ColorSequence

The ColorSequence data type represents a gradient of color values from 0 to 1. The color values are expressed using the ColorSequenceKeypoint type. This type is used in various properties of ParticleEmitter, Trail, Beam, and other objects that use color gradients.

Equality

Two ColorSequence objects are equivalent only if the values of their ColorSequenceKeypoint are equivalent, even if both would result in similar gradients.

Evaluation

The ColorSequence type does not have a built-in method for getting the value at a certain time/point. However, you can use the following function to evaluate at a specific time.

local function evalColorSequence(sequence: ColorSequence, time: number)
    -- If time is 0 or 1, return the first or last value respectively
    if time == 0 then
        return sequence.Keypoints[1].Value
    elseif time == 1 then
        return sequence.Keypoints[#sequence.Keypoints].Value
    end

    -- Otherwise, step through each sequential pair of keypoints
    for i = 1, #sequence.Keypoints - 1 do
        local thisKeypoint = sequence.Keypoints[i]
        local nextKeypoint = sequence.Keypoints[i + 1]
        if time >= thisKeypoint.Time and time < nextKeypoint.Time then
            -- Calculate how far alpha lies between the points
            local alpha = (time - thisKeypoint.Time) / (nextKeypoint.Time - thisKeypoint.Time)
            -- Evaluate the real value between the points using alpha
            return Color3.new(
                (nextKeypoint.Value.R - thisKeypoint.Value.R) * alpha + thisKeypoint.Value.R,
                (nextKeypoint.Value.G - thisKeypoint.Value.G) * alpha + thisKeypoint.Value.G,
                (nextKeypoint.Value.B - thisKeypoint.Value.B) * alpha + thisKeypoint.Value.B
            )
        end
    end
end

local colorSequence = ColorSequence.new{
    ColorSequenceKeypoint.new(0, Color3.fromRGB(255, 0, 0)),
    ColorSequenceKeypoint.new(0.5, Color3.fromRGB(0, 190, 200)),
    ColorSequenceKeypoint.new(1, Color3.fromRGB(190, 0, 255))
}

print(evalColorSequence(colorSequence, 0.75))  --> 0.372549, 0.372549, 0.892157