From: paramat <mat.gregory@virginmedia.com>
Date: Sun, 8 May 2016 21:26:18 +0000 (+0100)
Subject: Tnt: Avoid divide-by-zero errors in calc_velocity()
X-Git-Tag: 0.4.14^0
X-Git-Url: https://git.librecmc.org/?a=commitdiff_plain;h=e7a55734d3de051d6565ebe28a9dd53043f9b352;p=oweals%2Fminetest_game.git

Tnt: Avoid divide-by-zero errors in calc_velocity()
---

diff --git a/mods/tnt/init.lua b/mods/tnt/init.lua
index 2f0ffdc4..9fd97f49 100644
--- a/mods/tnt/init.lua
+++ b/mods/tnt/init.lua
@@ -110,6 +110,11 @@ end
 
 
 local function calc_velocity(pos1, pos2, old_vel, power)
+	-- Avoid errors caused by a vector of zero length
+	if vector.equals(pos1, pos2) then
+		return old_vel
+	end
+
 	local vel = vector.direction(pos1, pos2)
 	vel = vector.normalize(vel)
 	vel = vector.multiply(vel, power)