Improve build instructions

2 files changed, 5 insertions, 2 deletions

diff --git a/src/fluid_buffer.cc b/src/fluid_buffer.cc
index 1f40d2f..9291fdd 100644
--- a/src/fluid_buffer.cc
+++ b/src/fluid_buffer.cc
@@ -32,7 +32,9 @@ Velocity& FluidBuffer::velocity(Vector<std::size_t> pos) {
 	return velocity(pos[0], pos[1]);
 }
 
-void FluidBuffer::writeAsVTK(const std::string& path) {
+void FluidBuffer::writeAsVTK(const std::filesystem::path& path) {
+	std::filesystem::create_directories(path.parent_path());
+
 	std::ofstream fout;
 	fout.open(path.c_str());
 
diff --git a/src/fluid_buffer.h b/src/fluid_buffer.h
index 72518bb..b0e0936 100644
--- a/src/fluid_buffer.h
+++ b/src/fluid_buffer.h
@@ -2,6 +2,7 @@
 
 #include <memory>
 #include <string>
+#include <filesystem>
 
 #include "vector.h"
 
@@ -28,5 +29,5 @@ public:
 	Velocity& velocity(std::size_t x, std::size_t y);
 	Velocity& velocity(Vector<std::size_t> pos);
 
-	void writeAsVTK(const std::string& path);
+	void writeAsVTK(const std::filesystem::path& path);
 };