removed negative chunks

1 files changed, 8 insertions, 0 deletions

diff --git a/src/tiledmap.c b/src/tiledmap.c
index 6d33463..ea587cc 100644
--- a/src/tiledmap.c
+++ b/src/tiledmap.c
@@ -127,6 +127,11 @@ void commitChunk(TiledMap * tiledMap, CachedChunk * cached) {
 }
 
 void unloadChunk(TiledMap * tiledMap, CachedChunk * cached) {
+
+    // do not cache an unloaded chunk
+    if (cached->chunk == NULL)
+        return;
+
     // commit a chunk before unloading
     commitChunk(tiledMap, cached);
 
@@ -191,6 +196,9 @@ Tile getChunkedTile(TiledMap *tiledMap, int x, int y) {
     int chunkX = (x - inChunkX) / tiledMap->chunkWidth;
     int chunkY = (y - inChunkY) / tiledMap->chunkHeight;
 
+    if (x < 0 || y < 0)
+        return 0;
+
     CachedChunk * cached = loadChunk(tiledMap, chunkX, chunkY);
     if (cached == NULL)
         return 0;