blues/p2/monsters.c

358 lines
8.2 KiB
C

#include "game.h"
#include "resource.h"
#include "util.h"
static void monster_func1_helper(struct object_t *obj, int16_t x_pos, int16_t y_pos) {
struct level_monster_t *m = obj->data.m.ref;
if (obj->data.m.unkE == 0xFF) {
return;
}
if (obj->spr_num & 0x2000) {
return;
}
const int dx = abs(x_pos - g_vars.objects_tbl[1].x_pos);
if (dx <= 320) {
const int dy = abs(y_pos - g_vars.objects_tbl[1].y_pos);
if (dy <= 300) {
return;
}
}
if (obj->data.m.unkE < 10) {
obj->spr_num = 0xFFFF;
m->flags &= ~4;
m->current_tick = 0;
} else {
m->current_tick = 0;
obj->spr_num = 0xFFFF;
m->flags &= ~4;
if ((m->flags & 2) == 0) {
m->spr_num = 0xFFFF;
}
}
}
static bool monster_next_tick(struct level_monster_t *m) {
if (m->current_tick < 255) {
++m->current_tick;
}
return ((m->current_tick >> 2) < m->total_ticks);
}
static void monster_change_next_anim(struct object_t *obj) {
const uint8_t *p = obj->data.m.anim;
while ((int16_t)READ_LE_UINT16(p) >= 0) {
p += 2;
}
obj->data.m.anim = p + 2;
}
static void monster_change_prev_anim(struct object_t *obj) {
const uint8_t *p = obj->data.m.anim;
do {
p -= 2;
} while ((int16_t)READ_LE_UINT16(p) >= 0);
obj->data.m.anim = p;
}
static struct rotation_t *find_rotation() {
for (int i = 0; i < 20; ++i) {
struct rotation_t *r = &g_vars.rotation_tbl[i];
if (r->x_pos == 0xFFFF) {
return r;
}
}
return 0;
}
static void monster_rotate_pos(struct level_monster_t *m, int index, int step) {
step >>= 2;
uint8_t radius = step;
for (int i = 0; i < 3; ++i) {
struct rotation_t *r = find_rotation();
if (r) {
r->x_pos = m->x_pos;
r->y_pos = m->y_pos - 24;
r->radius = radius;
r->index_tbl = index;
radius += step;
}
}
}
static void monster_update_y_velocity(struct object_t *obj, struct level_monster_t *m) {
if ((m->flags & 1) != 0 && ((obj->spr_num & 0x2000) != 0 || g_vars.objects_tbl[1].y_pos >= obj->y_pos)) {
if (obj->data.m.y_velocity < 240) {
obj->data.m.y_velocity += 15;
}
} else {
m->current_tick = 0;
obj->spr_num = 0xFFFF;
m->flags &= ~4;
if ((m->flags & 2) == 0) {
m->spr_num = 0xFFFF;
}
}
}
static void monster_func1_type2(struct object_t *obj) {
monster_func1_helper(obj, obj->x_pos, obj->y_pos);
struct level_monster_t *m = obj->data.m.ref;
uint8_t al = obj->data.m.unkE;
if (al < 2) {
monster_rotate_pos(m, 0, obj->y_pos - m->y_pos);
if (al == 0) {
obj->data.m.y_velocity = m->type2.unkE << 4;
const int dy = obj->y_pos - m->y_pos;
if (m->type2.y_range >= dy) {
return;
}
obj->data.m.unkE = 1;
monster_change_next_anim(obj);
} else if (al == 1) {
obj->data.m.y_velocity = m->type2.unkE << 4;
const int dy = obj->y_pos - m->y_pos;
if (dy >= 0) {
return;
}
obj->data.m.unkE = 0;
monster_change_prev_anim(obj);
}
} else if (al == 0xFF) {
monster_update_y_velocity(obj, m);
}
}
static void monster_func1_type8(struct object_t *obj) {
monster_func1_helper(obj, obj->x_pos, obj->y_pos);
struct level_monster_t *m = obj->data.m.ref;
if (obj->data.m.x_velocity != 0) {
const int dx = (obj->x_pos <= g_vars.objects_tbl[1].x_pos) ? 1 : -1;
obj->data.m.x_velocity = dx;
}
uint8_t al = obj->data.m.unkE;
if ((al == 0 && !monster_next_tick(m)) || (al == 12 && !monster_next_tick(m))) {
const int dx = abs(g_vars.objects_tbl[1].x_pos - obj->x_pos);
if (m->type8.x_range < (dx >> 4)) {
return;
}
const int dy = abs(g_vars.objects_tbl[1].y_pos - obj->y_pos);
if (m->type8.y_range < (dy >> 4)) {
return;
}
obj->data.m.y_velocity = -(m->type8.unkE << 4);
int x_vel = m->type8.unkF << 4;
if (g_vars.objects_tbl[1].x_pos <= obj->x_pos) {
x_vel = -x_vel;
}
obj->data.m.x_velocity = x_vel;
obj->data.m.unkE = 10;
m->flags = (m->flags & ~0x2C) | 0x2C;
monster_change_next_anim(obj);
} else if (al == 10) {
if (obj->data.m.y_velocity < 0) {
return;
}
obj->data.m.unkE = 11;
monster_change_next_anim(obj);
} else if (al == 11) {
if (obj->data.m.y_velocity > 0) {
return;
}
obj->data.m.unkE = 12;
monster_change_prev_anim(obj);
monster_change_prev_anim(obj);
obj->data.m.x_velocity = 0;
