kitchen: README + MISSIONS/engine-c keep-drop notes
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Hernâni Marques
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130 changed files with 9817 additions and 1 deletions
188
engine-c/src/engine.c
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188
engine-c/src/engine.c
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#include "kknd.h"
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/* =========================================================================
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* engine.c - Match setup, main simulation step and win/lose logic.
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* ========================================================================= */
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int g_headless = 0;
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int g_auto = 0;
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void engine_log(const char *fmt, ...) {
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va_list ap;
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va_start(ap, fmt);
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char buf[512];
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vsnprintf(buf, sizeof buf, fmt, ap);
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va_end(ap);
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printf("[kknd] %s\n", buf);
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fflush(stdout);
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}
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void game_log(Game *g, const char *fmt, ...) {
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va_list ap;
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va_start(ap, fmt);
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vsnprintf(g->log_msg[g->log_next], 96, fmt, ap);
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va_end(ap);
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g->log_next = (g->log_next + 1) % 32;
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if (g->log_count < 32) g->log_count++;
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}
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void engine_init(Game *g, const char *title) {
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memset(g, 0, sizeof(Game));
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g->wrecks = (Wreck *)calloc(MAX_WRECKS, sizeof(Wreck));
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config_init();
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if (!g_headless) {
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audio_init();
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if (!render_init(g)) {
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fprintf(stderr, "Failed to initialise renderer\n");
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exit(1);
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}
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} else {
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(void)title;
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}
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g->state = GAME_MENU;
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g->human = FACTION_SURVIVOR;
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g->diff = DIFF_NORMAL;
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g->speed_mul = 1.0f;
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g->unlocked = 1;
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g->menu_sel = 0;
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}
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void engine_shutdown(Game *g) {
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free(g->wrecks);
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sprites_free(&g->spr);
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if (g->ren) SDL_DestroyRenderer(g->ren);
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if (g->win) SDL_DestroyWindow(g->win);
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audio_shutdown();
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SDL_Quit();
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map_free(&g->map);
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}
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static void place_start(Game *g, Faction f) {
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int sx = g->map.spawn_x[f], sy = g->map.spawn_y[f];
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int bx = sx - 1, by = sy - 1;
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bld_spawn(g, BT_BASE, f, bx, by);
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bld_spawn(g, BT_REFINERY, f, bx, sy + 2);
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bld_spawn(g, BT_WARFACTORY, f, sx + 2, by);
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bld_spawn(g, BT_POWER, f, sx + 2, sy + 2);
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float wx, wy; map_tile_to_world(sx, sy, &wx, &wy);
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/* harvesters */
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for (int i = 0; i < 2; i++)
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unit_spawn(g, UT_HARVESTER, f, wx + (i*24-12), wy + 30);
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/* starting infantry */
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for (int i = 0; i < 4; i++)
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unit_spawn(g, (f==FACTION_SURVIVOR?UT_INFANTRY:UT_INFANTRY), f,
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wx - 40 + i*20, wy - 20);
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/* a couple of buggies */
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for (int i = 0; i < 2; i++)
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unit_spawn(g, (f==FACTION_SURVIVOR?UT_BUGGY:UT_BUGGY), f,
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wx - 30 + i*30, wy - 40);
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}
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void engine_setup_match(Game *g, int mission_id) {
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const Mission *m = mission_get(mission_id);
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g->mission_id = m->id;
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g->objective = m->objective;
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g->diff = (Difficulty)m->diff;
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g->obj_timer = 0;
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/* resolve the enemy faction (never the player's own side) */
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Faction enemy = m->enemy;
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if (enemy == g->human)
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enemy = (g->human == FACTION_SURVIVOR) ? FACTION_EVOLVED : FACTION_SURVIVOR;
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g->enemy = enemy;
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RNG rng;
