712 lines
18 KiB
C
712 lines
18 KiB
C
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/* monsters logic */
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#include "game.h"
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#include "resource.h"
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#include "util.h"
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static void monster_reset(struct object_t *obj, struct level_monster_t *m) {
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m->current_tick = 0;
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obj->spr_num = 0xFFFF;
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m->flags &= ~4;
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if ((m->flags & 2) == 0) {
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m->spr_num = 0xFFFF;
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}
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}
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static void monster_func1_helper(struct object_t *obj, int16_t x_pos, int16_t y_pos) {
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struct level_monster_t *m = obj->data.m.ref;
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if (obj->data.m.state == 0xFF) {
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return;
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}
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if (obj->spr_num & 0x2000) {
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return;
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}
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const int dx = abs(x_pos - g_vars.objects_tbl[1].x_pos);
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if (dx <= TILEMAP_SCREEN_W) {
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const int dy = abs(y_pos - g_vars.objects_tbl[1].y_pos);
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if (dy <= TILEMAP_SCREEN_H + (300 - 176)) {
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return;
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}
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}
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if (obj->data.m.state < 10) {
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obj->spr_num = 0xFFFF;
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m->flags &= ~4;
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m->current_tick = 0;
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} else {
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monster_reset(obj, m);
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}
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}
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static bool monster_next_tick(struct level_monster_t *m) {
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if (m->current_tick < UCHAR_MAX) {
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++m->current_tick;
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}
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return ((m->current_tick >> 2) < m->respawn_ticks);
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}
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void monster_change_next_anim(struct object_t *obj) {
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const uint8_t *p = obj->data.m.anim;
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while ((int16_t)READ_LE_UINT16(p) >= 0) {
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p += 2;
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}
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obj->data.m.anim = p + 2;
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}
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void monster_change_prev_anim(struct object_t *obj) {
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const uint8_t *p = obj->data.m.anim;
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do {
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p -= 2;
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} while ((int16_t)READ_LE_UINT16(p) >= 0);
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obj->data.m.anim = p;
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}
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static struct rotation_t *find_rotation() {
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for (int i = 0; i < 20; ++i) {
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struct rotation_t *r = &g_vars.rotation_tbl[i];
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if (r->x_pos == 0xFFFF) {
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return r;
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}
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}
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return 0;
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}
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static void monster_rotate_tiles(struct level_monster_t *m, int index, int step) {
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step >>= 2;
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uint8_t radius = step;
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for (int i = 0; i < 3; ++i) {
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struct rotation_t *r = find_rotation();
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if (r) {
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r->x_pos = m->x_pos;
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r->y_pos = m->y_pos - 24;
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r->radius = radius;
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r->index_tbl = index;
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radius += step;
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}
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}
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}
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static void monster_rotate_pos(struct object_t *obj, struct level_monster_t *m) {
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obj->x_pos = m->x_pos + ((m->type4.radius * (((int8_t)cos_tbl[m->type4.angle]) >> 2)) >> 4);
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obj->y_pos = m->y_pos + ((m->type4.radius * (((int8_t)sin_tbl[m->type4.angle]) >> 2)) >> 4);
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monster_rotate_tiles(m, m->type4.angle, m->type4.radius);
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}
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static void monster_update_y_velocity(struct object_t *obj, struct level_monster_t *m) {
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if ((m->flags & 1) != 0 && ((obj->spr_num & 0x2000) != 0 || g_vars.objects_tbl[1].y_pos >= obj->y_pos)) {
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if (obj->data.m.y_velocity < 240) {
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obj->data.m.y_velocity += 15;
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}
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} else {
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monster_reset(obj, m);
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}
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}
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static void monster_func1_type2(struct object_t *obj) {
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monster_func1_helper(obj, obj->x_pos, obj->y_pos);
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struct level_monster_t *m = obj->data.m.ref;
