mirror of
https://gitlab.com/Trygve/contour-creator.git
synced 2024-09-28 20:05:17 +00:00
Seperate line creation so it can be paralized
This commit is contained in:
parent
77467594bd
commit
e07ab1445a
205
src/main.cpp
205
src/main.cpp
@ -36,55 +36,6 @@ std::vector<Point> produce_cellmap(HeightMap* heightmap, float z)
|
||||
|
||||
|
||||
}
|
||||
|
||||
|
||||
|
||||
std::vector<std::vector<Point>> vector_cellmap(HeightMap* heightmap, int interval)
|
||||
{
|
||||
int num_contours = (heightmap->max - heightmap->min)/interval;
|
||||
std::vector<std::vector<Point>> vector_contours;
|
||||
omp_set_num_threads(12);
|
||||
|
||||
#pragma omp parallel
|
||||
{
|
||||
std::vector<std::vector<Point>> vec_private;
|
||||
#pragma omp for
|
||||
for (int i = 1; i <= num_contours; i++)
|
||||
{
|
||||
auto points = produce_cellmap(heightmap, heightmap->min + interval*i);
|
||||
|
||||
|
||||
for (int j = 0; j < points.size(); j++){
|
||||
Point current = points[j];
|
||||
//std::cout << points_allocated << " " << points.size() << "\n";
|
||||
for (int k = 0; k < points.size(); k++){
|
||||
Point candidate = points[k];
|
||||
if (candidate.next != nullptr) {
|
||||
if (candidate.x +1 == current.x) {
|
||||
current.next = &candidate;
|
||||
}
|
||||
else if (candidate.x -1 == current.x) {
|
||||
current.next = &candidate;
|
||||
}
|
||||
else if (candidate.y +1 == current.x) {
|
||||
current.next = &candidate;
|
||||
}
|
||||
else if (candidate.y -1 == current.x) {
|
||||
current.next = &candidate;
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
#pragma omp critical
|
||||
|
||||
vector_contours.insert(vector_contours.end(), vec_private.begin(), vec_private.end());
|
||||
|
||||
}
|
||||
return vector_contours;
|
||||
}
|
||||
|
||||
std::tuple<double, double> local_to_projected(double* geotransform, int x, int y)
|
||||
{
|
||||
return {
|
||||
@ -94,6 +45,116 @@ std::tuple<double, double> local_to_projected(double* geotransform, int x, int y
|
||||
geotransform[4] * 0.5 + geotransform[5] * 0.5 + geotransform[3]
|
||||
};
|
||||
}
|
||||
std::vector<OGRFeature*> create_contours(OGRFeatureDefn* layer_def, std::vector<Point> points, HeightMap* heightmap)
|
||||
{
|
||||
std::vector<OGRFeature*> lines;
|
||||
for (int i = 0; i<points.size();i++)
|
||||
{
|
||||
OGRFeature *feature;
|
||||
OGRLineString *geometry = new OGRLineString();
|
||||
|
||||
feature = OGRFeature::CreateFeature(layer_def);
|
||||
feature->SetField( "Name", i );
|
||||
Point* current = &points[0];
|
||||
int points_delegated = 0;
|
||||
while (points_delegated < points.size())
|
||||
{
|
||||
//int x_raw = i%width;
|
||||
//int y_raw = i/height;
|
||||
int x_raw = current->x;
|
||||
int y_raw = current->y;
|
||||
auto [x, y] = local_to_projected(heightmap->geotransform, x_raw, y_raw);
|
||||
//std::cout << x << ", " << y << " ";
|
||||
//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 );
|
||||
geometry->setPoint(geometry->getNumPoints(),x ,y );
|
||||
points_delegated++;
|
||||
current = current->next;
|
||||
if (current == nullptr)
|
||||
{
|
||||
for (int k = 0; k < points.size(); k++)
|
||||
{
|
||||
if (points[k].previous == nullptr)
|
||||
{
|
||||
current = &points[k];
|
||||
}
|
||||
}
|
||||
if (current == nullptr)
|
||||
{
|
||||
break;
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
if ( feature->SetGeometry(geometry) != OGRERR_NONE)
|
||||
{
|
||||
printf( "Failed to set geometry.\n" );
|
||||
exit( 1 );
|
||||
}
|
||||
OGRGeometryFactory::destroyGeometry(geometry);
|
||||
lines.push_back(feature);
|
||||
}
|
||||
|
||||
}
|
||||
|
||||
std::vector<OGRFeature*> vector_cellmap(OGRFeatureDefn* layer_def, HeightMap* heightmap, int interval)
|
||||
{
|
||||
int num_contours = (heightmap->max - heightmap->min)/interval;
|
||||
std::vector<OGRFeature*> vector_contours;
