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c45aa301bb
sm64pc/src/game/behaviors/chain_chomp.inc.c
n64 c45aa301bb Refresh 8
2020-04-03 14:57:26 -04:00

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/**
* Behavior for bhvChainChomp, bhvChainChompChainPart, bhvWoodenPost, and bhvChainChompGate.
* bhvChainChomp spawns its bhvWoodenPost in its behavior script. It spawns 5 chain
* parts. Part 0 is the "pivot", which is positioned at the wooden post while
* the chomp is chained up. Parts 1-4 are the other parts, starting from the
* chain chomp and moving toward the pivot.
* Processing order is bhvWoodenPost, bhvChainChompGate, bhvChainChomp, bhvChainChompChainPart.
* The chain parts are processed starting at the post and ending at the chomp.
*/
/**
* Hitbox for chain chomp.
*/
static struct ObjectHitbox sChainChompHitbox = {
/* interactType: */ INTERACT_MR_BLIZZARD,
/* downOffset: */ 0,
/* damageOrCoinValue: */ 3,
/* health: */ 1,
/* numLootCoins: */ 0,
/* radius: */ 80,
/* height: */ 160,
/* hurtboxRadius: */ 80,
/* hurtboxHeight: */ 160,
};
/**
* Update function for chain chomp part / pivot.
*/
void bhv_chain_chomp_chain_part_update(void) {
struct ChainSegment *segment;
if (o->parentObj->oAction == CHAIN_CHOMP_ACT_UNLOAD_CHAIN) {
obj_mark_for_deletion(o);
} else if (o->oBehParams2ndByte != CHAIN_CHOMP_CHAIN_PART_BP_PIVOT) {
segment = &o->parentObj->oChainChompSegments[o->oBehParams2ndByte];
// Set position relative to the pivot
o->oPosX = o->parentObj->parentObj->oPosX + segment->posX;
o->oPosY = o->parentObj->parentObj->oPosY + segment->posY;
o->oPosZ = o->parentObj->parentObj->oPosZ + segment->posZ;
;
} else if (o->parentObj->oChainChompReleaseStatus != CHAIN_CHOMP_NOT_RELEASED) {
cur_obj_update_floor_and_walls();
cur_obj_move_standard(78);
}
}
/**
* When mario gets close enough, allocate chain segments and spawn their objects.
*/
static void chain_chomp_act_uninitialized(void) {
struct ChainSegment *segments;
s32 i;
if (o->oDistanceToMario < 3000.0f) {
segments = mem_pool_alloc(gObjectMemoryPool, 5 * sizeof(struct ChainSegment));
if (segments != NULL) {
// Each segment represents the offset of a chain part to the pivot.
// Segment 0 connects the pivot to the chain chomp itself. Segment
// 1 connects the pivot to the chain part next to the chain chomp
// (chain part 1), etc.
o->oChainChompSegments = segments;
for (i = 0; i <= 4; i++) {
chain_segment_init(&segments[i]);
}
cur_obj_set_pos_to_home();
// Spawn the pivot and set to parent
if ((o->parentObj =
spawn_object(o, CHAIN_CHOMP_CHAIN_PART_BP_PIVOT, bhvChainChompChainPart))
!= NULL) {
// Spawn the non-pivot chain parts, starting from the chain
// chomp and moving toward the pivot
for (i = 1; i <= 4; i++) {
spawn_object_relative(i, 0, 0, 0, o, MODEL_METALLIC_BALL, bhvChainChompChainPart);
}
o->oAction = CHAIN_CHOMP_ACT_MOVE;
cur_obj_unhide();
}
}
}
}
/**
* Apply gravity to each chain part, and cap its distance to the previous
* part as well as from the pivot.
