(var.resval.rint & 1);
	view.setFrontClipEnabled((var.resval.rint & 2) ? true : false); 
	view.setBackClipEnabled((var.resval.rint & 4) ? true : false); 
	view.setFrontClipAtEye(!(var.resval.rint & 16)); 

	acedGetVar(_T("BACKZ"), &var); 
	view.setBackClipDistance(var.resval.rreal); 

	acedGetVar(_T("VIEWCTR"), &var); 
	acedTrans(var.resval.rpoint, &UCS, &DCS, NULL, var.resval.rpoint); 
	view.setCenterPoint(AcGePoint2d(var.resval.rpoint[X],var.resval.rpoint[Y])); 

	acedGetVar(_T("FRONTZ"), &var); 
	view.setFrontClipDistance(var.resval.rreal); 

	acedGetVar(_T("LENSLENGTH"), &var); 
	view.setLensLength(var.resval.rreal); 

	acedGetVar(_T("TARGET"), &var); 
	acedTrans(var.resval.rpoint, &UCS, &WCS, NULL, var.resval.rpoint); 
	view.setTarget(AcGePoint3d(var.resval.rpoint[X], var.resval.rpoint[Y],var.resval.rpoint[Z])); 

	acedGetVar(_T("VIEWDIR"), &var); 
	acedTrans(var.resval.rpoint, &UCS, &WCS, TRUE, var.resval.rpoint); 
	view.setViewDirection(AcGeVector3d(var.resval.rpoint[X],var.resval.rpoint[Y], var.resval.rpoint[Z]));

	acedGetVar(_T("VIEWSIZE"), &var); 
	view.setHeight(var.resval.rreal); 
	view.setWidth(1); 

	acedGetVar(_T("VIEWTWIST"), &var); 
	view.setViewTwist(var.resval.rreal);
}

Pick whatever you need .

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