Core/MMAPs: Reduce chances of breaking tile connections

Reduce chances of breaking tile connections caused by floating point rounding issues.

1 files changed, 9 insertions, 4 deletions

diff --git a/src/tools/mmaps_generator/MapBuilder.cpp b/src/tools/mmaps_generator/MapBuilder.cpp
index 44812edc330..7131dab6bfa 100644
--- a/src/tools/mmaps_generator/MapBuilder.cpp
+++ b/src/tools/mmaps_generator/MapBuilder.cpp
@@ -645,10 +645,15 @@ namespace MMAP
                 Tile& tile = tiles[x + y * TILES_PER_MAP];
 
                 // Calculate the per tile bounding box.
-                tileCfg.bmin[0] = config.bmin[0] + float(x*config.tileSize - config.borderSize)*config.cs;
-                tileCfg.bmin[2] = config.bmin[2] + float(y*config.tileSize - config.borderSize)*config.cs;
-                tileCfg.bmax[0] = config.bmin[0] + float((x+1)*config.tileSize + config.borderSize)*config.cs;
-                tileCfg.bmax[2] = config.bmin[2] + float((y+1)*config.tileSize + config.borderSize)*config.cs;
+                tileCfg.bmin[0] = config.bmin[0] + x * float(config.tileSize * config.cs);
+                tileCfg.bmin[2] = config.bmin[2] + y * float(config.tileSize * config.cs);
+                tileCfg.bmax[0] = config.bmin[0] + (x + 1) * float(config.tileSize * config.cs);
+                tileCfg.bmax[2] = config.bmin[2] + (y + 1) * float(config.tileSize * config.cs);
+                
+                tileCfg.bmin[0] -= tileCfg.borderSize * tileCfg.cs;
+                tileCfg.bmin[2] -= tileCfg.borderSize * tileCfg.cs;
+                tileCfg.bmax[0] += tileCfg.borderSize * tileCfg.cs;
+                tileCfg.bmax[2] += tileCfg.borderSize * tileCfg.cs;
 
                 // build heightfield
                 tile.solid = rcAllocHeightfield();