sm64

A Super Mario 64 decompilation
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pyramid_top.inc.c (5034B)

      1 
      2 /**
      3  * Behaviors for bhvPyramidTop, bhvPyramidTopFragment, and
      4  * bhvPyramidPillarTouchDetector.
      5  *
      6  * bhvPyramidTop controls Shifting Sand Land's pyramid's top piece, which
      7  *      rotates and explodes when Mario stands on all four pillars.
      8  * bhvPyramidTopFragment controls the shards that the pyramid's top emits when
      9  *      it is spinning and exploding.
     10  * bhvPyramidPillarTouchDetector controls the intangible collision boxes that
     11  *      Mario touches when on top of each pillar.
     12  */
     13 
     14 /**
     15  * Spawn the four pillars' touch detectors.
     16  */
     17 void bhv_pyramid_top_init(void) {
     18     spawn_object_abs_with_rot(o, 0, MODEL_NONE, bhvPyramidPillarTouchDetector,
     19                               1789, 1024, 764, 0, 0, 0);
     20     spawn_object_abs_with_rot(o, 0, MODEL_NONE, bhvPyramidPillarTouchDetector,
     21                               1789, 896, -2579, 0, 0, 0);
     22     spawn_object_abs_with_rot(o, 0, MODEL_NONE, bhvPyramidPillarTouchDetector,
     23                               -5883, 1024, -2579, 0, 0, 0);
     24     spawn_object_abs_with_rot(o, 0, MODEL_NONE, bhvPyramidPillarTouchDetector,
     25                               -5883, 1024, 764, 0, 0, 0);
     26 }
     27 
     28 /**
     29  * Animate the pyramid top as rising and then spinning. Generate some pyramid
     30  * fragments in the process.
     31  */
     32 void bhv_pyramid_top_spinning(void) {
     33     // (TODO: What is this doing)
     34     o->oPosX = o->oHomeX + sins(o->oTimer * 0x4000) * 40.0f;
     35 
     36     // At first, move upward smoothly without rotating.
     37     if (o->oTimer < 60) {
     38         o->oPosY = o->oHomeY + absf_2(sins(o->oTimer * 0x2000) * 10.0f);
     39     } else {
     40         // Then, rotate at an accelerating rate, and move upward at a constant rate.
     41         o->oAngleVelYaw += 0x100;
     42         if (o->oAngleVelYaw > 0x1800) {
     43             o->oAngleVelYaw = 0x1800;
     44             o->oVelY = 5.0f;
     45         }
     46 
     47         o->oFaceAngleYaw += o->oAngleVelYaw;
     48         o->oPosY += o->oVelY;
     49     }
     50 
     51     // Every frame until 90 frames have passed, generate a pyramid fragment
     52     // with a random velocity and angle.
     53     if (o->oTimer < 90) {
     54         struct Object *pyramidFragment = spawn_object(o, MODEL_DIRT_ANIMATION, bhvPyramidTopFragment);
     55         pyramidFragment->oForwardVel = random_float() * 10.0f + 20.0f;
     56         pyramidFragment->oMoveAngleYaw = random_u16();
     57         pyramidFragment->oPyramidTopFragmentsScale = 0.8f;
     58         pyramidFragment->oGravity = random_float() + 2.0f;
     59     }
     60 
     61     // After enough time, transition to the exploding state.
     62     if (o->oTimer == 150) {
     63         o->oAction = PYRAMID_TOP_ACT_EXPLODE;
     64     }
     65 }
     66 
     67 /**
     68  * Explode the pyramid top, generating dust and pyramid fragments.
     69  */
     70 void bhv_pyramid_top_explode(void) {
     71     struct Object *pyramidFragment;
     72     s16 i;
     73 
     74     spawn_mist_particles_variable(0, 0, 690.0f);
     75 
     76     // Generate 30 pyramid fragments with random properties.
     77     for (i = 0; i < 30; i++) {
     78         pyramidFragment = spawn_object(o, MODEL_DIRT_ANIMATION, bhvPyramidTopFragment);
     79         pyramidFragment->oForwardVel = random_float() * 50 + 80;
     80         pyramidFragment->oVelY = random_float() * 80 + 20;
     81         pyramidFragment->oMoveAngleYaw = random_u16();
     82         pyramidFragment->oPyramidTopFragmentsScale = 3;
     83         pyramidFragment->oGravity = random_float() * 2 + 5;
     84     }
     85 
     86     // Deactivate the pyramid top.
     87     o->activeFlags = ACTIVE_FLAG_DEACTIVATED;
     88 }
     89 
     90 void bhv_pyramid_top_loop(void) {
     91     switch (o->oAction) {
     92         case PYRAMID_TOP_ACT_CHECK_IF_SOLVED:
     93             if (o->oPyramidTopPillarsTouched == 4) {
     94                 play_puzzle_jingle();
     95                 o->oAction = PYRAMID_TOP_ACT_SPINNING;
     96             }
     97             break;
     98 
     99         case PYRAMID_TOP_ACT_SPINNING:
    100             if (o->oTimer == 0) {
    101                 cur_obj_play_sound_2(SOUND_GENERAL2_PYRAMID_TOP_SPIN);
    102             }
    103 
    104             bhv_pyramid_top_spinning();
    105             break;
    106 
    107         case PYRAMID_TOP_ACT_EXPLODE:
    108             if (o->oTimer == 0) {
    109                 create_sound_spawner(SOUND_GENERAL2_PYRAMID_TOP_EXPLOSION);
    110             }
    111 
    112             bhv_pyramid_top_explode();
    113             break;
    114     }
    115 }
    116 
    117 /**
    118  * Initialize the pyramid fragment.
    119  */
    120 void bhv_pyramid_top_fragment_init(void) {
    121     o->oFriction = 0.999f;
    122     o->oBuoyancy = 2.0f;
    123     o->oAnimState = 3;
    124     cur_obj_scale(o->oPyramidTopFragmentsScale);
    125 }
    126 
    127 /**
    128  * Rotate the pyramid fragment along the yaw and pitch axes. After some time,
    129  * deactivate it.
    130  */
    131 void bhv_pyramid_top_fragment_loop(void) {
    132     object_step();
    133     o->oFaceAngleYaw += 0x1000;
    134     o->oFaceAnglePitch += 0x1000;
    135 
    136     if (o->oTimer == 60) {
    137         o->activeFlags = ACTIVE_FLAG_DEACTIVATED;
    138     }
    139 }
    140 
    141 /**
    142  * If Mario touches a pillar's touch detector, count it towards the pyramid
    143  * top's total count of touched detectors, and deactivate the detector.
    144  */
    145 void bhv_pyramid_pillar_touch_detector_loop(void) {
    146     cur_obj_become_tangible();
    147     if (obj_check_if_collided_with_object(o, gMarioObject) == TRUE) {
    148         // Increase the pyramid top's count of pillars touched.
    149         o->parentObj->oPyramidTopPillarsTouched++;
    150         o->activeFlags = ACTIVE_FLAG_DEACTIVATED;
    151     }
    152 }