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const uint8_t state = obj->data.m.state;
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if (state < 2) {
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monster_rotate_tiles(m, 0, obj->y_pos - m->y_pos);
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if (state == 0) {
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obj->data.m.y_velocity = m->type2.unkE << 4;
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const int dy = obj->y_pos - m->y_pos;
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if (m->type2.y_range >= dy) {
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return;
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}
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obj->data.m.state = 1;
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monster_change_next_anim(obj);
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} else if (state == 1) {
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obj->data.m.y_velocity = -(m->type2.unkE << 4);
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const int dy = obj->y_pos - m->y_pos;
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if (dy >= 0) {
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return;
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}
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obj->data.m.state = 0;
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monster_change_prev_anim(obj);
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}
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} else if (state == 0xFF) {
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monster_update_y_velocity(obj, m);
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}
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}
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static void monster_func1_type3(struct object_t *obj) {
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monster_func1_helper(obj, obj->x_pos, obj->y_pos);
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struct level_monster_t *m = obj->data.m.ref;
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const uint8_t state = obj->data.m.state;
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if (state == 0) {
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if (monster_next_tick(m)) {
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return;
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}
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const int dx = abs(m->x_pos - g_vars.objects_tbl[1].x_pos) >> 4;
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if (m->type3.unkD < dx) {
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return;
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}
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m->flags &= ~0x10;
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obj->data.m.state = 1;
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obj->data.m.y_velocity = 32;
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monster_change_next_anim(obj);
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} else if (state == 1) {
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monster_rotate_tiles(m, 0, obj->y_pos - m->y_pos);
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const uint16_t pos = ((obj->y_pos >> 4) << 8) | (obj->x_pos >> 4);
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const uint8_t tile_num = g_res.leveldat[pos];
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if (g_res.level.tile_attributes1[tile_num] == 0) {
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return;
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}
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obj->y_pos &= ~15;
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obj->data.m.y_velocity = 0;
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obj->data.m.state = 2;
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m->flags |= 0x48;
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const int dx = (g_vars.objects_tbl[1].x_pos >= obj->x_pos) ? 48 : -48;
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obj->data.m.x_velocity = dx;
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monster_change_next_anim(obj);
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} else if (state == 2) {
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if (obj->x_pos < 0) {
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obj->data.m.x_velocity = -obj->data.m.x_velocity;
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}
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} else if (state == 0xFF) {
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monster_update_y_velocity(obj, m);
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}
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}
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static void monster_func1_type4(struct object_t *obj) {
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monster_func1_helper(obj, obj->x_pos, obj->y_pos);
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struct level_monster_t *m = obj->data.m.ref;
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const uint8_t state = obj->data.m.state;
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if (state == 0) {
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if (monster_next_tick(m)) {
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return;
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}
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const int dy = obj->y_pos - m->y_pos;
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monster_rotate_tiles(m, 0, dy);
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if (m->type4.radius > dy) {
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obj->y_pos += 2;
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} else {
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obj->data.m.state = 1;
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}
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} else if (state == 1) {
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monster_rotate_pos(obj, m);
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m->type4.angle += 4;
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if (m->type4.angle >= m->type4.unkE) {
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m->type4.angle = m->type4.unkE;
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obj->data.m.state = 2;
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}
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} else if (state == 2) {
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monster_rotate_pos(obj, m);
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if (m->type4.angle & 0x80) {
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++m->type4.unk10;
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} else {
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--m->type4.unk10;
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}
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m->type4.angle = m->type4.unk10;
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} else if (state == 0xFF) {
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monster_update_y_velocity(obj, m);
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}
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}
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static void monster_func1_type7(struct object_t *obj) {
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monster_func1_helper(obj, obj->x_pos, obj->y_pos);
