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#Super Simple Anti-Lag System 2.0 By Amaranth
#Last updated March 22, 2009
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# Additional Credits:
# Angelix, Shaz, Near Fantastica
####################################################
# Usage: Free for all to use.
####################################################

#--------------------------------------------------------------------------
#--------------------------------------------------------------------------
# SET YOUR ANTI-LAG PERAMETERS
#--------------------------------------------------------------------------
#--------------------------------------------------------------------------

# 1. Set anti-lag for drawing events
# -----------------------
# Only draw event GRAPHIC if within this horizontal # of tiles from player
# Note: if event is outside of this range, and this range is within screen
# width, the event will appear to "drag" across the screen because the
# game is not updating the graphic.
PLAYER_RANGE_WIDTH = 20

# Only draw event GRAPHIC if within this vertical # of tiles from player
# Note: if event is outside of this range, and this range is within screen
# height, the event will appear to "drag" across the screen because the
# game is not updating the graphic.
PLAYER_RANGE_HEIGHT = 15


# 2. Set anti-lag for moving events
# -----------------------
# Only process event movement if within this horizontal # of tiles from player
# Note: if event is outside of this range, and this range is within screen
# width, the event will stop moving.
MAP_RANGE_WIDTH = 20

# Only process event movement if within this vertical # of tiles from player
# Note: if event is outside of this range, and this range is within screen
# height, the event will stop moving.
MAP_RANGE_HEIGHT = 15

# 3. Set anti-lag movement for specific events
# -----------------------
# You can stop the game from updating specific events. This is
# helpful if you have several events on screen. Only use this on events
# that are invisible or don't move around.
# To Use: Create an event on a map and change the name of the event to the
# value below (by default, this is IGNORE). The name of an event
# is in the upper-left side of the event dialog box)
ANTI_LAG_EVENT_NAME = "IGNORE"


# 4. Turn anti-lag on and off in the game while playing the game
# ------------------------
# On some maps in your game, you may not want to use the anti-lag system,
# or you may want to turn it off during some scenes in your game.
# To Use: Use a switch to turn anti-lag off and on. (by default this is Switch 1)
ANTI_LAG_SWITCH = 1



#--------------------------------------------------------------------------
#--------------------------------------------------------------------------
class Game_Character
#--------------------------------------------------------------------------
#--------------------------------------------------------------------------
attr_accessor :inrange_char # event near player? (stop draw)
attr_accessor :inrange_map # event on map? (stop movement)
attr_reader :event
end

#--------------------------------------------------------------------------
#--------------------------------------------------------------------------
class Game_Map
#--------------------------------------------------------------------------
#--------------------------------------------------------------------------
#--------------------------------------------------------------------------
# * Frame Update
#--------------------------------------------------------------------------
def update
# Refresh map if necessary
if $game_map.need_refresh
refresh
end
# If scrolling
if @scroll_rest > 0
# Change from scroll speed to distance in map coordinates
distance = 2 ** @scroll_speed
# Execute scrolling
case @scroll_direction
when 2 # Down
scroll_down(distance)
when 4 # Left
scroll_left(distance)
when 6 # Right
scroll_right(distance)
when 8 # Up
scroll_up(distance)
end
# Subtract distance scrolled
@scroll_rest -= distance
end

# Update map event
for event in @events.values
# ANTI LAG CHECK START---------------------------------------------
if ((event.inrange_map == 1) && (event.event.name != ANTI_LAG_EVENT_NAME)) or [3,4].include?event.trigger
event.update
end
# ANTI LAG CHECK END-----------------------------------------------
end

# Update common event
for common_event in @common_events.values
common_event.update
end

# Manage fog scrolling
@fog_ox -= @fog_sx / 8.0
@fog_oy -= @fog_sy / 8.0

# Manage change in fog color tone
if @fog_tone_duration >= 1
d = @fog_tone_duration
target = @fog_tone_target
@fog_tone.red = (@fog_tone.red * (d - 1) + target.red) / d
@fog_tone.green = (@fog_tone.green * (d - 1) + target.green) / d
@fog_tone.blue = (@fog_tone.blue * (d - 1) + target.blue) / d
@fog_tone.gray = (@fog_tone.gray * (d - 1) + target.gray) / d
@fog_tone_duration -= 1
end

