Superman-Only for Admins

razvan2299 · January 28, 2014

Hi!As the title says I want that only admins to be able to use the Superman resource.Cheers

xeon17 · January 28, 2014

Post the superman resource then we can help you.

Alexs · January 28, 2014

https://community.multitheftauto.com/index.php?p= ... ls&id=5477

razvan2299 · January 28, 2014

https://community.multitheftauto.com/index.php?p=resources&s=details&id=5477

When I put the resource in the resource server and change mtaserver.conf the resource won't work(no errors in the console)

xeon17 · January 28, 2014

Replace your client.lua with

-- Copyright (c) 2008, Alberto Alonso 
-- 
-- All rights reserved. 
-- 
-- Redistribution and use in source and binary forms, with or without modification, 
-- are permitted provided that the following conditions are met: 
-- 
--     * Redistributions of source code must retain the above copyright notice, this 
--       list of conditions and the following disclaimer. 
--     * Redistributions in binary form must reproduce the above copyright notice, this 
--       list of conditions and the following disclaimer in the documentation and/or other 
--       materials provided with the distribution. 
--     * Neither the name of the superman script nor the names of its contributors may be used 
--       to endorse or promote products derived from this software without specific prior 
--       written permission. 
-- 
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
-- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
local Superman = {} 
  
function canceldamage() 
    cancelEvent() 
end 
addEventHandler("onClientPedDamage", getRootElement(), canceldamage) 
  
-- Settings 
local ZERO_TOLERANCE = 0.00001 
local MAX_ANGLE_SPEED = 6 -- In degrees per frame 
local MAX_SPEED = 1.0 
local EXTRA_SPEED_FACTOR = 1.85 
local LOW_SPEED_FACTOR = 0.40 
local ACCELERATION = 0.025 
local EXTRA_ACCELERATION_FACTOR = 1.8 
local LOW_ACCELERATION_FACTOR = 0.85 
local TAKEOFF_VELOCITY = 1.75 
local TAKEOFF_FLIGHT_DELAY = 750 
local SMOKING_SPEED = 1.25 
local GROUND_ZERO_TOLERANCE = 0.18 
local LANDING_DISTANCE = 3.2 
local FLIGHT_ANIMLIB = "swim" 
local FLIGHT_ANIMATION = "Swim_Dive_Under" 
local FLIGHT_ANIM_LOOP = false 
local IDLE_ANIMLIB = "cop_ambient" 
local IDLE_ANIMATION = "Coplook_loop" 
local IDLE_ANIM_LOOP = true 
local MAX_Y_ROTATION = 55 
local ROTATION_Y_SPEED = 3.8 
  
-- Static global variables 
local thisResource = getThisResource() 
local rootElement = getRootElement() 
local localPlayer = getLocalPlayer() 
local serverGravity = getGravity() 
  
-- 
-- Check for admin privileges 
-- 
local function canFly() 
return (isObjectInACLGroup("user."..getAccountName(getPlayerAccount(source)),aclGetGroup("Admin"))) 
end 
  
-- 
-- Utility functions 
-- 
local function isPlayerFlying(player) 
  local data = getElementData(player, "superman:flying") 
  if not data or data == false then return false 
  else return true end 
end 
  
local function setPlayerFlying(player, state) 
  if state == true then state = true 
  else state = false end 
  
  setElementData(player, "superman:flying", state) 
end 
  
local function iterateFlyingPlayers() 
  local current = 1 
  local allPlayers = getElementsByType("player") 
  
  return function() 
    local player 
     
    repeat 
      player = allPlayers[current] 
      current = current + 1 
    until not player or (isPlayerFlying(player) and isElementStreamedIn(player)) 
  
    return player 
  end 
end 
  
function Superman:restorePlayer(player) 
  setPlayerFlying(player, false) 
  setPedAnimation(player, false) 
  setElementVelocity(player, 0, 0, 0) 
  setElementRotation(player, 0, 0, 0) 
  --setPedRotation(player, getPedRotation(player)) 
  setElementCollisionsEnabled(player, true) 
  self:destroySmokeGenerators(player) 
  self.rotations[player] = nil 
  self.previousVelocity[player] = nil 
end 
  
