Move Player on touch, help needed!

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Move Player on touch, help needed!

(12 posts) (5 voices)

Started 1 year ago by n0va010
Latest reply from jonathan0382

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n0va010
Member

I've made a post before and got some help but it didn't really do the trick, so now I'm asking again.

I want to be able to do a very simple thing. I want my sprite to move as long as the user touches the screen on a certain position, in a direction based on where the user touches.

Things I've tried and problems I've encountered so far:
-I've tried simply scheduling a method that moves the player, and is unscheduled on TouchEnded. The problem with this was that I was not able to pass on anything to the method to be scheduled. I temporarily solved this by scheduling different methods for every location the user could touch, this seemed very unclean to me though so I deleted it again. It also gave me problems with the touchesMoved method.

-I've tried using a global CGPoint that indicates the "current Direction", so that I could simply schedule a method that calls something like "moveInCurrentDirection", global CGPoints don't seem to be possible though. I've tried and it always gives me an error in assignment or tells me I'm trying to get x and y from something that's not a struct/union when I've clearly defined it before.

I'm really stuck at this point, so any help is greatly appreciated, since I don't know what else I could try here.

Posted 1 year ago #
n0va010
Member

bump?

Posted 1 year ago #
dcthatch
Member

do you mean that you basically want the sprite to follow a touch as long as the finger is still down? the post is not clear, but from what i can make out, you need ccTouchesMoved:withEvent:
please could you be clearer or post a link to the other thread or something

Posted 1 year ago #
n0va010
Member

I'll try to describe it a little better.... I want to have something like a d-pad that covers the entire screen. If you press right, you walk right as long as you hold you finger down. Same for left etc. I've only found tutorials and examples for making the sprite move to your finger's location, but not making it move WHILE you hold your finger down.
Better?

Posted 1 year ago #
n0va010
Member

another bump?

Posted 1 year ago #
hm50
Member

You could "divide" your screen into four different CGRects; left, right, up, and down. Define those rect sizes and positions, then check in ccTouchesBegan to see if the touch is inside one of the rects with CGRectContainsPoint, if so move the player in the direction of the rect that contains the touch.

To move only while touching, set a BOOL to true in touchesBegan, then check for that BOOL in your update method, if true then move your player in that direction.
Then in touchesEnded set the BOOL to false.

Posted 1 year ago #
n0va010
Member

That sounds like a pretty good idea. So in my update method I would have 4 if-checks that check the 4 Bools for all directions, and they trigger the movement for each second?
Is there a tutorial or a reference page for ccTouchesBegan and how I am supposed to check if the touch touches one of my CGRects?
Thanks for your help so far!

Posted 1 year ago #

hm50
Member

In your ccTouchesBegan:

if (CGRectContainsPoint(leftRect, myTouch)){
   moveLeft = TRUE;
} else if (CGRectContainsPoint(rightRect, myTouch)){
   moveRight = TRUE;
} else if (CGRectContainsPoint(upRect, myTouch)){
   moveUp = TRUE;
} else if (CGRectContainsPoint(downRect, myTouch)){
   moveDown = TRUE;
}

In your ccTouchesEnded:

moveLeft = FALSE;
moveRight = FALSE;
moveUp = FALSE;
moveDown = FALSE;

In your update:

if (moveLeft){
    move left code;
}
if (moveRight){
    move right code;
}

.
.
.

That's at least a start...keep in mind that this will not work properly if the rects overlap each other.

Posted 1 year ago #

n0va010
Member

That was pretty much everything I need, thanks again, your help is really appreciated :P
Yeah sure I know that, I basically know how to use cocos2d and Obj-C. I just couldn't think of a concept to realize my controls, but now I can get going :)

Posted 1 year ago #
hm50
Member

Glad to help.

Posted 1 year ago #
azarok
Member

I follow this post because I have a similar issue with my game. I have the sprite that moves like n0va010 said, with 4 different animations, left, right, up and down, and my code is quite similar to the example above. The only different is that I'm using the ccTouchesMoved instead of ccTouchesEnded.
When I drag the sprite (with my finger) the animation doesn't start and the sprite just follow my finger, but when the sprite is in the same position of my finger the animation works.
If I through the sprite, which means that I touch the screen through the sprite and lift my finger off the screen in less than a second, the animation works fine.

I have no idea of how to solve this problem…

Posted 1 year ago #
jonathan0382
Member

Every time you move your finger you are restarting the animation, so it never gets past the first frame - you are restarting it 60 times a second (or whatever your refresh rate is).

Make a BOOL, something like _animating (or whatever you want) and then set it to TRUE and start the animation the first time you touch. Then set it to FALSE when the animation is over.

pseudo:

if(touch_moving && !_animating){
start animation;
update position;
_animating = TRUE;
} else if(touch_moving){
update position;
}

if(touch ends){
stop animation;
_animating = FALSE;
}

Posted 1 year ago #

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