Function zNPCBubbleBuddy_AlphaUpdate

src/SB/Game/zNPCTypeVillager.cpp:2192–2197

}

void zNPCBubbleBuddy_AlphaUpdate(F32 dt)
{
    static F32 tmr_pulseAlpha = 0.0f; // non-matching: stfs too late
    F32 angle = NPCC_TmrCycle(&tmr_pulseAlpha, dt, 1.5f) * PI;
    zNPCBubbleBuddy::alf_currBubBud = LERP(MAX(0.0f, MIN(xabs(isin(angle)), 1.0f)), 0.5f, 0.5f);
}

static U32 bb_env_texture = 0;
static U32 bb_fresnel_texture = 0;