function Superman:createSmokeGenerator(player) 
  local generator = createObject(2780, getElementPosition(player)) 
  setElementCollisionsEnabled(generator, false) 
  setObjectScale(generator, 0) 
  return generator 
end 
  
function Superman:createSmokeGenerators(player) 
  if not self.smokeGenerators[player] then 
    local smokeGenerators = {} 
  
    smokeGenerators[1] = self:createSmokeGenerator(player) 
    attachElements(smokeGenerators[1], player, 0.75, -0.2, -0.4, -40, 0, 60) 
    smokeGenerators[2] = self:createSmokeGenerator(player) 
    attachElements(smokeGenerators[2], player, -0.75, -0.2, -0.4, -40, 0, -60) 
  
    self.smokeGenerators[player] = smokeGenerators 
  end 
end 
  
function Superman:destroySmokeGenerators(player) 
  if self.smokeGenerators[player] then 
    for k, v in ipairs(self.smokeGenerators[player]) do 
      destroyElement(v) 
    end 
    self.smokeGenerators[player] = nil 
  end 
end 
  
function angleDiff(angle1, angle2) 
  angle1, angle2 = angle1 % 360, angle2 % 360 
  local diff = (angle1 - angle2) % 360 
  if diff <= 180 then 
    return diff 
  else 
    return -(360 - diff) 
  end 
end 
  
local function isElementInWater(ped) 
  local pedPosition = Vector3D:new(getElementPosition(ped)) 
  if pedPosition.z <= 0 then return true end 
  
  local waterLevel = getWaterLevel(pedPosition.x, pedPosition.y, pedPosition.z) 
  if not isElementStreamedIn(ped) or not waterLevel or waterLevel < pedPosition.z then 
    return false 
  else 
    return true 
  end 
end 
  
local function isnan(x) 
    math.inf = 1/0 
    if x == math.inf or x == -math.inf or x ~= x then 
        return true 
    end 
    return false 
end 
  
local function getVector2DAngle(vec) 
  if vec.x == 0 and vec.y == 0 then return 0 end 
  local angle = math.deg(math.atan(vec.x / vec.y)) + 90 
  if vec.y < 0 then 
    angle = angle + 180 
  end 
  return angle 
end 
  
-- 
-- Initialization and shutdown functions 
-- 
function Superman.Start() 
  local self = Superman 
  
  -- Register events 
  addEventHandler("onClientResourceStop", getResourceRootElement(thisResource), Superman.Stop, false) 
  addEventHandler("onPlayerJoin", rootElement, Superman.onJoin) 
  addEventHandler("onPlayerQuit", rootElement, Superman.onQuit) 
  addEventHandler("onClientRender", rootElement, Superman.processControls) 
  addEventHandler("onClientRender", rootElement, Superman.processFlight) 
  addEventHandler("onClientPlayerDamage", localPlayer, Superman.onDamage, false) 
  addEventHandler("onClientElementDataChange", rootElement, Superman.onDataChange) 
  addEventHandler("onClientElementStreamIn", rootElement, Superman.onStreamIn) 
  addEventHandler("onClientElementStreamOut", rootElement, Superman.onStreamOut) 
  
  -- Bind keys 
  bindKey("jump", "down", Superman.onJump) 
  
  -- Register commands 
  addCommandHandler("superman", Superman.cmdSuperman) 
  
  -- Initializate attributes 
  self.smokeGenerators = {} 
  self.rotations = {} 
  self.previousVelocity = {} 
end 
addEventHandler("onClientResourceStart", getResourceRootElement(thisResource), Superman.Start, false) 
  
function Superman.Stop() 
  local self = Superman 
  
  setGravity(serverGravity) 
  
  -- Restore all players animations, collisions, etc 
  for player in iterateFlyingPlayers() do 
    self:restorePlayer(player) 
  end 
end 
  
  
  
-- 
-- Join/Quit 
-- 
function Superman.onJoin(player) 
  local self = Superman 
  local player = player or source 
  
  setPlayerFlying(player, false) 
end 
  
function Superman.onQuit(reason, player) 
  local self = Superman 
  local player = player or source 
  
  if isPlayerFlying(player) then 
    self:restorePlayer(player) 
  end 
end 
  
  
-- 
-- onDamage: superman is invulnerable 
-- 
function Superman.onDamage() 
  local self = Superman

