diff --git a/.gitmodules b/.gitmodules
index 8c7b45d2..f25e657c 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -52,3 +52,6 @@
 [submodule "modules/box2d"]
 	path = modules/box2d
 	url = https://github.com/erincatto/box2d
+[submodule "modules/pnpoly.h"]
+	path = modules/pnpoly.h
+	url = https://github.com/BlackMATov/pnpoly.h
diff --git a/modules/pnpoly.h b/modules/pnpoly.h
new file mode 160000
index 00000000..6a55491c
--- /dev/null
+++ b/modules/pnpoly.h
@@ -0,0 +1 @@
+Subproject commit 6a55491c4c791ea08404e5966e8e0104bf1b90c1
diff --git a/scripts/cloc_all.sh b/scripts/cloc_all.sh
index 866dfa4c..42b3bdee 100755
--- a/scripts/cloc_all.sh
+++ b/scripts/cloc_all.sh
@@ -16,5 +16,6 @@ cloc \
   $SCRIPT_DIR/../modules/enum.hpp/untests \
   $SCRIPT_DIR/../modules/flat.hpp/headers \
   $SCRIPT_DIR/../modules/flat.hpp/untests \
+  $SCRIPT_DIR/../modules/pnpoly.h \
   $SCRIPT_DIR/../modules/promise.hpp/headers \
   $SCRIPT_DIR/../modules/promise.hpp/untests
diff --git a/scripts/cloc_engine.sh b/scripts/cloc_engine.sh
index e7d31dbd..5d0c65dd 100755
--- a/scripts/cloc_engine.sh
+++ b/scripts/cloc_engine.sh
@@ -8,4 +8,5 @@ cloc \
   $SCRIPT_DIR/../modules/ecs.hpp/headers \
   $SCRIPT_DIR/../modules/enum.hpp/headers \
   $SCRIPT_DIR/../modules/flat.hpp/headers \
+  $SCRIPT_DIR/../modules/pnpoly.h \
   $SCRIPT_DIR/../modules/promise.hpp/headers
diff --git a/scripts/cloc_modules.sh b/scripts/cloc_modules.sh
index 7fba43c1..8567dd38 100755
--- a/scripts/cloc_modules.sh
+++ b/scripts/cloc_modules.sh
@@ -10,5 +10,6 @@ cloc \
   $SCRIPT_DIR/../modules/enum.hpp/untests \
   $SCRIPT_DIR/../modules/flat.hpp/headers \
   $SCRIPT_DIR/../modules/flat.hpp/untests \
+  $SCRIPT_DIR/../modules/pnpoly.h \
   $SCRIPT_DIR/../modules/promise.hpp/headers \
   $SCRIPT_DIR/../modules/promise.hpp/untests
diff --git a/scripts/update_modules.sh b/scripts/update_modules.sh
index b27ac858..4edb3649 100755
--- a/scripts/update_modules.sh
+++ b/scripts/update_modules.sh
@@ -105,6 +105,9 @@ cp -fv $MODULES_DIR/miniz/miniz_tinfl.h $SOURCES_RDPARTY_DIR/miniz/miniz_tinfl.h
 cp -fv $MODULES_DIR/miniz/miniz_zip.c $SOURCES_RDPARTY_DIR/miniz/miniz_zip.c
 cp -fv $MODULES_DIR/miniz/miniz_zip.h $SOURCES_RDPARTY_DIR/miniz/miniz_zip.h
 
+mkdir -p $SOURCES_RDPARTY_DIR/pnpoly.h
+cp -fv $MODULES_DIR/pnpoly.h/pnpoly.h $SOURCES_RDPARTY_DIR/pnpoly.h/pnpoly.h
+
 mkdir -p $HEADERS_RDPARTY_DIR/pugixml
 cp -rfv $MODULES_DIR/pugixml/src/. $HEADERS_RDPARTY_DIR/pugixml/
 
diff --git a/sources/3rdparty/pnpoly.h/pnpoly.h b/sources/3rdparty/pnpoly.h/pnpoly.h
new file mode 100644
index 00000000..a2d43e9c
--- /dev/null
+++ b/sources/3rdparty/pnpoly.h/pnpoly.h
@@ -0,0 +1,77 @@
+/*******************************************************************************
+ *
+ * PNPOLY_INCLUDE_H
+ *
+ ******************************************************************************/
+
+#ifndef PNPOLY_INCLUDE_H
+#define PNPOLY_INCLUDE_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef PNPOLY_DEF
+#  ifdef PNPOLY_STATIC
+#    define PNPOLY_DEF static
+#  else
+#    define PNPOLY_DEF extern
+#  endif
+#endif
+
+PNPOLY_DEF int pnpoly(int nvert, const float *vertx, const float *verty, float testx, float testy);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif // PNPOLY_INCLUDE_H
+
+/*******************************************************************************
+ *
+ * PNPOLY_IMPLEMENTATION
+ *
+ ******************************************************************************/
+
+#ifdef PNPOLY_IMPLEMENTATION
+
+PNPOLY_DEF int pnpoly(int nvert, const float *vertx, const float *verty, float testx, float testy)
+{
+  int i, j, c = 0;
+  for (i = 0, j = nvert-1; i < nvert; j = i++) {
+    if ( ((verty[i]>testy) != (verty[j]>testy)) &&
+         (testx < (vertx[j]-vertx[i]) * (testy-verty[i]) / (verty[j]-verty[i]) + vertx[i]) )
+       c = !c;
+  }
+  return c;
+}
+
+#endif // PNPOLY_IMPLEMENTATION
+
+/*
+Copyright (c) 1970-2003, Wm. Randolph Franklin
+Copyright (c) 2020, by Matvey Cherevko (blackmatov@gmail.com)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of
+this software and associated documentation files (the "Software"), to deal in
+the Software without restriction, including without limitation the rights to
+use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software is furnished to do
+so, subject to the following conditions:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimers.
+2. Redistributions in binary form must reproduce the above copyright notice in
+   the documentation and/or other materials provided with the distribution.
+3. The name of W. Randolph Franklin may not be used to endorse or promote
+   products derived from this Software without specific prior written permission.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+