*/
static void chain_chomp_update_chain_segments(void) {
struct ChainSegment *prevSegment;
struct ChainSegment *segment;
f32 offsetX;
f32 offsetY;
f32 offsetZ;
f32 offset;
f32 segmentVelY;
f32 maxTotalOffset;
s32 i;
if (o->oVelY < 0.0f) {
segmentVelY = o->oVelY;
} else {
segmentVelY = -20.0f;
}
// Segment 0 connects the pivot to the chain chomp itself, and segment i>0
// connects the pivot to chain part i (1 is closest to the chain chomp).
for (i = 1; i <= 4; i++) {
prevSegment = &o->oChainChompSegments[i - 1];
segment = &o->oChainChompSegments[i];
// Apply gravity
if ((segment->posY += segmentVelY) < 0.0f) {
segment->posY = 0.0f;
}
// Cap distance to previous chain part (so that the tail follows the
// chomp)
offsetX = segment->posX - prevSegment->posX;
offsetY = segment->posY - prevSegment->posY;
offsetZ = segment->posZ - prevSegment->posZ;
offset = sqrtf(offsetX * offsetX + offsetY * offsetY + offsetZ * offsetZ);
if (offset > o->oChainChompMaxDistBetweenChainParts) {
offset = o->oChainChompMaxDistBetweenChainParts / offset;
offsetX *= offset;
offsetY *= offset;
offsetZ *= offset;
}
// Cap distance to pivot (so that it stretches when the chomp moves far
// from the wooden post)
offsetX += prevSegment->posX;
offsetY += prevSegment->posY;
offsetZ += prevSegment->posZ;
offset = sqrtf(offsetX * offsetX + offsetY * offsetY + offsetZ * offsetZ);
maxTotalOffset = o->oChainChompMaxDistFromPivotPerChainPart * (5 - i);
if (offset > maxTotalOffset) {
offset = maxTotalOffset / offset;
offsetX *= offset;
offsetY *= offset;
offsetZ *= offset;
}
segment->posX = offsetX;
segment->posY = offsetY;
segment->posZ = offsetZ;
}
}
/**
* Lunging increases the maximum distance from the pivot and changes the maximum
* distance between chain parts. Restore these values to normal.
*/
static void chain_chomp_restore_normal_chain_lengths(void) {
approach_f32_ptr(&o->oChainChompMaxDistFromPivotPerChainPart, 750.0f / 5, 4.0f);
o->oChainChompMaxDistBetweenChainParts = o->oChainChompMaxDistFromPivotPerChainPart;
}
/**
* Turn toward mario. Wait a bit and then enter the lunging sub-action.
*/
static void chain_chomp_sub_act_turn(void) {
o->oGravity = -4.0f;
chain_chomp_restore_normal_chain_lengths();
obj_move_pitch_approach(0, 0x100);
if (o->oMoveFlags & OBJ_MOVE_MASK_ON_GROUND) {
cur_obj_rotate_yaw_toward(o->oAngleToMario, 0x400);
if (abs_angle_diff(o->oAngleToMario, o->oMoveAngleYaw) < 0x800) {
if (o->oTimer > 30) {
if (cur_obj_check_anim_frame(0)) {
cur_obj_reverse_animation();
if (o->oTimer > 40) {
// Increase the maximum distance from the pivot and enter
// the lunging sub-action.
cur_obj_play_sound_2(SOUND_GENERAL_CHAIN_CHOMP2);
o->oSubAction = CHAIN_CHOMP_SUB_ACT_LUNGE;
o->oChainChompMaxDistFromPivotPerChainPart = 900.0f / 5;
o->oForwardVel = 140.0f;
o->oVelY = 20.0f;
o->oGravity = 0.0f;
o->oChainChompTargetPitch = obj_get_pitch_from_vel();
}
} else {
o->oTimer -= 1;
}
} else {
o->oForwardVel = 0.0f;
}
} else {
cur_obj_play_sound_2(SOUND_GENERAL_CHAIN_CHOMP1);
o->oForwardVel = 10.0f;
o->oVelY = 20.0f;
}
} else {
cur_obj_rotate_yaw_toward(o->oAngleToMario, 0x190);
o->oTimer = 0;
}
}
static void chain_chomp_sub_act_lunge(void) {
f32 val04;
obj_face_pitch_approach(o->oChainChompTargetPitch, 0x400);
if (o->oForwardVel != 0.0f) {
if (o->oChainChompRestrictedByChain == TRUE) {
o->oForwardVel = o->oVelY = 0.0f;
o->oChainChompUnk104 = 30.0f;
}
// TODO: What is this
if ((val04 = 900.0f - o->oChainChompDistToPivot) > 220.0f) {
val04 = 220.0f;
}
o->oChainChompMaxDistBetweenChainParts =
val04 / 220.0f * o->oChainChompMaxDistFromPivotPerChainPart;
o->oTimer = 0;
;
} else {
// Turn toward pivot
cur_obj_rotate_yaw_toward(atan2s(o->oChainChompSegments[0].posZ, o->oChainChompSegments[0].posX),
0x1000);
if (o->oChainChompUnk104 != 0.0f) {
approach_f32_ptr(&o->oChainChompUnk104, 0.0f, 0.8f);
} else {
o->oSubAction = CHAIN_CHOMP_SUB_ACT_TURN;
}
o->oChainChompMaxDistBetweenChainParts = o->oChainChompUnk104;
if (gGlobalTimer % 2 != 0) {
o->oChainChompMaxDistBetweenChainParts = -o->oChainChompUnk104;
}
}
if (o->oTimer < 30) {
cur_obj_reverse_animation();
}
}
/**
* Fall to the ground and interrupt mario into a cutscene action.