m->current_tick = 0;
} else if (al == 0xFF) {
monster_update_y_velocity(obj, m);
}
}
static void monster_func1_type9(struct object_t *obj) {
struct level_monster_t *m = obj->data.m.ref;
if ((obj->spr_num & 0x2000) == 0 && obj->data.m.unkE != 0xFF) {
} else {
uint8_t al = obj->data.m.unkE;
if (al == 0) {
} else if (al == 1) {
} else if (al == 0xFF) {
monster_update_y_velocity(obj, m);
}
}
}
void monster_func1(int type, struct object_t *obj) {
switch (type) {
case 1:
monster_func1_helper(obj, obj->x_pos, obj->y_pos);
break;
case 2:
monster_func1_type2(obj);
break;
case 8:
monster_func1_type8(obj);
break;
case 9:
monster_func1_type9(obj);
break;
default:
print_warning("monster_func1 unhandled monster type %d", type);
break;
}
}
static struct object_t *find_object_monster() {
for (int i = 0; i < 12; ++i) {
struct object_t *obj = &g_vars.objects_tbl[11 + i];
if (obj->spr_num == 0xFFFF) {
return obj;
}
}
return 0;
}
static bool monster_init_object(struct level_monster_t *m) {
struct object_t *obj = find_object_monster();
if (obj) {
obj->data.m.unk10 = 0;
g_vars.monster.current_object = obj;
obj->x_pos = m->x_pos;
obj->y_pos = m->y_pos;
obj->spr_num = m->spr_num;
obj->data.m.ref = m;
m->flags = 0x17;
obj->data.m.x_velocity = 0;
obj->data.m.y_velocity = 0;
obj->data.m.unkE = 0;
obj->data.m.unkF = m->unk5;
return true;
}
return false;
}
static bool monster_is_visible(int x_pos, int y_pos) {
const int dx = (x_pos >> 4) - g_vars.tilemap_x;
if (dx < -2 || dx > (TILEMAP_SCREEN_W + 2)) {
return false;
}
const int dy = (y_pos >> 4) - g_vars.tilemap_y;
if (dy < -2 || dy > (TILEMAP_SCREEN_H + 2)) {
return false;
}
return true;
}
static bool monster_func2_type1(struct level_monster_t *m) {
const int16_t x_pos = m->x_pos;
const int16_t y_pos = m->y_pos;
if (!monster_is_visible(x_pos, y_pos)) {
return false;
}
return monster_init_object(m);
}
static bool monster_func2_type2(struct level_monster_t *m) {
const int16_t x_pos = m->x_pos;
const int16_t y_pos = m->y_pos;
if (!monster_is_visible(x_pos, y_pos)) {
return false;
}
struct object_t *obj = find_object_monster();
if (obj) {
obj->data.m.unk10 = 0;
g_vars.monster.current_object = obj;
obj->x_pos = x_pos;
obj->y_pos = y_pos;
obj->spr_num = m->spr_num;
obj->data.m.ref = m;
m->flags = 5;
obj->data.m.y_velocity = 0;
obj->data.m.x_velocity = 0;
obj->data.m.unkE = 0;
obj->data.m.unkF = m->unk5;
return true;
}
return false;
}
static bool monster_func2_type4(struct level_monster_t *m) {
if (!monster_func2_type1(m)) {
return false;
}
m->flags = 5;
return true;
}
static bool monster_func2_type5_6_7_8(struct level_monster_t *m) {
if (!monster_func2_type1(m)) {
return false;
}
m->flags = 5;
return true;
}
static bool monster_func2_type9(struct level_monster_t *m) {
uint8_t flags = m->flags;
if (!monster_func2_type1(m)) {
return false;
}
flags |= 5;
if (g_vars.level_num == 6) {
flags |= 0x80;
}
m->flags = flags;
return true;
}
static bool monster_func2_type10(struct level_monster_t *m) {
if (g_vars.level_num == 5 && g_vars.shake_screen_counter != 0) {
return false;
}
if (m->current_tick < 255) {
++m->current_tick;
}
if (m->total_ticks > (m->current_tick >> 2)) {
return false;
}
return true;
}
static bool monster_func2_type11(struct level_monster_t *m) {
if (m->current_tick < 255) {
++m->current_tick;
}
if (m->total_ticks > (m->current_tick >> 2) || !monster_func2_type1(m)) {
return false;
}
m->flags = 0x37;
g_vars.monster.current_object->y_pos -= (random_get_number() & 0x3F);
return true;
}
bool monster_func2(int type, struct level_monster_t *m) {
switch (type) {
case 1:
return monster_func2_type1(m);
case 2:
return monster_func2_type2(m);
case 4:
return monster_func2_type4(m);
case 5:
case 6:
case 7:
case 8:
return monster_func2_type5_6_7_8(m);
case 9:
return monster_func2_type9(m);
case 10:
return monster_func2_type10(m);
case 11:
return monster_func2_type11(m);
default:
print_warning("monster_func2 unhandled monster type %d", type);
break;
}
return false;
}