Expression 2 - Fading color based on Z (using percentage method; mapped 0% to low, 100% to high and then converted to color - so bottom is colored darker/black and top is being colored brighter/white)

__mapped_coloring.txt

# New version/preview: https://i.imgur.com/xsq3MJ7.png
# Old version/preview: https://i.imgur.com/2F23MlA.png

if (first())
{
    function number percentOfValueInRange(Min, Max, Value)
    {
        return ((Min - Value) / (Min - Max)) * 100
    }

    function number colorValueFromPercent(Low, High, Value)
    {
        return round((255 * percentOfValueInRange(Low, High, Value)) / 100)
    }

    # On gm_flatgrass map
    local HIGH = -12000 # Top
    local LOW  = -12700 # Bottom

    #print(colorValueFromPercent(LOW, HIGH, -12000)) # 255
    #print(colorValueFromPercent(LOW, HIGH, -12185)) # 188
    #print(colorValueFromPercent(LOW, HIGH, -12350)) # 128
    #print(colorValueFromPercent(LOW, HIGH, -12610)) # 33
    #print(colorValueFromPercent(LOW, HIGH, -12700)) # 0

    local X = entity():pos():x()
    local Y = entity():pos():y()
    local Z = LOW

    for (I = 1, 58)
    {
        #local Z = random(LOW, HIGH)
        holoCreate(I, vec(X, Y, Z), vec(5.0, 5.0, 1.0), ang(), vec(colorValueFromPercent(LOW, HIGH, Z), 0, 0), "models/hunter/blocks/cube025x025x025.mdl")
        holoMaterial(I, "models/debug/debugwhite")
        holoDisableShading(I, 1)
        holoShadow(I, 0)
        Z = Z + 12.0
    }

    #selfDestruct()
}