*/
static void chain_chomp_released_trigger_cutscene(void) {
o->oForwardVel = 0.0f;
o->oGravity = -4.0f;
//! Can delay this if we get into a cutscene-unfriendly action after the
// last post ground pound and before this
if (set_mario_npc_dialog(2) == 2 && (o->oMoveFlags & OBJ_MOVE_MASK_ON_GROUND)
&& cutscene_object(CUTSCENE_STAR_SPAWN, o) == 1) {
o->oChainChompReleaseStatus = CHAIN_CHOMP_RELEASED_LUNGE_AROUND;
o->oTimer = 0;
}
}
/**
* Lunge 4 times, each time moving toward mario +/- 0x2000 angular units.
* Finally, begin a lunge toward x=1450, z=562 (near the gate).
*/
static void chain_chomp_released_lunge_around(void) {
chain_chomp_restore_normal_chain_lengths();
// Finish bounce
if (o->oMoveFlags & OBJ_MOVE_MASK_ON_GROUND) {
// Before first bounce, turn toward mario and wait 2 seconds
if (o->oChainChompNumLunges == 0) {
if (cur_obj_rotate_yaw_toward(o->oAngleToMario, 0x320)) {
if (o->oTimer > 60) {
o->oChainChompNumLunges += 1;
// enable wall collision
o->oWallHitboxRadius = 200.0f;
}
} else {
o->oTimer = 0;
}
} else {
if (++o->oChainChompNumLunges <= 5) {
cur_obj_play_sound_2(SOUND_GENERAL_CHAIN_CHOMP1);
o->oMoveAngleYaw = o->oAngleToMario + random_sign() * 0x2000;
o->oForwardVel = 30.0f;
o->oVelY = 50.0f;
} else {
o->oChainChompReleaseStatus = CHAIN_CHOMP_RELEASED_BREAK_GATE;
o->oHomeX = 1450.0f;
o->oHomeZ = 562.0f;
o->oMoveAngleYaw = cur_obj_angle_to_home();
o->oForwardVel = cur_obj_lateral_dist_to_home() / 8;
o->oVelY = 50.0f;
}
}
}
}
/**
* Continue lunging until a wall collision occurs. Mark the gate as destroyed,
* wait for the chain chomp to land, and then begin a jump toward the final
* target, x=3288, z=-1770.
*/
static void chain_chomp_released_break_gate(void) {
if (!o->oChainChompHitGate) {
// If hit wall, assume it's the gate and bounce off of it
//! The wall may not be the gate
//! If the chain chomp gets stuck, it may never hit a wall, resulting
// in a softlock
if (o->oMoveFlags & OBJ_MOVE_HIT_WALL) {
o->oChainChompHitGate = TRUE;
o->oMoveAngleYaw = cur_obj_reflect_move_angle_off_wall();
o->oForwardVel *= 0.4f;
}
} else if (o->oMoveFlags & OBJ_MOVE_MASK_ON_GROUND) {
o->oChainChompReleaseStatus = CHAIN_CHOMP_RELEASED_JUMP_AWAY;
o->oHomeX = 3288.0f;
o->oHomeZ = -1770.0f;
o->oMoveAngleYaw = cur_obj_angle_to_home();
o->oForwardVel = cur_obj_lateral_dist_to_home() / 50.0f;
o->oVelY = 120.0f;
}
}
/**
* Wait until the chain chomp lands.
