//---------------------------------------------------------
bool CShapes_Buffer::Get_Buffer_Points(CSG_Shape *pPoints, CSG_Shape *pBuffer, double Distance)
{
CSG_Shapes Part(SHAPE_TYPE_Polygon);
CSG_Shape *pPart = Part.Add_Shape();
for(int iPart=0; iPart<pPoints->Get_Part_Count(); iPart++)
{
for(int iPoint=0; iPoint<pPoints->Get_Point_Count(iPart); iPoint++)
{
if( pBuffer->Get_Part_Count() == 0 )
{
Add_Arc(pBuffer, pPoints->Get_Point(iPoint), Distance, 0.0, M_PI_360);
}
else
{
Add_Arc(pPart , pPoints->Get_Point(iPoint), Distance, 0.0, M_PI_360);
SG_Polygon_Union(pBuffer, pPart);
pPart->Del_Parts();
}
}
}
return( true );
}
//---------------------------------------------------------
bool CShapes_Buffer::Get_Buffers(CSG_Shapes *pShapes, int Field, CSG_Shapes *pBuffers, double Scale, bool bDissolve)
{
//-----------------------------------------------------
double Distance;
CSG_Shapes Part(SHAPE_TYPE_Polygon);
CSG_Shape *pPart = Part.Add_Shape(), *pBuffer;
Distance = Parameters("DIST_FIELD")->asDouble() * Scale;
Scale = Parameters("DIST_SCALE")->asDouble() * Scale;
if( !bDissolve )
{
pBuffers->Create(SHAPE_TYPE_Polygon, CSG_String::Format(SG_T("%s [%s]"), pShapes->Get_Name(), _TL("Buffer")), pShapes);
}
else
{
pBuffers->Create(SHAPE_TYPE_Polygon, CSG_String::Format(SG_T("%s [%s]"), pShapes->Get_Name(), _TL("Buffer")));
pBuffers->Add_Field(_TL("ID"), SG_DATATYPE_Int);
pBuffer = pBuffers->Add_Shape();
}
//-----------------------------------------------------
for(int iShape=0; iShape<pShapes->Get_Count() && Set_Progress(iShape, pShapes->Get_Count()); iShape++)
{
CSG_Shape *pShape = pShapes->Get_Shape(iShape);
if( Field < 0 || (Distance = Scale * pShape->asDouble(Field)) > 0.0 )
{
if( !bDissolve )
{
pBuffer = pBuffers->Add_Shape(pShape, SHAPE_COPY_ATTR);
}
if( pBuffer->Get_Part_Count() == 0 )
{
Get_Buffer(pShape, pBuffer, Distance);
}
else
{
Get_Buffer(pShape, pPart , Distance);
SG_Polygon_Union(pBuffer, pPart);
pPart->Del_Parts();
}
}
}
//-----------------------------------------------------
return( pBuffers->is_Valid() );
}
//---------------------------------------------------------
bool CSG_Network::Add_Shape(CSG_Shape *pShape)
{
if( !pShape || !pShape->is_Valid() )
{
return( false );
}
//-----------------------------------------------------
CSG_Shapes Part(SHAPE_TYPE_Line);
CSG_Shape *pPart = Part.Add_Shape();
for(int iPart=0; iPart<pShape->Get_Part_Count(); iPart++)
{
if( pShape->Get_Point_Count(iPart) > 1 )
{
bool bAscending = pShape->Get_Type() != SHAPE_TYPE_Polygon
|| ((CSG_Shape_Polygon *)pShape)->is_Lake(iPart) != ((CSG_Shape_Polygon *)pShape)->is_Clockwise(iPart);
CSG_Point q, p = pShape->Get_Point(0, iPart, bAscending);
pPart->Add_Point(p);
for(int iPoint=1; iPoint<pShape->Get_Point_Count(iPart); iPoint++)
{
if( !p.is_Equal(q = pShape->Get_Point(iPoint, iPart, bAscending)) )
{
p = q;
pPart->Add_Point(p);
}
}
if( pPart->Get_Point_Count(0) > 1 )
{
_Add_Line(pPart, pShape->Get_Type());
}
pPart->Del_Parts();
}
}
return( true );
}
