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Color Modifier Example⚓︎

The ColorModifier class allows us to alter the color correction applied onto the game. This is used by items such as Astral Projection.

You can use Game:SetColorModifier() to apply a modifier, and Room:UpdateColorModifier() to set the color modifier back to what is defined in the room's FXParams, which are the values defined in fxlayers.xml by default.

Code⚓︎

You can download the full mod and its assets by clicking here.

Video Demonstration

A brief, red color correction whenever the player is damaged.

Example 
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local mod = RegisterMod("Repentogon Color Modifiers", 1)
local game = Game()

local RED_LENGTH = 3

-- Make our red color modifier.
local redModifier = ColorModifier(1, 0, 0, 0.33, 0, 2)

-- Add a red color modifier when the player is hurt.
function mod:OnPlayerHurt()
    -- Set the red effect. "lerp" stands for linear interpolation, and means it'll "fade" to our color modifier from the current one.
    game:SetColorModifier(redModifier, true, 0.3)

    -- Fade back to normal after RED_LENGTH frames.
    Isaac.CreateTimer(function ()
        -- Set's the color modifier back to what was specified in "fxparams.xml".
        game:GetRoom():UpdateColorModifier(true, true, 0.05)
    end, RED_LENGTH, 1, false)
end

mod:AddCallback(ModCallbacks.MC_ENTITY_TAKE_DMG, mod.OnPlayerHurt, EntityType.ENTITY_PLAYER)