Use a helper macro for pi*2

1 files changed, 3 insertions, 4 deletions

diff --git a/Alc/effects/flanger.c b/Alc/effects/flanger.c
index d3cdd250..78be5e42 100644
--- a/Alc/effects/flanger.c
+++ b/Alc/effects/flanger.c
@@ -122,7 +122,7 @@ static ALvoid ALflangerState_update(ALflangerState *state, ALCdevice *Device, co
              if(rate == 0.0f)
                  state->lfo_coeff = 0.0f;
              else
-                 state->lfo_coeff = F_PI * 2.0f / (frequency / rate);
+                 state->lfo_coeff = F_2PI / (frequency / rate);
              break;
     }
 
@@ -152,12 +152,11 @@ static inline void Sinusoid(ALint *delay_left, ALint *delay_right, ALint offset,
 {
     ALfloat lfo_value;
 
-    lfo_value = 1.0f + sinf(fmodf(state->lfo_coeff * offset, 2.0f*F_PI));
+    lfo_value = 1.0f + sinf(fmodf(state->lfo_coeff * offset, F_2PI));
     lfo_value *= state->depth * state->delay;
     *delay_left = fastf2i(lfo_value) + state->delay;
 
-    lfo_value = 1.0f + sinf(fmodf(state->lfo_coeff * (offset+state->lfo_disp),
-                                  2.0f*F_PI));
+    lfo_value = 1.0f + sinf(fmodf(state->lfo_coeff * (offset+state->lfo_disp), F_2PI));
     lfo_value *= state->depth * state->delay;
     *delay_right = fastf2i(lfo_value) + state->delay;
 }