String GetSelectedExtent() {
ads_name selection;
int returnValue = acedSSGet(_T("I"), NULL, NULL, NULL, selection);
if (returnValue == RTCAN) return 0;
if (returnValue != RTNORM) {
return L"";
}
if (acedSSSetFirst(selection, NULL) != RTNORM) {
acedSSFree(selection);
return L"";
}
ads_name element;
acedSSName(selection, 0, element);
acedSSFree(selection);
AcDbObjectId idEntity;
if (acdbGetObjectId(idEntity, element) != Acad::eOk) {
acedSSFree(element);
return L"";
}
AcDbEntity * entity;
if ((acdbGetObjectId(idEntity, element) != Acad::eOk) ||
(acdbOpenObject(entity, idEntity, AcDb::kForRead) != Acad::eOk)) {
acedSSFree(element);
return L"";
}
acedSSFree(element);
if (!entity->isKindOf(AcDbPolyline::desc())) return L"";
AcDbPolyline * poly = static_cast<AcDbPolyline*>(entity);
if (!poly->isClosed()) return 0;
String extent = L"POLYGON((";
AcGePoint2d start;
AcGePoint2d current;
for (int i = 0; i < poly->numVerts(); i++) {
poly->getPointAt(i, current);
if (i > 0) {
extent += L", ";
} else {
start = current;
}
extent += Round(current.x, 0) + L" " + Round(current.y, 0);
}
if (!start.isEqualTo(current)) {
extent += L", " + Round(start.x, 0) + L" " + Round(start.y, 0);
}
extent += L"))";
poly->close();
return extent;
}
CCadEntity * CCadEntityFactory::GetCadEntity(AcDbEntity * entity)
{
CCadEntity * cadEntity = 0;
if (entity->isKindOf(AcDbPoint::desc()) ||
entity->isKindOf(AcDbText::desc()) ||
entity->isKindOf(AcDbMText::desc()) ||
entity->isKindOf(AcDbBlockReference::desc())) {
cadEntity = new CCadPoint(entity);
} else if (entity->isKindOf(AcDbLine::desc()) ||
entity->isKindOf(AcDbArc::desc()) ||
entity->isKindOf(AcDbSpline::desc())) {
cadEntity = new CCadLine(entity);
} else if (entity->isKindOf(AcDbEllipse::desc()) ||
entity->isKindOf(AcDbCircle::desc())) {
cadEntity = new CCadPolygon(entity);
} else if (entity->isKindOf(AcDb2dPolyline::desc())) {
AcDb2dPolyline * e = AcDb2dPolyline::cast(entity);
if (e->isClosed()) cadEntity = new CCadPolygon(entity);
else cadEntity = new CCadLine(entity);
} else if (entity->isKindOf(AcDbPolyline::desc())) {
AcDbPolyline * e = AcDbPolyline::cast(entity);
if (e->isClosed()) cadEntity = new CCadPolygon(entity);
else cadEntity = new CCadLine(entity);
}
resbuf * data = entity->xData(APPNAME);
if (data != NULL) cadEntity->SetData(CFeatureData(data->rbnext->resval.rstring));
acutRelRb(data);
return cadEntity;
}
virtual Acad::ErrorStatus getOsnapInfo(
AcDbEntity* pickedObject,
Adesk::GsMarker gsSelectionMark,
const AcGePoint3d& pickPoint,
const AcGePoint3d& lastPoint,
const AcGeMatrix3d& viewXform,
AcArray<AcGePoint3d>& snapPoints,
AcArray<int>& geomIdsForPts,
AcArray<AcGeCurve3d*>& snapCurves,
AcArray<int>& geomIdsForLines)
{
// Specialised implementation for AcDbPolylines:
// Parametrisation of AcDbPolylines is different: each whole numbered paramater appears
// at a vertex, so we cannot simply divide by three to get the correct parameter.
// Protocol Extension insures that the following assertion is always
// true, but check in non-prod versions just to be safe.
assert( pickedObject->isKindOf( AcDbPolyline::desc() ));
// but in production, a hard cast is fastest
AcDbPolyline *pPline = (AcDbPolyline*)pickedObject;
Acad::ErrorStatus es;
if ( bSnapToSegments )
{
// Snap to a third of each of the segments
unsigned int numSegs = pPline->numVerts() - 1;
AcGeLineSeg3d segLn;
AcGeCircArc3d segArc;
double startParam, endParam, newParam, dist;
AcGePoint3d pt;
for ( unsigned int idx = 0; idx < numSegs; idx++ )
{
switch( pPline->segType( idx ))
{
case AcDbPolyline::kLine:
es=pPline->getLineSegAt( idx, segLn );
startParam = segLn.paramOf( segLn.startPoint() );
endParam = segLn.paramOf( segLn.endPoint() );
snapPoints.append(segLn.evalPoint( startParam + ((endParam - startParam) / 3 )));
snapPoints.append(segLn.evalPoint( startParam + ((endParam - startParam) * 2 / 3 )));
break;
case AcDbPolyline::kArc:
es=pPline->getArcSegAt( idx, segArc );
startParam = segArc.paramOf( segArc.startPoint() );
endParam = segArc.paramOf( segArc.endPoint() );
dist = segArc.length( startParam, endParam );
newParam = segArc.paramAtLength( startParam, dist / 3 );
snapPoints.append( segArc.evalPoint( newParam ));
newParam = segArc.paramAtLength( startParam, dist * 2 / 3 );
snapPoints.append( segArc.evalPoint( newParam ));
break;
default:
break;
}
}
}
else {
double endParam;
AcGePoint3d pt;
double dist;
es=pPline->getEndParam( endParam );
es=pPline->getDistAtParam( endParam, dist );
es=pPline->getPointAtDist( dist / 3, pt );
assert(Acad::eOk==es);
snapPoints.append( pt );
es=pPline->getPointAtDist( dist * 2 / 3, pt );
assert(Acad::eOk==es);
snapPoints.append( pt );
if ( pPline->isClosed() )
{
es=pPline->getStartPoint( pt );
snapPoints.append( pt );
}
}
return Acad::eOk;
}