AnimatedHydraulic = {};

function AnimatedHydraulic.prerequisitesPresent(specializations)
return true;
end;

function AnimatedHydraulic:load(xmlFile)

self.setHydraulicDirection = SpecializationUtil.callSpecializationsFunction("setHydraulicDirection");

local hydraulicsCount = Utils.getNoNil(getXMLInt(xmlFile, "vehicle.hydraulics#count"), 0);
self.hydraulics = {};
for i=1, hydraulicsCount do
local hydraulicName = string.format("vehicle.hydraulics.hydraulic%d", i);
self.hydraulics[i] = {};
self.hydraulics[i].node = Utils.indexToObject(self.components, getXMLString(xmlFile, hydraulicName .. "#index"));
self.hydraulics[i].punch = Utils.indexToObject(self.components, getXMLString(xmlFile, hydraulicName .. "#punch"));
self.hydraulics[i].translationPunch = Utils.indexToObject(self.components, getXMLString(xmlFile, hydraulicName .. "#punchFixpoint"));
self.hydraulics[i].fixPoint = Utils.indexToObject(self.components, getXMLString(xmlFile, hydraulicName .. "#fixpoint"));
local xUp, yUp, zUp = Utils.getVectorFromString(Utils.getNoNil(getXMLString(xmlFile, hydraulicName .. "#upVectors"),"0 1 0"));
self.hydraulics[i].upVectors = {xUp, yUp, zUp};

local ax, ay, az;
if self.hydraulics[i].punch ~= nil then
ax, ay, az = getWorldTranslation(self.hydraulics[i].punch);
else
ax, ay, az = getWorldTranslation(self.hydraulics[i].node);
end;
if self.hydraulics[i].translationPunch ~= nil then
local bx, by, bz = getWorldTranslation(self.hydraulics[i].translationPunch);
self.hydraulics[i].punchDistance = Utils.vector3Length(ax-bx, ay-by, az-bz);
end;
end;
self.setHydraulicTime = 30;
end;

function AnimatedHydraulic:delete()
end;

function AnimatedHydraulic:mouseEvent(posX, posY, isDown, isUp, button)
end;

function AnimatedHydraulic:keyEvent(unicode, sym, modifier, isDown)
end;

function AnimatedHydraulic:update(dt)

if self:getIsActive() then
self.setHydraulicTime = 30;
end;

if self.setHydraulicTime > 0 then
for k,v in pairs(self.hydraulics) do
self:setHydraulicDirection(k);
end;
self.setHydraulicTime = self.setHydraulicTime - 1;
end;
end;

function AnimatedHydraulic:draw()
end;

function AnimatedHydraulic:setHydraulicDirection(index)
local hydraulic = self.hydraulics[index];

if hydraulic.fixPoint ~= nil then
local ax, ay, az = getWorldTranslation(hydraulic.node);
local bx, by, bz = getWorldTranslation(hydraulic.fixPoint);
local x, y, z = worldDirectionToLocal(getParent(hydraulic.node), bx-ax, by-ay, bz-az);
local xUp, yUp, zUp = unpack(hydraulic.upVectors);
setDirection(hydraulic.node, x, y, z, xUp, yUp, zUp);
if hydraulic.punch ~= nil then
local distance = Utils.vector3Length(ax-bx, ay-by, az-bz);
setTranslation(hydraulic.punch, 0, 0, distance-hydraulic.punchDistance);
end;
end;
end;