From: Tomas Wenström <tomas.wenstrom@gmail.com>
Date: Sun, 17 Jan 2021 17:58:49 +0000 (+0100)
Subject: Bolls bounce on walls
X-Git-Url: http://git.dolda2000.com/gitweb/?p=kaka%2Frust-sdl-test.git;a=commitdiff_plain;h=d34c324faf3016c49bfa53ad253f8b02920fa3bd

Bolls bounce on walls
---

diff --git a/src/core/game.rs b/src/core/game.rs
index f938245..8474fab 100644
--- a/src/core/game.rs
+++ b/src/core/game.rs
@@ -238,7 +238,7 @@ pub struct Boll {
 }
 
 impl Object for Boll {
-    fn update(&mut self, _objects: &mut Objects, lvl: &Level, _dt: Duration) -> ObjectState {
+    fn update(&mut self, objects: &mut Objects, lvl: &Level, _dt: Duration) -> ObjectState {
 	self.vel += lvl.gravity;
 	self.pos += self.vel;
 
@@ -252,6 +252,18 @@ impl Object for Boll {
 	    }
 	}
 
+	if self.pos.x <= 0.0 || self.pos.x >= 1280.0 { // only for testing
+	    self.pos.x = self.pos.x.max(0.0).min(1280.0);
+	    self.vel.x = -self.vel.x;
+	    self.bounces = 0;
+	    use rand::distributions::{Distribution, Normal};
+	    let normal = Normal::new(0.5, 0.4);
+	    objects.push(Box::new(Boll {
+		vel: self.vel * normal.sample(&mut rand::thread_rng()),
+		..*self
+	    }));
+	}
+
 	Alive
     }