LÖVE

Posted: **Sat Nov 19, 2016 7:06 pm**

hello everyone,
im having a problem figuring out what tile is next to player.
i need to figure out if a tile right, left, up or down to the player is for ex. a wall or a water tile.
ive tried everything i could think of but it just wont work. here is what im doing right now:

Code: Select all

for k, v in ipairs(painter.tiles) do
      if v.x/tilesize == math.floor(player.x/tilesize) and v.y == math.floor(player.y/tilesize)-1 then
        if v.name == "water" then
          print("water")
        end
      end
 end

if you are standing directly below a water tile, it should print water but it doesnt do that. i dont know why.
here is my .love file, hope anyone could be of help. thanks in advance. press space to do the tile check.

Posted: **Sat Nov 19, 2016 7:54 pm**

You forgot to divide v.x by tilesize.

Code: Select all

if v.x/tilesize == math.floor(player.x/tilesize) and v.y/tilesize == math.floor(player.y/tilesize)-1 then

But in a tiled-based game like this it's best to keep the tile's mapposition stored.

So something like

Code: Select all

local newtile = {
  r=tile.r,
  g=tile.g,
  b=tile.b,
  color=color.color,
  x=tile.x*tilesize,
  y=tile.y*tilesize,

  map_x=tile.x
  map_y=tile.y
  
  img=img,
  w=tilesize,
  h=tilesize,
  name=color.name,
  collide=color.collide}

If you also do this for the player, it will be way easier to check tiles surrounding you.

Posted: **Sat Nov 19, 2016 8:20 pm**

thank you!

Posted: **Sun Nov 20, 2016 5:30 am**

Doctory, how about:

Code: Select all

local floor = math.floor
local tilesize = painter.tilesize

function painter.positionToTile(x, y)
  return floor(x/tilesize), floor(y/tilesize) -- no rounding
  -- return floor(x/tilesize + .5), floor(y/tilesize + .5) -- with rounding
end

function painter.tileToPosition(tx, ty)
  return tx*tilesize, ty*tilesize
end

This way your code doesn't have to access the "tilesize" global from everywhere.

Posted: **Sun Nov 20, 2016 9:16 am**

ivan wrote:Doctory, how about:

Code: Select all

local floor = math.floor
local tilesize = painter.tilesize

function painter.positionToTile(x, y)
  return floor(x/tilesize), floor(y/tilesize) -- no rounding
  -- return floor(x/tilesize + .5), floor(y/tilesize + .5) -- with rounding
end

function painter.tileToPosition(tx, ty)
  return tx*tilesize, ty*tilesize
end

This way your code doesn't have to access the "tilesize" global from everywhere.

never really thought about that, thanks for the tip!

LÖVE

Finding out what tile is next to the player

Finding out what tile is next to the player

Re: Finding out what tile is next to the player

Re: Finding out what tile is next to the player

Re: Finding out what tile is next to the player

Re: Finding out what tile is next to the player