#define RAD2DEG(a) ((a) * (180.0f / (float) M_PI))
#define ANGLEMOD(a) ((a) - 360.0 * floor((a) / 360.0))
+#define Q_rint(x) ((x) > 0 ? (int)((x) + 0.5) : (int)((x) - 0.5)) //johnfitz -- from joequake
+
#define DotProduct2(a,b) ((a)[0]*(b)[0]+(a)[1]*(b)[1])
#define Vector2Clear(a) ((a)[0]=(a)[1]=0)
#define Vector2Compare(a,b) (((a)[0]==(b)[0])&&((a)[1]==(b)[1]))