Alexs · January 28, 2014

Replace your client.lua with

-- Copyright (c) 2008, Alberto Alonso 
-- 
-- All rights reserved. 
-- 
-- Redistribution and use in source and binary forms, with or without modification, 
-- are permitted provided that the following conditions are met: 
-- 
--     * Redistributions of source code must retain the above copyright notice, this 
--       list of conditions and the following disclaimer. 
--     * Redistributions in binary form must reproduce the above copyright notice, this 
--       list of conditions and the following disclaimer in the documentation and/or other 
--       materials provided with the distribution. 
--     * Neither the name of the superman script nor the names of its contributors may be used 
--       to endorse or promote products derived from this software without specific prior 
--       written permission. 
-- 
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
-- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
local Superman = {} 
  
function canceldamage() 
    cancelEvent() 
end 
addEventHandler("onClientPedDamage", getRootElement(), canceldamage) 
  
-- Settings 
local ZERO_TOLERANCE = 0.00001 
local MAX_ANGLE_SPEED = 6 -- In degrees per frame 
local MAX_SPEED = 1.0 
local EXTRA_SPEED_FACTOR = 1.85 
local LOW_SPEED_FACTOR = 0.40 
local ACCELERATION = 0.025 
local EXTRA_ACCELERATION_FACTOR = 1.8 
local LOW_ACCELERATION_FACTOR = 0.85 
local TAKEOFF_VELOCITY = 1.75 
local TAKEOFF_FLIGHT_DELAY = 750 
local SMOKING_SPEED = 1.25 
local GROUND_ZERO_TOLERANCE = 0.18 
local LANDING_DISTANCE = 3.2 
local FLIGHT_ANIMLIB = "swim" 
local FLIGHT_ANIMATION = "Swim_Dive_Under" 
local FLIGHT_ANIM_LOOP = false 
local IDLE_ANIMLIB = "cop_ambient" 
local IDLE_ANIMATION = "Coplook_loop" 
local IDLE_ANIM_LOOP = true 
local MAX_Y_ROTATION = 55 
local ROTATION_Y_SPEED = 3.8 
  
-- Static global variables 
local thisResource = getThisResource() 
local rootElement = getRootElement() 
local localPlayer = getLocalPlayer() 
local serverGravity = getGravity() 
  
-- 
-- Check for admin privileges 
-- 
local function canFly() 
return (isObjectInACLGroup("user."..getAccountName(getPlayerAccount(source)),aclGetGroup("Admin"))) 
end 
  
-- 
-- Utility functions 
-- 
local function isPlayerFlying(player) 
  local data = getElementData(player, "superman:flying") 
  if not data or data == false then return false 
  else return true end 
end 
  
local function setPlayerFlying(player, state) 
  if state == true then state = true 
  else state = false end 
  
  setElementData(player, "superman:flying", state) 
end 
  
local function iterateFlyingPlayers() 
  local current = 1 
  local allPlayers = getElementsByType("player") 
  
  return function() 
    local player 
     
    repeat 
      player = allPlayers[current] 
      current = current + 1 
    until not player or (isPlayerFlying(player) and isElementStreamedIn(player)) 
  
    return player 
  end 
end 
  
function Superman:restorePlayer(player) 
  setPlayerFlying(player, false) 
  setPedAnimation(player, false) 
  setElementVelocity(player, 0, 0, 0) 
  setElementRotation(player, 0, 0, 0) 
  --setPedRotation(player, getPedRotation(player)) 
  setElementCollisionsEnabled(player, true) 
  self:destroySmokeGenerators(player) 
  self.rotations[player] = nil 
  self.previousVelocity[player] = nil 
end 
  
function Superman:createSmokeGenerator(player) 
  local generator = createObject(2780, getElementPosition(player)) 
  setElementCollisionsEnabled(generator, false) 
  setObjectScale(generator, 0) 
  return generator 
end 
  
