Add the EggEntity

Now we can add awesome things to the game. [documentation still in progress, need to write a full sample project]

egg_entity.h

#ifndef _EggDropExample_EggEntity_h_
#define _EggDropExample_EggEntity_h_

#include "turtle_brains/tb_game_kit.h"

class EggEntity : public tbGame::Entity
{
public:
    EggEntity(float fallSpeed = 100.0f);
    virtual ~EggEntity(void);

protected:
    virtual void OnAdded(void) override;
    virtual void OnRemoved(void) override;
    virtual void OnSimulate(void) override;
    virtual void OnUpdate(const float deltaTime) override;
    virtual void OnRender(void) const override;
    virtual void OnCollideWith(tbGame::Entity& otherEntity) override;

private:
    tbGame::Sprite mSprite;
    float mFallSpeed;
};

#endif _EggDropExample_EggEntity_h_

egg_entity.cpp

#include "egg_entity.h"
#include "turtle_brains/tb_application_kit.h"

EggEntity::EggEntity(float fallSpeed) :
    tbGame::Entity("EggEntity"),
    mSprite("data/egg.png"),
    mFallSpeed(fallSpeed)
{
    mSprite.SetOrigin(tbGraphics::kAnchorCenter);
    AddGraphic(mSprite);

    AddBoundingCircle(16.0f);
}

EggEntity::~EggEntity(void)
{
}

void EggEntity::OnAdded(void)
{
    tbGame::Entity::OnAdded();
}

void EggEntity::OnRemoved(void)
{
    tbGame::Entity::OnRemoved();
}

void EggEntity::OnSimulate(void)
{
    tbGame::Entity::OnSimulate();

    const float kFixedTime(tbGame::GameTimer::GetSecondsPerStep());

    tbMath::Vector2 position(GetPosition());
    position.y += mFallSpeed * kFixedTime;
    SetPosition(position);

    if (position.y > tbGraphics::ScreenHeight())
    {   //The egg has hit the ground, splat.
        GetEntityManager()->RemoveEntity(this);
    }
}

void EggEntity::OnUpdate(const float deltaTime)
{
    tbGame::Entity::OnUpdate(deltaTime);
}

void EggEntity::OnRender(void) const
{
    tbGame::Entity::OnRender();
}

void EggEntity::OnCollideWith(tbGame::Entity& otherEntity)
{
    tbGame::Entity::OnCollideWith(otherEntity);
}

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