local Vec3 = require "lib/vec3"
local MIDDLE_BUTTON = 3

--- @class (exact) WheelScroll
--- @field x number
--- @field y number
--- @field delta Vec3
local wheelscroll = {
    x = 0.0,
    y = 0.0,
    delta = Vec3 {}
}

function love.mousepressed(x, y, button)
    if button == MIDDLE_BUTTON then
        wheelscroll.delta = Vec3 { wheelscroll.x, wheelscroll.y } - Vec3 { x, y }
        wheelscroll.x = x
        wheelscroll.y = y
    end
end

return wheelscroll