From ee0b87c2b3494f5c9d1b330445369eb064429f06 Mon Sep 17 00:00:00 2001
From: Trygve <trygve@posteo.net>
Date: Fri, 26 Apr 2024 15:40:09 +0200
Subject: [PATCH] Start to implement line drawing

---
 src/main.cpp | 59 +++++++++++++++++++++++++++-------------------------
 1 file changed, 31 insertions(+), 28 deletions(-)

diff --git a/src/main.cpp b/src/main.cpp
index 23826ca..486af9e 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -1,6 +1,9 @@
 #include "contour_creator.hh"
 #include <gdal/ogr_api.h>
 #include "ogrsf_frmts.h"
+#include <gdal/ogr_core.h>
+#include <gdal/ogr_feature.h>
+#include <gdal/ogr_geometry.h>
 #include <iostream>
 #include <ostream>
 #include <vector>
@@ -86,7 +89,7 @@ void write_output_file(std::vector<CellMap> cellmaps, const char *filepath)
 
     OGRLayer *poLayer;
 
-    poLayer = poDS->CreateLayer( "contours", &(cellmaps[0]).reference_system, wkbPoint, NULL );
+    poLayer = poDS->CreateLayer( "contours", &(cellmaps[0]).reference_system, wkbLineString, NULL );
     if( poLayer == NULL )
     {
         printf( "Layer creation failed.\n" );
@@ -105,41 +108,41 @@ void write_output_file(std::vector<CellMap> cellmaps, const char *filepath)
     for (int j = 0; j < cellmaps.size(); j++)
     {
         CellMap* cellmap = &cellmaps[j];
-        for (int i = 0; i<cellmap->height*cellmap->width; i++) {
+        OGRFeature *feature;
+        OGRLineString *geometry;
+        feature = OGRFeature::CreateFeature( poLayer->GetLayerDefn() );
+        feature->SetField( "Name", j );
+        for (int i = 0; i < cellmap->height*cellmap->width; i++) 
+        {
             if (*(cellmap->cells + i) != 0 && *(cellmap->cells + i) != 15)
             {
-                OGRFeature *poFeature;
-                poFeature = OGRFeature::CreateFeature( poLayer->GetLayerDefn() );
-                poFeature->SetField( "Name", *(cellmap->cells + i) );
-
-                //OGRSpatialReference local;
-
-                //auto poCT = OGRCreateCoordinateTransformation( &local, &cellmap->reference_system );
-                
-                /*
-                if( poCT == NULL || !poCT->Transform( 1, &x, &y ) )
-                    printf( "Transformation failed.\n" );
-                */
-                OGRPoint pt;
-
                 int x_raw = i%cellmap->width;
                 int y_raw = i/cellmap->width;
+
+                std::cout << "🤬"; std::cout.flush();
+
+
                 auto [x, y] = local_to_projected(cellmap->geotransform, x_raw, y_raw);
+                
 
-                pt.setX( x );
-                pt.setY( y );
-
-                poFeature->SetGeometry( &pt );
-
-                if( poLayer->CreateFeature( poFeature ) != OGRERR_NONE )
-                {
-                    printf( "Failed to create feature in shapefile.\n" );
-                    exit( 1 );
-                }
-
-                OGRFeature::DestroyFeature( poFeature );
+                geometry->setPoint( i, x, y );
+                
             }
+            
         }
+        
+        if ( feature->SetGeometry(geometry) != OGRERR_NONE)
+        {
+            printf( "Failed to set geometry.\n" );
+            exit( 1 );
+        }
+        OGRGeometryFactory::destroyGeometry(geometry);
+        if( poLayer->CreateFeature( feature ) != OGRERR_NONE )
+        {
+            printf( "Failed to create feature in shapefile.\n" );
+            exit( 1 );
+        }
+        OGRFeature::DestroyFeature( feature );
     }
 
     GDALClose( poDS );