WIP refactor plant_state

rust/src/util.rs

@@ -0,0 +1,10 @@
+
+pub trait LimitPrecision {
+    fn to_precision(self, presision: i32) -> self;
+}
+
+impl LimitPrecision for f32 {
+    fn to_precision(self, precision: i32) -> self {
+        (self * (10_f32).powi(precision)).round() / (10_f32).powi(precision)
+    }
+}