--------------------------------------------------
------ DEATH CAM FOR FIVEM MADE BY KIMINAZE ------
------ This script does let you control the ------
------ camera after you have died.          ------
--------------------------------------------------

--------------------------------------------------
------------------- VARIABLES --------------------
--------------------------------------------------

-- main variables
local cam = nil

local isDead = false

local angleY = 0.0
local angleZ = 0.0


--------------------------------------------------
---------------------- LOOP ----------------------
--------------------------------------------------
Citizen.CreateThread(function()
    while true do
        Citizen.Wait(1)
        
        -- process cam controls if cam exists and player is dead
        if (cam and isDead) then
            ProcessCamControls()
        end
    end
end)

Citizen.CreateThread(function()
    while true do
        Citizen.Wait(500)
        
        if (not isDead and NetworkIsPlayerActive(PlayerId()) and IsPedFatallyInjured(PlayerPedId())) then
            isDead = true
            
            StartDeathCam()
        elseif (isDead and NetworkIsPlayerActive(PlayerId()) and not IsPedFatallyInjured(PlayerPedId())) then
            isDead = false
            
            EndDeathCam()
        end
    end
end)



--------------------------------------------------
------------------- FUNCTIONS --------------------
--------------------------------------------------

-- initialize camera
function StartDeathCam()
    ClearFocus()

    local playerPed = PlayerPedId()
    
    cam = CreateCamWithParams("DEFAULT_SCRIPTED_CAMERA", GetEntityCoords(playerPed), 0, 0, 0, GetGameplayCamFov())

    SetCamActive(cam, true)
    RenderScriptCams(true, true, 1000, true, false)
end

-- destroy camera
function EndDeathCam()
    ClearFocus()

    RenderScriptCams(false, false, 0, true, false)
    DestroyCam(cam, false)
    
    cam = nil
end

-- process camera controls
function ProcessCamControls()
    local playerPed = PlayerPedId()
    local playerCoords = GetEntityCoords(playerPed)

    -- disable 1st person as the 1st person camera can cause some glitches
    DisableFirstPersonCamThisFrame()
    
    -- calculate new position
    local newPos = ProcessNewPosition()

    -- focus cam area
    SetFocusArea(newPos.x, newPos.y, newPos.z, 0.0, 0.0, 0.0)
    
    -- set coords of cam
    SetCamCoord(cam, newPos.x, newPos.y, newPos.z)
    
    -- set rotation
    PointCamAtCoord(cam, playerCoords.x, playerCoords.y, playerCoords.z + 0.5)
end

function ProcessNewPosition()
    local mouseX = 0.0
    local mouseY = 0.0
    
    -- keyboard
    if (IsInputDisabled(0)) then
        -- rotation
        mouseX = GetDisabledControlNormal(1, 1) * 8.0
        mouseY = GetDisabledControlNormal(1, 2) * 8.0
        
    -- controller
    else
        -- rotation
        mouseX = GetDisabledControlNormal(1, 1) * 1.5
        mouseY = GetDisabledControlNormal(1, 2) * 1.5
    end

    angleZ = angleZ - mouseX -- around Z axis (left / right)
    angleY = angleY + mouseY -- up / down
    -- limit up / down angle to 90°
    if (angleY > 89.0) then angleY = 89.0 elseif (angleY < -89.0) then angleY = -89.0 end
    
    local pCoords = GetEntityCoords(PlayerPedId())
    
    local behindCam = {
        x = pCoords.x + ((Cos(angleZ) * Cos(angleY)) + (Cos(angleY) * Cos(angleZ))) / 2 * (Cfg.radius + 0.5),
        y = pCoords.y + ((Sin(angleZ) * Cos(angleY)) + (Cos(angleY) * Sin(angleZ))) / 2 * (Cfg.radius + 0.5),
        z = pCoords.z + ((Sin(angleY))) * (Cfg.radius + 0.5)
    }
    local rayHandle = StartShapeTestRay(pCoords.x, pCoords.y, pCoords.z + 0.5, behindCam.x, behindCam.y, behindCam.z, -1, PlayerPedId(), 0)
    local a, hitBool, hitCoords, surfaceNormal, entityHit = GetShapeTestResult(rayHandle)
    
    local maxRadius = Cfg.radius
    if (hitBool and Vdist(pCoords.x, pCoords.y, pCoords.z + 0.5, hitCoords) < Cfg.radius + 0.5) then
        maxRadius = Vdist(pCoords.x, pCoords.y, pCoords.z + 0.5, hitCoords)
    end
    
    local offset = {
        x = ((Cos(angleZ) * Cos(angleY)) + (Cos(angleY) * Cos(angleZ))) / 2 * maxRadius,
        y = ((Sin(angleZ) * Cos(angleY)) + (Cos(angleY) * Sin(angleZ))) / 2 * maxRadius,
        z = ((Sin(angleY))) * maxRadius
    }
    
    local pos = {
        x = pCoords.x + offset.x,
        y = pCoords.y + offset.y,
        z = pCoords.z + offset.z
    }
    
    
    -- Debug x,y,z axis
    --DrawMarker(1, pCoords.x, pCoords.y, pCoords.z, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.03, 0.03, 5.0, 0, 0, 255, 255, false, false, 2, false, 0, false)
    --DrawMarker(1, pCoords.x, pCoords.y, pCoords.z, 0.0, 0.0, 0.0, 0.0, 90.0, 0.0, 0.03, 0.03, 5.0, 255, 0, 0, 255, false, false, 2, false, 0, false)
    --DrawMarker(1, pCoords.x, pCoords.y, pCoords.z, 0.0, 0.0, 0.0, -90.0, 0.0, 0.0, 0.03, 0.03, 5.0, 0, 255, 0, 255, false, false, 2, false, 0, false)
    
    return pos
end

--XAchse Westen Osten
--Yachse Norden Süden
--ZAchse oben unten

--gegenkathete = x
--ankathete = y
--hypotenuse = 1
--alpha = GetCamRot(cam).z