From: Steinar H. Gunderson <sgunderson@bigfoot.com>
Date: Sun, 25 Mar 2012 19:13:30 +0000 (+0200)
Subject: Properly handle the fact that score X-0 is different from X-(-X). Urg, bad bug.
X-Git-Url: https://git.sesse.net/?p=wloh;a=commitdiff_plain;h=6e223b94f62742c179d7f89124d9203f3d49aa48

Properly handle the fact that score X-0 is different from X-(-X). Urg, bad bug.
---

diff --git a/mcwordfeud.cpp b/mcwordfeud.cpp
index 3b55f01..049a219 100644
--- a/mcwordfeud.cpp
+++ b/mcwordfeud.cpp
@@ -196,8 +196,13 @@ int main(int argc, char **argv)
 				float mu = drawn_ratings(pl1) - drawn_ratings(pl2);
 				
 				int score = lrintf(draw_gaussian(mu, match_stddev));
-				scores[pl1][pl2] = score;
-				scores[pl2][pl1] = -score;
+				if (score >= 0) {
+					scores[pl1][pl2] = score;
+					scores[pl2][pl1] = 0;
+				} else {
+					scores[pl1][pl2] = 0;
+					scores[pl2][pl1] = -score;
+				}
 			}
 		}
 
@@ -249,7 +254,7 @@ int main(int argc, char **argv)
 						continue;
 					}
 					float mu = drawn_ratings(pl1) - drawn_ratings(pl2);
-					float z = (scores[pl1][pl2] - mu) / match_stddev;
+					float z = (scores[pl1][pl2] - scores[pl2][pl1] - mu) / match_stddev;
 					llh -= z * z * 0.5f;
 				}
 			}
@@ -277,7 +282,7 @@ int main(int argc, char **argv)
 				if (has_scores[pl1][pl2]) {
 					continue;
 				}
-				printf("%s %s %d\n", players[pl1].c_str(), players[pl2].c_str(), mlm_scores[pl1][pl2]);
+				printf("%s %s %d\n", players[pl1].c_str(), players[pl2].c_str(), mlm_scores[pl1][pl2] - mlm_scores[pl2][pl1]);
 			}
 		}
 	}