particle.h

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//       _________ __                 __
//      /   _____//  |_____________ _/  |______     ____  __ __  ______
//      \_____  \\   __\_  __ \__  \\   __\__  \   / ___\|  |  \/  ___/
//      /        \|  |  |  | \// __ \|  |  / __ \_/ /_/  >  |  /\___ |
//     /_______  /|__|  |__|  (____  /__| (____  /\___  /|____//____  >
//             \/                  \/          \//_____/            \/
//  ______________________                           ______________________
//                        T H E   W A R   B E G I N S
//         Stratagus - A free fantasy real time strategy game engine
//
//
//      (c) Copyright 2007-2008 by Jimmy Salmon and Francois Beerten
//
//      This program is free software; you can redistribute it and/or modify
//      it under the terms of the GNU General Public License as published by
//      the Free Software Foundation; only version 2 of the License.
//
//      This program is distributed in the hope that it will be useful,
//      but WITHOUT ANY WARRANTY; without even the implied warranty of
//      MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//      GNU General Public License for more details.
//
//      You should have received a copy of the GNU General Public License
//      along with this program; if not, write to the Free Software
//      Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
//      02111-1307, USA.
 
#ifndef __PARTICLE_H__
#define __PARTICLE_H__
 
 
#include <vector>
 
class CGraphic;
class CViewport;
 
 
struct CPosition {
        CPosition(float x, float y) : x(x), y(y) {}
        float x;
        float y;
};
 
class GraphicAnimation
{
        CGraphic *g;
        int ticksPerFrame;
        int currentFrame;
        int currTicks;
public:
        GraphicAnimation(CGraphic *g, int ticksPerFrame);
        ~GraphicAnimation() {}
 
        void draw(int x, int y);
 
        void update(int ticks);
 
        bool isFinished();
        bool isVisible(const CViewport &vp, const CPosition &pos);
        GraphicAnimation *clone();
};
 
 
 
// Base particle class
class CParticle
{
public:
        CParticle(CPosition position, int drawlevel = 0) :
                pos(position), destroyed(false), drawLevel(drawlevel)
        {}
        virtual ~CParticle() {}
 
        virtual bool isVisible(const CViewport &vp) const = 0;
        virtual void draw() = 0;
        virtual void update(int) = 0;
 
        inline void destroy() { destroyed = true; }
        inline bool isDestroyed() { return destroyed; }
 
        virtual CParticle *clone() = 0;
 
        int getDrawLevel() const { return drawLevel; }
        void setDrawLevel(int value) { drawLevel = value; }
 
protected:
        CPosition pos;
        bool destroyed;
        int drawLevel;
};
 
 
class StaticParticle : public CParticle
{
public:
        StaticParticle(CPosition position, GraphicAnimation *flame, int drawlevel = 0);
        virtual ~StaticParticle();
 
        virtual bool isVisible(const CViewport &vp) const;
        virtual void draw();
        virtual void update(int ticks);
        virtual CParticle *clone();
 
protected:
        GraphicAnimation *animation;
};
 
 
// Chunk particle
class CChunkParticle : public CParticle
{
public:
        CChunkParticle(CPosition position, GraphicAnimation *smokeAnimation, GraphicAnimation *debrisAnimation,
                                   GraphicAnimation *destroyAnimation,
                                   int minVelocity = 0, int maxVelocity = 400,
                                   int minTrajectoryAngle = 77, int maxTTL = 0, int drawlevel = 0);
        virtual ~CChunkParticle();
 
        virtual bool isVisible(const CViewport &vp) const;
        virtual void draw();
        virtual void update(int ticks);
        virtual CParticle *clone();
        int getSmokeDrawLevel() const { return smokeDrawLevel; }
        int getDestroyDrawLevel() const { return destroyDrawLevel; }
        void setSmokeDrawLevel(int value) { smokeDrawLevel = value; }
        void setDestroyDrawLevel(int value) { destroyDrawLevel = value; }
 
protected:
        CPosition initialPos;
        int initialVelocity;
        float trajectoryAngle;
        int maxTTL;
        int nextSmokeTicks;
        int lifetime;
        int age;
        int minVelocity;
        int maxVelocity;
        int minTrajectoryAngle;
        float height;
        int smokeDrawLevel;
        int destroyDrawLevel;
        GraphicAnimation *debrisAnimation;
        GraphicAnimation *smokeAnimation;
        GraphicAnimation *destroyAnimation;
 
        struct {
                float x;
                float y;
        } direction;
};
 
 
// Smoke particle
class CSmokeParticle : public CParticle
{
public:
        CSmokeParticle(CPosition position, GraphicAnimation *animation, float speedx = 0, float speedy = -22.0f, int drawlevel = 0);
        virtual ~CSmokeParticle();
 
        virtual bool isVisible(const CViewport &vp) const;
        virtual void draw();
        virtual void update(int ticks);
        virtual CParticle *clone();
 
protected:
        GraphicAnimation *puff;
        struct {
                float x;
                float y;
        } speedVector;
};
 
class CRadialParticle : public CParticle
{
public:
        CRadialParticle(CPosition position, GraphicAnimation *animation, int maxSpeed, int drawlevel = 0);
        virtual ~CRadialParticle();
 
        virtual bool isVisible(const CViewport &vp) const;
        virtual void draw();
        virtual void update(int ticks);
        virtual CParticle *clone();
 
protected:
        GraphicAnimation *animation;
        float direction;
        int speed;
        int maxSpeed;
};
 
 
class CParticleManager
{
public:
        CParticleManager();
        ~CParticleManager();
 
        static void init();
        static void exit();
 
        void prepareToDraw(const CViewport &vp, std::vector<CParticle *> &table);
        void endDraw();
 
        void update();
 
        void add(CParticle *particle);
        void clear();
 
        CPosition getScreenPos(const CPosition &pos) const;
 
        inline void setLowDetail(bool detail) { lowDetail = detail; }
        inline bool getLowDetail() const { return lowDetail; }
 
private:
        std::vector<CParticle *> particles;
        std::vector<CParticle *> new_particles;
        const CViewport *vp;
        unsigned long lastTicks;
        bool lowDetail;
};
 
extern CParticleManager ParticleManager;
 
 
#endif // !__PARTICLE_H__