       Nez.Vector0Ext.Normalize(ref d0);       Nez.Vector0Ext.Normalize(ref d0);       Nez.Vector0Ext.Normalize(ref d0);       float cross00;       MathUtils.Cross(ref d0, ref d0, out cross00);       cross00 = Math.Abs(cross00);        float cross00;       MathUtils.Cross(ref d0, ref d0, out cross00);       cross00 = Math.Abs(cross00);        float cross00;       MathUtils.Cross(ref d0, ref d0, out cross00);       cross00 = Math.Abs(cross00);        