Rotate Sprite - How so I point sprite at another set of coordinates

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2D All the way! / Rotate Sprite - How so I point sprite at another set of coordinates

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Bilboo

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Joined: 5th Dec 2003

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Posted: 13th Jan 2004 01:27

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Hi,

I've got a sprite which I'd like to point (using ROTATE SPRITE) in the direction of any given X,Y coordinates.

Can anyone help with the best method to do this please?

Many thanks

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the_winch

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Joined: 1st Feb 2003

Location: Oxford, UK

Posted: 13th Jan 2004 03:01

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Use atanfull()

simple example

+ Code Snippet

hide mouse : disable escapekey
create bitmap 1,10,10
line 0,10,5,0
line 5,0,10,10
get image 1,0,0,10,10,1
delete bitmap 1

sprite 1,(screen width()-5)/2,(screen height()-5)/2,1 :
sprite 2,0,0,1
offset sprite 1,5,5 : `center sprite
offset sprite 2,5,5 : `mouse sprite

repeat
  sprite 2,mousex(),mousey(),1
  rotate sprite 1,atanfull(sprite x(2)-sprite x(1),sprite y(1)-sprite y(2))
  rotate sprite 2,atanfull(sprite x(2)-sprite x(1),sprite y(1)-sprite y(2))-180
until escapekey()

dbpro : 2ghz p4m : 512mb : geforce 4 4200 go

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Bilboo

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Joined: 5th Dec 2003

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Posted: 13th Jan 2004 21:30

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Thanks Winch, that's exactly what I needed.

Cheers

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2D All the way! / Rotate Sprite - How so I point sprite at another set of coordinates