How do bitwise or bitmasking autotile from a grid?

Post reply

❤Follow Topic(5)

1 favourites

14 posts

From the Asset Store

Grid - snap to grid

$5 USD

Snap to visible grid - perfect solution for any game genre

paradine

- jobel
- - Joined 27 Jul, 2013
  - 232 topics • 2,179 posts
- 1
- 6 Mar, 2020
- Quote
hi,

I have grid of block sprites that I randomly set to 'filled', then after I want to go through and place the correct tilemap tiles on to each 'filled' block.

never tried this before but just wondering if this is the best approach..

see here: drive.google.com/file/d/1eOtWNitd67RKnDOlZH6rjs7FkmJRWN8k/view

thanks!
Tagged:

auto-tile
tilemap
- dop2000
- - Joined 26 May, 2016
  - 139 topics • 12,550 posts
- 1
- 6 Mar, 2020
- Quote
There is an easier way to do this:
- jobel
- - Joined 27 Jul, 2013
  - 232 topics • 2,179 posts
- 1
- 6 Mar, 2020
- Quote
dop2000 no no, I didn't mean that.. I meant set the correct tile, as in a NORTH, SOUTH, SE etc.. piece.
you have to look at the tileset to understand.

I want the first picture to become the second picture..

btw, this took a long time to make the image by hand cut & pasting the tiles manually and figuring out which one goes where. If there was ever a good process to automate it would be this one!!
- jobel
- - Joined 27 Jul, 2013
  - 232 topics • 2,179 posts
- 1
- 6 Mar, 2020
- Quote
I'm thinking I would start scanning each 'filled' block from left to right. Then only check the adjacent blocks to the right while disregarding diagonals. Or something like that.

I honestly don't know if this brute force way of checking every one by one (and then every one around it) is the best way to go.
- mekonbekon
- - Joined 9 May, 2014
  - 19 topics • 730 posts
- 1
- 6 Mar, 2020
- Quote
It sounds like you need a bitwise tilemap solution. Here's an example of a full blob 8-bit autotile I did a while back:

construct.net/en/forum/construct-3/general-discussion-7/full-blob-8-bit-auto-tile-126352
but if you do a fourm search for bitwise autotile you should find a bunch of other examples.
- jobel
- - Joined 27 Jul, 2013
  - 232 topics • 2,179 posts
- 1
- 6 Mar, 2020
- Quote
oh wow.. I didn't know it was called that (bitmasking - just updated the title of this thread), but it makes sense.. this seems to be on the path I need. thanks for this mekonbekon! now if I can just wrap my head around it!
- jobel
- - Joined 27 Jul, 2013
  - 232 topics • 2,179 posts
- 1
- 6 Mar, 2020
- Quote
btw mekonbekon this article gamedevelopment.tutsplus.com/tutorials/how-to-use-tile-bitmasking-to-auto-tile-your-level-layouts--cms-25673 is gold! thanks again!
- mekonbekon
- - Joined 9 May, 2014
  - 19 topics • 730 posts
- 1
- 6 Mar, 2020
- Quote
You're welcome :-)
- dop2000
- - Joined 26 May, 2016
  - 139 topics • 12,550 posts
- 1
- 7 Mar, 2020
- Quote
Sorry, I misunderstood your question. Here is another example I found on this forum some time ago:

dropbox.com/s/8zap7yuhwdb0pcb/Farming_TileSet.capx
- jobel
- - Joined 27 Jul, 2013
  - 232 topics • 2,179 posts
- 1
- 7 Mar, 2020
- Quote
dop2000 thanks that's basically what mekonbekon showed me in that linked thread so I'm all set thanks! I knew there was a better way! thanks forum!
- jobel
- - Joined 27 Jul, 2013
  - 232 topics • 2,179 posts
- 1
- 7 Mar, 2020
- Quote
actually dop2000 yours has no delay when refreshing the tilemap - is maybe because data comes from an Array opposed to AJAX>DDict? there is a very noticeable 1-2 second delay when refreshing the tilemap - not to mention the entire game freezes while its delayed.

see code here: construct.net/out
- jobel
- - Joined 27 Jul, 2013
  - 232 topics • 2,179 posts
- 1
- 7 Mar, 2020
- Quote
dop2000 nevermind, I think I found a bug in the loop. It was looping for the Width and Height of the entire tilemap in pixels, not cells..
thanks, your capx helped me figure that out!
Try Construct 3

Develop games in your browser. Powerful, performant & highly capable.
Try Now Construct 3 users don't see these ads
- dop2000
- - Joined 26 May, 2016
  - 139 topics • 12,550 posts
- 1
- 7 Mar, 2020
- Quote
No problem! But it's not my capx, I found it in some old post here :)

Here is another useful link:

dropbox.com/s/r1em8npglbdsoeg/Tilemap_Bitwise.png
- jobel
- - Joined 27 Jul, 2013
  - 232 topics • 2,179 posts
- 1
- 7 Mar, 2020
- Quote
dop2000 I like that.. and I have it working great! and thanks again!