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filehelios/engine/runtime/spawn/policy/conditions/_module.ixx

Aggregate module for helios::engine::runtime::spawn::policy::conditions namespace. More...

fileRequestedAmountIsAvailableCondition.ixx

Spawn condition checking pool availability for requested amount. More...

fileTimerSpawnCondition.ixx

Time-based spawn condition for interval-controlled spawning. More...

Description​

helios::engine::runtime::spawn::policy::conditions​

Spawn conditions for controlling spawn timing.

Overview​

This module provides SpawnCondition implementations that determine when spawning should occur based on time, triggers, or other game state.

Key Classes​

ClassPurpose
TimerSpawnConditionTriggers spawning at fixed time intervals

Usage​

 // Spawn every 2 seconds
 auto condition = std::make_unique<TimerSpawnCondition>(2.0f);
 
 // Use with SpawnRule
 auto rule = std::make_unique<SpawnRule>(
  std::move(condition),
  std::make_unique<FixedSpawnAmount>(3),
  SpawnRuleId{1}
 );
 
 // Add to scheduler
 scheduler.addRule(enemyProfileId, std::move(rule));

Implementing Custom Conditions​

 class WaveSpawnCondition : public SpawnCondition {
 public:
  bool isSatisfied(size_t amount, const SpawnRuleState& state,
  const GameObjectPoolSnapshot& pool,
  const UpdateContext& ctx) const override {
  // Spawn when wave timer expires and pool has capacity
  return state.sinceLastSpawn() >= waveInterval_
  && pool.inactiveCount >= amount;
  }
 
  void onCommit(SpawnRuleState& state, size_t count) const override {
  state.setSinceLastSpawn(0.0f); // Reset timer
  }
 };

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