Disable OpenMP for kNN and include missing headers

CMakeLists.txt

@@ -1,6 +1,7 @@
 cmake_minimum_required(VERSION 3.10.0)
 
 project(gc_polyscope_example)
+set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 
 # Check if Boost is installed on the system

deps/polyscope/include/polyscope/internal.h

@@ -3,6 +3,7 @@
 #pragma once
 
 #include <string>
+#include <cstdint>
 
 
 namespace polyscope {

modules/include/modules/knn-cpp/knncpp.h

@@ -530,7 +530,7 @@ namespace knncpp
             indices.setConstant(knn, queryPoints.cols(), -1);
             distances.setConstant(knn, queryPoints.cols(), -1);
 
-            #pragma omp parallel for num_threads(threads_)
+            //#pragma omp parallel for num_threads(threads_)
             for(Index i = 0; i < queryPoints.cols(); ++i)
             {
                 Index *idxPoint = &indices.data()[i * knn];
@@ -1216,7 +1216,7 @@ namespace knncpp
             Index *indicesRaw = indices.data();
             Scalar *distsRaw = distances.data();
 
-            #pragma omp parallel for num_threads(threads_)
+            //#pragma omp parallel for num_threads(threads_)
             for(Index i = 0; i < queryPoints.cols(); ++i)
             {
 
@@ -1461,7 +1461,7 @@ namespace knncpp
 
             Scalar maxDistPart = maxDist_ / buckets_.size();
 
-            #pragma omp parallel for num_threads(threads_)
+            //#pragma omp parallel for num_threads(threads_)
             for(Index c = 0; c < queryPoints.cols(); ++c)
             {
                 std::set<Index> candidates;
@@ -1674,7 +1674,7 @@ namespace knncpp
                 index_->knnSearch(queryPts, indicesF, distancesF, knn, searchParams_);
 
             // make result matrices compatible to API
-            #pragma omp parallel for num_threads(searchParams_.cores)
+            //#pragma omp parallel for num_threads(searchParams_.cores)
             for(Index i = 0; i < indices.cols(); ++i)
             {
                 bool found = false;

src/knot_untangling.cpp

@@ -25,6 +25,8 @@
 #include "polyscope/surface_mesh.h"
 
 #include <iostream>
+#include <chrono>
+#include <filesystem>
 
 #include <igl/triangle/triangulate.h>
 

src/main.cpp

@@ -23,6 +23,8 @@
 #include "polyscope/surface_mesh.h"
 
 #include <iostream>
+#include <chrono>
+#include <filesystem>
 
 #include <igl/triangle/triangulate.h>