1 files changed, 27 insertions, 0 deletions
diff --git a/thirdparty/thekla_atlas/nvmath/Plane.cpp b/thirdparty/thekla_atlas/nvmath/Plane.cpp
new file mode 100644
index 0000000000..8b54f829ad
--- /dev/null
+++ b/thirdparty/thekla_atlas/nvmath/Plane.cpp
@@ -0,0 +1,27 @@
+// This code is in the public domain -- castanyo@yahoo.es
+
+#include "Plane.h"
+#include "Plane.inl"
+#include "Matrix.inl"
+
+namespace nv
+{
+    Plane transformPlane(const Matrix & m, const Plane & p)
+    {
+        Vector3 newVec = transformVector(m, p.vector());
+
+        Vector3 ptInPlane = p.offset() * p.vector();
+        ptInPlane = transformPoint(m, ptInPlane);
+
+        return Plane(newVec, ptInPlane);
+    }
+
+    Vector3 planeIntersection(const Plane & a, const Plane & b, const Plane & c)
+    {
+        return dot(a.vector(), cross(b.vector(), c.vector())) * (
+            a.offset() * cross(b.vector(), c.vector()) + 
+            c.offset() * cross(a.vector(), b.vector()) +
+            b.offset() * cross(c.vector(), a.vector()));
+    }
+
+} // nv namespace