Improve build_charge for neg values; use that

scripts/heroes/0.gd

@@ -27,7 +27,7 @@ func control_player(state):
 	if get_node("MasterOnly/Boost").is_pressed() and switch_charge > cost:
 		walk_speed *= 2
 		air_accel *= 3
-		switch_charge -= cost
+		build_charge(-cost)
 	.control_player(state)
 	wallride(state)
 	walk_speed = original_speed

scripts/heroes/4.gd

@@ -36,7 +36,7 @@ func _process(delta):
 			destroy_ability.disabled = false
 			if Input.is_action_just_pressed("primary_ability"):
 					if switch_charge > looking_at.destroy_cost:
-						switch_charge -= looking_at.destroy_cost
+						build_charge(-looking_at.destroy_cost)
 						looking_at.rpc("destroy")
 		else:
 			destroy_ability.disabled = true

scripts/heroes/5.gd

@@ -31,7 +31,7 @@ func _process(delta):
 		get_node("MasterOnly/Crosshair").set_text(crosshair)
 		var can_build = switch_charge > portal_ability.cost
 		if placement.place_input(radius, can_build, true) and is_second:
-			switch_charge -= portal_ability.cost
+			build_charge(-portal_ability.cost)
 
 		teleport_ability.disabled = placement.placed.size() <= 1
 

scripts/player.gd

@@ -98,8 +98,6 @@ func _process(delta):
 			switch_charge = switch_charge_cap
 		switch_bar.value = switch_charge
 		switch_bar_extra.value = switch_charge - 100
-		# ... And it's network value
-		rset_unreliable("switch_charge", switch_charge)
 
 		# AI recording
 		if "record" in player_info:
@@ -133,7 +131,13 @@ func build_charge(amount):
 		if obj.right_active != player_info.is_right_team and obj.active:
 			# Point against us (right active and left, or vice versa)
 			amount *= uncapped_advantage
+	else:
+		# Only build down to 0
+		amount = max(amount, -switch_charge)
 	switch_charge += amount
+	if is_network_master():
+		rset_unreliable("switch_charge", switch_charge)
+	return amount
 
 sync func spawn():
 	emit_signal("spawn")