sm64pc/src/game/behaviors/beta_trampoline.inc.c

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2019-08-25 04:46:40 +00:00
/**
* Behavior for bhvBetaTrampolineTop and bhvBetaTrampolineSpring.
* This was a trampoline that was never finished. The model and collision
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* are nearly finished, but the code was abandoned very early on
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* in its development. The trampoline consists of 3 objects: the top,
* the spring, and the base. The base is a static object with no behavior.
*/
/**
* Update function for bhvBetaTrampolineSpring.
* The spring continuously updates to be 75 units below the top.
* It then uses its displacement from its original position
* (i.e. how much the trampoline has compressed) to calculate its
* vertical scale factor, so that it compresses visually along with
* the trampoline. The devs were on the right track with the math,
* but it is incomplete.
*/
void bhv_beta_trampoline_spring_loop(void) {
f32 yScale;
f32 yDisplacement;
// Update to be 75 units under the trampoline top
copy_object_pos_and_angle(o, o->parentObj);
copy_object_graph_y_offset(o, o->parentObj);
o->oPosY -= 75.0f;
// If the trampoline top is above its original position,
// scale the spring by (the displacement)/10 + 1.
// For this to work correctly, the arbitrary value of 10
// must be replaced with 150 (the height of the trampoline).
// Note that all of the numbers in this if/else block are doubles.
if ((yDisplacement = o->oPosY - o->oHomeY) >= 0) {
yScale = yDisplacement / 10.0 + 1.0;
} else {
// Otherwise (if the trampoline is compressed),
// scale by 1 - (the displacement)/500.
// For this to work correctly, the arbitrary value of 500
// must be replaced with 150 (the height of the trampoline),
// as with the above code.
yDisplacement = -yDisplacement;
yScale = 1.0 - yDisplacement / 500.0;
}
// Scale the spring
scale_object_xyz(o, 1.0f, yScale, 1.0f);
}
/**
* Update function for bhvBetaTrampolineTop.
* This spawns the other 2 trampoline parts when initialized,
* and sets a boolean for whether Mario's on or off the trampoline.
* The trampoline top never actually moves, so the spring will never
* do anything.
*/
void bhv_beta_trampoline_top_loop(void) {
obj_set_model(MODEL_TRAMPOLINE);
// When initialized, spawn the rest of the trampoline
if (o->oTimer == 0) {
struct Object *trampolinePart;
trampolinePart = spawn_object(o, MODEL_TRAMPOLINE_CENTER, bhvBetaTrampolineSpring);
trampolinePart->oPosY -= 75.0f;
trampolinePart = spawn_object(o, MODEL_TRAMPOLINE_BASE, bhvStaticObject);
trampolinePart->oPosY -= 150.0f;
}
// Update o->oBetaTrampolineMarioOnTrampoline, and reset
// the trampoline's position if Mario's not on it.
// Since the trampoline never moves, this doesn't do anything.
// Maybe they intended to decrease the trampoline's position
// when Mario's on it in this if statement?
if (gMarioObject->platform == o) {
o->oBetaTrampolineMarioOnTrampoline = TRUE;
} else {
o->oBetaTrampolineMarioOnTrampoline = FALSE;
o->oPosY = o->oHomeY;
}
// This function is from mario_step.c, and is empty.
// It was probably intended to be used to "let the game know"
// that the trampoline is currently in use. This potential
// trampoline infrastructure is found in mario_step.c. See
// that file for more details.
nop_80254E50();
}