PC Format (South-Africa) 2001 June/PCFJune.iso/Xenon/XenonSource.exe/demo2/actor.h

C/C++ Source or Header | 2000-09-13 | 5.8 KB | 263 lines

//-------------------------------------------------------------
//
// Class:    CActor
//
// Author:    John M Phillips
//
// Started:    06/05/00
//
// Base:    None
//
// Derived:    CShip
//            CAlien
//            CBullet
//            CPickup
//
//-------------------------------------------------------------

#ifndef _INCLUDE_ACTOR_H
#define _INCLUDE_ACTOR_H

#include "gamesystem.h"
#include "actorinfo.h"

class CShip;
class CScene;

//-------------------------------------------------------------

struct Controls
{
    bool left;                // true if left control held
    bool right;                // true if right control held
    bool up;                // true if up control held
    bool down;                // true if down control held
    bool fire;                // true if fire control held
    bool firePressed;        // true if fire control has just been pressed
    bool divePressed;        // true if dive control has just been pressed
    bool reversePressed;    // true if reverse control has just been pressed
    gsKeyCode key;            // latest key press
};

//-------------------------------------------------------------
// Actor Info for creating actors
/*
struct ActorInfo
{
    ActorType m_type;            // type of actor
    char *m_filename;            // file containing sprite frames
    int m_hotspot_x;            // hotspot position (i.e. offset to centre)
    int m_hotspot_y;
    float m_anim_rate;            // animation rate (in frames per second)
    int m_initial_shield;        // initial shield value
    int m_kill_bonus;            // score bonus for killing actor
};
*/
//-------------------------------------------------------------

typedef enum {
    ANIMATE_LOOP,                // cycle repeatedly through frames
    ANIMATE_ONESHOT,            // cycle once then flag as finished
} AnimationMode;

//-------------------------------------------------------------

const float ACTOR_HIT_TIME = 0.1f;    // time in seconds for hit to register

const int INFINITE_SHIELD = -1;

//-------------------------------------------------------------

class CActor
{
    private:

        CActor *m_owner;            // owner
        bool m_is_active;
        gsCTimer m_hit_timer;        // for animation of hit

    protected:

        CScene *m_scene;            // scene containing this actor

        gsCVector m_position;        // relative to map
        gsCVector m_velocity;
        int m_shield;                // shield strength
        gsCSprite m_sprite;
        gsCTiledImage *m_image;
        gsCTimer m_timer;            // for animation

        bool m_is_on_screen;

        bool m_is_hit;

        float m_score_multiplier;

    public:

        CActor();
        virtual ~CActor();

        virtual const ActorInfo& getActorInfo() = 0;

        virtual bool activate();
        virtual void kill();
        virtual void explode();
        virtual bool update(Controls *controls = 0) = 0;
        virtual bool draw();
        virtual void registerHit(int energy,CActor *hitter);

        virtual void onKilled();
        virtual void onLeavingScreen();
        virtual void onCollisionWithActor(CActor *actor);
        virtual void postProcessCollision();

        bool isActive();
        bool isOnScreen();
        bool isHit();

        gsCVector getPosition();
        gsCVector getVelocity();
        CActor *getOwner();
        int getShield();
        int getDirection(int num_dir);
        virtual gsCRect getCollisionRect();

        void setPosition(const gsCVector& position);
        void setVelocity(const gsCVector& velocity);
        void setOwner(CActor *owner);
        void setScene(CScene *scene);
        void setShield(int shield);

        bool animate(AnimationMode mode);
        bool animate(AnimationMode mode,int first_frame,int num_frames);

        void increaseScoreMultiplier(float amount);
};

//-------------------------------------------------------------

inline bool CActor::isActive()
{
    return m_is_active;
}

//-------------------------------------------------------------

inline gsCVector CActor::getPosition()
{
    return m_position;
}

//-------------------------------------------------------------

inline gsCVector CActor::getVelocity()
{
    return m_velocity;
}

//-------------------------------------------------------------

inline void CActor::setPosition(const gsCVector& position)
{
    m_position = position;
}

//-------------------------------------------------------------

inline void CActor::setVelocity(const gsCVector& velocity)
{
    m_velocity = velocity;
}

//-------------------------------------------------------------

inline bool CActor::isOnScreen()
{
    return m_is_on_screen;
}

//-------------------------------------------------------------

inline bool CActor::isHit()
{
    return m_is_hit;
}

//-------------------------------------------------------------
// Overridable

inline gsCRect CActor::getCollisionRect()
{
    return m_sprite.getRect();
}

//-------------------------------------------------------------
// Overridable

inline void CActor::onLeavingScreen()
{
}

//-------------------------------------------------------------
// Overridable

inline void CActor::onCollisionWithActor(CActor *actor)
{
}

//-------------------------------------------------------------
// Overridable

inline void CActor::postProcessCollision()
{
}

//-------------------------------------------------------------

inline void CActor::setOwner(CActor *owner)
{
    m_owner = owner;
}

//-------------------------------------------------------------

inline void CActor::setScene(CScene *scene)
{
    m_scene = scene;
}

//-------------------------------------------------------------

inline CActor *CActor::getOwner()
{
    return m_owner;
}

//-------------------------------------------------------------

inline void CActor::setShield(int shield)
{
    m_shield = shield;
}

//-------------------------------------------------------------

inline int CActor::getShield()
{
    return m_shield;
}

//-------------------------------------------------------------

inline void CActor::increaseScoreMultiplier(float amount)
{
    m_score_multiplier += amount;
}

//-------------------------------------------------------------

#endif