Can remove an object in Tiled map?

albert988 · April 2013

For example, there is a rock in the tiled map and the hero contact it, and I want the rock disappear from the screen

Is there a method to change the visiblitly of the object in the tiled map? Thanks a lot.

Scouser · April 2013

You can use Tilemap:clearTile(x,y).

albert988 · April 2013

@Scouser

Not work well

should I use PRE_SOLVE event to detect whether the hero contact the rock?

hgvyas123 · April 2013

@albert988

you are suppose to pass the tile number in x direction and y direction and not the x and y position or point the easiest way to do so is divide x and y position with tile width and height and use math.floor

albert988 · April 2013

I used Tilemap:clearTile(x,y), but it comes nil error

level.lua:132: attempt to call method 'clearTile' (a nil value)

ar2rsawseen · April 2013

Is it possible you have older Gideros version?

hgvyas123 · April 2013

are you sure Tilemap is not nil?????

at the other hand are you using this one http://giderosmobile.com/forum/discussion/999/tiled-example-with-tile-layer-object-layer-and-box2d-collisions#Item_19

?

albert988 · April 2013

@ar2rsawseen
that's impossible

@hgvyas123
I'm sure Tilemap is not nil because I can get object from it and determine whether it's a rock

may be I'm not code right

hgvyas123 · April 2013

but still there are some chance that you are loosing the reference

albert988 · April 2013

@hgvyas123

you are suppose to pass the tile number in x direction and y direction and not the x and y position or point the easiest way to do so is divide x and y position with tile width and height and use math.floor

I find out that you are right

however I can't get the x and y position of the tile, and how can I get the tilemap instance of the tile ? please help

hgvyas123 · April 2013

can you share some code so i can look

and as i asked b4 r u using this?

http://giderosmobile.com/forum/discussion/999/tiled-example-with-tile-layer-object-layer-and-box2d-collisions#Item_19

Scouser · April 2013

@hgvyas123
I'm sure Tilemap is not nil because I can get object from it and determine whether it's a rock

Albert, how do you get the object to determine if it is a rock?

The reason I ask is that if you can use the Tilemap to determine if the tile is a rock then surely you can just clear the tile you just interrogated.

albert988 · April 2013

here is my tilemap and level code

@hgvyas123
yes, I used that but not the extactly same

@Scouser
I determine it's a rock by its type

thanks u guys~

hgvyas123 · April 2013

i can bet Tilemap is nil and he has found rock from the physics collision just guessing

hgvyas123 · April 2013

ohhh there are multiple layers i assume we always know from which layer we need to remove the tile

put this function in tiled_map

at the end of the init hold all your maps reference like

self.myMap = tilemap --store all maps like this

function TiledMap:clearTileAt(x,y)
	self.myMap:clearTile(x,y) --assuming self.myMap is the correct one from which you need to remove
end

and from main file call this function after calculating the tile number

hgvyas123 · April 2013

also you shoud have to call function like this

myMap:clearTileAt(math.ceil(event.x/32),math.ceil(event.y/32))
where 32 is width and height of my tile

my mistake floor gives little different value

albert988 · April 2013

the next problem is ....the tiled map is moving, and I can't get the event.x and event.y right. Maybe I should store the x and y in the object's body?

hgvyas123 · April 2013

well you are able to find out rock [ i assume rock is made from tiles] than you should have to use the x and y position of that rock

in my example i had copied and pasted code from my test project where i am removing tile on the touch event

OZApps · April 2013

@albert988, @hgvyas, a couple of suggestions

1. Have an offset this is to take care of two issues, one as albert mentioned of moving tilemaps and the other if the tiles are not full screen, i.e. could have some space from the top of the left, the offsetX and offsetY can be used to cater for that.

2. You could have a look at these articles for more information
http://howto.oz-apps.com/2012/11/games-with-grids-tilemaps.html
http://howto.oz-apps.com/2012/12/working-with-grids-part-ii.html

albert988 · April 2013

@OZApps @hgvyas123

thank you guys~the problem solved!!

fxone · April 2013

@all
have you noticed that

TileMap:clearTile(x, y)

starts from:

TileMap:clearTile(2, 1)

not from

TileMap:clearTile(1, 1)

how should be but under Gideros Player on Android and as a standalone exported APK? Under Windows Gideros Player seems that we have good values (1,1) [EDIT: I've recently thought that there is also buggy]
Anyway there are different values on real device and under Windows...
Tested on Gideros Mobile SDK 2012.09.10.

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