sm64

A Super Mario 64 decompilation
Log | Files | Refs | README | LICENSE

beta_chest.inc.c (2546B)

      1 
      2 /**
      3  * Behavior for bhvBetaChestBottom and bhvBetaChestLid.
      4  * These are apparently the beta versions of chests.
      5  * They do not spawn stars or appear in groups; they only
      6  * open and spawn an air bubble. In other words, they're
      7  * practically the same as underwater chests in-game, except
      8  * without any star-giving or puzzle functionality.
      9  */
     10 
     11 /**
     12  * Init function for bhvBetaChestBottom.
     13  */
     14 void bhv_beta_chest_bottom_init(void) {
     15     // Set the object's model
     16     cur_obj_set_model(MODEL_TREASURE_CHEST_BASE);
     17 
     18     // ??? Pointless code?
     19     // Maybe chests were originally intended to have random yaws.
     20     // Shoshinkai 1995 footage shows chests in DDD scattered around
     21     // a point with different yaws. Maybe this feature was lazily
     22     // cancelled by setting the yaw to 0, right before this beta
     23     // object was discarded?
     24     o->oMoveAngleYaw = random_u16();
     25     o->oMoveAngleYaw = 0;
     26 
     27     // Spawn the chest lid 97 units in the +Y direction and 77 units in the -Z direction.
     28     spawn_object_relative(0, 0, 97, -77, o, MODEL_TREASURE_CHEST_LID, bhvBetaChestLid);
     29 }
     30 
     31 /**
     32  * Update function for bhvBetaChestBottom.
     33  * This gives the chest a "virtual hitbox" that pushes Mario away
     34  * with radius 200 units and height 200 units.
     35  */
     36 void bhv_beta_chest_bottom_loop(void) {
     37     cur_obj_push_mario_away_from_cylinder(200.0f, 200.0f);
     38 }
     39 
     40 /**
     41  * Update function for bhvBetaChestLid.
     42  * The chest lid handles all the logic of the chest,
     43  * namely opening the chest and spawning an air bubble.
     44  */
     45 void bhv_beta_chest_lid_loop(void) {
     46     switch (o->oAction) {
     47         case BETA_CHEST_ACT_IDLE_CLOSED:
     48             if (dist_between_objects(o->parentObj, gMarioObject) < 300.0f) {
     49                 o->oAction++; // Set to BETA_CHEST_ACT_OPENING
     50             }
     51 
     52             break;
     53 
     54         case BETA_CHEST_ACT_OPENING:
     55             if (o->oTimer == 0) {
     56                 // Spawn the bubble 80 units in the -Y direction and 120 units in the +Z direction.
     57                 spawn_object_relative(0, 0, -80, 120, o, MODEL_BUBBLE, bhvWaterAirBubble);
     58                 play_sound(SOUND_GENERAL_CLAM_SHELL1, o->header.gfx.cameraToObject);
     59             }
     60 
     61             // Rotate the lid 0x400 (1024) angle units per frame backwards.
     62             // When the lid becomes vertical, stop rotating.
     63             o->oFaceAnglePitch -= 0x400;
     64             if (o->oFaceAnglePitch < -0x4000) {
     65                 o->oAction++; // Set to BETA_CHEST_ACT_IDLE_OPEN
     66             }
     67 
     68             // fallthrough
     69         case BETA_CHEST_ACT_IDLE_OPEN:
     70             break;
     71     }
     72 }