Finding the tile to your right

[toaster468]

I am making a game and it is going pretty good, but I have one part left to work on, collisions. I am using the Tile Scrolling tutorial's method of displaying the tiles. I need to find the tile to the right of the player .
(note the red is the player, and the yellow are the walls)

You guys might remember me from last year, I got a little better, and I am starting smaller so hopefully this one will work.

Thanks in advance.

[Taehl]

The code for that might be (I have to guess, since you didn't post a .love)

Code: Select all

local tileToRight = map[player.x+1] and map[player.x+1][player.y]

[toaster468]

What does this return? The tile number? like 0, 1, 2, 3 ect.?

[Jasoco]

Yeah. Here, create a function to return the value of a tile easily:

Code: Select all

function checkTile(x, y)
  return map[x][y]
end

Where map is whatever your array is called etc...

And then call it like so for Left, Right, Up and Down:

Code: Select all

checkTile(x-1, y) --Left
checkTile(x+1, y) --Right
checkTile(x, y-1) --Up
checkTile(x, y+1) --Down

Where x and y are the points you want to chedk. If the player is x, y then left would be x-1, right x+1, up y-1 and down y+1.

It will return whatever data you have stored in that tile. Like if you use 0 or 1 for collisions or whatever. Maybe 2 for water, 3 for lava, etc, etc...

Get it?

[toaster468]

-snip-

[toaster468]

I am getting this error. This is my code:

Code: Select all

if tonumber(checkTile(map_x+1, bity)) == "1" then
		love.event.push("q")
end

Or alternatively:

http://dl.dropbox.com/u/27844356/bitdod ... 0Copy.love

[slime]

The checktile function (and maybe the rest of your code) needs to account for when you input an x,y coordinate that's not within the bounds of the tile arrays, e.g.

Code: Select all

function checkTile(x, y)
  if map[x] and map[x][y] then
    return map[x][y]
  else
    return "cheater!"
  end
end

or whatever.

[Robin]

Also, the following code is wrong:

Code: Select all

	if tonumber(checkTile(map_x+1, bity)) == "1" then

		love.event.push("q")

	end

Strings are not equal to numbers, so that expression will never return true.

Fix:

Code: Select all

	if checkTile(map_x+1, bity) == 1 then

		love.event.push("q")

	end

That still doesn't fix your crash, but slime's suggestion will probably help.

[toaster468]

I am not even getting any reaction from the program. As far as I know I am using the code the right way, but nothing is happening.

Newest code:
http://dl.dropbox.com/u/27844356/bitdod ... 82%29.love