function Superman:createSmokeGenerators(player) 
  if not self.smokeGenerators[player] then 
    local smokeGenerators = {} 
  
    smokeGenerators[1] = self:createSmokeGenerator(player) 
    attachElements(smokeGenerators[1], player, 0.75, -0.2, -0.4, -40, 0, 60) 
    smokeGenerators[2] = self:createSmokeGenerator(player) 
    attachElements(smokeGenerators[2], player, -0.75, -0.2, -0.4, -40, 0, -60) 
  
    self.smokeGenerators[player] = smokeGenerators 
  end 
end 
  
function Superman:destroySmokeGenerators(player) 
  if self.smokeGenerators[player] then 
    for k, v in ipairs(self.smokeGenerators[player]) do 
      destroyElement(v) 
    end 
    self.smokeGenerators[player] = nil 
  end 
end 
  
function angleDiff(angle1, angle2) 
  angle1, angle2 = angle1 % 360, angle2 % 360 
  local diff = (angle1 - angle2) % 360 
  if diff <= 180 then 
    return diff 
  else 
    return -(360 - diff) 
  end 
end 
  
local function isElementInWater(ped) 
  local pedPosition = Vector3D:new(getElementPosition(ped)) 
  if pedPosition.z <= 0 then return true end 
  
  local waterLevel = getWaterLevel(pedPosition.x, pedPosition.y, pedPosition.z) 
  if not isElementStreamedIn(ped) or not waterLevel or waterLevel < pedPosition.z then 
    return false 
  else 
    return true 
  end 
end 
  
local function isnan(x) 
    math.inf = 1/0 
    if x == math.inf or x == -math.inf or x ~= x then 
        return true 
    end 
    return false 
end 
  
local function getVector2DAngle(vec) 
  if vec.x == 0 and vec.y == 0 then return 0 end 
  local angle = math.deg(math.atan(vec.x / vec.y)) + 90 
  if vec.y < 0 then 
    angle = angle + 180 
  end 
  return angle 
end 
  
-- 
-- Initialization and shutdown functions 
-- 
function Superman.Start() 
  local self = Superman 
  
  -- Register events 
  addEventHandler("onClientResourceStop", getResourceRootElement(thisResource), Superman.Stop, false) 
  addEventHandler("onPlayerJoin", rootElement, Superman.onJoin) 
  addEventHandler("onPlayerQuit", rootElement, Superman.onQuit) 
  addEventHandler("onClientRender", rootElement, Superman.processControls) 
  addEventHandler("onClientRender", rootElement, Superman.processFlight) 
  addEventHandler("onClientPlayerDamage", localPlayer, Superman.onDamage, false) 
  addEventHandler("onClientElementDataChange", rootElement, Superman.onDataChange) 
  addEventHandler("onClientElementStreamIn", rootElement, Superman.onStreamIn) 
  addEventHandler("onClientElementStreamOut", rootElement, Superman.onStreamOut) 
  
  -- Bind keys 
  bindKey("jump", "down", Superman.onJump) 
  
  -- Register commands 
  addCommandHandler("superman", Superman.cmdSuperman) 
  
  -- Initializate attributes 
  self.smokeGenerators = {} 
  self.rotations = {} 
  self.previousVelocity = {} 
end 
addEventHandler("onClientResourceStart", getResourceRootElement(thisResource), Superman.Start, false) 
  
function Superman.Stop() 
  local self = Superman 
  
  setGravity(serverGravity) 
  
  -- Restore all players animations, collisions, etc 
  for player in iterateFlyingPlayers() do 
    self:restorePlayer(player) 
  end 
end 
  
  
  
-- 
-- Join/Quit 
-- 
function Superman.onJoin(player) 
  local self = Superman 
  local player = player or source 
  
  setPlayerFlying(player, false) 
end 
  
function Superman.onQuit(reason, player) 
  local self = Superman 
  local player = player or source 
  
  if isPlayerFlying(player) then 
    self:restorePlayer(player) 
  end 
end 
  
  
-- 
-- onDamage: superman is invulnerable 
-- 
function Superman.onDamage()

razvan2299 · January 28, 2014

...So what should I do?

pa3ck · January 28, 2014

You should read the description:

"This superman script is not for all players, i modify it only for the team: Admins. I saw some superman who are restricted but it's not working so i made mine.

