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#include "asset.h"
#include "random.h"
#include "map.h"
#include "rect.h"
#include "render.h"
#include "world.h"
#define null_tile 0xffff
Rect tile_rects[] = {
#define x(n, x, y) \
{ x, y, map_tile_size, map_tile_size },
tiles_xmacro
#undef x
};
void generate_room(Map* m) {
const Bitmap* b = get_bitmap(asset_id_rooms_img);
const unsigned* p = (const unsigned*)&b[1];
const int max_rooms = b->h / map_h;
const int r = get_r() % max_rooms;
int o = r * map_w * map_h;
int e = map_w * map_h, i;
for (i = 0; i < e; i++, o++) {
int bit = 1 << (o & 0x1f);
if (p[o >> 5] & bit)
m->tiles[i] = tile_brick;
else
m->tiles[i] = null_tile;
}
}
unsigned short get_collider(Map_Tile t) {
switch (t) {
case tile_stone:
case tile_block1:
case tile_block2:
case tile_window_top:
case tile_window_mid:
case tile_window_bot:
case tile_brick_floor:
case tile_trapdoor1:
case tile_trapdoor2:
case tile_brick: return 1;
case tile_brick_ramp5:
case tile_stone_ramp5: return 2;
case tile_brick_ramp6:
case tile_stone_ramp6: return 3;
case tile_brick_ramp7:
case tile_stone_ramp7: return 4;
case tile_brick_ramp8:
case tile_stone_ramp8: return 5;
default:
return 0;
}
}
void generate_collision(Map* m) {
int e = map_w * map_h, i;
for (i = 0; i < e; i++)
m->collision[i] = get_collider(m->tiles[i]);
}
int imp_check(Map* m, Map_Tile t, int x, int y) {
return
x >= 0 &&
y >= 0 &&
x < map_w &&
y < map_h &&
m->tiles[x + y * map_w] == t;
}
#define check(ox, oy, t) \
imp_check(m, t, x + ox, y + oy)
#define place(t) \
m->tiles[x + y * map_w] = t
#define place_o(t, ox, oy) \
m->tiles[x + ox + (y + oy) * map_w] = t
#define place_a(t, x, y) \
m->tiles[x + y * map_w] = t
void generate_ramps(Map* m) {
int x, y;
for (y = 0; y < map_h; y++)
for (x = 0; x < map_w; x++) {
if (
check( 0, 0, null_tile) &&
check( 1, 0, null_tile) &&
check(-1, 0, tile_brick) &&
!check(-1, -1, tile_brick) &&
check( 0, 1, tile_brick) &&
check( 1, 1, tile_brick)
) {
place(tile_brick_ramp7);
place_o(tile_brick_ramp8, 1, 0);
}
if (
check( 0, 0, null_tile) &&
check(-1, 0, null_tile) &&
check( 1, 0, tile_brick) &&
!check( 1, -1, tile_brick) &&
check( 0, 1, tile_brick) &&
check(-1, 1, tile_brick)
) {
place(tile_brick_ramp6);
place_o(tile_brick_ramp5, -1, 0);
}
if (
check(0, 0, tile_brick) &&
check(0, 1, tile_brick) &&
check(0, 2, tile_brick) && ((
check(1, 0, null_tile) &&
check(1, 1, null_tile) &&
check(1, 2, null_tile)) || (
check(-1, 0, null_tile) &&
check(-1, 1, null_tile) &&
check(-1, 2, null_tile)))
) {
place(tile_window_top);
place_o(tile_window_mid, 0, 1);
place_o(tile_window_bot, 0, 2);
}
}
}
void generate_floors(Map* m) {
int x, y;
for (y = 0; y < map_h; y++)
for (x = 0; x < map_w; x++) {
if (
check(0, 0, tile_brick) &&
check(0, -1, null_tile)
) place(tile_brick_floor);
}
}
void generate_doors(Map* m) {
const int hx = map_w >> 1;
const int t = 0;
const int b = map_h - 1;
place_a(tile_trapdoor1, hx, b);
place_a(tile_trapdoor2, hx + 1, b);
place_a(tile_trapdoor3, hx, t);
place_a(tile_trapdoor4, hx + 1, t);
}
#undef check
#undef place
void generate_enemies(const Map* m, World* w) {
#define check \
(m->collision[x + y * map_w] == 1 && \
m->collision[x + (y - 1) * map_w] == 0)
int x, y, ex = map_w - 1, ey = map_h - 1;
for (y = 1; y < ey; y++) {
for (x = 1; x < ex; x++) {
int plat = -1;
for (; x < ex; x++)
if (check) {
plat = 0;
break;
}
if (!plat)
for (; check && x < ex; x++, plat++);
if (plat >= 3) {
Enemy* e;
int sx = x - (plat >> 1);
e = inst_enemy(
w,
enemy_demon,
(sx * map_tile_size) << fbits,
((y - 1) * map_tile_size) << fbits
);
e->face = get_r() & 1;
}
for (; check && x < ex; x++);
}
}
}
void generate_floor(Map* m, World* w) {
Player* p = &w->player;
w->enemy_count = 0;
w->effect_count = 0;
w->deathzone_count = 0;
generate_room(m);
generate_ramps(m);
generate_doors(m);
generate_floors(m);
generate_collision(m);
generate_enemies(m, w);
p->x = (map_w >> 1) << fbits;
p->y = (map_h - 2) << fbits;
p->x *= map_tile_size;
p->y *= map_tile_size;
p->x += (map_tile_size >> 1) << fbits;
p->vx = 0;
p->vy = 0;
}
void render_map(const Map* m, Renderer* r) {
const Bitmap* tm = get_bitmap(asset_id_map_img);
int t = 0, x, y;
for (y = 0; y < map_h; y++) {
for (x = 0; x < map_w; x++, t++) {
int tile = m->tiles[t];
if (tile != null_tile)
ren_map(
r,
x * map_tile_size,
y * map_tile_size,
&tile_rects[tile],
tm
);
}
}
}
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