source: GTP/branches/IllumWPdeliver2008dec/IlluminationWP/demos/Standalone/Hierarchical Systems Demo [OpenGL]/RESOURCES/include/My3DGraphRes/Particle.h @ 3255

#pragma once

#include "Vector.h"

class Particle
{
public:
        Particle(void);
        ~Particle(void);

        Vector m_Color;
        bool refrcol;
        int m_ID;
        
private:
        Vector m_Position;
        Vector m_Velocity;

        
        float m_Size;
        float m_D_Size;
public:
        unsigned int m_Time_to_Live; //if 0 live forever
        unsigned int m_Age;

        void setPosition(Vector position);
        void setPosition(double x, double y, double z);
        Vector& getPosition(void);
        void getPosition(double& x, double& y, double& z);
        void setVelocity(Vector velocity){m_Velocity=velocity;}
        void setTimetoLive(unsigned int ttl){m_Time_to_Live=ttl;}
        void setSize(double size){m_Size=size;}
        double getSize(){return m_Size;}

        double m_Distance;
        
        bool operator < (Particle& op){return(m_Distance<op.m_Distance);}
        bool operator > (Particle& op){return(m_Distance>=op.m_Distance);}

        bool LiveMore(unsigned int Dt)
        {
                if(m_Time_to_Live==0)//live forever
                        return true;

                m_Age+=Dt;              

                if(m_Age>m_Time_to_Live)
                {
                        return false;
                }
                else 
                {                       
                        return true;
                }
                        
        }

        void Refresh(unsigned int Dt)
        {
        Vector dir=m_Velocity*(((double)Dt)/1000);
                m_Position+=dir;
                
                if(m_Time_to_Live!=0)
                {
                        float live=float(((float)(m_Age))/((float)(m_Time_to_Live)));                           
                        m_Color.w=sin(live*M_PI);       
                }
                                
        }

        Particle *m_NextParticle;
};