AIPaddle.cpp

#include "StdAfx.h"
#include "AIPaddle.h"
#include "Game.h"
#include "GameBall.h"

AIPaddle::AIPaddle() :
_velocity(0),
_maxVelocity(600.0f)
{
  Load("images/paddle.png");
  assert(IsLoaded());

  GetSprite().setOrigin(GetSprite().getLocalBounds().width /2, GetSprite().getLocalBounds().height / 2);
}


AIPaddle::~AIPaddle()
{
}

void AIPaddle::Draw(sf::RenderWindow & rw)
{
  VisibleGameObject::Draw(rw);
}

float AIPaddle::GetVelocity() const
{
  return _velocity;
}

void AIPaddle::Update(float elapsedTime)
{
  const GameBall* gameBall = static_cast<GameBall*>
    (Game::GetGameObjectManager().Get("Ball"));
  sf::Vector2f ballPosition = gameBall->GetPosition();

  if(GetPosition().x -20 < ballPosition.x)
    _velocity += 15.0f;
  else if(GetPosition().x +20 > ballPosition.x)
    _velocity -= 10.0f;
  else
    _velocity = 0.0f;


  if(_velocity > _maxVelocity)
    _velocity = _maxVelocity;

  if(_velocity < -_maxVelocity)
    _velocity = -_maxVelocity;


  sf::Vector2f pos = this->GetPosition();

  if(pos.x  <= GetSprite().getLocalBounds().width/2
    || pos.x >= (Game::SCREEN_WIDTH - GetSprite().getLocalBounds().width/2))
  {
    _velocity = -_velocity; // Bounce by current velocity in opposite direction
  }
  
  GetSprite().move(_velocity * elapsedTime, 0);
}