--
-- physicalCamera
-- Specialization for physically adapting Camera
--
-- @author  Knagsted
-- @date  3/04/10
--

-- Do not edit without my permission
--
physicalCamera = {};

function physicalCamera.prerequisitesPresent(specializations)
     return SpecializationUtil.hasSpecialization(Steerable, specializations);
end;

function physicalCamera:load(xmlFile)
  self.cameraRotNode = Utils.indexToObject(self.components, getXMLString(xmlFile, "vehicle.cameraRotNode#index"));
  self.seatNode = Utils.indexToObject(self.components, getXMLString(xmlFile, "vehicle.seatNode#index"));
  self.farmerNode = Utils.indexToObject(self.components, getXMLString(xmlFile, "vehicle.characterNode#index"));
   
  if self.cameraRotNode ~=nil then
   local x,y,z = getTranslation(self.cameraRotNode);
   self.startXTranslation = x;
   self.startYTranslation = y;
   self.startZTranslation = z;
  end;
   
  if self.seatNode ~=nil then
   local x,y,z = getTranslation(self.seatNode);
   self.startSeatXTranslation = x;
   self.startSeatYTranslation = y;
   self.startSeatZTranslation = z;
  end;

  if self.farmerNode ~=nil then
   local x,y,z = getTranslation(self.farmerNode);
   self.startFarmerXTranslation = x;
   self.startFarmerYTranslation = y;
   self.startFarmerZTranslation = z;
  end;
   
  --Sounds
  SeatSoundFile = Utils.getFilename("sounds/seatSound.ogg", self.baseDirectory);
     self.SeatSoundId = createSample("SeatSound");
     loadSample(self.SeatSoundId, SeatSoundFile, false);
     self.SeatPlaying = false;
  self.SeatSoundOffset = getSampleDuration(self.SeatSoundId);
   
  self.averageYTranslation = self.startYTranslation;
  self.camTranslation = self.startYTranslation;
  self.maxTranslationPrCycle = 0.00008;
  self.offsetTranslation = 0.0;
  self.offsetAdjustmentTranslation = 0;
   
  if self.wheels[3].repr ~= nil and self.wheels[3].repr ~= nil then
   local x,y,z = getTranslation(self.wheels[3].repr);
   local x2,y2,z2 = getTranslation(self.wheels[3].repr);

   self.averageYTranslation = (y + y2)/2;
  end;
   
  self.camTranslation = self.averageYTranslation;
   
end;

function physicalCamera:delete()
  if self.SeatPlaying ~= nil then
   stopSample(self.SeatSoundId);
  end;
end;

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

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

function physicalCamera:update(dt)
  if self.wheels[3].repr ~= nil and self.wheels[3].repr ~= nil then
   local x,y,z = getTranslation(self.wheels[3].repr);
   local x2,y2,z2 = getTranslation(self.wheels[4].repr);

   self.averageYTranslation = (y + y2)/2;
  end;
   
  self.playSeatSound = false;
  if self.camTranslation > self.averageYTranslation then
   self.camTranslation = self.camTranslation - self.maxTranslationPrCycle * dt;
   if self.camTranslation < self.averageYTranslation then
    self.camTranslation = self.averageYTranslation;
   end;
  elseif self.camTranslation < self.averageYTranslation then
   self.camTranslation = self.camTranslation + self.maxTranslationPrCycle * dt;
   if self.camTranslation > self.averageYTranslation then
    self.camTranslation = self.averageYTranslation;
   end;
   --set sound to play if seat damping is very big.
   if self.camTranslation < self.averageYTranslation - 0.0002 and self.isEntered then
    self.playSeatSound = true;
   end;
  end;
   
  if self.cameraRotNode ~= nil then
   setTranslation(self.cameraRotNode, self.startXTranslation, self.camTranslation+self.offsetAdjustmentTranslation, self.startZTranslation);
  end;
   
  --setup offsetAdjustmentTranslation accoding to weight on tractor
  if self.currentWeight ~= nil then
   self.offsetAdjustmentTranslation = 0-self.currentWeight * 0.00083;
  else
   self.offsetAdjustmentTranslation = 0;
  end;
   
  self.offsetTranslation = self.camTranslation - self.startYTranslation;
   
  local adjustedOffsetTranslation = (self.offsetTranslation)+self.offsetAdjustmentTranslation;
   
  if self.seatNode ~= nil then
   setTranslation(self.seatNode, self.startSeatXTranslation, self.startSeatYTranslation + adjustedOffsetTranslation, self.startSeatZTranslation);
  end;
   
  if self.farmerNode ~= nil then
   setTranslation(self.farmerNode, self.startFarmerXTranslation, self.startFarmerYTranslation+adjustedOffsetTranslation, self.startFarmerZTranslation);
  end;
   
  if self.seatNode ~= nil and self.camIndex == self.indoorCamIndex then  -- uses information from InteractiveControl
   if self.playSeatSound then
    if not self.SeatPlaying then
     playSample(self.SeatSoundId, 0, 0.75, 0);
     self.SeatPlaying = true;
    end;
   else
    if self.SeatPlaying then
     stopSample(self.SeatSoundId);
     self.SeatPlaying = false;
    end;
   end;
  else
   if self.SeatPlaying then
    stopSample(self.SeatSoundId);
    self.SeatPlaying = false;
   end;  
  end;
end;

function physicalCamera:onLeave()
end;

function physicalCamera:draw()
end;