Function play_sound

src/SB/Game/zDiscoFloor.cpp:231–273

namespace
{
    void play_sound(z_disco_floor& df)
    {
        xVec3 var_48;

        xVec3Sub(&var_48, &df.bound.center, (xVec3*)&globals.player.ent.model->Mat->pos);

        if (xVec3Length2(&var_48) < SQR(df.bound.r) * SQR(1.5f) * SQR(1.5f))
        {
            df.curr_note++;

            if (df.curr_note >= 5)
            {
                df.curr_note = 5.0f * -xurand() - 5.0f;
            }

            F32 pitch = (df.curr_note >= 0) ? close_encounters[df.curr_note] :
                                              blues_scale[(S32)(6.0f * xurand() - 0.01f)];
            F32 pitch_offset = pitch;

            if (df.transition_delay < 0.05f)
            {
                pitch_offset += 17.0f;
            }
            else if (df.transition_delay > 1.0f)
            {
                pitch_offset += -10.0f;
            }
            else
            {
                F32 tmp = (df.transition_delay - 0.05f);
                tmp /= 0.95f;
                tmp = (1.0f - tmp) * 27.0f;
                tmp += -10.0f;

                pitch_offset += tmp;
            }

            xSndPlay3D(xStrHash("Disco_6_Alt"), 0.231f, pitch_offset, 0, 0, &df.bound.center,
                       0.75f * df.bound.r, 1.5f * df.bound.r, SND_CAT_GAME, 0.0f);

            df.sound_delay = 0.0f;
        }
    }

    size_t state_byte_size(size_t mask_size);