81 lines
2.5 KiB
C++
81 lines
2.5 KiB
C++
/**
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* limbo_hsm.h
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* =============================================================================
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* Copyright 2021-2024 Serhii Snitsaruk
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*
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* Use of this source code is governed by an MIT-style
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* license that can be found in the LICENSE file or at
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* https://opensource.org/licenses/MIT.
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* =============================================================================
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*/
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#ifndef LIMBO_HSM_H
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#define LIMBO_HSM_H
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#include "limbo_state.h"
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class LimboHSM : public LimboState {
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GDCLASS(LimboHSM, LimboState);
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public:
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enum UpdateMode : unsigned int {
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IDLE, // automatically call update() during NOTIFICATION_PROCESS
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PHYSICS, // automatically call update() during NOTIFICATION_PHYSICS
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MANUAL, // manually update state machine: user must call update(delta)
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};
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private:
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UpdateMode update_mode;
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LimboState *initial_state;
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LimboState *active_state;
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LimboState *previous_active;
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LimboState *next_active;
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HashMap<uint64_t, LimboState *> transitions;
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bool updating = false;
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_FORCE_INLINE_ uint64_t _get_transition_key(LimboState *p_from_state, const StringName &p_event) {
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uint64_t key = hash_djb2_one_64(Variant::OBJECT);
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if (p_from_state != nullptr) {
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key = hash_djb2_one_64(hash_one_uint64(hash_make_uint64_t(p_from_state)), key);
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}
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key = hash_djb2_one_64(p_event.hash(), key);
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return key;
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}
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protected:
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static void _bind_methods();
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void _notification(int p_what);
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virtual void _initialize(Node *p_agent, const Ref<Blackboard> &p_blackboard) override;
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virtual bool _dispatch(const StringName &p_event, const Variant &p_cargo = Variant()) override;
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virtual void _enter() override;
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virtual void _exit() override;
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virtual void _update(double p_delta) override;
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void _change_state(LimboState *p_state);
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public:
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void set_update_mode(UpdateMode p_mode) { update_mode = p_mode; }
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UpdateMode get_update_mode() const { return update_mode; }
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LimboState *get_active_state() const { return active_state; }
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LimboState *get_previous_active_state() const { return previous_active; }
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LimboState *get_leaf_state() const;
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void set_active(bool p_active);
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void set_initial_state(LimboState *p_state);
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LimboState *get_initial_state() const { return initial_state; }
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virtual void initialize(Node *p_agent, const Ref<Blackboard> &p_parent_scope = nullptr);
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void update(double p_delta);
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void add_transition(LimboState *p_from_state, LimboState *p_to_state, const StringName &p_event);
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LimboState *anystate() const { return nullptr; }
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LimboHSM();
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};
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#endif // LIMBO_HSM_H
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