Scratch

I've been trying to do the very same thing. No luck yet.

Loop-de-loop: Make the sprite turn around.

Homing attack: Use the glide block, and a variable named 'homing_selected'

Anyone?

Maybe download tomicools project and use that script.

Use this for the homing thing:

when gf clicked
forever
     if <(homing) = [1]>
          glide [1] to (target)
end
end

ok, for the loop with just horizontal (x) scrolling:

when gf clicked
forever
  if <touching [loop v]?>
    point in direction (90) //In case you weren't already
    repeat until <(scroll x) < ((center x of loop) - (1))>
      change [scroll x v] by (normal rate here)
    end
    repeat (x)
      change [scroll x v] by ((normal rate here) * ([sin v] of (direction)))
      change y by ((normal rate here) * ([cos v] of (direction)))
      turn ccw (y) degrees
    end
    repeat ((250)/(normal rate here))
      change [scroll x v] by (normal rate here)
    end
  end

y can be calculated by taking the inside radius of your loop (r) and  your normal rate (n):

y = 360*n/(2*pi*r)

basically, you're calculating your circumference, finding out how much of that is covered by each move, and converting to degrees from revolutions.

to calculate x:

x = 360/y
   or
x = 2*pi*r/n

This should work...if not, let me know and I'll see if I can come up with an example.

Last edited by AtomicBawm3 (2012-04-09 23:33:53)

here, for a homing attack,this is how you do it
WHEN ? KEY PRESSED
IF ? KEY PRESSED
REPEAT 5 TIMES
CHANGE SCROLL BY 5