I just added a fonction: local function canFly()

return getTeamName(getPlayerTeam(getLocalPlayer())) == "Admins"

end"

TAPL · January 29, 2014

Client Side:

-- Copyright (c) 2008, Alberto Alonso 
-- 
-- All rights reserved. 
-- 
-- Redistribution and use in source and binary forms, with or without modification, 
-- are permitted provided that the following conditions are met: 
-- 
--     * Redistributions of source code must retain the above copyright notice, this 
--       list of conditions and the following disclaimer. 
--     * Redistributions in binary form must reproduce the above copyright notice, this 
--       list of conditions and the following disclaimer in the documentation and/or other 
--       materials provided with the distribution. 
--     * Neither the name of the superman script nor the names of its contributors may be used 
--       to endorse or promote products derived from this software without specific prior 
--       written permission. 
-- 
-- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
-- "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
-- LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
-- A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
-- CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
-- EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
-- PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
-- PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
-- LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
-- NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
-- SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
local Superman = {} 
  
function canceldamage() 
    cancelEvent() 
end 
addEventHandler("onClientPedDamage", getRootElement(), canceldamage) 
  
-- Settings 
local ZERO_TOLERANCE = 0.00001 
local MAX_ANGLE_SPEED = 6 -- In degrees per frame 
local MAX_SPEED = 1.0 
local EXTRA_SPEED_FACTOR = 1.85 
local LOW_SPEED_FACTOR = 0.40 
local ACCELERATION = 0.025 
local EXTRA_ACCELERATION_FACTOR = 1.8 
local LOW_ACCELERATION_FACTOR = 0.85 
local TAKEOFF_VELOCITY = 1.75 
local TAKEOFF_FLIGHT_DELAY = 750 
local SMOKING_SPEED = 1.25 
local GROUND_ZERO_TOLERANCE = 0.18 
local LANDING_DISTANCE = 3.2 
local FLIGHT_ANIMLIB = "swim" 
local FLIGHT_ANIMATION = "Swim_Dive_Under" 
local FLIGHT_ANIM_LOOP = false 
local IDLE_ANIMLIB = "cop_ambient" 
local IDLE_ANIMATION = "Coplook_loop" 
local IDLE_ANIM_LOOP = true 
local MAX_Y_ROTATION = 55 
local ROTATION_Y_SPEED = 3.8 
  
-- Static global variables 
local thisResource = getThisResource() 
local rootElement = getRootElement() 
local localPlayer = getLocalPlayer() 
local serverGravity = getGravity() 
  
-- 
-- Check for admin 
-- 
function canFly() 
    return getElementData(localPlayer, "canFly") 
end 
  
-- 
-- Utility functions 
-- 
local function isPlayerFlying(player) 
  local data = getElementData(player, "superman:flying") 
  if not data or data == false then return false 
  else return true end 
end 
  
local function setPlayerFlying(player, state) 
  if state == true then state = true 
  else state = false end 
  
  setElementData(player, "superman:flying", state) 
end 
  
local function iterateFlyingPlayers() 
  local current = 1 
  local allPlayers = getElementsByType("player") 
  
  return function() 
    local player 
    
    repeat 
      player = allPlayers[current] 
      current = current + 1 
    until not player or (isPlayerFlying(player) and isElementStreamedIn(player)) 
  
    return player 
  end 
end 
  
function Superman:restorePlayer(player) 
  setPlayerFlying(player, false) 
  setPedAnimation(player, false) 
  setElementVelocity(player, 0, 0, 0) 
  setElementRotation(player, 0, 0, 0) 
  --setPedRotation(player, getPedRotation(player)) 
  setElementCollisionsEnabled(player, true) 
  self:destroySmokeGenerators(player) 
  self.rotations[player] = nil 
  self.previousVelocity[player] = nil 
end 
  
function Superman:createSmokeGenerator(player) 
  local generator = createObject(2780, getElementPosition(player)) 
  setElementCollisionsEnabled(generator, false) 
  setObjectScale(generator, 0) 
  return generator 
end 
  
