OGRFeature *OGRDXFLayer::TranslateHATCH()
{
char szLineBuf[257];
int nCode;
OGRFeature *poFeature = new OGRFeature( poFeatureDefn );
CPLString osHatchPattern;
int nFillFlag = 0;
OGRGeometryCollection oGC;
while( (nCode = poDS->ReadValue(szLineBuf,sizeof(szLineBuf))) > 0 )
{
switch( nCode )
{
case 70:
nFillFlag = atoi(szLineBuf);
break;
case 2:
osHatchPattern = szLineBuf;
poFeature->SetField( "Text", osHatchPattern.c_str() );
break;
case 91:
{
int nBoundaryPathCount = atoi(szLineBuf);
int iBoundary;
for( iBoundary = 0; iBoundary < nBoundaryPathCount; iBoundary++ )
{
CollectBoundaryPath( &oGC );
}
}
break;
default:
TranslateGenericProperty( poFeature, nCode, szLineBuf );
break;
}
}
if( nCode == 0 )
poDS->UnreadValue();
/* -------------------------------------------------------------------- */
/* Try to turn the set of lines into something useful. */
/* -------------------------------------------------------------------- */
OGRErr eErr;
OGRGeometryH hFinalGeom =
OGRBuildPolygonFromEdges( (OGRGeometryH) &oGC,
TRUE, TRUE, 0.0000001, &eErr );
poFeature->SetGeometryDirectly( (OGRGeometry *) hFinalGeom );
/* -------------------------------------------------------------------- */
/* We ought to try and make some useful translation of the fill */
/* style but I'll leave that for another time. */
/* -------------------------------------------------------------------- */
return poFeature;
}
OGRFeature *OGRDXFLayer::TranslateHATCH()
{
char szLineBuf[257];
int nCode;
OGRFeature *poFeature = new OGRFeature( poFeatureDefn );
CPLString osHatchPattern;
int nFillFlag = 0;
OGRGeometryCollection oGC;
while( (nCode = poDS->ReadValue(szLineBuf,sizeof(szLineBuf))) > 0 )
{
switch( nCode )
{
case 70:
nFillFlag = atoi(szLineBuf);
break;
case 2:
osHatchPattern = szLineBuf;
poFeature->SetField( "Text", osHatchPattern.c_str() );
break;
case 91:
{
int nBoundaryPathCount = atoi(szLineBuf);
int iBoundary;
for( iBoundary = 0; iBoundary < nBoundaryPathCount; iBoundary++ )
{
if (CollectBoundaryPath( &oGC ) != OGRERR_NONE)
break;
}
}
break;
default:
TranslateGenericProperty( poFeature, nCode, szLineBuf );
break;
}
}
if( nCode == 0 )
poDS->UnreadValue();
/* -------------------------------------------------------------------- */
/* Try to turn the set of lines into something useful. */
/* -------------------------------------------------------------------- */
OGRErr eErr;
OGRGeometry* poFinalGeom = (OGRGeometry *)
OGRBuildPolygonFromEdges( (OGRGeometryH) &oGC,
TRUE, TRUE, 0.0000001, &eErr );
if( eErr != OGRERR_NONE )
{
delete poFinalGeom;
OGRMultiLineString* poMLS = new OGRMultiLineString();
for(int i=0;i<oGC.getNumGeometries();i++)
poMLS->addGeometry(oGC.getGeometryRef(i));
poFinalGeom = poMLS;
}
ApplyOCSTransformer( poFinalGeom );
poFeature->SetGeometryDirectly( poFinalGeom );
/* -------------------------------------------------------------------- */
/* Work out the color for this feature. For now we just assume */
/* solid fill. We cannot trivially translate the various sorts */
/* of hatching. */
/* -------------------------------------------------------------------- */
CPLString osLayer = poFeature->GetFieldAsString("Layer");
int nColor = 256;
if( oStyleProperties.count("Color") > 0 )
nColor = atoi(oStyleProperties["Color"]);
// Use layer color?
if( nColor < 1 || nColor > 255 )
{
const char *pszValue = poDS->LookupLayerProperty( osLayer, "Color" );
if( pszValue != NULL )
nColor = atoi(pszValue);
}
/* -------------------------------------------------------------------- */
/* Setup the style string. */
/* -------------------------------------------------------------------- */
if( nColor >= 1 && nColor <= 255 )
{
CPLString osStyle;
const unsigned char *pabyDXFColors = ACGetColorTable();
osStyle.Printf( "BRUSH(fc:#%02x%02x%02x)",
pabyDXFColors[nColor*3+0],
pabyDXFColors[nColor*3+1],
pabyDXFColors[nColor*3+2] );
poFeature->SetStyleString( osStyle );
}
return poFeature;
}
OGRDXFFeature *OGRDXFLayer::TranslateHATCH()
{
char szLineBuf[257];
int nCode = 0;
OGRDXFFeature *poFeature = new OGRDXFFeature( poFeatureDefn );
CPLString osHatchPattern;
double dfElevation = 0.0; // Z value to be used for EVERY point
/* int nFillFlag = 0; */
OGRGeometryCollection oGC;
while( (nCode = poDS->ReadValue(szLineBuf,sizeof(szLineBuf))) > 0 )
{
switch( nCode )
{
case 30:
// Constant elevation.
dfElevation = CPLAtof( szLineBuf );
break;
case 70:
/* nFillFlag = atoi(szLineBuf); */
break;
case 2:
osHatchPattern = szLineBuf;
poFeature->SetField( "Text", osHatchPattern.c_str() );
break;
case 91:
{
int nBoundaryPathCount = atoi(szLineBuf);
for( int iBoundary = 0;
iBoundary < nBoundaryPathCount;
iBoundary++ )
{
if (CollectBoundaryPath( &oGC, dfElevation ) != OGRERR_NONE)
break;
}
}
break;
default:
TranslateGenericProperty( poFeature, nCode, szLineBuf );
break;
}
}
if( nCode < 0 )
{
DXF_LAYER_READER_ERROR();
delete poFeature;
return nullptr;
}
if( nCode == 0 )
poDS->UnreadValue();
/* -------------------------------------------------------------------- */
/* Obtain a tolerance value used when building the polygon. */
/* -------------------------------------------------------------------- */
double dfTolerance = atof( CPLGetConfigOption( "DXF_HATCH_TOLERANCE", "-1" ) );
if( dfTolerance < 0 )
{
// If the configuration variable isn't set, compute the bounding box
// and work out a tolerance from that
OGREnvelope oEnvelope;
oGC.getEnvelope( &oEnvelope );
dfTolerance = std::max( oEnvelope.MaxX - oEnvelope.MinX,
oEnvelope.MaxY - oEnvelope.MinY ) * 1e-7;
}
/* -------------------------------------------------------------------- */
/* Try to turn the set of lines into something useful. */
/* -------------------------------------------------------------------- */
OGRErr eErr;
OGRGeometry* poFinalGeom = (OGRGeometry *)
OGRBuildPolygonFromEdges( (OGRGeometryH) &oGC,
TRUE, TRUE, dfTolerance, &eErr );
if( eErr != OGRERR_NONE )
{
delete poFinalGeom;
OGRMultiLineString* poMLS = new OGRMultiLineString();
for(int i=0;i<oGC.getNumGeometries();i++)
poMLS->addGeometry(oGC.getGeometryRef(i));
poFinalGeom = poMLS;
}
poFeature->ApplyOCSTransformer( poFinalGeom );
poFeature->SetGeometryDirectly( poFinalGeom );
PrepareBrushStyle( poFeature );
return poFeature;
}
