I'll be the first to admit that I'm no scripter. But, I understand enough to attempt making minor tweaks to the system where it might be called for. Right now, I'm attempting to add a "Load" option below "Save" in the in-game pause menu. Fairly simple, right?
I've managed to get it working from the in-game menu, but I run into an "undefined method `[]' for nil:NilClass" error when I access the load game window from the title and then cancel back to the title, and I can't figure out why.
What I've done is modify Scene_Menu to include that extra menu choice (no bugs there), and when the "Load" option is selected, an in-game switch is flipped on before moving to Scene_Load. Upon hitting Cancel on the load screen, the script tests if the switch is set to true or not--if so, it returns the player to the map screen and sets it back to false. If not, then the player got there from the title screen and it goes back to Scene_Title.
Here's the chunk that's returning the error:
#--------------------------------------------------------------------------
# * Cancel Processing
#--------------------------------------------------------------------------
def on_cancel
# Play cancel SE
$game_system.se_play($data_system.cancel_se)
# If called from menu
if $game_switches[5000] == true
# Switch to map screen
$scene = Scene_Map.new
$game_switches[5000] = false
return
else
# Switch to title screen
$scene = Scene_Title.new
return
end
end
Specifically, the error is occurring on Line 61:
if $game_switches[5000] == true
Here's the entire script if needed for reference:
#==============================================================================
# ** Common event in menu
#------------------------------------------------------------------------------
# This is just a simple edit to Scene_Menu.
#==============================================================================
# The first parameter is the text that will show up in the menu
# and the second parameter is the id of the common event.
COMMON_EVENTS = [
["Journal", 1],["Party", 2],["Abilities", 18]
]
class Scene_Menu
#--------------------------------------------------------------------------
# * Main Processing
#--------------------------------------------------------------------------
def main
# Make command window
s1 = $data_system.words.item
s2 = $data_system.words.skill
s3 = $data_system.words.equip
s4 = "Status"
s5 = "Save"
s6 = "Load"
s7 = "Quit"
extra_menu_items = []
COMMON_EVENTS.each do |e|
extra_menu_items.push(e[0])
end
@command_window = Window_Command.new(160, [s1, s2, s3, s4] + extra_menu_items + [s5, s6])
@command_window.index = @menu_index
# If number of party members is 0
if $game_party.actors.size == 0
# Disable items, skills, equipment, and status
@command_window.disable_item(0)
@command_window.disable_item(1)
@command_window.disable_item(2)
@command_window.disable_item(3)
end
# If save is forbidden
if $game_system.save_disabled
# Disable save
@command_window.disable_item(4)
end
# Make gold window
@gold_window = Window_Gold.new
@gold_window.x = 0
@gold_window.y = 416
# Make status window
@status_window = Window_MenuStatus.new
@status_window.x = 160
@status_window.y = 0
# Execute transition
Graphics.transition
# Main loop
loop do
# Update game screen
Graphics.update
# Update input information
Input.update
# Frame update
update
# Abort loop if screen is changed
if $scene != self
break
end
end
# Prepare for transition
Graphics.freeze
# Dispose of windows
@command_window.dispose
@gold_window.dispose
@status_window.dispose
end
#--------------------------------------------------------------------------
# * Frame Update
#--------------------------------------------------------------------------
def update
# Update windows
@command_window.update
@gold_window.update
@status_window.update
# If command window is active: call update_command
if @command_window.active
update_command
return
end
# If status window is active: call update_status
if @status_window.active
update_status
return
end
end
#--------------------------------------------------------------------------
# * Frame Update (when command window is active)
#--------------------------------------------------------------------------
def update_command
# If B button was pressed
if Input.trigger?(Input::B)
# Play cancel SE
$game_system.se_play($data_system.cancel_se)
# Switch to map screen
$scene = Scene_Map.new
return
end
# If C button was pressed
if Input.trigger?(Input::C)
# If command other than save or end game, and party members = 0
if $game_party.actors.size == 0 and @command_window.index < 4
# Play buzzer SE
$game_system.se_play($data_system.buzzer_se)
return
end
# Branch by command window cursor position
case @command_window.index
when 0 # item
# Play decision SE
$game_system.se_play($data_system.decision_se)
# Switch to item screen
$scene = Scene_Item.new
when 1 # skill
# Play decision SE
$game_system.se_play($data_system.decision_se)
# Make status window active
@command_window.active = false
@status_window.active = true
@status_window.index = 0
when 2 # equipment
# Play decision SE
$game_system.se_play($data_system.decision_se)
# Make status window active
@command_window.active = false
@status_window.active = true
@status_window.index = 0
when 3 # status
# Play decision SE
$game_system.se_play($data_system.decision_se)
# Make status window active
@command_window.active = false
@status_window.active = true
@status_window.index = 0
when COMMON_EVENTS.size + 4 # save
# If saving is forbidden
if $game_system.save_disabled
# Play buzzer SE
$game_system.se_play($data_system.buzzer_se)
return
end
# Play decision SE
$game_system.se_play($data_system.decision_se)
# Switch to save screen
$scene = Scene_Save.new
when COMMON_EVENTS.size + 5 # load
$game_switches[5000] = true
# Play decision SE
$game_system.se_play($data_system.decision_se)
# Switch to load screen
$scene = Scene_Load.new
when COMMON_EVENTS.size + 6 # end game
# Play decision SE
$game_system.se_play($data_system.decision_se)
# Switch to end game screen
$scene = Scene_End.new
else
# Play decision SE
$game_system.se_play($data_system.decision_se)
# Set the common event to call
$game_temp.common_event_id = COMMON_EVENTS[@command_window.index - 4][1]
# And switch to the map
$scene = Scene_Map.new
end
return
end
end
end
It's an existing tweak to Scene_Menu, but one that worked flawlessly and shouldn't be causing any conflicts with these kinds of modifications. It's much more likely just an issue with my syntax, but...
Any ideas on what the problem might be? Has the in-game switch handling not yet been created/defined by the title screen point of the game?
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