fix: empty out all gridmap layers under candy pump and use precise duration timer for projectile destruction

scenes/candy_cannon.tscn

@@ -1,6 +1,6 @@
-[gd_scene load_steps=10 format=3 uid="uid://ddy2r7xto80gq"]
+[gd_scene format=3 uid="uid://ddy2r7xto80gq"]
 
-[ext_resource type="Script" path="res://scripts/controllers/candy_cannon_controller.gd" id="1_canon"]
+[ext_resource type="Script" uid="uid://du7cne5070ia0" path="res://scripts/controllers/candy_cannon_controller.gd" id="1_canon"]
 
 [sub_resource type="StandardMaterial3D" id="StandardMaterial3D_base"]
 albedo_color = Color(0.15, 0.15, 0.2, 1)
@@ -42,36 +42,35 @@ material = SubResource("StandardMaterial3D_pipe")
 inner_radius = 0.95
 outer_radius = 1.15
 rings = 32
-tube_segments = 12
 
-[node name="CandyCannon" type="Node3D"]
+[node name="CandyCannon" type="Node3D" unique_id=1515964905]
 script = ExtResource("1_canon")
 
-[node name="Base" type="MeshInstance3D" parent="."]
+[node name="Base" type="MeshInstance3D" parent="." unique_id=867716100]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0.25, 0)
 mesh = SubResource("CylinderMesh_base")
 
-[node name="Tank" type="MeshInstance3D" parent="."]
+[node name="Tank" type="MeshInstance3D" parent="." unique_id=2051786234]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.4, 0)
 mesh = SubResource("SphereMesh_tank")
 
-[node name="Pipe" type="MeshInstance3D" parent="."]
+[node name="Pipe" type="MeshInstance3D" parent="." unique_id=491265631]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 2.7, 0)
 mesh = SubResource("CylinderMesh_pipe")
 
-[node name="Ring1" type="MeshInstance3D" parent="."]
+[node name="Ring1" type="MeshInstance3D" parent="." unique_id=1607309179]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.4, 0)
 mesh = SubResource("TorusMesh_ring")
 
-[node name="Ring2" type="MeshInstance3D" parent="."]
+[node name="Ring2" type="MeshInstance3D" parent="." unique_id=850923213]
 transform = Transform3D(0.707107, 0.707107, 0, -0.707107, 0.707107, 0, 0, 0, 1, 0, 1.4, 0)
 mesh = SubResource("TorusMesh_ring")
 
-[node name="Ring3" type="MeshInstance3D" parent="."]
+[node name="Ring3" type="MeshInstance3D" parent="." unique_id=677024967]
 transform = Transform3D(0.707107, -0.707107, 0, 0.707107, 0.707107, 0, 0, 0, 1, 0, 1.4, 0)
 mesh = SubResource("TorusMesh_ring")
 
-[node name="OmniLight3D" type="OmniLight3D" parent="."]
+[node name="OmniLight3D" type="OmniLight3D" parent="." unique_id=1751121483]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 1.8, 0)
 light_color = Color(1, 0.4, 0.8, 1)
 light_energy = 3.0

scripts/controllers/candy_cannon_controller.gd

@@ -115,17 +115,21 @@ func spawn_projectile(target_world_pos: Vector3, duration: float) -> void:
 	
 	var mid_y = max(global_position.y, target_world_pos.y) + 4.0
 	var tween_y = create_tween()
+	
+	# Important: Make sure both halves of the y-tween together equal `duration`
 	tween_y.tween_property(projectile, "global_position:y", mid_y, duration / 2.0).set_trans(Tween.TRANS_SINE).set_ease(Tween.EASE_OUT)
-	tween_y.tween_property(projectile, "global_position:y", target_world_pos.y, duration / 2.0).set_trans(Tween.TRANS_QUAD).set_ease(Tween.EASE_IN).set_delay(duration / 2.0)
+	tween_y.tween_property(projectile, "global_position:y", target_world_pos.y, duration / 2.0).set_trans(Tween.TRANS_QUAD).set_ease(Tween.EASE_IN)
 	
 	# Add some spin to the projectile
 	var spin_tween = create_tween()
 	spin_tween.set_loops()
 	spin_tween.tween_property(projectile, "rotation", Vector3(PI*2, PI*2, PI*2), 0.5).as_relative()
 	
-	tween.chain().tween_callback(func():
+	# We need to wait for the X/Z tween to finish, but since it's parallel we can just use a separate timer or tween
-		spin_tween.kill()
+	# to kill the projectile exactly when duration is reached, ensuring it doesn't get killed early by X/Z finishing 1 frame earlier than Y
-		projectile.queue_free()
+	get_tree().create_timer(duration).timeout.connect(func():
+		if is_instance_valid(spin_tween): spin_tween.kill()
+		if is_instance_valid(projectile): projectile.queue_free()
 	)
 
 func can_rpc() -> bool:

scripts/managers/gauntlet_manager.gd

@@ -414,8 +414,10 @@ func _apply_arena_setup() -> void:
 				# Center 3x3 block: NPC obstacle (Candy Pump)
 				if _is_npc_zone(pos):
 					# Make the floor empty (-1) beneath the Candy Pump
+					# We need to clear all possible layers just in case
 					gridmap.set_cell_item(Vector3i(x, 0, z), -1)
 					gridmap.set_cell_item(Vector3i(x, 1, z), -1)
+					gridmap.set_cell_item(Vector3i(x, 2, z), -1)
 					continue
 				
 				# Boundary walls: perimeter (row 0, row 19, col 0, col 19)
@@ -423,11 +425,13 @@ func _apply_arena_setup() -> void:
 					# Also make border walls visually walkable floors instead of red blocks
 					gridmap.set_cell_item(Vector3i(x, 0, z), TILE_WALKABLE)
 					gridmap.set_cell_item(Vector3i(x, 1, z), -1)
+					gridmap.set_cell_item(Vector3i(x, 2, z), -1)
 					continue
 				
 				# Interior: walkable floor
 				gridmap.set_cell_item(Vector3i(x, 0, z), TILE_WALKABLE)
 				gridmap.set_cell_item(Vector3i(x, 1, z), -1)
+				gridmap.set_cell_item(Vector3i(x, 2, z), -1)
 	
 	gridmap.diagonal_movement = true
 	gridmap.update_grid_data()