I'm new to the engine (but not programming in general) and am using it to prototype a fighting game. I'm running into an issue with detecting when an attack's hitbox connects with the enemy's hurtbox. Both hitbox and hurtbox are an Area2D with a child CollisionShape2D using shape RectangleShape2D. The issue is that there appears to be a delay before the hitbox emits the area_entered signal: if the hitbox is active for only 1 frame (at 60 FPS), the signal is never emitted, and at 2 frames it is only rarely emitted.
I have an AnimationPlayer which toggles the attack's hitbox on and off by flipping the disabled property of the hitbox's CollisionShape2D. If the attack is active for 1 frame, the area_entered signal is never issued. The AnimationPlayer setup for 1 active frame looks like this (hitbox active on frame 6 and disabled on frame 7):
If the attack is active for 2 frames, the area_entered signal is issued, but inconsistently. There are significantly more misses than hits. The AnimationPlayer setup looks like this (hitbox active on frame 6 and disabled on frame 8):
If the attack is active for 3 frames, it emits the area_entered consistently as expected. The AnimationPlayer setup looks like this (hitbox active on frame 6 and disabled on frame 9):
I've got Visible Collision Shapes enabled in the debug menu and I can see that the areas are indeed active and overlapping even at 1 active frame, so I'm not sure why it isn't emitting the signal. My only guess is that Godot's physics processing somehow requires areas to overlap for a period of time before emitting the signal? But I have no idea if that's actually true, and figured I would ask here before resorting to trolling through the engine code myself. Engine version is 3.4.2. Any guidance on what I can do to get signals emitted consistently at 1 active frame (or an alternative method of detecting area overlaps) would be appreciated.
