starting on round logic

src/round.cpp

@@ -0,0 +1,137 @@
+#include "Round.h"
+#include "Creature.h"
+#include <algorithm>
+#include <cmath>
+#include <raylib.h>
+
+namespace {
+AppearanceTier RollAppearanceTier(const RoundConfig &cfg) {
+  float roll = (float)GetRandomValue(0, 10000) / 10000.0f;
+  float t1 = cfg.w_standard;
+  float t2 = t1 + cfg.w_subtle1;
+  float t3 = t2 + cfg.w_subtle2;
+
+  if (roll < t1)
+    return AppearanceTier::Standard;
+  if (roll < t2)
+    return AppearanceTier::Subtle1;
+  if (roll < t3)
+    return AppearanceTier::Subtle2;
+  return AppearanceTier::Obvious;
+}
+
+float IncorrectBehaviourChance(AppearanceTier tier) {
+  switch (tier) {
+  case AppearanceTier::Standard:
+    return 1.0f;
+  case AppearanceTier::Subtle1:
+    return 0.5f;
+  case AppearanceTier::Subtle2:
+    return 0.5f;
+  case AppearanceTier::Obvious:
+    return 0.3f;
+  }
+  return 1.0f;
+}
+
+Species RandomSpecies() { return static_cast<Species>(GetRandomValue(0, 3)); }
+} // namespace
+
+RoundConfig MakeRoundConfig(int roundIndex) {
+  RoundConfig cfg;
+  cfg.creature_count = std::min(5 + roundIndex * 2, 20);
+  cfg.marshmallow_supply =
+      std::max(2, (int)std::round(cfg.creature_count * 0.4f));
+
+  float rampedStandard = std::min(0.35f + roundIndex * 0.03f, 0.70f);
+  float remaining = 1.0f - rampedStandard;
+  float baseRemaining = 0.30f + 0.20f + 0.15f;
+  cfg.w_standard = rampedStandard;
+  cfg.w_subtle1 = remaining * (0.30f / baseRemaining);
+  cfg.w_subtle2 = remaining * (0.20f / baseRemaining);
+  cfg.w_obvious = remaining * (0.15f / baseRemaining);
+
+  return cfg;
+}
+
+Round GenerateRound(const RoundConfig &config) {
+  Round round;
+  round.conf = config;
+  round.marshmallowsRemaining = config.marshmallow_supply;
+
+  int cryptidCount =
+      std::clamp((int)std::round(config.creature_count * config.cryptid_ratio),
+                 1, config.creature_count - 1);
+
+  for (int i = 0; i < config.creature_count; ++i) {
+    Creature c;
+    c.species = RandomSpecies();
+    c.is_cryptid = i < cryptidCount;
+
+    if (!c.is_cryptid) {
+      c.appearance = AppearanceTier::Standard;
+      c.behaves_normally = true;
+    } else {
+      c.appearance = RollAppearanceTier(config);
+      float lieChance = IncorrectBehaviourChance(c.appearance);
+      float roll = (float)GetRandomValue(0, 10000) / 10000.0f;
+      c.behaves_normally = !(roll < lieChance);
+    }
+
+    round.creatures.push_back(c);
+  }
+
+  // Shuffle so cryptids aren't all front-loaded.
+  for (int i = (int)round.creatures.size() - 1; i > 0; --i) {
+    int j = GetRandomValue(0, i);
+    std::swap(round.creatures[i], round.creatures[j]);
+  }
+
+  return round;
+}
+
+bool FeedCurrentCreature(Round &round) {
+  Creature *c = round.CurrentCreature();
+  if (!c || c->has_been_fed || round.marshmallowsRemaining <= 0)
+    return false;
+
+  c->has_been_fed = true;
+  c->observed_reaction = true;
+  round.marshmallowsRemaining--;
+  return true;
+}
+
+bool ResolveCurrentCreature(Round &round, bool captured) {
+  Creature *c = round.CurrentCreature();
+  if (!c)
+    return false;
+
+  c->captured = captured;
+  c->resolved = true;
+
+  bool died = false;
+  if (!captured && c->is_cryptid) {
+    died = true; // let a real cryptid go — run over
+  } else if (captured && !c->is_cryptid) {
+    round.miscaptures++;
+  }
+
+  round.currentIndex++;
+  return died;
+}
+
+bool Round::IsComplete() const { return currentIndex >= (int)creatures.size(); }
+
+Creature *Round::CurrentCreature() {
+  if (IsComplete())
+    return nullptr;
+  return &creatures[currentIndex];
+}
+
+float Round::SuccessRate() const {
+  if (conf.creature_count == 0)
+    return 1.0f;
+  return 1.0f - (float)miscaptures / (float)conf.creature_count;
+}
+
+bool Round::Passed() const { return SuccessRate() >= 0.8f; }