R.O.C flag in cpp+c#

rocflag

in CPP------------------
unsigned int    CPixelBlueSkyWhiteSun::CalculatePixel(unsigned int x, unsigned int y)
{ unsigned int red = 0xffff0000;
    unsigned int white = 0xffffffff;
    unsigned int blue = 0xff0000ff;
    float w = m_width*0.5f;
    float h = m_height*0.5f;
    if ((float)x > w || (float)y > h)
    {
        return red;
    }
    float cX = w*0.5f;
    float cY = h*0.5f;
    float radius = cY*0.5f;
    Vec2 tri0(0.0f, -radius*1.65f);
    Vec2 tri1(-radius*0.2f, -radius*1.05f);     Vec2 tri2(radius*0.2f, -radius*1.05f);
    Vec2 P;
    float i = x - cX;
    float j = y - cY;
    float dis = sqrtf(i*i + j*j);
    if (dis < radius)
    {
        return white;
    }
    else if (dis > radius*1.65f)
    {
        return blue;
    }
    for (int m = 0; m < 12; m++)
    {
        P.x = i*m_list_cos[m] - j*m_list_sin[m];
        P.y = i*m_list_sin[m] + j*m_list_cos[m];
        if (IsPointInTriangle(tri0, tri1, tri2, P))
        {
            return white;
        }
    }
    return blue;
}


in C Sharp------------------------------
class CPixelBlueSkyWhiteSun : public IPixelEquation
{
    public:
    CPixelBlueSkyWhiteSun()
    {
        m_width = 1680;
        m_height = 1120;
        for (int i = 0; i < 12; i++)
        {
            m_list_sin[i] = sinf(i*PI/6);
            m_list_cos[i] = cosf(i*PI/6);
        }
    }
    const char*     GetName() const
    {          return "Blue Sky White Sun";   }
    unsigned int    CalculatePixel(unsigned int x, unsigned int y);
private:      float m_list_sin[12];      float m_list_cos[12];  };