Map Zoom

[trebor777]

Map Zoom
by trebor777
Version: 1.0
Dec 31 2006

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Introduction

Allow you to zoom in/out on a specific location on a map

Script
You'll need the SDK,
and the rewrited Tilemap class
^
|-------------FIX THIS

My script

Code:

#==============================================================================
# ** Map_Zoom
#------------------------------------------------------------------------------
# Trebor777
# Version 1.0
# 01/01/2006
#------------------------------------------------------------------------------
# * Description FR:
#
#   Ce script permet d'effectuer des zoom in et zoom out sur un point précis de
#   la map.
#
# * Description US:
#
#   This script allow you to zoom in or out on a specific map location.
#
#------------------------------------------------------------------------------
# * Instructions FR:
#
#   Placer le Script sous le SDK et au dessus de Main.
#   Utiliser 1 des 2 commandes dans un script ou un évènement "appeler un script":
#    .  $game_map.start_zoom(x,y,coef,spd)
#    .  $scene.zoom(x,y,coef,spd) #avec $scene une instance de Scene_Map
#
#   x et y: Coordonnées(pas en pixel) du point à zoomer/dézoomer
#   coef  : Valeur du zoom à atteindre de 0.1, à l'infini
#   spd   : Vitesse du zoom, la variation est basée sur le calcul suivant:
#           0.2*spd
#
# * Instructions US:
#
#   Place The Script Below the SDK and Above Main.
#   Use 1 of this 2 command in a script or with the event command "Call a script":
#    .  $game_map.start_zoom(x,y,coef,spd)
#    .  $scene.zoom(x,y,coef,spd) #with $scene a Scene_Map instance
#
#   x & y: Target Location(not inpixel)to zoom in/out
#   coef  : Zoom value to reach from 0.1, to infinite
#   spd   : Zoom speed, the fluctuation is based on this formula: 0.2*spd
#          
#
#==============================================================================
#------------------------------------------------------------------------------
# * SDK Log Script
#------------------------------------------------------------------------------
SDK.log('Map_Zoom', 'Trebor777', 1.0, '01-01-2006')

#------------------------------------------------------------------------------
# * Begin SDK Enable Test
#------------------------------------------------------------------------------
if SDK.state('Map_Zoom') and SDK.state('Tilemap')