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rng_seed(&rng, (uint64_t)m->seed ^ 0x4B4B4E44ULL);
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g->map.style = m->map_style;
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map_init(&g->map, &rng);
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g->unit_count = 0; g->unit_next_id = 1;
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g->bld_count = 0; g->bld_next_id = 1;
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g->bullet_count = 0; g->particle_count = 0;
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g->sel_count = 0; g->placing = 0;
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g->time = 0; g->frames = 0; g->winner = 0;
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g->ai_timer = 5.0f;
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g->log_count = 0; g->log_next = 0;
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for (int f = 1; f < MAX_FACTIONS; f++) {
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g->scrap[f] = START_SCRAP;
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g->power[f] = 0; g->pop[f] = 0; g->pop_cap[f] = 0;
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for (int u = 0; u < UP_COUNT; u++) g->upg[f].lvl[u] = 0;
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g->research_lab[f] = 0;
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g->research_cur[f] = -1;
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g->research_prog[f] = 0;
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}
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place_start(g, g->human);
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place_start(g, enemy);
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/* fortress theme: wall the enemy base (leave a gate on the far edge) */
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if (m->map_style == 3) {
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int sx = g->map.spawn_x[enemy], sy = g->map.spawn_y[enemy];
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for (int dx = -2; dx <= 4; dx++)
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for (int dy = -2; dy <= 4; dy++) {
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int perimeter = (dx == -2 || dx == 4 || dy == -2 || dy == 4);
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if (!perimeter) continue;
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if (dy == 4) continue; /* gate on the far edge */
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bld_spawn(g, BT_WALL, enemy, sx + dx, sy + dy);
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}
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}
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/* centre camera on player base */
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int hx = g->map.spawn_x[g->human], hy = g->map.spawn_y[g->human];
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g->cam.x = (float)(hx*TILE - VIEW_W/2);
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g->cam.y = (float)(hy*TILE - VIEW_H/2);
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if (g->cam.x < 0) g->cam.x = 0;
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if (g->cam.y < 0) g->cam.y = 0;
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g->state = GAME_PLAYING;
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engine_log("Mission %d '%s': %s vs %s (%s)",
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m->id, m->name, faction_name(g->human), faction_name(enemy),
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m->diff==DIFF_EASY?"Easy":m->diff==DIFF_HARD?"Hard":"Normal");
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}
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void engine_check_win(Game *g) {
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Faction human = g->human;
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Faction enemy = g->enemy;
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int human_base = 0, enemy_base = 0;
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int human_bld = 0, enemy_bld = 0;
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for (int i = 0; i < g->bld_count; i++) {
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Building *b = &g->buildings[i];
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if (b->dead) continue;
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if (b->faction == human) { human_bld++; if (b->type==BT_BASE) human_base=1; }
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if (b->faction == enemy) { enemy_bld++; if (b->type==BT_BASE) enemy_base=1; }
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}
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if (!human_base || human_bld == 0) { g->state = GAME_LOST; g->winner = enemy; return; }
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switch (g->objective) {
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case OBJ_SURVIVE:
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if (g->time >= ((const Mission*)mission_get(g->mission_id))->survive_time)
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{ g->state = GAME_WON; g->winner = human; }
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break;
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case OBJ_GATHER:
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if (g->scrap[human] >= ((const Mission*)mission_get(g->mission_id))->scrap_goal)
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{ g->state = GAME_WON; g->winner = human; }
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break;
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default: /* OBJ_DESTROY_ALL */
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if (!enemy_base || enemy_bld == 0) { g->state = GAME_WON; g->winner = human; }
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break;
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}
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}
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void engine_update(Game *g, float dt) {
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if (g->state != GAME_PLAYING) return;
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dt *= g->speed_mul;
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g->time += dt;
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g->frames++;
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unit_update(g, dt);
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bld_update(g, dt);
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bullet_update(g, dt);
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particle_update(g, dt);
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ai_update(g, dt);
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map_update_fog(g, g->human);
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audio_music_tick(dt);
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if (g->cam.shake > 0) { g->cam.shake -= dt * 24.0f; if (g->cam.shake < 0) g->cam.shake = 0; }
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engine_check_win(g);
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}
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