forked from tas/major_tom
fac7085056
Introduce moon01.lvl as the starting level — a pure jump-and-run intro with no gun and no enemies, just platforming over gaps and dodging falling asteroids. The player picks up their gun upon transitioning to level01. New features: - Moon tileset and PARALLAX_STYLE_MOON with crater terrain backgrounds - Asteroid entity (ENT_ASTEROID): falls from sky, damages on contact, explodes on ground with particles, respawns after delay - PLAYER_UNARMED directive disables gun for the level - Pit rescue mechanic: falling costs 1 HP and auto-dashes upward - Gun powerup entity type for future armed-pickup levels - Segment-based procedural level generator with themed rooms - Extended editor with entity palette and improved tile cycling - Web shell improvements for Emscripten builds
254 lines
9.8 KiB
C
254 lines
9.8 KiB
C
#include "engine/tilemap.h"
|
|
#include "engine/camera.h"
|
|
#include "engine/assets.h"
|
|
#include <SDL2/SDL_image.h>
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
bool tilemap_load(Tilemap *map, const char *path, SDL_Renderer *renderer) {
|
|
FILE *f = fopen(path, "r");
|
|
if (!f) {
|
|
fprintf(stderr, "Failed to open level: %s\n", path);
|
|
return false;
|
|
}
|
|
|
|
memset(map, 0, sizeof(Tilemap));
|
|
|
|
char line[1024];
|
|
char tileset_path[256] = {0};
|
|
int current_layer = -1; /* 0=collision, 1=bg, 2=fg */
|
|
int row = 0;
|
|
|
|
while (fgets(line, sizeof(line), f)) {
|
|
/* Skip comments and empty lines */
|
|
if (line[0] == '#' || line[0] == '\n' || line[0] == '\r') continue;
|
|
|
|
/* Parse directives */
|
|
if (strncmp(line, "TILESET ", 8) == 0) {
|
|
sscanf(line + 8, "%255s", tileset_path);
|
|
} else if (strncmp(line, "SIZE ", 5) == 0) {
|
|
sscanf(line + 5, "%d %d", &map->width, &map->height);
|
|
if (map->width <= 0 || map->height <= 0 ||
|
|
map->width > 4096 || map->height > 4096) {
|
|
fprintf(stderr, "Invalid map size: %dx%d\n", map->width, map->height);
|
|
fclose(f);
|
|
return false;
|
|
}
|
|
int total = map->width * map->height;
|
|
map->collision_layer = calloc(total, sizeof(uint16_t));
|
|
map->bg_layer = calloc(total, sizeof(uint16_t));
|
|
map->fg_layer = calloc(total, sizeof(uint16_t));
|
|
} else if (strncmp(line, "SPAWN ", 6) == 0) {
|
|
float sx, sy;
|
|
sscanf(line + 6, "%f %f", &sx, &sy);
|
|
map->player_spawn = vec2(sx * TILE_SIZE, sy * TILE_SIZE);
|
|
} else if (strncmp(line, "GRAVITY ", 8) == 0) {
|
|
sscanf(line + 8, "%f", &map->gravity);
|
|
} else if (strncmp(line, "TILEDEF ", 8) == 0) {
|
|
int id, tx, ty;
|
|
uint32_t flags;
|
|
sscanf(line + 8, "%d %d %d %u", &id, &tx, &ty, &flags);
|
|
if (id < MAX_TILE_DEFS) {
|
|
map->tile_defs[id].tex_x = (uint16_t)tx;
|
|
map->tile_defs[id].tex_y = (uint16_t)ty;
|
|
map->tile_defs[id].flags = flags;
|
|
if (id >= map->tile_def_count) {
|
|
map->tile_def_count = id + 1;
|
|
}
|
|
}
|
|
} else if (strncmp(line, "BG_COLOR ", 9) == 0) {
|
|
int r, g, b;
|
|
if (sscanf(line + 9, "%d %d %d", &r, &g, &b) == 3) {
|
|
map->bg_color = (SDL_Color){
|
|
(uint8_t)r, (uint8_t)g, (uint8_t)b, 255
|
|
};
|
|
map->has_bg_color = true;
|
|
}
|
|