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struct level_monster_t *m = obj->data.m.ref;
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const uint8_t state = obj->data.m.state;
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if (state == 0) {
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const int x_vel = (obj->x_pos <= g_vars.objects_tbl[1].x_pos) ? 1 : -1;
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obj->data.m.x_velocity = x_vel;
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const int dx = abs(g_vars.objects_tbl[1].x_pos - obj->x_pos) >> 4;
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if (m->type7.unkD < dx) {
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return;
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}
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obj->data.m.state = 10;
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int x = m->type7.unkE << 4;
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obj->data.m.y_velocity = x;
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if (obj->data.m.x_velocity & 0x5000) {
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x = -x;
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}
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obj->data.m.x_velocity = x;
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monster_change_next_anim(obj);
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} else if (state == 10) {
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} else if (state == 0xFF) {
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monster_update_y_velocity(obj, m);
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}
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}
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static void monster_func1_type8_helper(struct object_t *obj, struct level_monster_t *m) {
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obj->data.m.y_velocity = -(m->type8.y_step << 4);
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int x_vel = m->type8.x_step << 4;
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if (g_vars.objects_tbl[1].x_pos <= obj->x_pos) {
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x_vel = -x_vel;
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}
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obj->data.m.x_velocity = x_vel;
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obj->data.m.state = 10;
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m->flags |= 0x2C;
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monster_change_next_anim(obj);
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}
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static void monster_func1_type8(struct object_t *obj) {
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monster_func1_helper(obj, obj->x_pos, obj->y_pos);
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struct level_monster_t *m = obj->data.m.ref;
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if (obj->data.m.x_velocity == 0) {
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const int dx = (obj->x_pos <= g_vars.objects_tbl[1].x_pos) ? 1 : -1;
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obj->data.m.x_velocity = dx;
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}
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const uint8_t state = obj->data.m.state;
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if (state == 0 && !monster_next_tick(m)) {
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const int dx = abs(g_vars.objects_tbl[1].x_pos - obj->x_pos);
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if (m->type8.x_range < (dx >> 4)) {
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return;
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}
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const int dy = abs(g_vars.objects_tbl[1].y_pos - obj->y_pos);
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if (m->type8.y_range < (dy >> 4)) {
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return;
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}
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monster_func1_type8_helper(obj, m);
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} else if (state == 10) {
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if (obj->data.m.y_velocity < 0) {
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return;
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}
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obj->data.m.state = 11;
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monster_change_next_anim(obj);
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} else if (state == 11) {
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if (obj->data.m.y_velocity > 0) {
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return;
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}
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obj->data.m.state = 12;
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monster_change_prev_anim(obj);
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monster_change_prev_anim(obj);
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obj->data.m.x_velocity = 0;
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m->current_tick = 0;
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} else if (state == 12 && !monster_next_tick(m)) {
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monster_func1_type8_helper(obj, m);
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} else if (state == 0xFF) {
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monster_update_y_velocity(obj, m);
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}
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}
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static void monster_func1_type9(struct object_t *obj) {
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struct level_monster_t *m = obj->data.m.ref;
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if ((obj->spr_num & 0x2000) == 0 && obj->data.m.state != 0xFF) {
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const int dy = abs(obj->y_pos - g_vars.objects_tbl[1].y_pos);
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if (dy >= 190 || (g_vars.objects_tbl[1].x_pos < m->type9.unkD && g_vars.objects_tbl[1].x_pos + 480 < m->type9.unkD) || (g_vars.objects_tbl[1].x_pos >= m->type9.unkD && m->type9.unkF + 480 <= g_vars.objects_tbl[1].x_pos)) {
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obj->spr_num = 0xFFFF;
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m->flags &= ~4;
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return;
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}
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}
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const uint8_t state = obj->data.m.state;
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if (state == 0) {
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obj->data.m.x_velocity = m->type9.x_step;
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const int x = m->type9.x_step + 3;
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if (x <= m->type9.x_dist) {
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m->type9.x_step = x;
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}
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if (m->type9.unkF < obj->x_pos) {
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obj->data.m.state = 1;
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}
