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Reply From: |
exuin |
Connect the value_changed signal of the HSlider. Use the value to change the modulate.
Alright, the Signal arrives at the Sprite and it prints the value (from 1 to 100):
func _on_HSlider_value_changed(value):
print (value)
As I’d like colors of the full “rainbow” to be selectable, I guess 1 would match red and 100 violet, with yellow, green and (light and dark) blue in between.
Maybe I’m thinking in a completely wrong direction, but I’d assume something like this:
value 1: red
value 20: yellow (orange will “automatically mix” in between…)
value 40: green
value 60: light blue (in RGB that would be 0 - 255 - 255)
value 80: dark blue (RGB 0 - 0 - 255)
value100: violet
In my Sprite’s script:
func _on_HSlider_value_changed(value):
#print (value)
if (value) == 20:
modulate = Color(1, 1, 0)
Sliding to position 20 turns my Sprite yellow. So seeting up exact modulates for certain values works! But how could I have the areas in between interpolated “automatically”?
pferft | 2023-02-28 15:35
hue goes between 0 to 1 in Color, just swap your slider to use 0 to 1 and set modulate.h
I was able to get values between 0 and 1, but now I have a hard time figuring out how to set it up:
func _on_HSlider_value_changed(value):
if (value) >= 0.5:
modulate.h = ?
((Color) doesn’t match the variable’s type.)
pferft | 2023-02-28 16:26
modulate.h is a float, like value
Got it, so instead of fiddling around with something like modulate = Color(1, 1, 1) I should use modulate.h = (0.1).
Trying this:
func _on_HSlider_value_changed(value):
if (value) >= 0.5:
modulate.h = (0.9)
This works, the hue changes!
.
But only on an already colored sprite…
func _ready():
modulate = Color(1, 0, 0.5)
modulate.h = (0.4)
→ white Sprite appears greenish
func _ready():
modulate = Color(1, 1, 1)
modulate.h = (0.4)
→ white Sprite stays white
func _ready():
modulate = Color(0.5, 0.5, 0.5)
modulate.h = (0.4)
→ white Sprite stays grey
So can’t I use a white Sprite for this in the first place?
pferft | 2023-02-28 18:22
That’s just how it works, if you have rgb the same value it’s in grayscale.
I see, alright then, a white sprite has to be color-modulated before one can hue-modulate it. (I assume that a black sprite cannot be color- or hue-modulated at all.)
But will the choice of the initial color influence the hue’s appearance? I believe it shouldn’t matter, am I right?
pferft | 2023-02-28 19:28
It will. If you have a green image and a red hue, then it will appear gray since those are opposites on the color wheel.
I was afraid you’d say that…
So the only way to “cleanly” modify the color of a white sprite would be through rgb-values, I suppose.
We’re drifting away from my original post-topic quite a bit, but thank you for these basic-understanding elaborations, they’re quite useful.
I guess setting up interpolation between colors on set slider-values isn’t a trivial task. I just can’t find any really helpful tutorials or demos on that topic, so please let me know if you know some.
pferft | 2023-02-28 19:50
