From bd39a5f5bf71e10a73dafb98c5f8ec88aa3bc7fa Mon Sep 17 00:00:00 2001
From: tom barrett <spalf0@gmail.com>
Date: Tue, 27 Feb 2018 07:54:45 -0600
Subject: -added ability for ships to slow their velocity vector with one
 keypress

---
 src/astroid.rs    |  4 ++++
 src/connection.rs | 13 +++++++------
 src/mass.rs       |  1 +
 src/ship.rs       | 23 +++++++++++++++++++++++
 4 files changed, 35 insertions(+), 6 deletions(-)

diff --git a/src/astroid.rs b/src/astroid.rs
index fb14751..28009ca 100644
--- a/src/astroid.rs
+++ b/src/astroid.rs
@@ -44,6 +44,10 @@ impl Mass for Astroid {
         serde_json::to_string(self).unwrap()
     }
 
+    fn slow(&mut self) {
+
+    }
+
     fn process(&mut self) {
         self.position.0 += self.velocity.0;
         self.position.1 += self.velocity.1;
diff --git a/src/connection.rs b/src/connection.rs
index bcd4a30..8cf2a15 100644
--- a/src/connection.rs
+++ b/src/connection.rs
@@ -68,12 +68,13 @@ impl Connection {
                 let mut data = String::new();
                 match self.buff_r.read_line(&mut data) {
                     Ok(result) => match data.as_bytes() {
-                        b"5\n" => acceleration.0 += 1.0,
-                        b"0\n" => acceleration.0 -= 1.0,
-                        b"8\n" => acceleration.1 += 1.0,
-                        b"2\n" => acceleration.1 -= 1.0,
-                        b"4\n" => acceleration.2 += 1.0,
-                        b"6\n" => acceleration.2 -= 1.0,
+                        b"5\n" => acceleration.0 += 0.1,
+                        b"0\n" => acceleration.0 -= 0.1,
+                        b"8\n" => acceleration.1 += 0.1,
+                        b"2\n" => acceleration.1 -= 0.1,
+                        b"4\n" => acceleration.2 += 0.1,
+                        b"6\n" => acceleration.2 -= 0.1,
+                        b"-\n" => masses[self.index].slow(),
                         _ => {
                             if result == 0 {
                                 self.open = false;
diff --git a/src/mass.rs b/src/mass.rs
index d91b292..30442ec 100644
--- a/src/mass.rs
+++ b/src/mass.rs
@@ -5,6 +5,7 @@ pub trait Mass : Any {
     fn position(&self) -> (f64, f64, f64);
     fn serialize(&self) -> String;
     fn process(&mut self);
+    fn slow(&mut self);
     fn give_acceleration(&mut self, acceleration : (f64, f64, f64));
 }
 
diff --git a/src/ship.rs b/src/ship.rs
index 30c68d9..0ea97e0 100644
--- a/src/ship.rs
+++ b/src/ship.rs
@@ -39,6 +39,29 @@ impl Mass for Ship {
         serde_json::to_string(self).unwrap()
     }
 
+    fn slow(&mut self) {
+        if self.velocity.0 > 0.01 {
+            self.velocity.0 += -1.0 * self.velocity.0 * 0.1;
+        }
+        else {
+            self.velocity.0 = 0.0;
+        }
+
+        if self.velocity.1 > 0.01 {
+            self.velocity.1 += -1.0 * self.velocity.1 * 0.1;
+        }
+        else {
+            self.velocity.1 = 0.0;
+        }
+
+        if self.velocity.2 > 0.01 {
+            self.velocity.2 += -1.0 * self.velocity.2 * 0.1;
+        }
+        else {
+            self.velocity.2 = 0.0;
+        }
+    }
+
     fn process(&mut self) {
         self.position.0 += self.velocity.0;
         self.position.1 += self.velocity.1;
-- 
cgit v1.2.3