source: trunk/orbital/particlesystem.h @ 1519 Tweet

//
// Orbital
//
// Copyright: (c) 2009-2012 Cédric Lecacheur <jordx@free.fr>
//            (c) 2009-2012 Benjamin Huet <huet.benjamin@gmail.com>
//            (c) 2012 Sam Hocevar <sam@hocevar.net>
//

/* FIXME: this file is pure crap; it's only a test. */

#if !defined __PARTICLESYSTEM_H__
#define __PARTICLESYSTEM_H__

class ParticleSystem : public WorldEntity
{
public:
    ParticleSystem()
      : m_angle(0.f),
        m_ready(false)
    {
        m_mesh.Compile("[sc#ccc acg8 2 5 5 1.5 1.5 .1 0 rx15 t0 -100 -30]");

        for (int i = 0; i < 200; i++)
            m_particles.Push(vec3(0), vec3(0), RandF(0.f, 2.f));
    }

    ~ParticleSystem()
    {
    }

    char const *GetName() { return "<particlesystem>"; }

protected:
    virtual void TickGame(float seconds)
    {
        WorldEntity::TickGame(seconds);

        for (int i = 0; i < m_particles.Count(); i++)
        {
            m_particles[i].m3 += seconds;
            if (m_particles[i].m3 > 2.f)
            {
                m_particles[i].m1 = vec3(RandF(-1.f, 1.f), RandF(-1.f, 1.f), RandF(-1.f, 1.f));
                m_particles[i].m2 = normalize(vec3(RandF(-1.f, 1.f), RandF(-1.f, 1.f), RandF(-1.f, 1.f)));
                m_particles[i].m3 = RandF(0.f, 2.f);
            }

            m_particles[i].m1 += seconds * 100.f * m_particles[i].m2;
        }

        m_angle += seconds * 100.f;
    }

    virtual void TickDraw(float seconds)
    {
        WorldEntity::TickDraw(seconds);

        if (!m_ready)
        {
            m_mesh.MeshConvert();
            m_ready = true;
        }

        for (int i = 0; i < m_particles.Count(); i++)
        {
            mat4 model = mat4::translate(vec3(0, 0, -100))
                       * mat4::translate(m_particles[i].m1);;

            m_mesh.Render(model);
        }
    }

private:
    EasyMesh m_mesh;
    Array<vec3, vec3, float> m_particles;
    float m_angle;
    bool m_ready;
};

#endif /* __PARTICLESYSTEM_H__ */