add method to Smoother

src/util.rs

@@ -42,6 +42,15 @@ impl Smoother {
         self.done = false;
     }
 
+    #[inline]
+    pub fn current(&self) -> f32 {
+        if self.done {
+            self.target
+        } else {
+            self.value
+        }
+    }
+
     #[inline]
     pub fn next(&mut self) -> f32 {
         //d// println!("NEXT: count={}, value={:6.3} inc={:6.4}",