how can I know what's the coordinate of screen center ?

jasonshow

my player is running,and screen always go right,
how can I know what's the coordinate of screen center ?
thanks.

tenrdrmer

(0,0) is the bottom left corner of the scene.

So if your scene is 480x320 center would be (240,160)

That what your wanting to know?

jasonshow

yes,I know that.

but my screen is bigger than 480x320,(maybe 100000x320)
and I make it auto scroll to right.
so, how can I know what's the coordinate of screen center?
thanks.

cbt

On the actor you are using to control the camera;

Display Text:
Self.X
Self.Y

And make sure to make the "camera area" as tiny as possible on the editor.

dunkelgeist

You need to access your Scene attributes for that.

So it may be like this:
1. Make a new actor, let's say centerSearcher
2. Put it on your Scene
3. Double-Click the Scene actor NOT THE PROTOTYPE and click the locker to acces its behaviors.
4. Now you can access Scene attributes from there and pass them to Game attributes if needed.

jasonshow

cbt,your method works, but because of actor's hieght,so, there's a little floating.

dunkelgeist,seems good, but what's attribute of scene that I realy need ?
thanks.

dunkelgeist

CurrentScene.Size.Width / 2
CurrentScene.Size.Height / 2

Will give you the coordinates you need for X and Y ;-)

That is if you need the permanent true center of your Scene, otherwise, if you want to have the center of the visible area I'll probably stick with cbt method but adding an additional actor constrained in position to the camera, so you can set any size you want.

jasonshow

dunkelgeist,
it will get the whole scene's center,
but I need is this screen's center.
(the screen is scrolling to right)

dunkelgeist

I've edited my previous post, sorry for the misunderstood.

dunkelgeist

Maybe you can even play with Camera.Origin and Camera.Size to get the point, I don't really know how Camera.Origin works and I'm on a pc without GameSalad right now to test it but maybe...

If Camera.Origin.X and Y mark the camera center you're good to go.

If they mark the bottom-left corner then you could do something like:
Camera.Origin.X + Camera.Size.Width/2
Camera.Origin.Y + Camera.Size.Height/2

Again, just guessing, but hope it helps.

jasonshow

thanks dunkelgeist,
it works!