sm64

A Super Mario 64 decompilation
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pyramid_elevator.inc.c (2758B)

      1 
      2 /**
      3  * Behaviors for bhvPyramidElevator and bhvPyramidElevatorTrajectoryMarkerBall.
      4  *
      5  * This controls the elevator that descends Shifting Sand Land's pyramid, as
      6  * well as the small marker balls that demarcate its trajactory.
      7  */
      8 
      9 /**
     10  * Generate the ten trajectory marker balls that indicate where the elevator
     11  * moves.
     12  */
     13 void bhv_pyramid_elevator_init(void) {
     14     s32 i;
     15 
     16     for (i = 0; i < 10; i++) {
     17         struct Object *ball = spawn_object(o, MODEL_TRAJECTORY_MARKER_BALL,
     18                                            bhvPyramidElevatorTrajectoryMarkerBall);
     19         ball->oPosY = 4600 - i * 460;
     20     }
     21 }
     22 
     23 void bhv_pyramid_elevator_loop(void) {
     24     switch (o->oAction) {
     25         /**
     26          * Do not move until Mario stands on the elevator. When he does,
     27          * transition to the starting state.
     28          */
     29         case PYRAMID_ELEVATOR_ACT_IDLE:
     30             if (gMarioObject->platform == o) {
     31                 o->oAction = PYRAMID_ELEVATOR_ACT_START_MOVING;
     32             }
     33             break;
     34 
     35         /**
     36          * Use a sine wave to start the elevator's movement with a small jolt.
     37          * After a certain amount of time, transition to a constant-velocity state.
     38          */
     39         case PYRAMID_ELEVATOR_ACT_START_MOVING:
     40             o->oPosY = o->oHomeY - sins(o->oTimer * 0x1000) * 10.0f;
     41             if (o->oTimer == 8) {
     42                 o->oAction = PYRAMID_ELEVATOR_ACT_CONSTANT_VELOCITY;
     43             }
     44             break;
     45 
     46         /**
     47          * Move downwards with constant velocity. Once at the bottom of the
     48          * track, transition to the final state.
     49          */
     50         case PYRAMID_ELEVATOR_ACT_CONSTANT_VELOCITY:
     51             o->oVelY = -10.0f;
     52             o->oPosY += o->oVelY;
     53             if (o->oPosY < 128.0f) {
     54                 o->oPosY = 128.0f;
     55                 o->oAction = PYRAMID_ELEVATOR_ACT_AT_BOTTOM;
     56             }
     57             break;
     58 
     59         /**
     60          * Use a sine wave to stop the elevator's movement with a small jolt.
     61          * Then, remain at the bottom of the track.
     62          */
     63         case PYRAMID_ELEVATOR_ACT_AT_BOTTOM:
     64             o->oPosY = sins(o->oTimer * 0x1000) * 10.0f + 128.0f;
     65             if (o->oTimer >= 8) {
     66                 o->oVelY = 0;
     67                 o->oPosY = 128.0f;
     68             }
     69             break;
     70     }
     71 }
     72 
     73 /**
     74  * Deactivate the trajectory marker balls if the elevator is not moving.
     75  * Otherwise, set their scale.
     76  */
     77 void bhv_pyramid_elevator_trajectory_marker_ball_loop(void) {
     78     struct Object *elevator;
     79 
     80     cur_obj_scale(0.15f);
     81     elevator = cur_obj_nearest_object_with_behavior(bhvPyramidElevator);
     82 
     83     if (elevator != NULL) {
     84         if (elevator->oAction != PYRAMID_ELEVATOR_ACT_IDLE) {
     85             o->activeFlags = ACTIVE_FLAG_DEACTIVATED;
     86         }
     87     }
     88 }