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Asked By | pferft |
Hi everyone,
this is my hundredth question! : D
I have a completely white Sprite Color-modulated to orange:
func _ready():
modulate = Color(1, 0.5, 0)
I could put a black copy of the Sprite on top of it and then, for example, have it set 10, 20, 30… % transparent for different levels of darkening (or the other way around a white one for brightening (or “pale-ing”, it you like) - up until 0 % transparency for a complete black or white coverage respectively).
But is there any way to directly darken („blacken“) or lighten („whiten“) that colored Sprite like that in code (without needing the black and white copies on top)?
Could you modulate it to a darker orange?
SteveSmith | 2023-03-01 16:31
Decreasing the RGB’s R and G values would darken the orange, but in my case I’d need a different tweakable value to achieve the effect. Like values from a slider from 0 (black/dark) to 100 (white/bright) to be attached on top of the given RGB values in order to darken them or brighten them up.
I could imagine this might be doable with a shader, but I wouldn’t know how and I’d like to know if there are other ways as well…
pferft | 2023-03-01 16:42
Replying to my own post for sharing my solution.
Two HSliders: one for defining a color (HSliderColor) and the other one (HSliderBrightness) to brighten/darken that color. In this scenario the HSliderColor affects itself (my pure white Grabber-Sprite shows the results).
What I wanted is the HSliderBrightness to start left “completely dark” (black), gradually losing darkness moving right until reaching the middle position where the selected color stays untouched. Further to the right then “lightness” should increase until reaching “complete brightness” (white).
extends HSliderColor
var selected_color = 1
var selected_brightness = 1
var selected_darkness = 1
# (initial values to avoid crashing...)
func _on_HSliderColor_value_changed(value): # (it's colorizing itself...)
selected_color = value # to take color down into darkness/brightness function
var color = Color.from_hsv(value, selected_brightness, selected_darkness, 1)
modulate = Color(color)
func _on_HSliderBrightness_value_changed(value):
if value <= 0.5: # calculate useful darkness-value:
var calc_darkness_value = value * 2
var darkness = Color.from_hsv(selected_color, 1, calc_darkness_value, 1)
modulate = Color(darkness)
selected_darkness = calc_darkness_value # to take darkness up into color-function
selected_brightness = 1 # just so things look right
if value > 0.5: # calculate useful brightness-value:
var calc_brightness_value = 1 - ((value - 0.5) * 2)
var brightness = Color.from_hsv(selected_color, calc_brightness_value, 1, 1)
modulate = Color(brightness)
selected_brightness = calc_brightness_value # to take brightness up into color-function
selected_darkness = 1 # just so things look right
The idea is to double the values below 0.5 in order to cover the whole dark-range from 0.0 to 1.0 by reaching the middle position, as well as doing the same for the bright range starting from 0.5 (and “turn them around” for increasing in the right direction…).
Thanks again to Wakatta for offering the crucial hint!
pferft | 2023-03-02 17:54