I’m making a game where there are many Area2Ds of different countries, but I want to know the size of each country to calculate their surrender limit (bigger countries take longer to surrender, for example).
I don’t want to find the area of just one collision2D as some countries have multiple (see island nations, overseas colonies…), but looping that with the children could work if finding area using AREA2ds isn’t a thing.
I don’t want to simply use the outermost points of a collisionshape2D and draw a big rectangle, as it would make some countries way bigger than they really are (see especially the British and French empires)
Is it possible to find the area of an Area2D? If not, is it possible to calculate the area of CollisionShape2Ds (then I could just loop through the children).
p.s. Country size will not be the only factor for surrender limit, things like equipment stockpiles and something similar to war support in HOI4 might also affect it…
This doesn’t super solve your immediate problem, but it might help you keep progress on your game:
Remember — it’s a game. Maybe yes, you could calculate the area of the polygon you drew, and then you’d have it working like that for good. But then what happens if you want to fudge a number, like the area calculates that 2 troops can fit in France but for balance you really want 3? At that point you’re going to need to fudge the calculation, add another factor or redraw your polygon (the latter which might not be possible).
An alternative way to solve this is you can look up on wikipedia the different areas of these countries. You can assign a factor for each one (like Risk does) based on various factors - area, population, etc, but ultimately balance, that allows you to set whatever you want on each country. Not that the math isn’t exciting, but you’re probably going to end up doing this anyway after you figure the math out.