Calculating the darker or lighter version of a color

ITzTravelInTime

Hi, in my text based game i need to calculate the darker and lighter version of a color stored into a variable, so how the colour representation works? and how can i do this calculation?

ITzTravelInTime

For the actual calculation i just need to get the RGB values for the color and increase them using the same constant value, but the problem is getting those values, settimg them is quite straight forward as i saw in the documentation

Eearslya

Colors are just stored as vector objects. So it's fairly easy to get the values simply by using r, g, b, and a.

myColor = white
red = myColor.r

The individual r/g/b/a colors are stored as values between 0 and 1, so to get the actual RGB value, you'd need to multiply by 255. For example, white.r is 1.000000. So, multiplied by 255 would be 255, the expected value for white.

ITzTravelInTime

thank you very mutch, it will help with parts in which you can sneak under things.

Jaywalker

I actually just wrote a function that turns a HSL (hue, saturation, lightness) to RGB

function HSL2RGB(h, s, l, a)
float v
float r = l
float g = l
float b = l
if l <= 0.5 then 
    v = l * (1.0 + s)
else
    v = l + s - (l * s)
endif
if v > 0 then
    float m
    float sv
    int sextant
    float frct
    float vsf
    float mid1
    float mid2
    
    m = l + l - v
    sv = (v - m) / v
    h = h * 6.0
    sextant = floor(h)
    frct = h - sextant
    vsf = v * sv * frct
    mid1 = m + vsf
    mid2 = v - vsf
    if sextant == 0 then
        r = v
        g = mid1
        b = m
    else if sextant == 1 then
        r = mid2
        g = v
        b = m
    else if sextant == 2 then
        r = m
        g = v
        b = mid1
    else if sextant == 3 then
        r = m
        g = mid2
        b = v
    else if sextant == 4 then
        r = mid1
        g = m
        b = v
    else if sextant == 5 then
        r = v
        g = m
        b = mid2
    else
        r = v
        g = m
        b = mid2
    endif endif endif endif endif endif
endif
print("R: " + r + " G: " + g + " B: " + b + " A: " + a + " V: " + v + "  " + " H: " + h + "\n" )
vector color = {r, g, b, a}
return color

so if you have something that is red it would look like HSL2RGB(0, 1, 0.5, 1)
The l parameter is used for how light/dark that color is
You can check those values here: http://hslpicker.com/#f00

Jaywalker

This post is deleted!

Jaywalker

@ITzTravelInTime does that work for you?

ITzTravelInTime

@Jaywalker I just used a simpler algorith i found online, i just needed the RGB components

Jaywalker

Okay good :)