parallelization

1 files changed, 11 insertions, 3 deletions

diff --git a/src/sim/materials/water.rs b/src/sim/materials/water.rs
index 65782dd..d76ec5b 100644
--- a/src/sim/materials/water.rs
+++ b/src/sim/materials/water.rs
@@ -25,6 +25,17 @@ pub fn sim_update(ctx: &mut UpdateCtx) {
         return;
     }
 
+    // if we can't move left, just move right
+    if !can_move_left {
+        ctx.candidates_swap(&[(1, 0)]);
+        return;
+    }
+    // and vice versa
+    if !can_move_right {
+        ctx.candidates_swap(&[(-1, 0)]);
+        return;
+    }
+
     // find the closest hole within 20 pixels (TODO optimize)
     // a hole is any space below us with a lesser density
     // prevents equidistance stuck state
@@ -35,9 +46,6 @@ pub fn sim_update(ctx: &mut UpdateCtx) {
         } else {
             -starting_side
         };
-        if (side == 1 && !can_move_right) || (side == -1 && !can_move_left) {
-            continue;
-        }
 
         let offset = side * (1 + i / 2);
         let hole_target = ctx.get_cell(offset, 1);