function Superman:createSmokeGenerators(player) 
  if not self.smokeGenerators[player] then 
    local smokeGenerators = {} 
  
    smokeGenerators[1] = self:createSmokeGenerator(player) 
    attachElements(smokeGenerators[1], player, 0.75, -0.2, -0.4, -40, 0, 60) 
    smokeGenerators[2] = self:createSmokeGenerator(player) 
    attachElements(smokeGenerators[2], player, -0.75, -0.2, -0.4, -40, 0, -60) 
  
    self.smokeGenerators[player] = smokeGenerators 
  end 
end 
  
function Superman:destroySmokeGenerators(player) 
  if self.smokeGenerators[player] then 
    for k, v in ipairs(self.smokeGenerators[player]) do 
      destroyElement(v) 
    end 
    self.smokeGenerators[player] = nil 
  end 
end 
  
function angleDiff(angle1, angle2) 
  angle1, angle2 = angle1 % 360, angle2 % 360 
  local diff = (angle1 - angle2) % 360 
  if diff <= 180 then 
    return diff 
  else 
    return -(360 - diff) 
  end 
end 
  
local function isElementInWater(ped) 
  local pedPosition = Vector3D:new(getElementPosition(ped)) 
  if pedPosition.z <= 0 then return true end 
  
  local waterLevel = getWaterLevel(pedPosition.x, pedPosition.y, pedPosition.z) 
  if not isElementStreamedIn(ped) or not waterLevel or waterLevel < pedPosition.z then 
    return false 
  else 
    return true 
  end 
end 
  
local function isnan(x) 
    math.inf = 1/0 
    if x == math.inf or x == -math.inf or x ~= x then 
        return true 
    end 
    return false 
end 
  
local function getVector2DAngle(vec) 
  if vec.x == 0 and vec.y == 0 then return 0 end 
  local angle = math.deg(math.atan(vec.x / vec.y)) + 90 
  if vec.y < 0 then 
    angle = angle + 180 
  end 
  return angle 
end 
  
-- 
-- Initialization and shutdown functions 
-- 
function Superman.Start() 
  local self = Superman 
  
  -- Register events 
  addEventHandler("onClientResourceStop", getResourceRootElement(thisResource), Superman.Stop, false) 
  addEventHandler("onPlayerJoin", rootElement, Superman.onJoin) 
  addEventHandler("onPlayerQuit", rootElement, Superman.onQuit) 
  addEventHandler("onClientRender", rootElement, Superman.processControls) 
  addEventHandler("onClientRender", rootElement, Superman.processFlight) 
  addEventHandler("onClientPlayerDamage", localPlayer, Superman.onDamage, false) 
  addEventHandler("onClientElementDataChange", rootElement, Superman.onDataChange) 
  addEventHandler("onClientElementStreamIn", rootElement, Superman.onStreamIn) 
  addEventHandler("onClientElementStreamOut", rootElement, Superman.onStreamOut) 
  
  -- Bind keys 
  bindKey("jump", "down", Superman.onJump) 
  
  -- Register commands 
  addCommandHandler("superman", Superman.cmdSuperman) 
  
  -- Initializate attributes 
  self.smokeGenerators = {} 
  self.rotations = {} 
  self.previousVelocity = {} 
end 
addEventHandler("onClientResourceStart", getResourceRootElement(thisResource), Superman.Start, false) 
  
function Superman.Stop() 
  local self = Superman 
  
  setGravity(serverGravity) 
  
  -- Restore all players animations, collisions, etc 
  for player in iterateFlyingPlayers() do 
    self:restorePlayer(player) 
  end 
end 
  
  
  
-- 
-- Join/Quit 
-- 
function Superman.onJoin(player) 
  local self = Superman 
  local player = player or source 
  
  setPlayerFlying(player, false) 
end 
  
function Superman.onQuit(reason, player) 
  local self = Superman 
  local player = player or source 
  
  if isPlayerFlying(player) then 
    self:restorePlayer(player) 
  end 
end 
  
  
-- 
-- onDamage: superman is invulnerable 
-- 
function Superman.onDamage() 
  local self = Superman

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