OGRErr OGRDXFLayer::CollectPolylinePath( OGRGeometryCollection *poGC )
{
int nCode;
char szLineBuf[257];
DXFSmoothPolyline oSmoothPolyline;
double dfBulge = 0.0;
double dfX = 0.0, dfY = 0.0;
int bHaveX = FALSE, bHaveY = FALSE;
int bIsClosed = FALSE;
int nVertexCount = -1;
int bHaveBulges = FALSE;
/* -------------------------------------------------------------------- */
/* Read the boundary path type. */
/* -------------------------------------------------------------------- */
while( (nCode = poDS->ReadValue(szLineBuf,sizeof(szLineBuf))) > 0 )
{
if( nVertexCount > 0 && (int) oSmoothPolyline.size() == nVertexCount )
break;
switch( nCode )
{
case 93:
nVertexCount = atoi(szLineBuf);
break;
case 72:
bHaveBulges = atoi(szLineBuf);
break;
case 73:
bIsClosed = atoi(szLineBuf);
break;
case 10:
if( bHaveX && bHaveY )
{
oSmoothPolyline.AddPoint(dfX, dfY, 0.0, dfBulge);
dfBulge = 0.0;
bHaveY = FALSE;
}
dfX = CPLAtof(szLineBuf);
bHaveX = TRUE;
break;
case 20:
if( bHaveX && bHaveY )
{
oSmoothPolyline.AddPoint( dfX, dfY, 0.0, dfBulge );
dfBulge = 0.0;
bHaveX = bHaveY = FALSE;
}
dfY = CPLAtof(szLineBuf);
bHaveY = TRUE;
if( bHaveX && bHaveY && !bHaveBulges )
{
oSmoothPolyline.AddPoint( dfX, dfY, 0.0, dfBulge );
dfBulge = 0.0;
bHaveX = bHaveY = FALSE;
}
break;
case 42:
dfBulge = CPLAtof(szLineBuf);
if( bHaveX && bHaveY )
{
oSmoothPolyline.AddPoint( dfX, dfY, 0.0, dfBulge );
dfBulge = 0.0;
bHaveX = bHaveY = FALSE;
}
break;
default:
break;
}
}
if( nCode != 10 && nCode != 20 && nCode != 42 && nCode >= 0)
poDS->UnreadValue();
if( bHaveX && bHaveY )
oSmoothPolyline.AddPoint(dfX, dfY, 0.0, dfBulge);
if( bIsClosed )
oSmoothPolyline.Close();
poGC->addGeometryDirectly( oSmoothPolyline.Tesselate() );
/* -------------------------------------------------------------------- */
/* Skip through source boundary objects if present. */
/* -------------------------------------------------------------------- */
nCode = poDS->ReadValue(szLineBuf,sizeof(szLineBuf));
if( nCode != 97 )
{
if (nCode < 0)
return OGRERR_FAILURE;
poDS->UnreadValue();
}
else
{
int iObj, nObjCount = atoi(szLineBuf);
for( iObj = 0; iObj < nObjCount; iObj++ )
{
if (poDS->ReadValue( szLineBuf, sizeof(szLineBuf) ) < 0)
return OGRERR_FAILURE;
}
}
return OGRERR_NONE;
}
static OGRErr DWGCollectBoundaryLoop( OdDbHatchPtr poHatch, int iLoop,
OGRGeometryCollection *poGC )
{
int i;
/* -------------------------------------------------------------------- */
/* Handle simple polyline loops. */
/* -------------------------------------------------------------------- */
if( poHatch->loopTypeAt( iLoop ) & OdDbHatch::kPolyline )
{
DXFSmoothPolyline oSmoothPolyline;
OdGePoint2dArray vertices;
OdGeDoubleArray bulges;
poHatch->getLoopAt (iLoop, vertices, bulges);
for (i = 0; i < (int) vertices.size(); i++)
{
if( i >= (int) bulges.size() )
oSmoothPolyline.AddPoint( vertices[i].x, vertices[i].y, 0.0,
0.0 );
else
oSmoothPolyline.AddPoint( vertices[i].x, vertices[i].y, 0.0,
bulges[i] );
}
oSmoothPolyline.Close();
OGRLineString *poLS = (OGRLineString *) oSmoothPolyline.Tesselate();
poGC->addGeometryDirectly( poLS );
return OGRERR_NONE;
}
/* -------------------------------------------------------------------- */
/* Handle an edges array. */
/* -------------------------------------------------------------------- */
EdgeArray oEdges;
poHatch->getLoopAt( iLoop, oEdges );
for( i = 0; i < (int) oEdges.size(); i++ )
{
OdGeCurve2d* poEdge = oEdges[i];
if( poEdge->type() == OdGe::kLineSeg2d )
{
OGRLineString *poLS = new OGRLineString();
OdGePoint2d oStart = poEdge->evalPoint(0.0);
OdGePoint2d oEnd = poEdge->evalPoint(1.0);
poLS->addPoint( oStart.x, oStart.y );
poLS->addPoint( oEnd.x, oEnd.y );
poGC->addGeometryDirectly( poLS );
}
else if( poEdge->type() == OdGe::kCircArc2d )
{
OdGeCircArc2d* poCircArc = (OdGeCircArc2d*) poEdge;
OdGePoint2d oCenter = poCircArc->center();
double dfStartAngle = poCircArc->startAng() * 180 / PI;
