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@ -36,6 +36,8 @@ std::vector<Point> produce_cellmap(HeightMap* heightmap, float z)
} }
std::vector<std::vector<Point>> vector_cellmap(HeightMap* heightmap, int interval) std::vector<std::vector<Point>> vector_cellmap(HeightMap* heightmap, int interval)
{ {
int num_contours = (heightmap->max - heightmap->min)/interval; int num_contours = (heightmap->max - heightmap->min)/interval;
@ -48,9 +50,44 @@ std::vector<std::vector<Point>> vector_cellmap(HeightMap* heightmap, int interva
#pragma omp for #pragma omp for
for (int i = 1; i <= num_contours; i++) for (int i = 1; i <= num_contours; i++)
{ {
vec_private.push_back(produce_cellmap(heightmap, heightmap->min + interval*i)); auto points = produce_cellmap(heightmap, heightmap->min + interval*i) ;
std::vector<Point> line;
line.push_back(points.back());
points.pop_back();
while (points.size() != 0){
Point current_point = points.back();
for (int j=0; j < points.size(); j++){
Point next = points[j];
if (&next != &points.back()) {
if (next.x +1 == current_point.x) {
line.push_back(next);
points.erase(points.begin()+j);
}
else if (next.x -1 == current_point.x) {
line.push_back(next);
points.erase(points.begin()+j);
}
else if (next.y +1 == current_point.y) {
line.push_back(next);
points.erase(points.begin()+j);
}
else if (next.y -1 == current_point.y) {
line.push_back(next);
points.erase(points.begin()+j);
}
else {
vec_private.push_back(line);
std::vector<Point> line;
line.push_back(points.back());
points.pop_back();
}
}
}
}
} }
#pragma omp critical #pragma omp critical
vector_contours.insert(vector_contours.end(), vec_private.begin(), vec_private.end()); vector_contours.insert(vector_contours.end(), vec_private.begin(), vec_private.end());
} }
@ -86,7 +123,7 @@ constexpr std::tuple<double, double, double, double> marching_squares_lookup(int
case 14: return {0, 0.5, 0.5, 0}; case 14: return {0, 0.5, 0.5, 0};
}; };
} }
void write_output_file(std::vector<CellMap> cellmaps, const char *filepath) void write_output_file(std::vector<std::vector<Point>> all_points, const char *filepath, HeightMap* heightmap)
{ {
const char *pszDriverName = "GeoJSON"; const char *pszDriverName = "GeoJSON";
@ -112,7 +149,7 @@ void write_output_file(std::vector<CellMap> cellmaps, const char *filepath)
OGRLayer *poLayer; OGRLayer *poLayer;
poLayer = poDS->CreateLayer( "contours", &(cellmaps[0]).reference_system, wkbLineString, NULL ); poLayer = poDS->CreateLayer( "contours", /*&(cellmaps[0]).reference_system*/ NULL, wkbLineString, NULL );
if( poLayer == NULL ) if( poLayer == NULL )
{ {
printf( "Layer creation failed.\n" ); printf( "Layer creation failed.\n" );
@ -128,42 +165,51 @@ void write_output_file(std::vector<CellMap> cellmaps, const char *filepath)
printf( "Creating Name field failed.\n" ); printf( "Creating Name field failed.\n" );
exit( 1 ); exit( 1 );
} }
for (int j = 0; j < cellmaps.size(); j++) int width = heightmap->width -1;
int height = heightmap->height -1;
int size = width * height;
for (int j = 0; j < all_points.size(); j++)
{ {
CellMap* cellmap = &cellmaps[j]; OGRFeature *feature;
OGRLineString *geometry = new OGRLineString();
feature = OGRFeature::CreateFeature( poLayer->GetLayerDefn() );
feature->SetField( "Name", j );
for (int i = 0; i < cellmap->height*cellmap->width; i++)
std::vector<Point> points = all_points[j];
for (int i = 0; i < points.size(); i++)
{ {
if (*(cellmap->cells + i) != 0 && *(cellmap->cells + i) != 15)
{
OGRFeature *feature;
OGRLineString *geometry = new OGRLineString();
feature = OGRFeature::CreateFeature( poLayer->GetLayerDefn() );
feature->SetField( "Name", j );
int x_raw = i%cellmap->width;
int y_raw = i/cellmap->width;
auto [x, y] = local_to_projected(cellmap->geotransform, x_raw, y_raw);
auto [x_bl, y_bl, x_tr, y_tr] = marching_squares_lookup(*(cellmap->cells + i) );
//std::cout << x << ", " << y << " ";
geometry->setPoint( geometry->getNumPoints(), x+x_tr*0.25, y+y_tr*0.25 );
geometry->setPoint( geometry->getNumPoints(), x+x_bl*0.25, y+y_bl*0.25 );
if ( feature->SetGeometry(geometry) != OGRERR_NONE) //int x_raw = i%width;
{ //int y_raw = i/height;
printf( "Failed to set geometry.\n" ); int x_raw = points[i].x;
exit( 1 ); int y_raw = points[i].y;
} auto [x, y] = local_to_projected(heightmap->geotransform, x_raw, y_raw);
OGRGeometryFactory::destroyGeometry(geometry); //auto [x_bl, y_bl, x_tr, y_tr] = marching_squares_lookup(*(cellmap->cells + i) );
if( poLayer->CreateFeature( feature ) != OGRERR_NONE ) //std::cout << x << ", " << y << " ";
{ //geometry->setPoint( geometry->getNumPoints(), x+x_tr*0.25, y+y_tr*0.25 );
printf( "Failed to create feature in shapefile.\n" ); //geometry->setPoint( geometry->getNumPoints(), x+x_bl*0.25, y+y_bl*0.25 );
exit( 1 ); geometry->setPoint(geometry->getNumPoints(),x ,y );
}
OGRFeature::DestroyFeature( feature );
}
} }
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 );
} }
@ -184,5 +230,5 @@ int main(int argc, const char* argv[])
auto cellmap = produce_cellmap(&map, 40); auto cellmap = produce_cellmap(&map, 40);
auto cellmaps = vector_cellmap(&map, 5); auto cellmaps = vector_cellmap(&map, 5);
//write_output_file(cellmaps, "out.geojson"); write_output_file(cellmaps, "out.geojson", &map);
} }