From 4e0511a8a0cb294d330f6fde0640365ae3173ab5 Mon Sep 17 00:00:00 2001
From: Brickcaster <dralon@yahoo.com>
Date: Sat, 24 Oct 2015 21:47:48 -0400
Subject: [PATCH] Fix for negative coords.  Regarding issue #2665

int() of negative numbers rounds up. Needed to add a condition to account for negative values. Thanks to Romulox_x for providing this solution.
---
 scene/2d/tile_map.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/scene/2d/tile_map.cpp b/scene/2d/tile_map.cpp
index 418ee192b2..167b637bdc 100644
--- a/scene/2d/tile_map.cpp
+++ b/scene/2d/tile_map.cpp
@@ -1031,13 +1031,12 @@ Vector2 TileMap::world_to_map(const Vector2& p_pos) const{
 	switch(half_offset) {
 
 		case HALF_OFFSET_X: {
-			if (int(ret.y)&1) {
-
+			if ( ret.y > 0 ? int(ret.y)&1 : (int(ret.y)-1)&1 ) {
 				ret.x-=0.5;
 			}
 		} break;
 		case HALF_OFFSET_Y: {
-			if (int(ret.x)&1) {
+			if ( ret.x > 0 ? int(ret.x)&1 : (int(ret.x)-1)&1) {
 				ret.y-=0.5;
 			}
 		} break;