kitchen: README + MISSIONS/engine-c keep-drop notes

2026-09-17 21:48:48 +02:00 · 2026-09-17 21:48:48 +02:00 · 575d7d29b8
commit 575d7d29b8
parent 1d351918da
130 changed files with 9817 additions and 1 deletions
--- a/engine-c/src/ai.c
+++ b/engine-c/src/ai.c
@ -0,0 +1,124 @@
+#include "kknd.h"
+
+/* =========================================================================
+ * ai.c - Enemy/human commander. Grows an economy and launches attack waves.
+ * ========================================================================= */
+
+static Building *ai_find_bld(Game *g, Faction f, BuildingType t) {
+    for (int i = 0; i < g->bld_count; i++) {
+        Building *b = &g->buildings[i];
+        if (b->dead || b->faction != f || b->type != t) continue;
+        if (b->build < 1.0f) continue;
+        return b;
+    }
+    return NULL;
+}
+
+static int ai_count_units(Game *g, Faction f, int combat_only) {
+    int n = 0;
+    for (int i = 0; i < g->unit_count; i++) {
+        Unit *u = &g->units[i];
+        if (u->dead || u->faction != f) continue;
+        if (combat_only && (u->type == UT_HARVESTER)) continue;
+        n++;
+    }
+    return n;
+}
+
+static int ai_count_harvesters(Game *g, Faction f) {
+    int n = 0;
+    for (int i = 0; i < g->unit_count; i++) {
+        Unit *u = &g->units[i];
+        if (u->dead || u->faction != f) continue;
+        if (u->type == UT_HARVESTER) n++;
+    }
+    return n;
+}
+
+static void ai_run_faction(Game *g, Faction f) {
+    Building *base = ai_find_bld(g, f, BT_BASE);
+    Building *wf   = ai_find_bld(g, f, BT_WARFACTORY);
+    Building *ref  = ai_find_bld(g, f, BT_REFINERY);
+    if (!base) return;
+
+    /* early defensive turret */
+    if (g->time < 60 && g->scrap[f] > 600) {
+        int bx = base->tx + 3, by = base->ty - 2;
+        if (bld_can_place(g, BT_TURRET, bx, by)) {
+            if (bld_spawn(g, BT_TURRET, f, bx, by) >= 0)
+                g->scrap[f] -= bld_def(BT_TURRET)->cost;
+        }
+    }
+
+    /* research lab + upgrades */
+    if (!ai_find_bld(g, f, BT_RESEARCH) && g->scrap[f] > 400) {
+        int bx = base->tx - 3, by = base->ty + 2;
+        if (bld_can_place(g, BT_RESEARCH, bx, by)) {
+            int r = bld_spawn(g, BT_RESEARCH, f, bx, by);
+            if (r >= 0) g->scrap[f] -= bld_def(BT_RESEARCH)->cost;
+        }
+    }
+    if (g->research_lab[f] > 0 && g->research_cur[f] < 0) {
+        int best = -1, bestlv = 99;
+        for (int u = 0; u < UP_COUNT; u++) {
+            if (g->upg[f].lvl[u] >= UP_MAX_LVL) continue;
+            if (g->upg[f].lvl[u] < bestlv) { bestlv = g->upg[f].lvl[u]; best = u; }
+        }
+        if (best >= 0) bld_research(g, f, best);
+    }
+
+    /* keep harvesters flowing */
+    if (ref && ai_count_harvesters(g, f) < 4 && g->scrap[f] >= 300)
+        bld_queue_unit(g, (int)(ref - g->buildings), UT_HARVESTER);
+
+    /* pump combat units */
+    if (wf) {
+        int combat = ai_count_units(g, f, 1);
+        int cap = (g->diff == DIFF_HARD) ? 40 : (g->diff == DIFF_NORMAL ? 28 : 18);
+        if (combat < cap) {
+            int r = rng_range(&(RNG){0}, 0, 6);
+            UnitType pick = (r == 0) ? UT_BUGGY : (r == 1) ? UT_TANK
+                         : (r == 2) ? UT_ARTILLERY : (r == 3) ? UT_JEEP
+                         : (r == 4) ? UT_RAVAGER : (r == 5) ? UT_FLAME
+                         : UT_MISSILE;
+            bld_queue_unit(g, (int)(wf - g->buildings), pick);
+        }
+    }
+
+    /* attack wave every ~35s once we have a force */
+    g->ai_wave[f] += (g->diff == DIFF_HARD ? 4.0f : (g->diff == DIFF_NORMAL ? 6.0f : 9.0f));
+    if (g->ai_wave[f] >= 35.0f) {
+        g->ai_wave[f] = 0;
+        Faction foe = (f == g->human) ? g->enemy : g->human;
+        int hx = g->map.spawn_x[foe], hy = g->map.spawn_y[foe];
+        float tx, ty; map_tile_to_world(hx, hy, &tx, &ty);
+        int launched = 0;
+        for (int i = 0; i < g->unit_count; i++) {
+            Unit *u = &g->units[i];
+            if (u->dead || u->faction != f) continue;
+            if (u->type == UT_HARVESTER) continue;
+            unit_issue_move(g, (int)(u - g->units), tx, ty, 1);
+            launched++;
+        }
+        if (launched > 0) {
+            engine_log("%s warband (%d) advances on the %s!",
+                faction_name(f), launched, faction_name(foe));
+            if (f == g->human)
+                game_log(g, "Warband (%d units) sent to attack!", launched);
+        }
+    }
+}
+
+void ai_command(Faction f, int diff) { (void)f; (void)diff; }
+
+void ai_update(Game *g, float dt) {
+    g->ai_timer -= dt;
+    if (g->ai_timer > 0) return;
+
+    float interval = (g->diff == DIFF_HARD) ? 4.0f :
+                     (g->diff == DIFF_NORMAL ? 6.0f : 9.0f);
+    g->ai_timer = interval;
+
+    ai_run_faction(g, g->enemy);
+    if (g_auto) ai_run_faction(g, g->human);
+}