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Projectile lingo issues in Director

Apr 17, 2012 10:52 AM

Tags: #lingo #director #projectiles

I'm trying to get a projectile to move from character location, towards mouse location in a game.


Me and a friend are working on it together, and he looked up some stuff on vectors and this is what he came up with:

property mySprite

property myPrevLoc

global myVector

 

 

on beginSprite me

  set mySprite to sprite(sprite(2))

  set myVector to point (0, 0) -- USING POINT FORMAT

end

 

 

on prepareFrame me

  if the mousedown then

    set myVector to void

    set myPrevLoc to point (sprite(1).locH, sprite(1).locV)

    set the loc of mySprite to myPrevLoc

  else if voidP (myVector) then

    -- THROW BALL

    set spriteLoc to point (the mouseH, the mouseV)

    set the loc of mySprite to spriteLoc

    set myVector to (spriteLoc - myPrevLoc)/20

   

  else

    -- MOVE BALL

    set spriteLoch to the loch of myPrevLoc + myVector

    set spriteLocv to the locv of myPrevLoc + myVector

    set the loc of sprite mySprite to spriteLoc

  end if

end

 

it works to a degree. But there's a few problems. The projectile appears at character location for a second, and then spawn from mouse loc, though it travels in the correct location. Also, the further the mouse is from the character, the faster the projectile moves.

 

As a second request (if you have the time!) I want the projectile to stop moving if it collides with certain objects (like a wall or what have you).  Any idea on how I could get this to work?
Thanks!

 

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