struct Light
{
    D3DXVECTOR3 pos;
    D3DXVECTOR4 color;
    float range;

    Light()
    {}

    Light(D3DXVECTOR3 _pos, D3DXVECTOR4 _col, float _range)
    {
        pos = _pos;
        color = _col;
        range = _range;
    }
};