/// <summary>
/// 向量夹角
/// </summary>
/// <param name="v1"></param>
/// <param name="v2"></param>
/// <returns>返回值范围：[0,360)</returns>
public static float Angle(GVector2 v1, GVector2 v2)
{
float v = GMath.Atan(v1.x, v1.y) - GMath.Atan(v2.x, v2.y);
if (v < 0)
{
v += 360;
}
return(v);
}
public static void gmathtest(float[] c)
{
int i = 0;
c[i++] = GMath.Abs((long)-42.3F);
c[i++] = GMath.Acos(42.3F);
c[i++] = GMath.Asin(42.3F);
c[i++] = GMath.Atan(42.3F);
c[i++] = GMath.Atan2(42.3F, 3.8F);
c[i++] = GMath.Ceiling(42.3F);
c[i++] = GMath.Cos(42.3F);
c[i++] = GMath.Cosh(2.3F);
c[i++] = GMath.E;
c[i++] = GMath.Exp(1.3F);
c[i++] = GMath.Floor(3.9F);
c[i++] = GMath.Log(5.8F);
c[i++] = GMath.Log10(3.5F);
c[i++] = GMath.Max(4.8F, 4.9F);
c[i++] = GMath.Min(4.8F, 4.9F);
c[i++] = GMath.PI;
c[i++] = GMath.Pow(4.4F, 2.3F);
c[i++] = GMath.Round(5.5F);
c[i++] = GMath.Sin(4.2F);
c[i++] = GMath.Sinh(3.1F);
c[i++] = GMath.Sqrt(8.1F);
c[i++] = GMath.Sqrt(-1.0F);
c[i++] = GMath.Tan(4.3F);
c[i++] = GMath.Tanh(8.1F);
//c[i++] = (float)(Single.IsNaN(GMath.Sqrt(-1.0F)) ? 1.0F : 0.0F);//GMath.Sqrt(-1.0F)
c[i++] = GMath.Truncate(10.14334325F);
float zero = 0.0F;
c[i++] = Single.IsInfinity(1 / zero) ? 1.0F : 0.0F;
c[60] = Single.PositiveInfinity;
c[61] = Single.NegativeInfinity;
c[62] = Single.NaN;
}