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Godot - GDscript provides us with a callv method:

Calls the method represented by this Callable. Unlike call(), this method expects all arguments to be contained inside the arguments Array.

---

I'm trying to use implement some CONST's for my randf_range call:

So instead off

rng.randf_range(0.1, 0.3)

I'm using:

const RANGE = [ .1, .3 ]    
rng.randf_range.callv(RANGE)

However, this always results the TO value as you can see in this mre:

const RANGE = [ .1, .3 ]    
    
var rng = RandomNumberGenerator.new()
rng.seed = hash("HuH")

for i in range(3):
    print('%d -> %f' % [ i, rng.randf_range.callv(RANGE) ])
    
rng = RandomNumberGenerator.new()
rng.seed = hash("HuH")

for i in range(3):
    print('%d -> %f' % [ i, rng.randf_range(RANGE[0], RANGE[1]) ])

Outputs:

0 -> 0.300000
1 -> 0.300000
2 -> 0.300000
0 -> 0.214059
1 -> 0.191159
2 -> 0.203312

Why is that?

---

GDScript Playground

Godot - GDscript provides us with a callv method:

Calls the method represented by this Callable. Unlike call(), this method expects all arguments to be contained inside the arguments Array.

---

I'm trying to use implement some CONST's for my randf_range call:

So instead off

rng.randf_range(0.1, 0.3)

I'm using:

const RANGE = [ .1, .3 ]    
rng.randf_range.callv(RANGE)

However, this always results the TO value as you can see in this mre:

const RANGE = [ .1, .3 ]    
    
var rng = RandomNumberGenerator.new()
rng.seed = hash("HuH")

for i in range(3):
    print('%d -> %f' % [ i, rng.randf_range.callv(RANGE) ])
    
rng = RandomNumberGenerator.new()
rng.seed = hash("HuH")

for i in range(3):
    print('%d -> %f' % [ i, rng.randf_range(RANGE[0], RANGE[1]) ])

Outputs:

0 -> 0.300000
1 -> 0.300000
2 -> 0.300000
0 -> 0.214059
1 -> 0.191159
2 -> 0.203312

Why is that?

---

GDScript Playground

• godot
• gdscript
• godot4

Share Improve this question Follow edited Mar 18 at 17:11 0stone0 asked Mar 18 at 17:04 0stone00stone0 44.5k55 gold badges5252 silver badges8080 bronze badges

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1 Answer 1

Sorted by: Reset to default 1

This is open Issue 93600:

Callable.callv() will make call with wrong arguments if a const Array is passed

The workaround is to make the array mutable or duplicate() it when you use it. callv will not make changes to it either way:

  var RANGE = [ .1, .3 ]
# ^^^

or

  const RANGE = [ .1, .3 ]

  # ...

  print('%d -> %f' % [ i, rng.randf_range.callv(RANGE.duplicate()) ])
  #                                                  ^^^^^^^^^^^^

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