32 lines
934 B
C
32 lines
934 B
C
/**
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* Behavior for bhvDecorativePendulum.
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* This controls the pendulum that lies underneath the Tick Tock Clock painting.
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*/
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void bhv_decorative_pendulum_init(void) {
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o->oAngleVelRoll = 0x100;
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bhv_init_room();
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}
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/**
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* Smoothly swing the decorative pendulum back and forth using constant angular
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* acceleration.
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*/
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void bhv_decorative_pendulum_loop(void) {
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if (o->oFaceAngleRoll > 0)
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o->oAngleVelRoll -= 0x08;
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else
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o->oAngleVelRoll += 0x08;
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o->oFaceAngleRoll += o->oAngleVelRoll;
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/**
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* This if-statement is true twice in the span of 5 frames when
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* oAngleVelRoll takes values in {0x10, 0x08, 0x00, -0x08, -0x10}.
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* This means the sound we hear when the pendulum hits its upswing is
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* actually one sound played twice in rapid succession.
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*/
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if (o->oAngleVelRoll == 0x10 || o->oAngleVelRoll == -0x10)
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cur_obj_play_sound_2(SOUND_GENERAL_BIG_CLOCK);
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}
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