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Code Snippets / Bounce Calculation. Dbpro.

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coolgames

Years of Service

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Joined: 26th Sep 2005

Location: Oregon, USA

Posted: 6th Mar 2006 23:15

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Here is a function that will calculate the new yangle of a ball after it bounces off a wall. You specify the angle of the wall and ball. The angles are the y angles. So the wall will be strait up and down.

Here is the code

+ Code Snippet

function bounce(walla,balla)
   walla=wrapvalue(walla)
   balla=wrapvalue(balla)
   k1=wrapvalue(walla+180)
   if walla<k1
      if balla<walla then dec walla,180:dec k1,180
      if balla>k1 then inc walla,180:inc k1,180
   else
      if balla<k1 then dec walla,180:dec k1,180
      if balla>walla then inc walla,180:inc k1,180
   endif
   k2=abs(walla-balla)
   k3=abs(k1-balla)
   if k2<k3
      if walla<balla
         result#=k1-k2
      else
         result#=k1+k2
      endif
   else
      if walla<balla
         result#=walla+k3
      else
         result#=walla-k3
      endif
   endif
endfunction result#

I have no Idea if it works with dbclassic. I don't have it.

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Code Snippets / Bounce Calculation. Dbpro.