1 files changed, 11 insertions, 5 deletions
diff --git a/src/sandbox.hpp b/src/sandbox.hpp
index c6453c7..f65caaf 100644
--- a/src/sandbox.hpp
+++ b/src/sandbox.hpp
@@ -8,15 +8,20 @@
 const int MBIT_DISPLACABLE = 1;
 
 struct Tile {
-    enum Material : unsigned char {
+    enum Solid : unsigned char {
         AIR = 0,
-        SOLID,
+        ROCK,
         SAND,
+    };
+
+    enum Fluid : unsigned char {
+        NOTHING = 0,
         WATER,
     };
 
-    Material mat;
-    uint8_t pressure = 0;
+    Solid so = {};
+    Fluid fl = {};
+    uint8_t fmass = 0;
     bool updated = false;
 
     uint32_t get_color() const;
@@ -26,8 +31,9 @@ struct Sandbox {
     std::vector<uint32_t> _bitmap;
     std::vector<Tile> _a;
     Pcg32 _pcg;
-    Tile _solid_tile;
+    Tile _wall_tile;
     int width, height;
+    int _x, _y;
     int ncycle = 0;
 
     Sandbox(int w, int h);