FadeOutAction.hpp

/******************************************************************************
 
  nomlib - C++11 cross-platform game engine
 
Copyright (c) 2013, 2014 Jeffrey Carpenter <i8degrees@gmail.com>
All rights reserved.
 
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modification, are permitted provided that the following conditions are met:
 
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#ifndef NOMLIB_ACTIONS_FADE_OUT_ACTION_HPP
#define NOMLIB_ACTIONS_FADE_OUT_ACTION_HPP
 
#include <memory>
 
#include "nomlib/config.hpp"
#include "nomlib/actions/IActionObject.hpp"
#include "nomlib/math/Color4.hpp"
 
namespace nom {
 
// Forward declarations
class Sprite;

class FadeOutAction: public virtual IActionObject
{
  public:
    friend class ActionTest;
 
    typedef FadeOutAction self_type;
    typedef IActionObject derived_type;

    FadeOutAction(const std::shared_ptr<Sprite>& drawable, real32 seconds);
 
    virtual ~FadeOutAction();
 
    virtual std::unique_ptr<IActionObject> clone() const override;
 
    virtual IActionObject::FrameState next_frame(real32 delta_time) override;
 
    virtual IActionObject::FrameState prev_frame(real32 delta_time) override;
 
    virtual void pause(real32 delta_time) override;
 
    virtual void resume(real32 delta_time) override;
 
    virtual void rewind(real32 delta_time) override;
 
    virtual void release() override;
 
  private:
    static const char* DEBUG_CLASS_NAME;
 
    IActionObject::FrameState update(real32 t, real32 b, real32 c, real32 d);
 
    void first_frame(real32 delta_time);
    void last_frame(real32 delta_time);
 
    const real32 total_displacement_ = Color4i::ALPHA_OPAQUE;
    real32 initial_alpha_ = 0.0f;
 
    std::shared_ptr<Sprite> drawable_;

    uint8 alpha_ = 0;
};
 
} // namespace nom
 
#endif // include guard defined