My question is probably more a math question than a programming question. The Area2D.collision_layer property returns a int value. So, if I have layer 3 (value 4), 4 (value 8) and 5 (value 16) enabled in my Area2D, collision_layer returns 28.
My question is: how do I return values 4, 8 and 16 from 28 (collision_layer)?
Nevermind, I've realized that I could simply use Area2D.get_collision_layer_bit(int bit) to check if an area can collide with others on the specified collision layer.
I did however find how to get the individual layer bits from an integer number (even though I didn't need it after all):
# layers is the collision_layer int
func get_collision_layer_bits(layers):
var layer_array = []
for i in range(20):
var mask = 1 << i
var masked_n = layers & mask
var bit_value = masked_n >> i
layer_array.append(bool(bit_value))
return layer_array
pass
Basically copied from this answer: https://stackoverflow.com/questions/2249731/how-do-i-get-bit-by-bit-data-from-an-integer-value-in-c