} else if (strncmp(line, "PARALLAX_FAR ", 13) == 0) {
|
|
sscanf(line + 13, "%255s", map->parallax_far_path);
|
|
} else if (strncmp(line, "PARALLAX_NEAR ", 14) == 0) {
|
|
sscanf(line + 14, "%255s", map->parallax_near_path);
|
|
} else if (strncmp(line, "MUSIC ", 6) == 0) {
|
|
sscanf(line + 6, "%255s", map->music_path);
|
|
} else if (strncmp(line, "PARALLAX_STYLE ", 15) == 0) {
|
|
int style = 0;
|
|
if (sscanf(line + 15, "%d", &style) == 1) {
|
|
map->parallax_style = style;
|
|
}
|
|
} else if (strncmp(line, "PLAYER_UNARMED", 14) == 0) {
|
|
map->player_unarmed = true;
|
|
} else if (strncmp(line, "EXIT ", 5) == 0) {
|
|
if (map->exit_zone_count < MAX_EXIT_ZONES) {
|
|
ExitZone *ez = &map->exit_zones[map->exit_zone_count];
|
|
float tx, ty, tw, th;
|
|
char target[ASSET_PATH_MAX] = {0};
|
|
/* EXIT <tile_x> <tile_y> <tile_w> <tile_h> [target_path] */
|
|
int n = sscanf(line + 5, "%f %f %f %f %255s",
|
|
&tx, &ty, &tw, &th, target);
|
|
if (n >= 4) {
|
|
ez->x = tx * TILE_SIZE;
|
|
ez->y = ty * TILE_SIZE;
|
|
ez->w = tw * TILE_SIZE;
|
|
ez->h = th * TILE_SIZE;
|
|
if (n == 5) {
|
|
snprintf(ez->target, sizeof(ez->target), "%s", target);
|
|
} else {
|
|
ez->target[0] = '\0'; /* no target = victory */
|
|
}
|
|
map->exit_zone_count++;
|
|
}
|
|
}
|
|
} else if (strncmp(line, "ENTITY ", 7) == 0) {
|
|
if (map->entity_spawn_count < MAX_ENTITY_SPAWNS) {
|
|
EntitySpawn *es = &map->entity_spawns[map->entity_spawn_count];
|
|
float tx, ty;
|
|
if (sscanf(line + 7, "%31s %f %f", es->type_name, &tx, &ty) == 3) {
|
|
es->x = tx * TILE_SIZE;
|
|
es->y = ty * TILE_SIZE;
|
|
map->entity_spawn_count++;
|
|
}
|
|
}
|
|
} else if (strncmp(line, "LAYER ", 6) == 0) {
|
|
row = 0;
|
|
if (strstr(line, "collision")) current_layer = 0;
|
|
else if (strstr(line, "bg")) current_layer = 1;
|
|
else if (strstr(line, "fg")) current_layer = 2;
|
|
} else if (current_layer >= 0 && map->width > 0) {
|
|
/* Parse tile row */
|
|
uint16_t *layer = NULL;
|
|
switch (current_layer) {
|
|
case 0: layer = map->collision_layer; break;
|
|
case 1: layer = map->bg_layer; break;
|
|
case 2: layer = map->fg_layer; break;
|
|
}
|
|
if (layer && row < map->height) {
|
|
char *tok = strtok(line, " \t\n\r");
|
|
for (int col = 0; col < map->width && tok; col++) {
|
|
layer[row * map->width + col] = (uint16_t)atoi(tok);
|
|
tok = strtok(NULL, " \t\n\r");
|
|
}
|
|
row++;
|
|
}
|
|
}
|
|
}
|
|
fclose(f);
|
|
|
|
/* Load tileset texture */
|
|
if (tileset_path[0] && renderer) {
|
|
map->tileset = assets_get_texture(tileset_path);
|
|
if (map->tileset) {
|
|
int tex_w;
|
|
SDL_QueryTexture(map->tileset, NULL, NULL, &tex_w, NULL);
|
|
map->tileset_cols = tex_w / TILE_SIZE;
|
|
}
|
|
}
|
|
|
|
printf("Loaded level: %s (%dx%d tiles)\n", path, map->width, map->height);
|
|
return true;
|
|
}
|
|
|
|
void tilemap_render_layer(const Tilemap *map, const uint16_t *layer,
|
|
const Camera *cam, SDL_Renderer *renderer) {
|
|
if (!map || !layer || !map->tileset) return;
|
|
|
|
/* Only render visible tiles */
|
|
int start_x = 0, start_y = 0;
|
|
int end_x = map->width, end_y = map->height;
|
|
|
|
if (cam) {
|
|
float inv_zoom = (cam->zoom > 0.0f) ? (1.0f / cam->zoom) : 1.0f;
