animations

test/puck.mjs

@@ -118,6 +118,58 @@ section('a dumped puck slides a long way but does stop');
   physics.destroy();
 }
 
+section('proximity grab rewards lining up a moving puck');
+{
+  const {
+    interceptQuality, speedGrabFactor, crowdGrabFactor, CARRY: C,
+  } = await import('../src/game/possession.js');
+  const s = { x: 0, z: 0, yaw: Math.PI / 2, vx: 4, vz: 0 };
+  // Puck ahead on the line (within grab bubble), coming toward the skater.
+  const onLine = interceptQuality(
+    s,
+    { x: 1.5, y: 0.02, z: 0 },
+    { x: -12, y: 0, z: 0 },
+    C.grabRadius,
+  );
+  // Same distance, puck flying wide past the skater.
+  const wide = interceptQuality(
+    s,
+    { x: 1.5, y: 0.02, z: 1.4 },
+    { x: -12, y: 0, z: 0 },
+    C.grabRadius,
+  );
+  ok(onLine > 0.35, `lined-up hard puck is grabable (${onLine.toFixed(2)})`);
+  ok(onLine > wide + 0.08, `and beats a wide miss (${onLine.toFixed(2)} vs ${wide.toFixed(2)})`);
+
+  // Still puck at the feet — easy.
+  const soft = interceptQuality(
+    { x: 0, z: 0, yaw: 0, vx: 0, vz: 0 },
+    { x: 0.4, y: 0.02, z: 0.3 },
+    { x: 0, y: 0, z: 0 },
+    C.grabRadius,
+  );
+  ok(soft > 0.4, `soft puck nearby is easy (${soft.toFixed(2)})`);
+}
+
+section('fast pucks and crowds lower proximity grab odds');
+{
+  const { speedGrabFactor, crowdGrabFactor, CARRY: C } = await import('../src/game/possession.js');
+  const still = speedGrabFactor(0, C.grabSpeedHalf);
+  const pass = speedGrabFactor(12, C.grabSpeedHalf);
+  const slap = speedGrabFactor(35, C.grabSpeedHalf);
+  ok(still > 0.9, `still puck is free to grab (${still.toFixed(2)})`);
+  ok(pass < still * 0.55, `a firm pass is harder (${pass.toFixed(2)} vs ${still.toFixed(2)})`);
+  ok(slap < pass, `a rocket is harder still (${slap.toFixed(2)})`);
+  ok(slap < 0.2, `slapshot proximity is weak (${slap.toFixed(2)})`);
+
+  near(crowdGrabFactor(1, C.grabCrowdK), 1, 1e-9, 'one body: full claim');
+  ok(crowdGrabFactor(2, C.grabCrowdK) < 0.75, `two bodies cut odds (${crowdGrabFactor(2, C.grabCrowdK).toFixed(2)})`);
+  ok(
+    crowdGrabFactor(4, C.grabCrowdK) < crowdGrabFactor(2, C.grabCrowdK),
+    'more bodies cut further',
+  );
+}
+
 section('a skater picks up a loose puck');
 {
   const { physics, match } = arena(1);