Pulse Blend a Sprite

 

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Cyclically fades a sprite up and down when the sprite is rolled over.

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-- This behavior repeatedly makes a sprite fade and brighten -- in opacity when the sprite is rolled over. -- Works with any sprite that has a blend property. ------------------------- -- Ken Loge 02-15-2002 -- http://dreamsteep.com ------------------------- property pActivatePulseEffect -- whether the pulse effect is turned on or off property pBlendValueState -- if the sprite is currently dimming or getting brighter property pFadeStep -- the rate of the sprite blend change on beginSprite me   pBlendValueState = #getDimmer   pActivatePulseEffect = FALSE end on getPropertyDescriptionList me   list = [:]   addProp list, #pFadeStep, [#comment: "Fade rate of sprite:", #format: #integer, #default: 5]   return list end on exitFrame me   pulseSprite(me) end on mouseEnter me   if pActivatePulseEffect = FALSE then     pActivatePulseEffect = TRUE   else     pActivatePulseEffect = FALSE   end if end on mouseLeave me   if pActivatePulseEffect = FALSE then     pActivatePulseEffect = TRUE   else     pActivatePulseEffect = FALSE     sprite(me.spriteNum).blend = 100   end if end -- pulse blend a sprite cyclically using a simple state switcher on pulseSprite me   if pActivatePulseEffect = TRUE then     if pBlendValueState = #getDimmer then       sprite(me.spriteNum).blend = sprite(me.spriteNum).blend - pFadeStep       if sprite(me.spriteNum).blend < pFadeStep then pBlendValueState = #getBrighter     end if          if pBlendValueState = #getBrighter then       sprite(me.spriteNum).blend = sprite(me.spriteNum).blend + pFadeStep       if sprite(me.spriteNum).blend > (100 - pFadeStep) then pBlendValueState = #getDimmer     end if   end if end