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Captain Spazer

Help with simple math equation, please

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I am incompetent when it comes to math, hoping someone more adept could help me out with this one:

Code for collision detection for 8x8 sprite, need it to be for a 16x8 sprite
 

rem player moves right
   if !joy0right then goto __Skip_Joy0_Right


   if player1x >= _P_Edge_Right then goto __Skip_Joy0_Right


   temp5 = (player1y-1)/8

   temp6 = (player1x-9)/4

   if temp6 < 34 then if pfread(temp6,temp5) then goto __Skip_Joy0_Right

   temp3 = (player1y-8)/8

   if temp6 < 34 then if pfread(temp6,temp3) then goto __Skip_Joy0_Right

__Skip_Joy0_Right


 rem player moves left

   if !joy0left then goto __Skip_Joy0_Left


   if player1x <= _P_Edge_Left then goto __Skip_Joy0_Left


   temp5 = (player1y-1)/8

   temp6 = (player1x-18)/4

   if temp6 < 34 then if pfread(temp6,temp5) then goto __Skip_Joy0_Left

   temp3 = (player1y-8)/8

   if temp6 < 34 then if pfread(temp6,temp3) then goto __Skip_Joy0_Left

 

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