From: Rémi Verschelde <rverschelde@gmail.com>
Date: Sat, 28 Jan 2017 14:26:00 +0000 (+0100)
Subject: AI: Prevent division by 0 when enemy has no velocity
X-Git-Url: https://git.jsancho.org/?p=lugaru.git;a=commitdiff_plain;h=a15391fb6e514e033a50c714ef32968d21419f19

AI: Prevent division by 0 when enemy has no velocity

Fixes #45.
---

diff --git a/Source/Objects/Person.cpp b/Source/Objects/Person.cpp
index 7f279de..1ac664c 100644
--- a/Source/Objects/Person.cpp
+++ b/Source/Objects/Person.cpp
@@ -8451,8 +8451,8 @@ void Person::doAI()
                 //chase player
                 XYZ rotatetarget = Person::players[0]->coords + Person::players[0]->velocity;
                 XYZ targetpoint = Person::players[0]->coords;
-                if (distsq(&Person::players[0]->coords, &coords) <
-                    distsq(&rotatetarget, &coords)) {
+                if (findLength(&velocity) != 0 &&
+                    distsq(&Person::players[0]->coords, &coords) < distsq(&rotatetarget, &coords)) {
                     targetpoint += Person::players[0]->velocity *
                                    findDistance(&Person::players[0]->coords, &coords) / findLength(&velocity);
                 }