Port from julia version instead

src/player.rs

@@ -1,44 +1,35 @@
-use crate::{Gaussian, BETA, GAMMA, N_INF};
-
-#[derive(Copy, Clone, Debug, Default, PartialEq, PartialOrd, Eq, Ord, Hash)]
-pub struct PlayerIndex(usize);
-
-impl PlayerIndex {
-    pub fn new(index: usize) -> Self {
-        Self(index)
-    }
-}
+use crate::{gaussian::Gaussian, BETA, GAMMA, N_INF};
 
 #[derive(Clone, Copy, Debug)]
 pub struct Player {
-    pub prior: Gaussian,
-    pub beta: f64,
-    pub gamma: f64,
-    pub draw: Gaussian,
+    pub(crate) prior: Gaussian,
+    pub(crate) beta: f64,
+    pub(crate) gamma: f64,
+    pub(crate) draw: Gaussian,
 }
 
 impl Player {
-    pub fn new(prior: Gaussian, beta: f64, gamma: f64, draw: Gaussian) -> Self {
-        Player {
+    pub fn new(prior: Gaussian, beta: f64, gamma: f64) -> Self {
+        Self {
             prior,
             beta,
             gamma,
-            draw,
+            draw: N_INF,
         }
     }
-}
 
-impl Player {
-    pub fn performance(&self) -> Gaussian {
-        Gaussian::new(
-            self.prior.mu(),
-            (self.prior.sigma().powi(2) + self.beta.powi(2)).sqrt(),
-        )
+    pub(crate) fn performance(&self) -> Gaussian {
+        self.prior.forget(self.beta, 1)
     }
 }
 
 impl Default for Player {
     fn default() -> Self {
-        Player::new(Gaussian::default(), BETA, GAMMA, N_INF)
+        Self {
+            prior: Gaussian::default(),
+            beta: BETA,
+            gamma: GAMMA,
+            draw: N_INF,
+        }
     }
 }