Reason for 1,1 at top left?

[rduke1982]

Considering Defold uses 1,1 as the bottom left, what was the reason for making it the top left in the extension? Or is my understanding wrong?

[selimanac]

Map is essentially a single-dimensional array, and every array starts at 0 (or 1 in Lua). It’s up to you how to set up the map—you may choose to use the built-in tilemap editor or not. If needed, you can use astar.map_vflip() (or you can vflip on setup)for vertical flipping.

[rduke1982]

I think I understand, but I want to make sure. This isn't a major issue, I'm just curious.

In Defold 1,1 is the red circle. But in Astar, the array is 1,-1 in Defold — the blue circle.

Is my understanding correct?

vflip wouldn't work because it would still have the same -y coords.

[rduke1982]

I guess vflip would work. It's confusing because of how the print looks, but it makes sense otherwise.

Without flipping, clicking tile 3,10 would be 3,4. But after flipping, it matches the correct tile in the astar array.

[selimanac]

I'm quite tired today, so I guess I might be misleading you. Sorry about that! Here is a very basic example using built-in tilemaps:
astar_test.zip
You can also check out older examples here:
https://github.com/selimanac/defold-astar-examples/tree/master

[rduke1982]

I got it working how I want, for now. Thanks for the help! I shared a short video of my result in Discord.