diff -r 745c73e0e644 -r 165e43c3ed59 rust/integral-geometry/src/lib.rs
--- a/rust/integral-geometry/src/lib.rs	Tue Nov 06 17:00:35 2018 +0100
+++ b/rust/integral-geometry/src/lib.rs	Tue Nov 06 19:44:20 2018 +0300
@@ -98,9 +98,14 @@
     }
 
     #[inline]
-    pub fn to_fppoint(&self) -> FPPoint {
+    pub fn to_fppoint(self) -> FPPoint {
         FPPoint::new(self.x.into(), self.y.into())
     }
+
+    #[inline]
+    pub fn from_fppoint(p: &FPPoint) -> Self {
+        Self::new(p.x().round(), p.y().round())
+    }
 }
 
 #[derive(PartialEq, Eq, Clone, Copy, Debug)]