|
|
start_x = (int)(cam->pos.x / TILE_SIZE) - 1;
|
|
start_y = (int)(cam->pos.y / TILE_SIZE) - 1;
|
|
end_x = start_x + (int)(cam->viewport.x * inv_zoom / TILE_SIZE) + 3;
|
|
end_y = start_y + (int)(cam->viewport.y * inv_zoom / TILE_SIZE) + 3;
|
|
|
|
if (start_x < 0) start_x = 0;
|
|
if (start_y < 0) start_y = 0;
|
|
if (end_x > map->width) end_x = map->width;
|
|
if (end_y > map->height) end_y = map->height;
|
|
}
|
|
|
|
for (int y = start_y; y < end_y; y++) {
|
|
for (int x = start_x; x < end_x; x++) {
|
|
uint16_t tile_id = layer[y * map->width + x];
|
|
if (tile_id == 0) continue; /* 0 = empty */
|
|
|
|
/* Look up tile definition for source rect */
|
|
SDL_Rect src;
|
|
if (tile_id < map->tile_def_count &&
|
|
(map->tile_defs[tile_id].tex_x || map->tile_defs[tile_id].tex_y)) {
|
|
src.x = map->tile_defs[tile_id].tex_x * TILE_SIZE;
|
|
src.y = map->tile_defs[tile_id].tex_y * TILE_SIZE;
|
|
} else {
|
|
/* Fallback: tile_id maps directly to tileset grid position */
|
|
int cols = map->tileset_cols > 0 ? map->tileset_cols : 16;
|
|
src.x = ((tile_id - 1) % cols) * TILE_SIZE;
|
|
src.y = ((tile_id - 1) / cols) * TILE_SIZE;
|
|
}
|
|
src.w = TILE_SIZE;
|
|
src.h = TILE_SIZE;
|
|
|
|
Vec2 world_pos = vec2(tile_to_world(x), tile_to_world(y));
|
|
Vec2 screen_pos = cam ? camera_world_to_screen(cam, world_pos) : world_pos;
|
|
|
|
float tile_draw_size = TILE_SIZE;
|
|
if (cam && cam->zoom != 1.0f && cam->zoom > 0.0f) {
|
|
tile_draw_size = TILE_SIZE * cam->zoom;
|
|
}
|
|
|
|
SDL_Rect dst = {
|
|
(int)screen_pos.x,
|
|
(int)screen_pos.y,
|
|
(int)(tile_draw_size + 0.5f),
|
|
(int)(tile_draw_size + 0.5f)
|
|
};
|
|
|
|
SDL_RenderCopy(renderer, map->tileset, &src, &dst);
|
|
}
|
|
}
|
|
}
|
|
|
|
bool tilemap_is_solid(const Tilemap *map, int tile_x, int tile_y) {
|
|
if (!map) return false;
|
|
if (tile_x < 0 || tile_x >= map->width) return true; /* out of bounds = solid */
|
|
if (tile_y < 0) return false; /* above map = open */
|
|
if (tile_y >= map->height) return true; /* below map = solid */
|
|
|
|
uint16_t tile_id = map->collision_layer[tile_y * map->width + tile_x];
|
|
if (tile_id == 0) return false;
|
|
|
|
/* Check tile def flags */
|
|
if (tile_id < map->tile_def_count) {
|
|
return (map->tile_defs[tile_id].flags & TILE_SOLID) != 0;
|
|
}
|
|
|
|
/* Default: non-zero collision tile is solid */
|
|
return true;
|
|
}
|
|
|
|
uint32_t tilemap_flags_at(const Tilemap *map, int tile_x, int tile_y) {
|
|
if (!map) return 0;
|
|
if (tile_x < 0 || tile_x >= map->width) return TILE_SOLID;
|
|
if (tile_y < 0) return 0;
|
|
if (tile_y >= map->height) return TILE_SOLID;
|
|
|
|
uint16_t tile_id = map->collision_layer[tile_y * map->width + tile_x];
|
|
if (tile_id == 0) return 0;
|
|
|
|
if (tile_id < map->tile_def_count) {
|
|
return map->tile_defs[tile_id].flags;
|
|
}
|
|
|
|
return TILE_SOLID; /* default non-zero = solid */
|
|
}
|
|
|
|
void tilemap_free(Tilemap *map) {
|
|
if (!map) return;
|
|
free(map->collision_layer);
|
|
free(map->bg_layer);
|
|
free(map->fg_layer);
|
|
/* Don't free tileset - asset manager owns it */
|
|
memset(map, 0, sizeof(Tilemap));
|
|
}
|