OGRLineString *ILI2Reader::getArc(DOMElement *elem) {
// elem -> ARC
OGRLineString *ls = new OGRLineString();
// previous point -> start point
OGRPoint *ptStart = getPoint((DOMElement *)elem->getPreviousSibling()); // COORD or ARC
// end point
OGRPoint *ptEnd = new OGRPoint();
// point on the arc
OGRPoint *ptOnArc = new OGRPoint();
double radius = 0; // radius
DOMElement *arcElem = (DOMElement *)elem->getFirstChild();
while (arcElem != NULL) {
char* pszTagName = XMLString::transcode(arcElem->getTagName());
char* pszObjValue = getObjValue(arcElem);
if (cmpStr("C1", pszTagName) == 0)
ptEnd->setX(atof(pszObjValue));
else if (cmpStr("C2", pszTagName) == 0)
ptEnd->setY(atof(pszObjValue));
else if (cmpStr("C3", pszTagName) == 0)
ptEnd->setZ(atof(pszObjValue));
else if (cmpStr("A1", pszTagName) == 0)
ptOnArc->setX(atof(pszObjValue));
else if (cmpStr("A2", pszTagName) == 0)
ptOnArc->setY(atof(pszObjValue));
else if (cmpStr("A3", pszTagName) == 0)
ptOnArc->setZ(atof(pszObjValue));
else if (cmpStr("R", pszTagName) == 0)
radius = atof(pszObjValue);
CPLFree(pszObjValue);
XMLString::release(&pszTagName);
arcElem = (DOMElement *)arcElem->getNextSibling();
}
ptEnd->flattenTo2D();
ptOnArc->flattenTo2D();
interpolateArc(ls, ptStart, ptOnArc, ptEnd, arcIncr);
delete ptStart;
delete ptOnArc;
delete ptEnd;
return ls;
}
OGRPoint *getPoint(DOMElement *elem) {
// elem -> COORD (or ARC)
OGRPoint *pt = new OGRPoint();
DOMElement *coordElem = (DOMElement *)elem->getFirstChild();
while (coordElem != NULL) {
char* pszTagName = XMLString::transcode(coordElem->getTagName());
char* pszObjValue = getObjValue(coordElem);
if (cmpStr("C1", pszTagName) == 0)
pt->setX(atof(pszObjValue));
else if (cmpStr("C2", pszTagName) == 0)
pt->setY(atof(pszObjValue));
else if (cmpStr("C3", pszTagName) == 0)
pt->setZ(atof(pszObjValue));
CPLFree(pszObjValue);
XMLString::release(&pszTagName);
coordElem = (DOMElement *)coordElem->getNextSibling();
}
pt->flattenTo2D();
return pt;
}
OGRLineString *getLineString(DOMElement *elem, int bAsLinearRing) {
// elem -> POLYLINE
OGRLineString *ls;
if (bAsLinearRing)
ls = new OGRLinearRing();
else
ls = new OGRLineString();
DOMElement *lineElem = (DOMElement *)elem->getFirstChild();
while (lineElem != NULL) {
char* pszTagName = XMLString::transcode(lineElem->getTagName());
if (cmpStr(ILI2_COORD, pszTagName) == 0)
{
OGRPoint* poPoint = getPoint(lineElem);
ls->addPoint(poPoint);
delete poPoint;
}
else if (cmpStr(ILI2_ARC, pszTagName) == 0) {
// end point
OGRPoint *ptEnd = new OGRPoint();
// point on the arc
OGRPoint *ptOnArc = new OGRPoint();
// radius
double radius = 0;
DOMElement *arcElem = (DOMElement *)lineElem->getFirstChild();
while (arcElem != NULL) {
char* pszTagName = XMLString::transcode(arcElem->getTagName());
char* pszObjValue = getObjValue(arcElem);
if (cmpStr("C1", pszTagName) == 0)
ptEnd->setX(atof(pszObjValue));
else if (cmpStr("C2", pszTagName) == 0)
ptEnd->setY(atof(pszObjValue));
else if (cmpStr("C3", pszTagName) == 0)
ptEnd->setZ(atof(pszObjValue));
else if (cmpStr("A1", pszTagName) == 0)
ptOnArc->setX(atof(pszObjValue));
else if (cmpStr("A2", pszTagName) == 0)
ptOnArc->setY(atof(pszObjValue));
else if (cmpStr("A3", pszTagName) == 0)
ptOnArc->setZ(atof(pszObjValue));
else if (cmpStr("R", pszTagName) == 0)
radius = atof(pszObjValue);
CPLFree(pszObjValue);
XMLString::release(&pszTagName);
arcElem = (DOMElement *)arcElem->getNextSibling();
}
ptEnd->flattenTo2D();
ptOnArc->flattenTo2D();
OGRPoint *ptStart = getPoint((DOMElement *)lineElem->getPreviousSibling()); // COORD or ARC
interpolateArc(ls, ptStart, ptOnArc, ptEnd, PI/180);
delete ptStart;
delete ptEnd;
delete ptOnArc;
} /* else { // FIXME StructureValue in Polyline not yet supported
} */
XMLString::release(&pszTagName);
lineElem = (DOMElement *)lineElem->getNextSibling();
}
return ls;
}
