[GM]Simple Grid Tutorial and Code , This is an easy and quick way to set up grid movement for your game. Options

[LarsonCreativity]

I'm working on a new game, and it involves grid movement. I first set it up using a bunch of if statements, but then a friend helped me realize there was an easier way. I thought it was neat, and could help some people out. Also, there are many other things you can do with this method as well. Let me know what you think, or if you need help understanding something better.

This should go in the Step event for the object you are controlling.

CODE

x=x
y=y

//This is the amount of that you move each time
mspace = 32


/*These are the grid limits, and they set the grid boundries.  Right now their for a 10x10 grid.  
If your grid is bigger, change the xrbound and the ydbound*/

xlbound = mspace*0
xrbound = mspace*9  
ydbound = mspace*9
yubound = mspace*0

y = min( max( y - mspace * keyboard_check_pressed( vk_up )+ mspace * keyboard_check_pressed( vk_down ), yubound ), ydbound )

x = min( max( x - mspace * keyboard_check_pressed( vk_left )+ mspace * keyboard_check_pressed( vk_right ), xlbound ), xrbound )

~LC~

This post has been edited by LarsonCreativity: Feb 28 2010, 10:59 AM

[The Law G14]

Does this go for rmxp or rmvx? Also, what exactly is grid movement?
Sorry if I'm being a pest.

[LarsonCreativity]

Sorry, I guess I forgot to mention this is in GML (Game Maker Language). This is simple 2D grid movement. Basically, for my game at least, I created an object which was basically like a frame. I put this code in the Step event and I was able to move the frame like it was situated on a grid. This is something like 2D Fire Emblem games.

Sorry for not explaining as well as I should have.

~LC~

[The Law G14]

That's alright, it looks great! But I don't have game maker, so I hope this becomes useful for some other people.

[LarsonCreativity]

That's fine. I realize the GM users here are few and far apart.

~LC~

[HeroOfHyla]

Ah, so this is for panning the map on a grid using the arrow keys? Neat script. I don't think I'd ever really have a use for it (and even if I did, I absolutely hate using stuff other people made for some reason), but I'm sure someone will be able to use it. Thanks for contributing!

[LarsonCreativity]

Originally, I just had a bunch of if statements. This works better though, and I just added those variables in and voila. I am making a Fire Emblem engine with it, and it defiantly does the trick.

(and even if I did, I absolutely hate using stuff other people made for some reason)

Same here, but this could defiantly also help get people thinking about other ways to do something like this. After I figure this out, I realized there could be a lot of possibilities using this kind technique.

~LC~

This post has been edited by LarsonCreativity: May 18 2009, 06:24 PM

[Rukiri]

You know you can "Snap" it to a grid right?
But this works to.