void Impire::Circle(int x, int y, float radius,  D3DCOLOR color, IDirect3DDevice9* pDevice)
{
    const DWORD D3D_FVF = D3DFVF_XYZRHW | D3DFVF_DIFFUSE | D3DFVF_TEX1;
    const int NUMPOINTS = 24;
    const float PI = ( float )3.141592654f;
    LineVertex Circle[NUMPOINTS + 1];
    float X, Y, Theta, WedgeAngle;
    WedgeAngle = (float)((2*PI) / NUMPOINTS);

    for(int i=0; i<=NUMPOINTS; i++)
    {
        Theta = i * WedgeAngle;
        X = (float)(x + radius * cos(Theta));
        Y = (float)(y - radius * sin(Theta));
        Circle[i] = CreateD3DTLVERTEX(X, Y, 0.0f, 1.0f, color, 0.0f, 0.0f);
    }
    pDevice->SetFVF(D3D_FVF);
    pDevice->SetTexture(0, NULL);
    pDevice->DrawPrimitiveUP(D3DPT_LINESTRIP, NUMPOINTS, &Circle[0], sizeof(Circle[0]));
}