updated

programs/roulette.lua

@@ -86,8 +86,8 @@ local BOWL_SLOPE         = math.pi / 9   -- 20 degrees
 -- Pocket well is deeper — steeper slope
 local POCKET_SLOPE       = math.pi / 5   -- 36 degrees
 -- Restitution on bowl surface normal bounce
-local RESTITUTION_WALL   = 0.55
-local RESTITUTION_POCKET = 0.38
+local RESTITUTION_WALL   = 0.82
+local RESTITUTION_POCKET = 0.68
 -- Rolling friction: velocity multiplier per second on the bowl surface
 local FRICTION_ROLL      = 0.988   -- per frame on track
 local FRICTION_POCKET    = 0.970   -- per frame in pocket
@@ -252,7 +252,9 @@ local function bgAt(bx, by)
 end
 
 local function eraseBall()
-    px_circle(ballX, ballY, BALL_RADIUS + 2, bgAt(ballX, ballY))
+    -- Shadow is drawn at +2,+2 with full BALL_RADIUS, so the total footprint
+    -- extends BALL_RADIUS+2 from centre in x/y.  Add 3px margin to be safe.
+    px_circle(ballX, ballY, BALL_RADIUS + 5, bgAt(ballX, ballY))
 end
 
 local function drawBall(bx, by)