sm64pc/src/game/behaviors/pyramid_elevator.inc.c
2020-03-01 22:42:52 -05:00

86 lines
2.6 KiB
C

/**
* Behaviors for bhvPyramidElevator and bhvPyramidElevatorTrajectoryMarkerBall.
*
* This controls the elevator that descends Shifting Sand Land's pyramid, as
* well as the small marker balls that demarcate its trajactory.
*/
/**
* Generate the ten trajectory marker balls that indicate where the elevator
* moves.
*/
void bhv_pyramid_elevator_init(void) {
s32 i;
struct Object *ball;
for (i = 0; i < 10; i++) {
ball = spawn_object(o, MODEL_TRAJECTORY_MARKER_BALL, bhvPyramidElevatorTrajectoryMarkerBall);
ball->oPosY = 4600 - i * 460;
}
}
void bhv_pyramid_elevator_loop(void) {
switch (o->oAction) {
/**
* Do not move until Mario stands on the elevator. When he does,
* transition to the starting state.
*/
case PYRAMID_ELEVATOR_IDLE:
if (gMarioObject->platform == o)
o->oAction = PYRAMID_ELEVATOR_START_MOVING;
break;
/**
* Use a sine wave to start the elevator's movement with a small jolt.
* After a certain amount of time, transition to a constant-velocity state.
*/
case PYRAMID_ELEVATOR_START_MOVING:
o->oPosY = o->oHomeY - sins(o->oTimer * 0x1000) * 10.0f;
if (o->oTimer == 8)
o->oAction = PYRAMID_ELEVATOR_CONSTANT_VELOCITY;
break;
/**
* Move downwards with constant velocity. Once at the bottom of the
* track, transition to the final state.
*/
case PYRAMID_ELEVATOR_CONSTANT_VELOCITY:
o->oVelY = -10.0f;
o->oPosY += o->oVelY;
if (o->oPosY < 128.0f) {
o->oPosY = 128.0f;
o->oAction = PYRAMID_ELEVATOR_AT_BOTTOM;
}
break;
/**
* Use a sine wave to stop the elevator's movement with a small jolt.
* Then, remain at the bottom of the track.
*/
case PYRAMID_ELEVATOR_AT_BOTTOM:
o->oPosY = sins(o->oTimer * 0x1000) * 10.0f + 128.0f;
if (o->oTimer >= 8) {
o->oVelY = 0;
o->oPosY = 128.0f;
}
break;
}
}
/**
* Deactivate the trajectory marker balls if the elevator is not moving.
* Otherwise, set their scale.
*/
void bhv_pyramid_elevator_trajectory_marker_ball_loop(void) {
struct Object *elevator;
cur_obj_scale(0.15f);
elevator = cur_obj_nearest_object_with_behavior(bhvPyramidElevator);
if (elevator != NULL) {
if (elevator->oAction != PYRAMID_ELEVATOR_IDLE) {
o->activeFlags = 0;
}
}
}