SceneWindow2D and it's position and subsequent coordinates

#1 If you're talking about the objects in the scene, then as the camera moves, the coordinates at a fixed location on your monitor are changing. If your camera centers on your player, the camera is 1000 units wide, and the player has a X-coordinate of 75, then the left-hand side will be at 75-500 = -425 and the right-hand side will be at 75+500 = 575.

If you're talking about GUI objects (say, a GuiButtonCtrl), then the coordinates at a fixed location on your monitor stays the same. If your sceneWindow2D's GUI coordinates are at (0,0) and extend to (800,600), then as the camera moves, these coordinates do not change and the upper land-hand coordinates will always be (0,0).

#2 Specifically what I am asking is, are the camera's view coordinates always the same? is 0,0, relative to the camera always 0,0?



or if the camera move 10 units to the right, does 0,0 become 10,0?

#3 (0,0) will always be (0,0) in the scene. No matter where the camera is, if you place objects at (0,0), they'll be at the same spot in the scene.

Of course, when you move the camera 10 units to the right, (0,0) has moved 10 units to the left on your computer's monitor.

So to the answer the question "are the view coordinates always the same", the same is no. If your camera centered around (0,0) and then moved 10 units to the right, you can't add a new object at (0,0) and have it appear at the center of the screen. It will appear 10 units to the left.

If you need to find the coordinates that the camera is seeing (say to find "stage left"), there are several functions in the scene window to do that.

#4 So would it be possible to link the players position to the sceneWindow instead of worldPosition?

#5 It depends upon your game. If your object needs to interact in ANY way with the world (even if it's not collisions, but something as mundane as objects passing in front of it), then you cannot.

#6 hmm, could you explain why?

See the reason is, for me, that I want my player's world limits to be determined by the camera view, trick is the camera is constantly moving along the xAxis.

#7 ...

Perhaps someone could help me out with this.

I am trying to wrap my head around how I would have my player use the camera view as his world limits. The only trick in mine is that the camera moves at xUnits=20.

getCurrentCameraPosition()
will get the current camera positon. But I am unsure how to plug that in, relate it to the object. The best my head can do right now is

function playerClass::getWorldPosition(%this)
{
$playerClass.getCurrentCameraPosition()
{
	if at left limit clamp

        if at right limit clamp
}

sorry for posting this weak code but it is late. If anyone has some easy pointers for me I would gladly take them


Thanks.

#8 Hey, I don't have TGB close by to try this one out, nor am I a great coder.. but assuming getCurrentCameraPosition() returns the center of the sceneWindow in world coords, take that value minus the player's world coords position. Then if that value is bigger than getCurrentCameraSize() / 2 it means the player is out of the camera's view.

I'm assuming a few things here that I'm not sure of but hope this will get you going anyway.

#9 hmm, that actually seems pretty logical. My brain is fried right now and its Saturday, the chances of me happily coding this today are not so good. May wait till Monday But thanks, For some reason this problem was a parallax I could not get my head around, but yours seem so easy.

Thanks man!


[:]...CK

#10 Hi I have just made a code, a behavior, which seems much simpler compared to having greater success, but It still does not work, can some one go over this and tell me where I am going wrong?


Thanks.
R

#11 It looks like the behavior you've posted here will work just fine! It is simpler than greater success, but nothing looks wrong with it.

Hope that helps!

#12 Definite, I guess i have just been underestimating myself. Kinda staying in the womb, guess I needed to get out and explore the world of behaviors and their simplicity.




;)