Lacking Information II

[AWizardDidIt]

Awhile back, I posted my original "Lacking Information" topic and got this reply, among others:
http://love2d.org/forums/viewtopic.php? ... 902#p19456

Now to humiliate myself a bit: After getting the time I needed to try out this mapping approach, I attempted a map with four 16*16 tiles with this method, putting everything into the main.lua file to try and see if it would work 'out-of-box', but what I ended up with is a completely blank window, and while it is a very nice window, I'm hoping I'll get some sort of idea of why it didn't contain the intended testmap. I apologize for how ridiculous my mistake/whatever will undoubtedly be, but I haven't had a great deal of time to work with LÖVE (or Lua, really, though I have a bit of experience with Python and C, not that I'd use pygame or c to do this stuff).

If I can get this resolved, it should end my troubles once and for all, since I've already got a fair idea of how to manage other things (and can more-easily find samples/tutorials/etc for the things I don't). I'd rather not stoop to using a generic tilemap editor such as Tiled or Mappy or whatever, since I seriously dislike relying on things like that when I can do without, so I'm very grateful for any information I can get.

[nevon]

Tiled is pretty great. You should consider using it once you've gotten further.

As for your problem, it'd be helpful if you would post your code.

[AWizardDidIt]

Understood, sorry, here's the main.lua test-file I was using (just to try and get a map to appear):

Code: Select all

tileimages = {
    love.graphics.newImage("tile1.png"),  --Wall tile
    love.graphics.newImage("tile2.png"),  --Floor tile
    love.graphics.newImage("tile8.png"),  --Window tile
    love.graphics.newImage("tile5.png"),  --Column tile
}
tilesize = 16
map = {
   {1,1,3,1,1,1,3,1,1},
   {1,2,2,2,2,2,2,2,1},
   {1,2,2,2,2,2,2,2,1},
   {1,2,2,4,2,4,2,2,1},
   {3,2,2,2,2,2,2,2,3},
   {1,2,2,4,2,4,2,2,1},
   {1,2,2,2,2,2,2,2,1},
   {1,2,2,2,2,2,2,2,1},
   {1,1,3,1,1,1,3,1,1},
}
function love.draw()
   for x, row in pairs(map) do
      for y, tile in pairs (row) do
         love.graphics.draw(tileimages[tile], x*tilesize, y*tilesize)
      end
   end
end

I wouldn't be surprised if this were wrong on five or more levels, honestly. As for Tiled, I am rather familiar with it, but I don't care much for map editors in general (otherwise, I'd probably be using something more like Sphere RPG Engine or something w/ Wine or whatever). Basically, it's just a roughly-assembled/changed copypasta of what I was shown before, just to see if it works. Since it obviously doesn't (but doesn't cough out any errors), I felt the need to ask. I also tried it as two separate files with the function love.draw() in its own file, but that doesn't necessarily work either.

[bmelts]

A few pieces of advice:

The way your table's laid out, I'd recommend switching the order of your for loops - each subtable is a row, and the row's index corresponds to its y value, so it'd be better to iterate over y and then x.

Don't use pairs here. Pairs is for unordered tables using non-array keys. That is not the usage case here. Use ipairs instead - that guarantees the map will be iterated over in order.

The changes:

Code: Select all

function love.draw()
   for y, row in ipairs(map) do
      for x, tile in ipairs(row) do
         love.graphics.draw(tileimages[tile], x*tilesize, y*tilesize)
      end
   end
end

Try that.

[AWizardDidIt]

No effect can be seen from that change. There are still no errors or whatever, but it still just shows the same window-of-emptiness from before. @_@; I don't know quite what it is, but I'm apparently missing something here.

[tentus]

Are you certain that you haven't set the color to black or something? It's pretty easy to overlook a small rendering mistake like that.

[AWizardDidIt]

All the code I was using is right there in what I put in my post, plus the changes I made based on the response below that. I now realise I must have needed more than that to get the map to display (which was all I'm attempting with this code and its images at the moment). What might I be missing if all I used was that code and some images? @_@;

[nevon]

Are the images all 16x16px?

[Lafolie]

I downloaded your code and adapted it to use my personal images. It works fine with the changes suggested here. I'll upload the .love file and a screenshot.



Edit: Yeah, you could be suffering from http://love2d.org/wiki/PO2_Syndrome

But then, in your code you specify the tile size to be 16 x 16. Hmm.

[AWizardDidIt]

Yours seems to show up as black nothingness as well. I'm on a dell inspiron desktop 570 running linux mint 64 bit (was running debian testing 64, but figured that might be affecting it so I installed mint to discover there is no change). There's definitely something wrong with my computer, huh?

I've attached my maptest this time, does it work for any of you?