local Vec3 = require "lib/vec3"

--- @class WheelScroll
--- @field pos Vec3 | nil
--- @field delta Vec3
local wheelscroll = {
    pos = nil,
    delta = Vec3 {}
}

function wheelscroll:update(dt)
    if love.mouse.isDown(3) then
        local mouseX, mouseY = love.mouse.getPosition()
        if (wheelscroll.pos) then wheelscroll.delta = wheelscroll.pos - Vec3 { mouseX, mouseY } end
        wheelscroll.pos = Vec3 { mouseX, mouseY }
        return
    end
    wheelscroll.pos = nil
    wheelscroll.delta = Vec3 {}
end

return wheelscroll