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Behavior Scroll Sprite by MouseLoc Behavior

Added on 6/30/1999

 

Compatibilities:
behavior D6_5 D7 D8 Mac PC

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Author: LorenMork

This behavior will move a sprite at a "speed" left or right depending on where the mouseH / cursor is relative to the centerpoint of the stage.

--  ScrollSpriteByMouseLocH

--  This behavior will move a sprite at a "speed"
--  left or right depending on where the mouseH / cursor is
--  relative to the centerpoint of the stage.

--  If the curor is more to the right, it will move the sprite to right.
--  When the cursor is closer to the right edge it
--  will move the sprite faster to the right.

--  If the cursor is more to the left, it will move to left.
--  When the cursor is closer to the left edge it
--  will move the sprite faster to the left.

--  The speed parameter determines how fast it will move,
--  relative to the cursor position on the screen.

--  hacked by
--  Loren Mork
--  Seattle, Washington, 1998
--  LMork@aol.com,
--  LMork@accessone.com

-- properties

property  pi_theSprite     -- Contains the number of the sprite we are moving- integer
property  pi_stageWidth    -- Contains the width of the stage we are on- integer
property  pi_Speed         -- Contains the amount to move each time- integer
property  pi_Stagemiddle   -- Contains the loch of the middle of the stage- integer
property  ps_Speed         -- Contains the string description of speed from parameter   - string

on beginsprite me
  set pi_theSprite   = the spritenum of me
  set pi_stageWidth  = the stageright - the stageleft
  set pi_stageMiddle = pi_stagewidth / 2  
  CHECKSPEED()
end beginsprite

on enterframe me
  if the mouseh >= pi_stagemiddle then  
    set i_amounttomove = (-1 * (pi_stagemiddle - the mouseh))/ pi_speed    
    set the loch of sprite pi_theSprite = the loch of sprite pi_theSprite
    + i_amounttomove    
    if the left of sprite pi_theSprite > pi_StageWidth then
      set the loch of sprite pi_theSprite  = 0 - (the width of
      sprite pi_thesprite / 2)
    end if
    
  else
    
    set i_amounttomove =  (pi_stagemiddle - the mouseh) / pi_speed    
    set the loch of sprite pi_theSprite = the loch of sprite pi_theSprite
    - i_amounttomove    
    if the right  of sprite pi_theSprite < 0 then
      set the loch of sprite pi_theSprite  = pi_stagewidth +  
      (the width of sprite pi_thesprite / 2)
    end if    
  end if
end enterframe


on checkspeed me
  case ps_speed of
    "fastest" :                  set pi_speed = 1
    "veryfast" :                 set pi_speed = 3
    "prettyfast":                set pi_speed = 5
    "fast":                      set pi_speed = 7
    "fastestmedium" :            set pi_speed = 9
    "fastmedium" :               set pi_speed = 11
    "medium":                    set pi_speed = 15
    "slowmedium":                set pi_speed = 20
    "slower":                    set pi_speed = 30
    "slow":                      set pi_speed = 40
    "really slow":               set pi_speed = 50
    "slowest":                   set pi_speed = 75
    "molasses":                  set pi_speed = 100
    "slug":                      set pi_speed = 150
    "slug in molasses":          set pi_speed = 200
    "cold slug in molasses":     set pi_speed = 300      
    otherwise                    set pi_speed = 11      
  end case
end checkspeed me

on getPropertyDescriptionList me
  set pl_proplist = [:]  
  addProp pl_proplist,#ps_Speed,[#default:"fastmedium",
#format:#string,#range: ["fastest","veryfast","prettyfast", "fast",
"fastestmedium" , "fastmedium", "medium", "slowmedium", "slower", "slow",
"really slow","slowest","molasses","slug", "slug in molasses", "cold slug in
molasses"] ,#comment:"How fast should the sprite move?"]  
  return pl_proplist
end  getPropertyDescriptionList

on getBehaviorDescription me
  set ps_string  to "ScrollSpriteByMouseLocH"&return&"By Loren Mork. LMork@aol.com, LMork@accessone.com, Seattle/ Washington/U S A."&return&return& "This behavior will move a sprite at a speed left or right depending on where the mouseH / cursor is relative to the centerpoint of the stage."&return&return&"If the curor is more to the right, it will move the sprite to right. When the cursor is closer to the right edge it will move the sprite faster to the right. "&return&return&"If the cursor is more to the left, it will move to left. When the cursor is closer to the left edge it will move the sprite faster to the left." &return&return&"The speed parameter determines how fast it will move relative to the cursor position on the screen."&return
  return  ps_string
    
end getBehaviorDescription me

 


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