double dfEndAngle = poCircArc->endAng() * 180 / PI;
if( !poCircArc->isClockWise() )
{
dfStartAngle *= -1;
dfEndAngle *= -1;
}
else if( dfStartAngle > dfEndAngle )
{
dfEndAngle += 360.0;
}
OGRLineString *poLS = (OGRLineString *)
OGRGeometryFactory::approximateArcAngles(
oCenter.x, oCenter.y, 0.0,
poCircArc->radius(), poCircArc->radius(), 0.0,
dfStartAngle, dfEndAngle, 0.0 );
poGC->addGeometryDirectly( poLS );
}
else if( poEdge->type() == OdGe::kEllipArc2d )
{
OdGeEllipArc2d* poArc = (OdGeEllipArc2d*) poEdge;
OdGePoint2d oCenter = poArc->center();
double dfRatio = poArc->minorRadius() / poArc->majorRadius();
OdGeVector2d oMajorAxis = poArc->majorAxis();
double dfRotation;
double dfStartAng, dfEndAng;
dfRotation = -1 * atan2( oMajorAxis.y, oMajorAxis.x ) * 180 / PI;
dfStartAng = poArc->startAng()*180/PI;
dfEndAng = poArc->endAng()*180/PI;
if( !poArc->isClockWise() )
{
dfStartAng *= -1;
dfEndAng *= -1;
}
else if( dfStartAng > dfEndAng )
{
dfEndAng += 360.0;
}
OGRLineString *poLS = (OGRLineString *)
OGRGeometryFactory::approximateArcAngles(
oCenter.x, oCenter.y, 0.0,
poArc->majorRadius(), poArc->minorRadius(), dfRotation,
OGRDWGLayer::AngleCorrect(dfStartAng,dfRatio),
OGRDWGLayer::AngleCorrect(dfEndAng,dfRatio),
0.0 );
poGC->addGeometryDirectly( poLS );
}
else
CPLDebug( "DWG", "Unsupported edge type (%d) in hatch loop.",
(int) poEdge->type() );
//case OdGe::kNurbCurve2d : dumpNurbCurveEdge(indent + 1, pEdge);
}
return OGRERR_NONE;
}
OGRErr OGRDXFLayer::CollectPolylinePath( OGRGeometryCollection *poGC,
const double dfElevation )
{
int nCode = 0;
char szLineBuf[257];
DXFSmoothPolyline oSmoothPolyline;
double dfBulge = 0.0;
double dfX = 0.0;
double dfY = 0.0;
bool bHaveX = false;
bool bHaveY = false;
bool bIsClosed = false;
int nVertexCount = -1;
bool bHaveBulges = false;
/* -------------------------------------------------------------------- */
/* Read the boundary path type. */
/* -------------------------------------------------------------------- */
while( (nCode = poDS->ReadValue(szLineBuf,sizeof(szLineBuf))) > 0 )
{
if( nVertexCount > 0 && (int) oSmoothPolyline.size() == nVertexCount )
break;
switch( nCode )
{
case 93:
nVertexCount = atoi(szLineBuf);
break;
case 72:
bHaveBulges = CPL_TO_BOOL(atoi(szLineBuf));
break;
case 73:
bIsClosed = CPL_TO_BOOL(atoi(szLineBuf));
break;
case 10:
if( bHaveX && bHaveY )
{
oSmoothPolyline.AddPoint(dfX, dfY, dfElevation, dfBulge);
dfBulge = 0.0;
bHaveY = false;
}
dfX = CPLAtof(szLineBuf);
bHaveX = true;
break;
case 20:
if( bHaveX && bHaveY )
{
oSmoothPolyline.AddPoint( dfX, dfY, dfElevation, dfBulge );
dfBulge = 0.0;
bHaveX = false;
}
dfY = CPLAtof(szLineBuf);
bHaveY = true;
if( bHaveX && bHaveY && !bHaveBulges )
{
oSmoothPolyline.AddPoint( dfX, dfY, dfElevation, dfBulge );
dfBulge = 0.0;
bHaveX = false;
bHaveY = false;
}
break;
case 42:
dfBulge = CPLAtof(szLineBuf);
if( bHaveX && bHaveY )
{
oSmoothPolyline.AddPoint( dfX, dfY, dfElevation, dfBulge );
dfBulge = 0.0;
bHaveX = false;
bHaveY = false;
}
break;
default:
break;
}
}
if( nCode < 0 )
{
DXF_LAYER_READER_ERROR();
return OGRERR_FAILURE;
}
if( nCode != 10 && nCode != 20 && nCode != 42 )
poDS->UnreadValue();
if( bHaveX && bHaveY )
oSmoothPolyline.AddPoint(dfX, dfY, dfElevation, dfBulge);
if( bIsClosed )
oSmoothPolyline.Close();
if(oSmoothPolyline.IsEmpty())
{
return OGRERR_FAILURE;
}
poGC->addGeometryDirectly( oSmoothPolyline.Tesselate() );
/* -------------------------------------------------------------------- */
/* Skip through source boundary objects if present. */
/* -------------------------------------------------------------------- */
nCode = poDS->ReadValue(szLineBuf,sizeof(szLineBuf));
if( nCode != 97 )
{
if (nCode < 0)
return OGRERR_FAILURE;
poDS->UnreadValue();
}
else
{
int iObj, nObjCount = atoi(szLineBuf);
for( iObj = 0; iObj < nObjCount; iObj++ )
{
if (poDS->ReadValue( szLineBuf, sizeof(szLineBuf) ) < 0)
return OGRERR_FAILURE;
}
}
return OGRERR_NONE;
}