# HG changeset patch
# User Simon Cross <hodgestar@gmail.com>
# Date 1301864717 -7200
# Node ID 60aa6c3eb96f4c0fad63a669fe1dff1b7df6b7e1
# Parent  64b135316b808f5d24ff1a38142a888fc71d24f1
Implement bounce factor.

diff -r 64b135316b80 -r 60aa6c3eb96f skaapsteker/physics.py
--- a/skaapsteker/physics.py	Sun Apr 03 22:59:09 2011 +0200
+++ b/skaapsteker/physics.py	Sun Apr 03 23:05:17 2011 +0200
@@ -15,6 +15,7 @@
     gravitates = True # whether gravity applies to the sprite
 
     terminal_velocity = (100.0, 100.0) # maximum horizontal and vertial speeds
+    bounce_factor = (0.9, 0.9) # bounce factor
 
     def __init__(self, *args, **kwargs):
         super(Sprite, self).__init__(*args, **kwargs)
@@ -60,8 +61,11 @@
         frac_x = clip.width / abs(v_x) if abs(v_x) > EPSILON else 0.0
         frac_y = clip.height / abs(v_y) if abs(v_y) > EPSILON else 0.0
         frac = max(frac_x, frac_y)
+        b_x = -v_x * self.bounce_factor[0] * immobile.bounce_factor[0]
+        b_y = -v_y * self.bounce_factor[1] * immobile.bounce_factor[1]
         self.velocity = (-v_x, -v_y)
         self.deltap(frac)
+        self.velocity = (b_x, b_y)
 
 
 class World(object):