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ParticleSystem.h

/*
  File: ParticleSystem.h

  Copyright(C) C. Kotterink, Computed Graphics
*/
#ifndef PARTICLESYSTEM_H
#define PARTICLESYSTEM_H

#include<Object.h>

#include<AABoundingBox.h>
#include<Color4.h>
#include<Vertex3.h>

#include<vector>

class RenderContext;

class ParticleSystem : public Object
{
public:
    class Particle {
        friend ParticleSystem;

        Vertex3 position;
        Vertex3 velocity;
        real life;
        real size;
    };
    typedef enum BlendType {
        Smoke,
        Glow
    };

    ParticleSystem(unsigned int maxSize = 100);
    ParticleSystem(const Vertex3 &pos, unsigned int maxSize = 100);
    virtual ~ParticleSystem();

    unsigned int getSize() const {
        return maxSize;
    }
    void setSize(unsigned int maxSize);
    const Color4 &getColor() const {
        return color;
    }
    float getAngle() const {
        return angle;
    }
    void setAngle(float a) {
        angle = a;
    }
    float getLife() const {
        return maxLife;
    }
    void setLife(float life) {
        maxLife = life;
    }
    void setColor(const Color4 &c) {
        color = c;
    }
    bool getGravity() const {
        return gravity;
    }
    void setGravity(bool b) {
        gravity = b;
    }
    BlendType getBlendType() const {
        return blendType;
    }
    void setBlendType(BlendType b) {
        blendType = b;
    }
    const Vertex3 &getPosition() const {
        return position;
    }
    void setPosition(const Vertex3 &p) {
        position = p;
    }
    Vertex3 getDirection() const {
        return direction*speed;
    }
    void setDirection(const Vertex3 &d);

    // Object
    bool update(World &world);
    void render(
        RenderContext &rc,
        RenderContext::Visibility visibility = RenderContext::PartlyVisible);
    void write(WDFFile &f);
    void read(WDFFile &f);

private:
    typedef vector<Particle> ParticleList;

    void addParticle();
    void deleteParticle(unsigned int i);

    // Parmeters
    Vertex3 position;
    Vertex3 direction;
    Color4 color;
    float angle;
    float maxLife;
    unsigned int maxSize;
    bool gravity;
    BlendType blendType;

    float speed;
    unsigned int size;
    ParticleList particle;
};
#endif

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