Attempting to make multiple copies of sprites.

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MuseEffigy

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Posted: 18th Aug 2010 11:19

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Hi there, first time poster here.

I currently have a firing mechanism in my game whereby a block expands slowly in the direction the player is facing and pushes the enemies in the opposite direction. I have a sprite that I would like to use to make it look like a beam blast. What I want to do is to have the sprite copy itself along the path of the "beam" so as to create a contiguous line of sprites when the user fires. Is this possible, or am I just going about this the wrong way? My other option is to make it look instant by simply extending the sprite with image editing, but it looks very messy.

Thanks!

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Grog Grueslayer

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Playing: Green Hell

Posted: 18th Aug 2010 18:48

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It's easier to use STRETCH SPRITE. The only bad thing is if the image isn't really designed for it it'll look bad.

+ Code Snippet

` Make an image
ink rgb(255,255,0),0
box 0,0,100,25
box 0,75,100,100
ink rgb(255,0,0),0
box 0,25,100,75
get image 1,0,0,100,100,1

` Show the sprite
sprite 1,0,100,1

` Start the stretch at normal
Stretch=100
` Set a timer
tim=timer()

repeat

 ` Check if it's time to stretch the sprite
 if timer()>tim+10
  ` Stretch the sprite
  stretch sprite 1,Stretch,100
  ` Increase the stretch
  inc Stretch
  ` Reset the timer
  tim=timer()
 endif

until Stretch=500

wait key

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LBFN

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Location: USA

Posted: 18th Aug 2010 19:11 Edited at: 18th Aug 2010 19:11

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I also think that STRETCH SPRITE is the way to go, but you will have to reposition the sprite as it stretches.

So many games to code.......so little time.

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MuseEffigy

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Posted: 19th Aug 2010 02:20

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Thanks a lot! Stretching the sprite worked out pretty well, although there are now a few collision issues to work out. Thanks again!

-S

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Neuro Fuzzy

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Posted: 19th Aug 2010 07:55

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Quote: "I also think that STRETCH SPRITE is the way to go, but you will have to reposition the sprite as it stretches."

not if you adjust the sprite's center offset, right?
(i say "right" because I'm only like 75% sure and don't want to look it up)

Is't life, I ask, is't even prudence, to bore thyself and bore thy students?

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Grog Grueslayer

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Joined: 30th May 2005

Playing: Green Hell

Posted: 19th Aug 2010 09:43

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It shouldn't normally because it stretches on the right and/or bottom of the sprite. The top and left of the sprite remain the same (where the sprites x and y coordinates are).

+ Code Snippet

` Make an image
ink rgb(255,255,0),0
box 0,0,100,25
box 0,75,100,100
ink rgb(255,0,0),0
box 0,25,100,75
get image 1,0,0,100,100,1

` Show the sprite
sprite 1,screen width()/2,screen height()/2,1

` Start the stretch at normal
Stretch=100
` Set a timer
tim=timer()
ink rgb(255,255,255),0

repeat

 text 0,0,"SpriteX = "+str$(sprite x(1))
 text 0,20,"SpriteY = "+str$(sprite y(1))

 ` Check if it's time to stretch the sprite
 if timer()>tim+10
  ` Stretch the sprite
  stretch sprite 1,Stretch,Stretch
  ` Increase the stretch
  inc Stretch
  ` Reset the timer
  tim=timer()
 endif

until Stretch=500

wait key

If you do use OFFSET SPRITE it could stretch in any direction but because the center of the sprite is the offset it never changes coordinates either.

+ Code Snippet

` Make an image
ink rgb(255,255,0),0
box 0,0,100,25
box 0,75,100,100
ink rgb(255,0,0),0
box 0,25,100,75
get image 1,0,0,100,100,1

` Show the sprite
sprite 1,screen width()/2,screen height()/2,1
offset sprite 1,50,50

` Start the stretch at normal
Stretch=100
` Set a timer
tim=timer()
ink rgb(255,255,255),0

repeat

 text 0,0,"SpriteX = "+str$(sprite x(1))
 text 0,20,"SpriteY = "+str$(sprite y(1))

 ` Check if it's time to stretch the sprite
 if timer()>tim+10
  ` Stretch the sprite
  stretch sprite 1,Stretch,Stretch
  ` Increase the stretch
  inc Stretch
  ` Reset the timer
  tim=timer()
 endif

until Stretch=500

wait key

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Neuro Fuzzy

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Posted: 19th Aug 2010 10:23

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right, so if you "offset sprite" where you want it you shouldn't have to change the position to compensate for scaling

Is't life, I ask, is't even prudence, to bore thyself and bore thy students?

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LBFN

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Joined: 7th Apr 2007

Location: USA

Posted: 19th Aug 2010 17:49

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It seems that if you have an image with black (transparent) space on the sides of it, that the stretch doesn't work right and it would have to be repositioned. By grabbing an image that has no black space on the side, it works fine.

So many games to code.......so little time.

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