*/
static void chain_chomp_released_jump_away(void) {
if (o->oMoveFlags & OBJ_MOVE_MASK_ON_GROUND) {
gObjCutsceneDone = TRUE;
o->oChainChompReleaseStatus = CHAIN_CHOMP_RELEASED_END_CUTSCENE;
}
}
/**
* Release mario and transition to the unload chain action.
*/
static void chain_chomp_released_end_cutscene(void) {
if (cutscene_object(CUTSCENE_STAR_SPAWN, o) == -1) {
set_mario_npc_dialog(0);
o->oAction = CHAIN_CHOMP_ACT_UNLOAD_CHAIN;
}
}
/**
* All chain chomp movement behavior, including the cutscene after being
* released.
*/
static void chain_chomp_act_move(void) {
f32 maxDistToPivot;
// Unload chain if mario is far enough
if (o->oChainChompReleaseStatus == CHAIN_CHOMP_NOT_RELEASED && o->oDistanceToMario > 4000.0f) {
o->oAction = CHAIN_CHOMP_ACT_UNLOAD_CHAIN;
o->oForwardVel = o->oVelY = 0.0f;
} else {
cur_obj_update_floor_and_walls();
switch (o->oChainChompReleaseStatus) {
case CHAIN_CHOMP_NOT_RELEASED:
switch (o->oSubAction) {
case CHAIN_CHOMP_SUB_ACT_TURN:
chain_chomp_sub_act_turn();
break;
case CHAIN_CHOMP_SUB_ACT_LUNGE:
chain_chomp_sub_act_lunge();
break;
}
break;
case CHAIN_CHOMP_RELEASED_TRIGGER_CUTSCENE:
chain_chomp_released_trigger_cutscene();
break;
case CHAIN_CHOMP_RELEASED_LUNGE_AROUND:
chain_chomp_released_lunge_around();
break;
case CHAIN_CHOMP_RELEASED_BREAK_GATE:
chain_chomp_released_break_gate();
break;
case CHAIN_CHOMP_RELEASED_JUMP_AWAY:
chain_chomp_released_jump_away();
break;
case CHAIN_CHOMP_RELEASED_END_CUTSCENE:
chain_chomp_released_end_cutscene();
break;
}
cur_obj_move_standard(78);
// Segment 0 connects the pivot to the chain chomp itself
o->oChainChompSegments[0].posX = o->oPosX - o->parentObj->oPosX;
o->oChainChompSegments[0].posY = o->oPosY - o->parentObj->oPosY;
o->oChainChompSegments[0].posZ = o->oPosZ - o->parentObj->oPosZ;
o->oChainChompDistToPivot =
sqrtf(o->oChainChompSegments[0].posX * o->oChainChompSegments[0].posX
+ o->oChainChompSegments[0].posY * o->oChainChompSegments[0].posY
+ o->oChainChompSegments[0].posZ * o->oChainChompSegments[0].posZ);
// If the chain is fully stretched
maxDistToPivot = o->oChainChompMaxDistFromPivotPerChainPart * 5;
if (o->oChainChompDistToPivot > maxDistToPivot) {
f32 ratio = maxDistToPivot / o->oChainChompDistToPivot;
o->oChainChompDistToPivot = maxDistToPivot;
o->oChainChompSegments[0].posX *= ratio;
o->oChainChompSegments[0].posY *= ratio;
o->oChainChompSegments[0].posZ *= ratio;
if (o->oChainChompReleaseStatus == CHAIN_CHOMP_NOT_RELEASED) {
// Restrict chain chomp position
o->oPosX = o->parentObj->oPosX + o->oChainChompSegments[0].posX;
o->oPosY = o->parentObj->oPosY + o->oChainChompSegments[0].posY;
o->oPosZ = o->parentObj->oPosZ + o->oChainChompSegments[0].posZ;
o->oChainChompRestrictedByChain = TRUE;
} else {
// Move pivot like the chain chomp is pulling it along
f32 oldPivotY = o->parentObj->oPosY;
o->parentObj->oPosX = o->oPosX - o->oChainChompSegments[0].posX;
o->parentObj->oPosY = o->oPosY - o->oChainChompSegments[0].posY;
o->parentObj->oVelY = o->parentObj->oPosY - oldPivotY;
o->parentObj->oPosZ = o->oPosZ - o->oChainChompSegments[0].posZ;
}
} else {
o->oChainChompRestrictedByChain = FALSE;
}
chain_chomp_update_chain_segments();
// Begin a lunge if mario tries to attack
if (obj_check_attacks(&sChainChompHitbox, o->oAction)) {
o->oSubAction = CHAIN_CHOMP_SUB_ACT_LUNGE;
o->oChainChompMaxDistFromPivotPerChainPart = 900.0f / 5;
o->oForwardVel = 0.0f;
o->oVelY = 300.0f;
o->oGravity = -4.0f;
o->oChainChompTargetPitch = -0x3000;
}
}
}
/**
* Hide and free the chain chomp segments. The chain objects will unload
* themselves when they see that the chain chomp is in this action.
