+/* angle to reach b from a */
+static f32 vg_angle_diff( f32 a, f32 b ){
+ f32 d = fmod(b,VG_TAUf)-fmodf(a,VG_TAUf);
+ if( fabsf(d) > VG_PIf )
+ d = -vg_signf(d) * (VG_TAUf - fabsf(d));
+
+ return d;
+}
+
+/*
+ * quantize float to bit count
+ */
+static u32 vg_quantf( f32 a, u32 bits, f32 min, f32 max ){
+ u32 mask = (0x1 << bits) - 1;
+ return vg_clampf((a - min) * ((f32)mask/(max-min)), 0.0f, mask );
+}
+
+/*
+ * un-quantize discreet to float
+ */
+static f32 vg_dequantf( u32 q, u32 bits, f32 min, f32 max ){
+ u32 mask = (0x1 << bits) - 1;
+ return min + (f32)q * ((max-min) / (f32)mask);
+}
+