shooting from sprite to mouse pointer

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2D All the way! / shooting from sprite to mouse pointer

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Jungle burger

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Joined: 2nd Apr 2005

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Posted: 2nd Apr 2005 21:28

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Can anyone help me with this please? I'm creating a 2d scrolling platform shooter. Where the character can shoot in any direction dependant on the position of the mouse. How do I get the bullet to move to the mouse from the characters centre, I presume that I should use the ATANFULL command to get the angle and work out the direction from that, but i'm stumped as where to start. has anyone got any ideas, thanks in advance

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spooky

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Joined: 30th Aug 2002

Location: United Kingdom

Posted: 3rd Apr 2005 08:43

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This should get you started. Move player around with cursors and left mouse button to fire bullet at mouse pointer. You can shoot again when bullet goes off screen.

+ Code Snippet

sync on : sync rate 60
x=screen width()/2
y=screen height()/2
s=1
b=0
do
   cls
   mx=mousex()
   my=mousey()
   if leftkey() then dec x,s
   if rightkey() then inc x,s
   if upkey() then dec y,s
   if downkey() then inc y,s
   circle x,y,5
   a#=1.0*atanfull(mx-x,my-y)
   x2=newxvalue(x,a#,20)
   y2=newzvalue(y,a#,20)
   line x,y,x2,y2
   if mouseclick()=1 and b=0
      bsx=x
      bsy=y
      ba#=a#
      bd#=1.0
      b=1
   endif
   if b=1
      inc bd#,2
      bx=newxvalue(bsx,ba#,bd#)
      by=newzvalue(bsy,ba#,bd#)
      circle bx,by,2
      if bx < 0 or bx > screen width() or by < 0 or by > screen height()
         b=0
      endif
   endif
   sync
loop

Boo!

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2D All the way! / shooting from sprite to mouse pointer