*/
static void chain_chomp_act_unload_chain(void) {
cur_obj_hide();
mem_pool_free(gObjectMemoryPool, o->oChainChompSegments);
o->oAction = CHAIN_CHOMP_ACT_UNINITIALIZED;
if (o->oChainChompReleaseStatus != CHAIN_CHOMP_NOT_RELEASED) {
obj_mark_for_deletion(o);
}
}
/**
* Update function for chain chomp.
*/
void bhv_chain_chomp_update(void) {
switch (o->oAction) {
case CHAIN_CHOMP_ACT_UNINITIALIZED:
chain_chomp_act_uninitialized();
break;
case CHAIN_CHOMP_ACT_MOVE:
chain_chomp_act_move();
break;
case CHAIN_CHOMP_ACT_UNLOAD_CHAIN:
chain_chomp_act_unload_chain();
break;
}
}
/**
* Update function for wooden post.
*/
void bhv_wooden_post_update(void) {
// When ground pounded by mario, drop by -45 + -20
if (!o->oWoodenPostMarioPounding) {
if ((o->oWoodenPostMarioPounding = cur_obj_is_mario_ground_pounding_platform())) {
cur_obj_play_sound_2(SOUND_GENERAL_POUND_WOOD_POST);
o->oWoodenPostSpeedY = -70.0f;
}
} else if (approach_f32_ptr(&o->oWoodenPostSpeedY, 0.0f, 25.0f)) {
// Stay still until mario is done ground pounding
o->oWoodenPostMarioPounding = cur_obj_is_mario_ground_pounding_platform();
} else if ((o->oWoodenPostOffsetY += o->oWoodenPostSpeedY) < -190.0f) {
// Once pounded, if this is the chain chomp's post, release the chain
// chomp
o->oWoodenPostOffsetY = -190.0f;
if (o->parentObj != o) {
play_puzzle_jingle();
o->parentObj->oChainChompReleaseStatus = CHAIN_CHOMP_RELEASED_TRIGGER_CUTSCENE;
o->parentObj = o;
}
}
if (o->oWoodenPostOffsetY != 0.0f) {
o->oPosY = o->oHomeY + o->oWoodenPostOffsetY;
} else if (!(o->oBehParams & WOODEN_POST_BP_NO_COINS_MASK)) {
// Reset the timer once mario is far enough
if (o->oDistanceToMario > 400.0f) {
o->oTimer = o->oWoodenPostTotalMarioAngle = 0;
} else {
// When mario runs around the post 3 times within 200 frames, spawn
// coins
o->oWoodenPostTotalMarioAngle += (s16)(o->oAngleToMario - o->oWoodenPostPrevAngleToMario);
if (absi(o->oWoodenPostTotalMarioAngle) > 0x30000 && o->oTimer < 200) {
obj_spawn_loot_yellow_coins(o, 5, 20.0f);
set_object_respawn_info_bits(o, 1);
}
}
o->oWoodenPostPrevAngleToMario = o->oAngleToMario;
}
}
/**
* Init function for chain chomp gate.
*/
void bhv_chain_chomp_gate_init(void) {
o->parentObj = cur_obj_nearest_object_with_behavior(bhvChainChomp);
}
/**
* Update function for chain chomp gate
*/
void bhv_chain_chomp_gate_update(void) {
if (o->parentObj->oChainChompHitGate) {
spawn_mist_particles_with_sound(SOUND_GENERAL_WALL_EXPLOSION);
set_camera_shake_from_point(SHAKE_POS_SMALL, o->oPosX, o->oPosY, o->oPosZ);
spawn_mist_particles_variable(0, 0x7F, 200.0f);
spawn_triangle_break_particles(30, 0x8A, 3.0f, 4);
obj_mark_for_deletion(o);
}
}
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