source: trunk/orbital/starfield.h @ 1446 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 __STARFIELD_H__
#define __STARFIELD_H__

class StarField : public WorldEntity
{
public:
    StarField(int count, float z, float speed)
      : m_ready(false)
    {
        if (z == 1.f)
            m_mesh.Compile("sc#fff scb#fff0 ad4 1.8 1");
        else
            m_mesh.Compile("sc#fff scb#fff0 ad3 0.8 1");

        for (int i = 0; i < count; i++)
            m_stars.Push(vec3(RandF(-220.f, 220.f), z, RandF(-150.f, 300.f)),
                         vec3(0.f, 0.f, RandF(speed * 0.9f, speed * 1.1f)),
                         RandF(0.f, 10.f));
    }

    ~StarField()
    {
    }

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

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

        for (int i = 0; i < m_stars.Count(); i++)
        {
            m_stars[i].m3 += 10.f * seconds;
            m_stars[i].m1 += seconds * m_stars[i].m2;
            if (m_stars[i].m1.z > 300.f)
            {
                m_stars[i].m1.x = RandF(-220.f, 220.f);
                m_stars[i].m1.z = RandF(-152.f, -150.f);
            }
        }
    }

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

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

        for (int i = 0; i < m_stars.Count(); i++)
        {
            mat4 model = mat4::translate(m_stars[i].m1)
                       * mat4::rotate(m_stars[i].m3, 0.f, 1.f, 0.f);

            m_mesh.Render(model);
        }
    }

private:
    Mesh m_mesh;
    Array<vec3, vec3, float> m_stars;
    bool m_ready;
};

#endif /* __STARFIELD_H__ */