sm64

A Super Mario 64 decompilation
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ttc_treadmill.inc.c (2379B)

      1 
      2 /**
      3  * Behavior for bhvTTCTreadmill.
      4  * The first treadmill in processing order is the "master treadmill". It is
      5  * responsible for playing sounds and calling RNG to control all the other
      6  * treadmills.
      7  */
      8 
      9 /**
     10  * Collision models for the different sized treadmills.
     11  */
     12 static Collision const *sTTCTreadmillCollisionModels[] = {
     13     ttc_seg7_collision_070152B4,
     14     ttc_seg7_collision_070153E0,
     15 };
     16 
     17 static s16 sTTCTreadmillSpeeds[] = {
     18     /* TTC_SPEED_SLOW    */ 50,
     19     /* TTC_SPEED_FAST    */ 100,
     20     /* TTC_SPEED_RANDOM  */ 0,
     21     /* TTC_SPEED_STOPPED */ 0,
     22 };
     23 
     24 extern s16 ttc_movtex_tris_big_surface_treadmill[];
     25 extern s16 ttc_movtex_tris_small_surface_treadmill[];
     26 
     27 void bhv_ttc_treadmill_init(void) {
     28     o->collisionData = segmented_to_virtual(
     29         sTTCTreadmillCollisionModels[o->oBhvParams2ndByte & TTC_TREADMILL_BP_FLAG_MASK]);
     30 
     31     o->oTTCTreadmillBigSurface = segmented_to_virtual(ttc_movtex_tris_big_surface_treadmill);
     32     o->oTTCTreadmillSmallSurface = segmented_to_virtual(ttc_movtex_tris_small_surface_treadmill);
     33 
     34     *o->oTTCTreadmillBigSurface = *o->oTTCTreadmillSmallSurface = sTTCTreadmillSpeeds[gTTCSpeedSetting];
     35 
     36     sMasterTreadmill = NULL;
     37 }
     38 
     39 /**
     40  * Update function for bhvTTCTreadmill. It calls cur_obj_compute_vel_xz afterward.
     41  */
     42 void bhv_ttc_treadmill_update(void) {
     43     if (sMasterTreadmill == o || sMasterTreadmill == NULL) {
     44         sMasterTreadmill = o;
     45 
     46         cur_obj_play_sound_1(SOUND_ENV_ELEVATOR2);
     47 
     48         if (gTTCSpeedSetting == TTC_SPEED_RANDOM) {
     49             // Stay still for 5 frames, then accelerate toward the target speed
     50             // until it's time to switch
     51             if (o->oTimer > o->oTTCTreadmillTimeUntilSwitch) {
     52                 // Then stop and select new target speed and time until switch
     53                 if (approach_f32_ptr(&o->oTTCTreadmillSpeed, 0.0f, 10.0f)) {
     54                     o->oTTCTreadmillTimeUntilSwitch = random_mod_offset(10, 20, 7);
     55                     o->oTTCTreadmillTargetSpeed = random_sign() * 50.0f;
     56                     o->oTimer = 0;
     57                 }
     58             } else if (o->oTimer > 5) {
     59                 approach_f32_ptr(&o->oTTCTreadmillSpeed, o->oTTCTreadmillTargetSpeed, 10.0f);
     60             }
     61 
     62             *o->oTTCTreadmillBigSurface = *o->oTTCTreadmillSmallSurface = o->oTTCTreadmillSpeed;
     63         }
     64     }
     65 
     66     o->oForwardVel = 0.084f * *o->oTTCTreadmillBigSurface;
     67 }