Particle.h

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#pragma once

#include <vlCore/Vector3.hpp>
#include <vlCore/Matrix4.hpp>
#include <vlCore/Image.hpp>
#include "ParticleMap.h"
#include "Globals.h"

#include <vector>


class Particle
{
public:
        Particle(const vl::vec3 &pos, const vl::vec3 &dir, int w, int h, int d);
        ~Particle(void);

        void prepareUpdate(
                vl::ref<vl::Image> image, vl::ref<vl::Image> gradient, vl::ref<vl::Image> curvature, ParticleMap &map, 
                const std::vector<vl::vec3> &candidatePositions,
                std::vector<bool> &spawnMap,
                // curvature
                float kC, 
                // flocking
                float kF, float flockSigma, 
                // user preferred direction
                float kD, const vl::vec3 &userDir, 
                // repulsion
                float kR, float sigmaRepulse, 
                // particle dying
                bool enableDying, float crowdedThreshold, float crowdedSigma, int dyingNeighborhood,
                // global stuff
                float density, bool stick);
        void updateMap(ParticleMap &map, float dt);
        void addToMap(ParticleMap &map);
        void update(float dt);

        vl::vec3 getDirection() const { return _direction; }

        vl::vec3 getPosition() const { return _position; }

        vl::vec3 getWorldPosition() const;
private:
        bool outOfBounds(const vl::vec3 &dir) const;

        vl::vec3 _position;
        vl::vec3 _direction;
        vl::vec3 _nextDirection;
        int _width;
        int _height;
        int _depth;

        vl::vec3 _nextPosition;
        bool _wasDeath;
};