|
||||
omp_set_num_threads(12);
|
||||
|
||||
#pragma omp parallel
|
||||
{
|
||||
std::vector<OGRFeature*> lines;
|
||||
#pragma omp for
|
||||
for (int i = 1; i <= num_contours; i++)
|
||||
{
|
||||
auto points = produce_cellmap(heightmap, heightmap->min + interval*i);
|
||||
|
||||
|
||||
for (int j = 0; j < points.size(); j++){
|
||||
Point* current = &points[j];
|
||||
//std::cout << points_allocated << " " << points.size() << "\n";
|
||||
for (int k = 0; k < points.size(); k++){
|
||||
Point* candidate = &points[k];
|
||||
if (candidate->previous == nullptr) {
|
||||
|
||||
if (candidate->x +1 == current->x && candidate->y == current->y) {
|
||||
current->next = candidate;
|
||||
candidate->previous = current;
|
||||
}
|
||||
else if (candidate->x -1 == current->x && candidate->y == current->y) {
|
||||
current->next = candidate;
|
||||
candidate->previous = current;
|
||||
}
|
||||
else if (candidate->y +1 == current->y && candidate->x == current->x) {
|
||||
current->next = candidate;
|
||||
candidate->previous = current;
|
||||
}
|
||||
else if (candidate->y -1 == current->y && candidate->x == current->x) {
|
||||
current->next = candidate;
|
||||
candidate->previous = current;
|
||||
}
|
||||
|
||||
}
|
||||
}
|
||||
}
|
||||
auto lines = create_lines(layer_def, points, heightmap);
|
||||
|
||||
}
|
||||
|
||||
#pragma omp critical
|
||||
|
||||
vector_contours.insert(vector_contours.end(), lines.begin(), lines.end());
|
||||
|
||||
}
|
||||
return vector_contours;
|
||||
}
|
||||
|
||||
|
||||
|
||||
constexpr std::tuple<double, double, double, double> marching_squares_lookup(int mcase)
|
||||
{
|
||||
@ -114,7 +175,9 @@ constexpr std::tuple<double, double, double, double> marching_squares_lookup(int
|
||||
case 14: return {0, 0.5, 0.5, 0};
|
||||
};
|
||||
}
|
||||
void write_output_file(std::vector<std::vector<Point>> all_points, const char *filepath, HeightMap* heightmap)
|
||||
|
||||
|
||||
void write_output_file(const char *filepath, HeightMap* heightmap)
|
||||
{
|
||||
|
||||
const char *pszDriverName = "GeoJSON";
|
||||
@ -160,47 +223,19 @@ void write_output_file(std::vector<std::vector<Point>> all_points, const char *f
|
||||
int height = heightmap->height -1;
|
||||
int size = width * height;
|
||||
|
||||
for (int j = 0; j < all_points.size(); j++)
|
||||
{
|
||||
OGRFeature *feature;
|
||||
OGRLineString *geometry = new OGRLineString();
|
||||
feature = OGRFeature::CreateFeature( poLayer->GetLayerDefn() );
|
||||
feature->SetField( "Name", j );
|
||||
// gets the lines from the heightmap. Runs the actual algorithm
|
||||
auto lines = create_contours(poLayer->GetLayerDefn(), heightmap, 5);
|
||||
|
||||
|
||||
std::vector<Point> points = all_points[j];
|
||||
|
||||
for (int i = 0; i < points.size(); i++)
|
||||
for (int j = 0; j < lines.size(); j++)
|
||||
{
|
||||
|
||||
//int x_raw = i%width;
|
||||
//int y_raw = i/height;
|
||||
int x_raw = points[i].x;
|
||||
int y_raw = points[i].y;
|
||||
auto [x, y] = local_to_projected(heightmap->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 );
|
||||
geometry->setPoint(geometry->getNumPoints(),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 )
|
||||
if( poLayer->CreateFeature( lines[j] ) != OGRERR_NONE )
|
||||
{
|
||||
printf( "Failed to create feature in shapefile.\n" );
|
||||
exit( 1 );
|
||||
}
|
||||
OGRFeature::DestroyFeature( feature );
|
||||
OGRFeature::DestroyFeature( lines[j] );
|
||||
|
||||
|
||||
}
|
||||
@ -220,6 +255,6 @@ int main(int argc, const char* argv[])
|
||||
|
||||
auto cellmap = produce_cellmap(&map, 40);
|
||||
|
||||
auto cellmaps = vector_cellmap(&map, 5);
|
||||
write_output_file(cellmaps, "out.geojson", &map);
|
||||
|
||||
write_output_file("out.geojson", &map);
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user