Discussions

You could use a for loop to remove multiple pixels at a time. However, the two big problems would be (1) as pixels get removed, the chance lessens in hitting one that needs removed; and (2) determining when ALL pixels have been removed would not be an easy matter. Fading might be a favorable alternative -- gradually diminishing the transparency of the entire image. Or, maybe a combination of the two -- that way, at least the time for total removal is limited to a specific amount.

thank you

The Scroller class should never need modification. My tutorial shows how to allow scrollActor roaming before scrolling using specific code in the scroll method in your MyWorrld class. It should be a simple m

No, I mean the entire listing of all lines of codes in both classes (in rocket and bullet classes).

Thanks a lot, now it works, i'll pay more attention with the if commands.

(1) getWorld returns a World object -- not a GreenfootImage object, which you can set the drawing color of; (2) setting the drawing color does not automatically change anything that was previously drawn; you must redraw the line after setting the new color;

A couple of cars still over lap, but other than that, my police car works and the most of them don't overlap anymore :). Thank you!

ok thank you

thanks for telling me about classes tho

With what is given, all that can be provided is a bit of pseudo-code: if (timeToMove) move(); Obviously, this is insufficient. Please provide more details and some attempted code.

OH wait, you're right... I tried another way and it works much better and keeps the "hopping" at a constant distance! My bad :P

nvm

Remove line 34 (does nothing but create an unused object). The condition on line 20 will never evaluate true as only zero (0) can be randomly returned using one (1) on line 19.

If you want other things to happen while the fading is taking place (not specified), you cannot use a while loop. To fade, you must repeatedly change the transparency value (you consistently set a zero value).

thx