# Manage change in fog opacity level
if @fog_opacity_duration >= 1
d = @fog_opacity_duration
@fog_opacity = (@fog_opacity * (d - 1) + @fog_opacity_target) / d
@fog_opacity_duration -= 1
end
end

end

#------------------------------------------------------------------------------
#------------------------------------------------------------------------------
# ��€”� Spriteset_Map
#------------------------------------------------------------------------------
#------------------------------------------------------------------------------
class Spriteset_Map

#--------------------------------------------------------------------------
# ��€”� Frame Update
#--------------------------------------------------------------------------
def update
# If panorama is different from current one
if @panorama_name != $game_map.panorama_name or
@panorama_hue != $game_map.panorama_hue
@panorama_name = $game_map.panorama_name
@panorama_hue = $game_map.panorama_hue
if @panorama.bitmap != nil
@panorama.bitmap.dispose
@panorama.bitmap = nil
end
if @panorama_name != ""
@panorama.bitmap = RPG::Cache.panorama(@panorama_name, @panorama_hue)
end
Graphics.frame_reset
end
# If fog is different than current fog
if @fog_name != $game_map.fog_name or @fog_hue != $game_map.fog_hue
@fog_name = $game_map.fog_name
@fog_hue = $game_map.fog_hue
if @fog.bitmap != nil
@fog.bitmap.dispose
@fog.bitmap = nil
end
if @fog_name != ""
@fog.bitmap = RPG::Cache.fog(@fog_name, @fog_hue)
end
Graphics.frame_reset
end
# Update tilemap
@tilemap.ox = $game_map.display_x / 4
@tilemap.oy = $game_map.display_y / 4
@tilemap.update
# Update panorama plane
@panorama.ox = $game_map.display_x / 8
@panorama.oy = $game_map.display_y / 8
# Update fog plane
@fog.zoom_x = $game_map.fog_zoom / 100.0
@fog.zoom_y = $game_map.fog_zoom / 100.0
@fog.opacity = $game_map.fog_opacity
@fog.blend_type = $game_map.fog_blend_type
@fog.ox = $game_map.display_x / 4 + $game_map.fog_ox
@fog.oy = $game_map.display_y / 4 + $game_map.fog_oy
@fog.tone = $game_map.fog_tone

# Update character sprites
for sprite in @character_sprites
# ANTI LAG CHECK START---------------------------------------------
if in_range?(sprite.character)
sprite.update
end
# ANTI LAG CHECK END---------------------------------------------
end

# Update weather graphic
@weather.type = $game_screen.weather_type
@weather.max = $game_screen.weather_max
@weather.ox = $game_map.display_x / 4
@weather.oy = $game_map.display_y / 4
@weather.update
# Update picture sprites
for sprite in @picture_sprites
sprite.update
end
# Update timer sprite
@timer_sprite.update
# Set screen color tone and shake position
@viewport1.tone = $game_screen.tone
@viewport1.ox = $game_screen.shake
# Set screen flash color
@viewport3.color = $game_screen.flash_color
# Update viewports
@viewport1.update
@viewport3.update
end


#--------------------------------------------------------------------------
# ��€”� Check if events are in range (ANTI-LAG)
#--------------------------------------------------------------------------
def in_range?(event)

diff_x = ($game_player.real_x - event.real_x).abs # absolute value
diff_y = ($game_player.real_y - event.real_y).abs # absolute value

# update the graphic for the event in this range
player_width = 128 * PLAYER_RANGE_WIDTH
player_height = 128 * PLAYER_RANGE_HEIGHT

# update actions being performed by the event in this range
screen_width = 128 * MAP_RANGE_WIDTH
screen_height = 128 * MAP_RANGE_HEIGHT

# stop an event from performing actions if outside of this range on the map
# note: if range is small, event will stop moving and performing tasks on screen
if ((diff_x < screen_width && diff_y < screen_height) or $game_switches[ANTI_LAG_SWITCH])
event.inrange_map = 1
else
event.inrange_map = 0
end

# stop an event's graphic from updating if outside of the range around player
# note: if range is small, event graphic will appear to "drag" across screen
# this happens because the graphic is not updating.
if ((diff_x < player_width && diff_y < player_height) or $game_switches[ANTI_LAG_SWITCH])
event.inrange_char = 1
return true
else
event.inrange_char = 0
return false
end

end
end