local stickyEnabled = false
local me = getLocalPlayer()
local testMode
local oldMad=10010101099023980
function findRotation(x1,y1,x2,y2)

  local t = -math.deg(math.atan2(x2-x1,y2-y1))
  if t < 0 then t = t + 360 end;
  return t;

end
function isNumberBetweenPoints(number, pointa, pointb)
    return (number>pointa) and (number<pointb)
end
function isVehicleOnSteepSurface(veh)
    local x,y,z = getElementPosition(veh)
    local steepSurface,_,_,_,_,normalx,normaly,normalz=processLineOfSight(x,y,z+1,z,y,z-10,true,false,false,true,false,false,false,false,veh) --i suppose u know what to put in the veh arugments? yes i do =D
    if steepSurface then
        steepSurface = getDistanceBetweenPoints2D(normalx,normaly,0,0)>normalz
    else
        steepSurface = true
    end
    return steepSurface
end
function onRender()
    local veh = getPedOccupiedVehicle(me)
    if not veh then
        removeEventHandler("onClientRender",root,onRender)
        stickyEnabled = false
        outputChatBox("[VEH] Sticky wheels turned to: "..tostring(stickyEnabled))
        return
    end
    local vehicleIsSurfaced, gX,gY,gZ = isSurfaced(veh)
    local steepSurface = isVehicleOnSteepSurface(veh)
    if testMode ~= vehicleIsSurfaced then
        testMode = vehicleIsSurfaced
        outputDebugString("Is vehicle on a surface? : "..tostring(testMode))
    end
    if oldMad ~= steepSurface then
        oldMad = steepSurface
        outputDebugString("If on surface, is it steep? : "..tostring(oldMad))
    end
    if vehicleIsSurfaced and steepSurface then
        setVehicleGravity(veh, gX,gY,gZ)
    else
        setVehicleGravity(veh,0,0,-1)
    end
end

function getPositionBelowElement(element)
    local matrix = getElementMatrix (element)
    local offX = 0 * matrix[1][1] + 0 * matrix[2][1] - 1 * matrix[3][1] + matrix[4][1]
    local offY = 0 * matrix[1][2] + 0 * matrix[2][2] - 1 * matrix[3][2] + matrix[4][2]
    local offZ = 0 * matrix[1][3] + 0 * matrix[2][3] - 1 * matrix[3][3] + matrix[4][3]
    return offX,offY,offZ
end

function isSurfaced(element)
    local x,y,z = getElementPosition(element)
    local bX,bY,bZ = getPositionBelowElement(element)
    local nX,nY,nZ = bX-x,bY-y,bZ-z
    local isSurface, sX, sY, sZ, surfaceObj = processLineOfSight(x, y, z, bX,bY,bZ, true, false, false, true, false)
    return isSurface, nX,nY,nZ
end

function stopSticky()
    if stickyEnabled then
        removeEventHandler("onClientRender",root,onRender)
        veh = getPedOccupiedVehicle(me)
        if veh then
            setVehicleGravity(veh,0,0,-1)
        end
    else
        addEventHandler("onClientRender",root,onRender)
    end
    stickyEnabled = not stickyEnabled
    outputChatBox("[VEH] Sticky wheels turned to: "..tostring(stickyEnabled))
end

addCommandHandler("sticky",stopSticky)