  #==========================================================================
====
  # ** Spriteset_Map
  #==========================================================================
====
  class Spriteset_Map
    def update_character_sprites
      # Update character sprites
      for sprite in @character_sprites
        sprite.zoom_x=$game_map.tilemap_zoom_x
        sprite.zoom_y=$game_map.tilemap_zoom_y
        sprite.update
      end
    end
  end
  #==========================================================================
====
  # ** Scene_Map
  #==========================================================================
====
  class Scene_Map
    def zoom(x,y,coef,spd)
      if !$game_map.zooming?
        $game_map.start_zoom(x,y,coef,spd)
      end
    end
  end
  #==========================================================================
====
  # ** Game_Map
  #==========================================================================
====
  class Game_Map
    #--------------------------------------------------------------------------
    alias zoom_setup_scroll setup_scroll
    def setup_scroll
      setup_zoom
      zoom_setup_scroll
    end
    #--------------------------------------------------------------------------
    def setup_zoom
      # Initialize scroll information
      @zoom_rest = 0
      @zoom_speed = 2
    end
    #--------------------------------------------------------------------------
    # * Start Zoom
    #     focus  : zoom value to reach
    #     speed  : zoom speed
    #--------------------------------------------------------------------------
    def start_zoom(x,y,focus, speed)
      @x_zoom=x
      @y_zoom=y
      @zoom_rest = (focus-@tilemap_zoom_x).abs
      @zoom_speed = speed*((focus-@tilemap_zoom_x)/@zoom_rest)
    end
    #--------------------------------------------------------------------------
    # * Determine if Scrolling
    #--------------------------------------------------------------------------
    def zooming?
      return @zoom_rest > 0
    end
    #--------------------------------------------------------------------------
    alias zoom_update_scrolling update_scrolling
    def update_scrolling
      update_zooming
      zoom_update_scrolling
    end
    #--------------------------------------------------------------------------
    def update_zooming
      # If zooming
      if @zoom_rest > 0
        # Change from zoom speed to focus in map coordinates
        focus = 0.2 * @zoom_speed
        # Execute zooming
        @tilemap_zoom_x+=focus
        @tilemap_zoom_y+=focus
        # Subtract focus zoomed
        @zoom_rest -= focus.abs
        $game_player.center(@x_zoom,@y_zoom)
      end
    end
    #--------------------------------------------------------------------------
    # * Scroll Down
    #     distance : scroll distance
    #--------------------------------------------------------------------------
    def scroll_down(distance)
      @display_y = [@display_y + distance, (self.height*@tilemap_zoom_y - 15) * 128/tilemap_zoom_y].min
    end
    #--------------------------------------------------------------------------
    # * Scroll Left
    #     distance : scroll distance
    #--------------------------------------------------------------------------
    def scroll_left(distance)
      @display_x = [@display_x - distance, 0].max
    end
    #--------------------------------------------------------------------------
    # * Scroll Right
    #     distance : scroll distance
    #--------------------------------------------------------------------------
    def scroll_right(distance)
      @display_x = [@display_x + distance, (self.width*@tilemap_zoom_x - 20) * 128/tilemap_zoom_x].min
    end
    #--------------------------------------------------------------------------
    # * Scroll Up
    #     distance : scroll distance
    #--------------------------------------------------------------------------
    def scroll_up(distance)
      @display_y = [@display_y - distance, 0].max
    end
  end
  #==========================================================================
====
  # ** Game_Character
  #==========================================================================
====
  class Game_Character
    #--------------------------------------------------------------------------
    # * Get Screen X-Coordinates
    #--------------------------------------------------------------------------
    def screen_x
      # Get screen coordinates from real coordinates and map display position
      #return (@real_x) / 4 #+ 16
      return (@real_x - $game_map.display_x + 3*$game_map.tilemap_zoom_x) / 4*$game_map.tilemap_zoom_x + 16*$game_map.tilemap_zoom_x
    end
    #--------------------------------------------------------------------------
    # * Get Screen Y-Coordinates
    #--------------------------------------------------------------------------
    def screen_y
      # Get screen coordinates from real coordinates and map display position
      y = (@real_y - $game_map.display_y + 3*$game_map.tilemap_zoom_y) / 4*$game_map.tilemap_zoom_y + 32*$game_map.tilemap_zoom_y
      # Make y-coordinate smaller via jump count
      if @jump_count >= @jump_peak
        n = @jump_count - @jump_peak
      else
        n = @jump_peak - @jump_count
      end
      return y - (@jump_peak * @jump_peak - n * n) / 2
    end
  end
  #==========================================================================
====
  # ** Game_Player
  #==========================================================================
====
  class Game_Player < Game_Character
    @center_x= CENTER_X   # Center screen x-coordinate * 4
    @center_y = CENTER_Y   # Center screen y-coordinate * 4
    #--------------------------------------------------------------------------
    # * Scroll Down
    #--------------------------------------------------------------------------
    def update_scroll_down(last_real_y)
      # If character moves down and is positioned lower than the center
      # of the screen
      if @real_y > last_real_y and @real_y - $game_map.display_y > @center_y
        # Scroll map down
        $game_map.scroll_down(@real_y - last_real_y)
      end
    end
    #--------------------------------------------------------------------------
    # * Scroll Left
    #--------------------------------------------------------------------------
    def update_scroll_left(last_real_x)
      # If character moves left and is positioned more let on-screen than
      # center
      if @real_x < last_real_x and @real_x - $game_map.display_x < @center_x
        # Scroll map left
        $game_map.scroll_left(last_real_x - @real_x)
      end
    end
    #--------------------------------------------------------------------------
    # * Scroll Right
    #--------------------------------------------------------------------------
    def update_scroll_right(last_real_x)
      # If character moves right and is positioned more right on-screen than
      # center
      if @real_x > last_real_x and @real_x - $game_map.display_x > @center_x
        # Scroll map right
        $game_map.scroll_right(@real_x - last_real_x)
      end
    end
    #--------------------------------------------------------------------------
    # * Scroll Up
    #--------------------------------------------------------------------------
    def update_scroll_up(last_real_y)
      # If character moves up and is positioned higher than the center
      # of the screen
      if @real_y < last_real_y and @real_y - $game_map.display_y < @center_y
        # Scroll map up
        $game_map.scroll_up(last_real_y - @real_y)
      end
    end
    #--------------------------------------------------------------------------
    # * Set Map Display Position to Center of Screen
    #--------------------------------------------------------------------------
    def center(x, y)
      @center_x= (320/$game_map.tilemap_zoom_x - 16) * 4   # Center screen x-coordinate * 4
      @center_y = (240/$game_map.tilemap_zoom_y - 16) * 4   # Center screen y-coordinate * 4
      max_x = ($game_map.width*$game_map.tilemap_zoom_x - 20) * 128/$game_map.tilemap_zoom_x
      max_y = ($game_map.height*$game_map.tilemap_zoom_y - 15) * 128/$game_map.tilemap_zoom_y
      $game_map.display_x = ([0, [x * 128 - @center_x, max_x].min].max)
      $game_map.display_y = ([0, [y * 128 - @center_y, max_y].min].max)
    end
  end
#--------------------------------------------------------------------------
# * End SDK Enable Test
#--------------------------------------------------------------------------
end

Instructions
Look at the comments^^

Compatibility

Needs the SDK, and the Rewrited Tilemap CLass from SephirothSpawn

Credits and Thanks

- SephirothSpawn for his Tilemap Class