More random functions

[PixelTim]

I have a few ideas for random functions in GDScript (e.g. like randi(), randf(), etc...):

• randb()
  Returns a random bool: true or false. It is equivalent to expression: bool(randi()%2))
• rands() or randsign()
  random sign integer: 1 or -1. It is equivalent to expression: sign(randi()%2-0.5)
• to be continued...

[AThousandShips]

There's already a proposal and PR for randb:

• Add rand_bool(true_chance) function godot#86498
• Add randb() function to return a random boolean #8721

[Mickeon]

As an "maintenance" addendum, we were extremely close to implement rand_bool but it fell through due to lack of interest

[Calinou]

Returns a random bool: true or false. It is equivalent to expression: bool(randi()%2))

randf() > 0.5 should be more efficient (no modulo, which implies a division). bool(randi_range(0, 1)) might be even faster.

random sign integer: 1 or -1. It is equivalent to expression: sign(randi()%2-0.5)

randi_range(0, 1) * 2 - 1 should also be more efficient as it avoids the modulo.

[PixelTim]

Returns a random bool: true or false. It is equivalent to expression: bool(randi()%2))

randf() > 0.5 should be more efficient (no modulo, which implies a division). bool(randi_range(0, 1)) might be even faster.

random sign integer: 1 or -1. It is equivalent to expression: sign(randi()%2-0.5)

randi_range(0, 1) * 2 - 1 should also be more efficient as it avoids the modulo.

Thanks for sharing these expressions, earlier I thought that randi_range() uses randi()%_ under the hood.