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Reply From: |
Magso |
If it’s only the edges store an array of Vector2s and pick a random index. The array would have to be updated constantly if the window is resizeable.
var screen_edges : Array = []
func _ready():
screen_edges.append(Vector2.ZERO)
screen_edges.append(Vector2(get_viewport().size.x,0))
screen_edges.append(Vector2(0,get_viewport().size.y))
screen_edges.append(get_viewport().size)
//Spawn at random point using screen_edges[rand_range(0,screen_edges.size())]
does that just pick a random edge? how would you pick a random point on that edge? I can have a go but don’t think it will be as neat as your thinking 
GodotBadger | 2020-02-07 23:21
Yeah, looks like that’ll spawn in one of the 4 screen corners…
jgodfrey | 2020-02-07 23:44
oh yeah, I see that now. I did it like this
func randomize_spawn_point():
var s = 0
var spawn_point
randomize()
s = int(round(rand_range(0.51, 4.49)))
if s == 1: # top edge
spawn_point = Vector2(rand_range(0, get_viewport_rect().size.x),0)
if s == 3: # bottom edge
spawn_point = Vector2(rand_range(0, get_viewport_rect().size.x), get_viewport_rect().size.y)
if s == 2: # right edge
spawn_point = Vector2(get_viewport_rect().size.x, rand_range(0, get_viewport_rect().size.y))
if s == 4: # left edge
spawn_point = Vector2(0, rand_range(0, get_viewport_rect().size.y))
return spawn_point
GodotBadger | 2020-02-07 23:45
It was the corners, for some reason I thought that’s what GodotBadger meant by edges.
Thanks for the help anyway, I still learned something
GodotBadger | 2020-02-08 00:29
I also learned something XD You might want to post your script as best answer as well.
You don’t have to call randomize() each time you generate a random number. It just sets the seed used for the random number generation, so it’s enough to call it once in _ready(). Also there is randi_range(), so instead of writing
s = int(round(rand_range(0.51, 4.49)))
you can simply use
s = randi_range(1, 4)
njamster | 2020-02-08 15:07
That doesn’t work for me, it gives an error, even though I can see it in the documentation. Says "The method “randi_range” isn’t declared in the current class???
GodotBadger | 2020-02-09 01:50
Sorry, my bad. As jgodfrey correctly pointed out, this method is only available on an instance of RandomNumberGenerator. Outside of this it won’t work. However, you could still use this:
var random_int = randi() % 4 + 1
The %-sign represents the modulo-operator.
Alternatively you could also use ẁrapi:
var random_int = wrapi(randi(), 1, 4)
njamster | 2020-02-09 11:44
