local downForce = 0

local physics = {
    collision = function(body1, body2)
        return(
            {
                hit =   body1.AbsolutePosition.X + body1.AbsoluteSize.X > body2.AbsolutePosition.X and
                        body2.AbsolutePosition.X + body2.AbsoluteSize.X > body1.AbsolutePosition.X and
                        body1.AbsolutePosition.Y + body1.AbsoluteSize.Y > body2.AbsolutePosition.Y and
                        body2.AbsolutePosition.Y + body2.AbsoluteSize.Y > body1.AbsolutePosition.Y,

                side = {
                    left =      body2.AbsolutePosition.X + body2.AbsoluteSize.X - body1.AbsolutePosition.X < 5,
                    right =     body1.AbsolutePosition.X + body1.AbsoluteSize.X - body2.AbsolutePosition.X < 5,
                    top =       body2.AbsolutePosition.Y + body2.AbsoluteSize.Y - body1.AbsolutePosition.Y < 5,
                    bottom =    body1.AbsolutePosition.Y + body1.AbsoluteSize.Y - body2.AbsolutePosition.Y < 5
                }
            }
        )
    end,
    updateGravity = function(mode, ...)
        local args = unpack({...})
        if mode == "increase" then
            downForce = downForce + args.inc
        elseif mode == "reset" then
            downForce = 0
        elseif mode == "jump" then
            downForce = -15
        end
        return downForce
    end,
}

return physics


--start of main
game.StarterGui:SetCoreGuiEnabled("All", false)

local player = game.Players.LocalPlayer
repeat wait() until player.Character player.Character:Destroy()
local mouse = player:GetMouse()
local screen = script.Parent
local physics = require(Workspace.Physics)
physics.gravity = 5

local anchor = false
local anchorPos;

local player = {
    body = screen:WaitForChild("Player"),
    canJump = true,
    speed = 5,
    upForce, downForce = 0, 0,
    lastSpot;
}

local isDown = {}

mouse.KeyDown:connect(function(key)
    isDown[key:lower()] = {
        true,
        key:lower() == "a" and UDim2.new(0, -player.speed, 0, 0) or
        key:lower() == "d" and UDim2.new(0, player.speed, 0, 0)
    }
    if key:byte() == 32 and player.canJump then
        anchor = false
        player.downForce = physics.updateGravity("jump")
    end
end)

mouse.KeyUp:connect(function(key)
    isDown[key:lower()][1] = false
end)

local physicsBodies = {
    {
        body = screen:WaitForChild("Ground"),
        func = function(hit, self)
            hit.Position = UDim2.new(
                hit.Position.X.Scale,
                hit.Position.X.Offset,
                0,
                self.AbsolutePosition.Y - self.AbsoluteSize.Y
            )
        end
    },
    {
        body = screen:WaitForChild("Float"),
        func = function() end
    }
}

game:GetService("RunService").RenderStepped:connect(function()
    for _, v in pairs(isDown) do
        if v[1] and v[2] then
            player.body.Position = player.body.Position + v[2]
        end
    end
    local gotHit;
    for _, object in pairs(physicsBodies) do
        local collision = physics.collision(object.body, player.body)
        if collision.hit then
            if not collision.side.left and not collision.side.right then
                gotHit = true
            end
            if collision.side.top then
                anchor = true
                anchorPos = {object.body.Position.Y.Scale, object.body.Position.Y.Offset}
            end
            if player.lastSpot then
                player.body.Position = player.lastSpot
            end
            object.func(player.body, object.body)
        end
    end
    if not gotHit then
        player.canJump = false
        player.lastSpot = player.body.Position
        player.downForce = physics.updateGravity("increase", {inc = 0.5})
    else
        player.canJump = true
        player.downForce = physics.updateGravity("reset")
    end
    if anchor then
        player.body.Position = UDim2.new(
            player.body.Position.X.Scale,
            player.body.Position.X.Offset,
            anchorPos[1],
            anchorPos[2] - player.body.Size.Y.Offset
        )
        physics.updateGravity("reset")
        player.canJump = true
    end
    player.body.Position = player.body.Position + UDim2.new(0, 0, 0, player.downForce)
    print(player.downForce)
end)