Make collider retrieving more permissive

engine/breeze/world/map.c

@@ -276,28 +276,10 @@ void bzTileMapDrawColliders(BzTileMap *map) {
     }
 }
 
-bool bzTileMapCanPlace(BzTileMap *map, i32 tileX, i32 tileY, i32 sizeX, i32 sizeY) {
-    for (i32 y = tileY; y < tileY + sizeY; y++) {
-        for (i32 x = tileX; x < tileX + sizeX; x++) {
-
-            for (i32 i = 0; i < map->layerCount; i++) {
-                BzTileLayer *layer = map->layers + i;
-                if (layer->tilesetIdx == -1) continue;
-
-                BzTileset *tileset = map->tilesets + layer->tilesetIdx;
-
-                i16 tile = bzTileLayerGetTile(layer, x, y);
-                BzTileShape collider = bzTilesetGetTileCollider(tileset, tile);
-                if (collider.type != BZ_TILE_SHAPE_NONE)
-                    return false;
-            }
-        }
-    }
-
-    return true;
-}
 BzTileCollider bzTileMapGetCollider(BzTileMap *map, i32 x, i32 y) {
     i32 idx = y * map->width + x;
-    BZ_ASSERT(idx < 0 && idx < map->collidersCount);
+    if (idx < 0 || idx >= map->collidersCount) {
+        return (BzTileCollider) {{BZ_TILE_SHAPE_NONE}};
+    }
     return map->colliderMap[idx];
 }

engine/breeze/world/map.h

@@ -95,7 +95,6 @@ void bzTileMapDestroy(BzTileMap *tilemap);
 
 void bzTileMapDraw(BzTileMap *map);
 void bzTileMapDrawColliders(BzTileMap *map);
-bool bzTileMapCanPlace(BzTileMap *map, i32 tileX, i32 tileY, i32 sizeX, i32 sizeY);
 BzTileCollider bzTileMapGetCollider(BzTileMap *map, i32 x, i32 y);
 
 

game/main.c

@@ -27,6 +27,24 @@ bool handleGameObjects(BzTileObjectLayer *objectLayer) {
     return false;
 }
 
+bool canBuildOn(BzTileMap *map, i32 tileX, i32 tileY, i32 sizeX, i32 sizeY) {
+    // Need to check neighbour tiles
+    tileX -= 1;
+    tileY -= 1;
+    sizeX += 2;
+    sizeY += 2;
+
+
+    for (i32 y = tileY; y < tileY + sizeY; y++) {
+        for (i32 x = tileX; x < tileX + sizeX; x++) {
+            BzTileCollider collider = bzTileMapGetCollider(map, x, y);
+            if (collider.shapes[0].type != BZ_TILE_SHAPE_NONE) return false;
+        }
+    }
+
+    return true;
+}
+
 bool init(Game *game) {
     int screenWidth = 1280;
     int screenHeight = 720;
@@ -100,7 +118,7 @@ void render(float dt, Game *game) {
 
     if (tileX != 0 && tileY != 0) {
 
-        bool canPlace = bzTileMapCanPlace(&game->map, tileX, tileY, sizeX, sizeY);
+        bool canPlace = canBuildOn(&game->map, tileX, tileY, sizeX, sizeY);
         Color placeColor = canPlace ?
                            (Color) {0, 255, 0, 200} :
                            (Color) {255, 0, 0, 200};