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} else if (state == 1) {
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obj->data.m.x_velocity = m->type9.x_step;
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const int x = m->type9.x_step - 3;
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if (x >= -m->type9.x_dist) {
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m->type9.x_step = x;
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}
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if (m->type9.unkD >= obj->x_pos) {
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obj->data.m.state = 0;
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}
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} else if (state == 0xFF) {
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monster_update_y_velocity(obj, m);
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}
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}
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static void monster_func1_type10(struct object_t *obj) {
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monster_func1_helper(obj, obj->x_pos, obj->y_pos);
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struct level_monster_t *m = obj->data.m.ref;
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const uint8_t state = obj->data.m.state;
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if (g_vars.level_num == 5 && g_vars.shake_screen_counter != 0 && state != 3 && state != 0xFF) {
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m->current_tick = 1;
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}
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if (state == 0) {
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m->flags |= 0x18;
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if (obj->data.m.y_velocity == 0) {
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obj->data.m.state = 1;
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}
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} else if (state == 1) {
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if (obj->data.m.y_velocity != 0) {
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obj->data.m.state = 0;
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} else {
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m->current_tick = 30;
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obj->data.m.state = 2;
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monster_change_next_anim(obj);
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}
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} else if (state == 2) {
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const int dx = abs(obj->data.m.x_velocity);
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if (dx < 16) {
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if (g_vars.monster.hit_mask == 0) {
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return;
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}
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m->flags = 0xF;
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int x_vel = m->type10.unkD;
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if (obj->x_pos >= g_vars.objects_tbl[1].x_pos) {
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x_vel = -x_vel;
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}
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obj->data.m.x_velocity = x_vel;
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}
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if ((g_vars.level_draw_counter & 3) == 0) {
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--m->current_tick;
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if (m->current_tick == 0) {
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obj->data.m.state = 3;
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obj->data.m.y_velocity = 0;
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obj->data.m.x_velocity >>= 15;
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m->flags = 0x36;
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monster_change_next_anim(obj);
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}
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}
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} else if (state == 3) {
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if (g_vars.monster.hit_mask == 0) {
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return;
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}
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monster_reset(obj, m);
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} else if (state == 0xFF) {
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if ((m->flags & 1) != 0 || (obj->data.m.flags & 0x20) != 0 || g_vars.objects_tbl[1].y_pos >= obj->y_pos) {
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if (obj->data.m.y_velocity < 240) {
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obj->data.m.y_velocity += 15;
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}
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} else {
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monster_reset(obj, m);
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}
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}
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}
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static void monster_func1_type11(struct object_t *obj) {
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monster_func1_helper(obj, obj->x_pos, obj->y_pos);
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struct level_monster_t *m = obj->data.m.ref;
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const uint8_t state = obj->data.m.state;
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if (state == 0) {
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if (g_vars.monster.hit_mask == 0) {
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return;
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}
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obj->data.m.state = 1;
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m->flags &= ~0x10;
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int x_vel = m->type11.unkD << 4;
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if (g_vars.objects_tbl[1].x_pos <= obj->x_pos) {
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x_vel = -x_vel;
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}
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obj->data.m.x_velocity = x_vel;
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obj->data.m.y_velocity = -(m->type11.unkE << 4);
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} else if (state == 1) {
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if (obj->data.m.y_velocity < (m->type11.unkF << 4)) {
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obj->data.m.y_velocity += 8;
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}
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} else if (state == 0xFF) {
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if ((obj->data.m.flags & 0x20) != 0 || g_vars.objects_tbl[1].y_pos >= obj->y_pos) {
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if (obj->data.m.y_velocity < 240) {
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obj->data.m.y_velocity += 15;
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}
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} else {
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monster_reset(obj, m);
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}
