MTA SA FPS view

local rotX, rotY = 0, 0
local camVehRot = 0
local rot = 0

local curVehRot = 0
local oldVehRot = 0

local egoEnabled = false

local mouseSensitivity = 0.1

lp = getLocalPlayer()
local delay = 0

local PI = math.pi

local function freecamFrame ( slice )


    local camPosX, camPosY, camPosZ = getPedBonePosition ( lp, 8 )

    local angleZ = math.sin(rotY)
    local angleY = math.cos(rotY) * math.cos(rotX)
    local angleX = math.cos(rotY) * math.sin(rotX)

    local camTargetX = camPosX + ( angleX ) * 100
    local camTargetY = camPosY + angleY * 100
    local camTargetZ = camPosZ + angleZ * 100

    local veh = getPedOccupiedVehicle ( lp )
    if veh then
        local rx, ry, curVehRot = getElementRotation ( veh )
        local changedRotation = oldVehRot - curVehRot

        oldVehRot = curVehRot

        if not totalRot then
            totalRot = curVehRot
        end

        totalRot = changedRotation * 2 + totalRot

        local rotX = ( ( rotX * 360 / PI ) + totalRot ) / 360 * PI
        if rotX > PI then
            rotX = rotX - 2 * PI
        elseif rotX < -PI then
            rotX = rotX + 2 * PI
        end

        camTargetX = camPosX + ( math.cos(rotY) * math.sin(rotX) ) * 100
        camTargetY = camPosY + ( math.cos(rotY) * math.cos(rotX) ) * 100
    end

    setCameraMatrix ( camPosX, camPosY, camPosZ, camTargetX, camTargetY, camTargetZ )
end

local function freecamMouse (cX,cY,aX,aY)

    if isCursorShowing() or isMTAWindowActive() then
        delay = 5
        return
    elseif delay > 0 then
        delay = delay - 1
        return
    end

    local width, height = guiGetScreenSize()
    aX = aX - width / 2
    aY = aY - height / 2

    rotX = rotX + aX * mouseSensitivity * 0.01745
    rotY = rotY - aY * mouseSensitivity * 0.01745

    if rotX > PI then
        rotX = rotX - 2 * PI
    elseif rotX < -PI then
        rotX = rotX + 2 * PI
    end

    if rotY > PI then
        rotY = rotY - 2 * PI
    elseif rotY < -PI then
        rotY = rotY + 2 * PI
    end

    if rotY < -PI / 2.05 then
       rotY = -PI / 2.05
    elseif rotY > PI / 2.05 then
        rotY = PI / 2.05
    end
end

function setEgoEnabled (x, y, z)

    if (x and y and z) then
        setCameraMatrix ( camPosX, camPosY, camPosZ )
    end
    addEventHandler("onClientPreRender", getRootElement(), freecamFrame)
    addEventHandler("onClientRender", getRootElement(), freecamFrame)
    addEventHandler("onClientCursorMove",getRootElement(), freecamMouse)
end

function setEgoDisabled()

    if egoEnabled then
        egoEnabled = false
        removeEventHandler("onClientPreRender", getRootElement(), freecamFrame)
        removeEventHandler("onClientRender", getRootElement(), freecamFrame)
        removeEventHandler("onClientCursorMove",getRootElement(), freecamMouse)
        setCameraTarget ( lp )
    end
end
addEventHandler ( "onClientPlayerWasted", getLocalPlayer(), setEgoDisabled )

function ego_func ()

    if egoEnabled then
        setEgoDisabled()
    else
        egoEnabled = true
        local x, y, z = getElementPosition ( lp )
        setEgoEnabled ( x, y, z )
    end
end
addCommandHandler ( "fps", ego_func )