Hy there!

Perhaps, it happened with all of you, that when you wanted to make an isometric game, you've put in an event, that when Hero and the Enemy colides, play an animation and lose life. This works fine, but the only problem is, that the colision command works even if the enemies head reaches only your foot.

There's two ways to solve this problem... the first way, and many would say the easier way, is to, make two Active Objects, put them on the stomach of the two other objects, make an event that always set position to where they belong, and make these two objects colide... but this way, the size of your game will get bigger... there's another way to solve this problem. It's a bit complicated, but if you want to make a big game, this will help clean up space. Instead of puting "when HERO colides with ENEMY" put these for lines: "
-When POSITION X of ENEMY is greater or equal to POSITION X of HERO + 10(depends on the size of the sprites)
-When POSITION X of ENEMY is less or equal to POSITION X of HERO - 10(depends on the size of the sprites)
-When POSITION Y of ENEMY is greater or equal to POSITION Y of HERO + 10(depends on the size of the sprites)
-When POSITION Y of ENEMY is greater or equal to POSITION Y of HERO - 10(depends on the size of the sprites)
and after this put in the effect.

You can use the X and Y in many different ways too... like if you want to make a rain effect on an isometric ground, you just put in:
-When POSITION Y of RAINDROP is greater then THE FIRST Y WHERE THE RAIN CAN FALL(on a 800 x 600 screen it is between the interval of (0,600))
-When POSITION Y of RAINDROP is less then THE LAST Y WHERE THE RAIN CAN FALL(on a 800 x 600 screen it is between the interval of (0,600))
-When RANDOM(15(depends on how big your level is)) is equal with 1.
Make the RAINDROP destroy or something like this.

Or when you want to walk under a neutral player, you should put:
-When Y of HERO is greater then Y of NEUTRAL PLAYER
Bring to front HERO

This goes to, if you want to walk above a neutral player with the difference that the Y of the HERO must be less then the Y of the NEUTRAL PLAYER, and you must put Bring to back HERO.

So use the X and Y offten when you make an isometric game, so, this way you don't have to put in annoying active objects, that are almost useless, and are only taking up the space.

Hope this article will help, some of you, it helped for me on my game...

Sorry for the bad english, and have a nice day!

Jatzek