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}
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}
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static void monster_func1_type12(struct object_t *obj) {
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struct level_monster_t *m = obj->data.m.ref;
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const uint8_t state = obj->data.m.state;
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if (state == 0) {
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int x_vel = m->type12.unkD;
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if (g_vars.objects_tbl[1].x_pos < obj->x_pos) {
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x_vel = -x_vel;
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}
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obj->data.m.x_velocity = x_vel << 4;
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obj->data.m.state = 1;
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} else if (state == 1) {
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if (obj->data.m.flags & 0x20) {
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m->current_tick = 0;
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} else {
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++m->current_tick;
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if (m->current_tick >= 154) {
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obj->data.m.state = 0xFF;
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}
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}
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} else if (state == 0xFF) {
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monster_update_y_velocity(obj, m);
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}
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}
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void monster_func1(int type, struct object_t *obj) {
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switch (type) {
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case 1:
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monster_func1_helper(obj, obj->x_pos, obj->y_pos);
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break;
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case 2:
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monster_func1_type2(obj);
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break;
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case 3:
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monster_func1_type3(obj);
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break;
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case 4:
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monster_func1_type4(obj);
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break;
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case 7:
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monster_func1_type7(obj);
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break;
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case 8:
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monster_func1_type8(obj);
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break;
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case 9:
|
|
monster_func1_type9(obj);
|
|
break;
|
|
case 10:
|
|
monster_func1_type10(obj);
|
|
break;
|
|
case 11:
|
|
monster_func1_type11(obj);
|
|
break;
|
|
case 12:
|
|
monster_func1_type12(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 < MONSTERS_COUNT; ++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.hit_jump_counter = 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.state = 0;
|
|
obj->data.m.energy = m->energy;
|
|
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) {
|
|
if (!monster_is_visible(m->x_pos, m->y_pos)) {
|
|
return false;
|
|
}
|
|
return monster_init_object(m);
|
|
}
|
|
|
|
static bool monster_func2_type2(struct level_monster_t *m) {
|
|
if (!monster_is_visible(m->x_pos, m->y_pos)) {
|
|
return false;
|
|
}
|
|
struct object_t *obj = find_object_monster();
|
|
if (obj) {
|
|
obj->data.m.hit_jump_counter = 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 = 5;
|
|
obj->data.m.y_velocity = 0;
|
|
obj->data.m.x_velocity = 0;
|
|
obj->data.m.state = 0;
|
|
obj->data.m.energy = m->energy;
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool monster_func2_type3(struct level_monster_t *m) {
|
|
if (!monster_func2_type1(m)) {
|
|
return false;
|
|
}
|
|
m->flags = 0x37;
|
|
return true;
|
|
}
|
|
|
|
static bool monster_func2_type4(struct level_monster_t *m) {
|
|
if (!monster_func2_type1(m)) {
|
|
return false;
|
|
}
|
|
m->flags = 5;
|
|
m->type4.angle = 0;
|
|
m->type4.unk10 = 0;
|
|
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 < UCHAR_MAX) {
|
|
++m->current_tick;
|
|
}
|
|
if (m->respawn_ticks > (m->current_tick >> 2)) {
|
|
return false;
|
|
}
|
|
const uint16_t x = m->x_pos;
|
|
const uint16_t y = m->y_pos;
|
|
const int dx = (g_vars.objects_tbl[1].x_pos >> 4) - (x & 255);
|
|
if (dx < 0) {
|
|
return false;
|
|
}
|
|
if ((y & 255) < dx) {
|
|
return false;
|
|
}
|
|
const int dy = (g_vars.objects_tbl[1].y_pos >> 4) - (x >> 8);
|
|
if (dy < 0) {
|
|
return false;
|
|
}
|
|
if ((y >> 8) < dy) {
|
|
return false;
|
|
}
|
|
struct object_t *obj = find_object_monster();
|
|
if (!obj) {
|
|
return false;
|
|
}
|
|
obj->data.m.hit_jump_counter = 0;
|
|
g_vars.monster.current_object = obj;
|
|
static const int16_t dist_tbl[] = { 120, 100, -90, 110, -120, 40, 80, 60 };
|
|
obj->x_pos = g_vars.objects_tbl[1].x_pos + dist_tbl[g_vars.monster.type10_dist & 7];
|
|
++g_vars.monster.type10_dist;
|
|
obj->data.m.x_velocity = 0;
|
|
uint8_t bh = (g_vars.objects_tbl[1].y_pos >> 4) + 4;
|
|
uint8_t bl = (obj->x_pos >> 4);
|
|
uint16_t pos = (bh << 8) | bl;
|
|
for (int i = 0; i < 10 && pos >= 0x300; ++i, pos -= 0x100) {
|
|
if (pos < (g_vars.tilemap_h << 8)) {
|
|
bool init_spr = true;
|
|
for (int j = 0; j < 3; ++j) {
|
|
const uint8_t tile_num = g_res.leveldat[pos - j * 0x100];
|
|
if (g_res.level.tile_attributes1[tile_num] != 0) {
|
|
init_spr = false;
|
|
break;
|
|
}
|
|
}
|
|
if (init_spr) {
|
|
obj->y_pos = (pos >> 8) << 4;
|
|
obj->spr_num = m->spr_num;
|
|
obj->data.m.ref = m;
|
|
m->flags = 0x17;
|
|
obj->data.m.state = 0;
|
|
obj->data.m.y_velocity = 0;
|
|
obj->data.m.energy = m->energy;
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool monster_func2_type11(struct level_monster_t *m) {
|
|
if (m->current_tick < UCHAR_MAX) {
|
|
++m->current_tick;
|
|
}
|
|
if (m->respawn_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;
|
|
}
|
|
|
|
static bool monster_func2_type12(struct level_monster_t *m) {
|
|
if (g_vars.objects_tbl[1].y_pos <= m->y_pos) {
|
|
return false;
|
|
}
|
|
const int dx = abs(m->x_pos - g_vars.objects_tbl[1].x_pos);
|
|
if (dx >= TILEMAP_SCREEN_W * 2) {
|
|
return false;
|
|
}
|
|
if (dx <= TILEMAP_SCREEN_W) {
|
|
const int dy = g_vars.objects_tbl[1].y_pos - m->y_pos;
|
|
if (dy >= 360 || dy <= 180) {
|
|
return false;
|
|
}
|
|
}
|
|
if (m->current_tick < UCHAR_MAX) {
|
|
++m->current_tick;
|
|
}
|
|
if (m->respawn_ticks > (m->current_tick >> 2)) {
|
|
return false;
|
|
}
|
|
if (!monster_init_object(m)) {
|
|
return false;
|
|
}
|
|
m->flags = 0x8F;
|
|
m->current_tick = 0;
|
|
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 3:
|
|
return monster_func2_type3(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);
|
|
case 12:
|
|
return monster_func2_type12(m);
|
|
default:
|
|
print_warning("monster_func2 unhandled monster type %d", type);
|
|
break;
|
|
}
|
|
return false;
|
|
}
|