Erase all tiles from tile, except for tiles specified?

Is there a way of clearing ALL of the tiles from a tilemap, except for specific tiles listed in a variable? I'm using R0J0hound 's example: https://dl.dropboxusercontent.com/u/542 ... lemap.capx but in my situation, it would be much more efficient to clear all of the tiles, besides the few I need, rather than clear a selected few. I thought I'd start a new thread as the last tilemap thread got a bit away from the original point.

Changed the title to be more descriptive.

You should be able to do it by changing the logic around. In it able to open the capx right now so this may be a bit different. You don't even need a variable. You could take a loop over all the tiles and make these sub-events to keep for example tiles 4 and 6.

Tile=4

Else

Tile=6

Else

--- erase

Or if you still wish to use a variable just structure the text variable used for the list like this. Comma seperated and starting and ending with a comma.

Global text keep=",4,6,"

Then use a sub-event like this:

System compare: find(keep, ","&tile&",") = -1

--- erase

You should be able to do it by changing the logic around. In it able to open the capx right now so this may be a bit different. You don't even need a variable. You could take a loop over all the tiles and make these sub-events to keep for example tiles 4 and 6.

Tile=4

Else

Tile=6

Else

--- erase

Or if you still wish to use a variable just structure the text variable used for the list like this. Comma seperated and starting and ending with a comma.

Global text keep=",4,6,"

Then use a sub-event like this:

System compare: find(keep, ","&tile&",") = -1

--- erase

Thanks! Here's a screencap of what I have so far, it WORKS, it's just going to be inefficient when I fill up those tiles:

I'll try and use your suggestion, I'm not sure if the screengrab is of any use to you. I have three tilemaps, one for display, one for solids and one for jump-thrus.

R0J0hound trying to work out what &tile& should be?

Replace tile with the expression to get a tile at a location.

EDIT: This works!

Thank you R0J0hound! Hopefully that looks okay?

TileAt(loopindex("x"),loopindex("y"))

TileAt(loopindex("x"),loopindex("y"))

Sorry, got it myself in the end!