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/*************************************************************************/
/* animation_node_state_machine.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef ANIMATION_NODE_STATE_MACHINE_H
#define ANIMATION_NODE_STATE_MACHINE_H
#include "core/math/expression.h"
#include "scene/animation/animation_tree.h"
class AnimationNodeStateMachineTransition : public Resource {
GDCLASS(AnimationNodeStateMachineTransition, Resource);
public:
enum SwitchMode {
SWITCH_MODE_IMMEDIATE,
SWITCH_MODE_SYNC,
SWITCH_MODE_AT_END,
};
private:
SwitchMode switch_mode = SWITCH_MODE_IMMEDIATE;
bool auto_advance = false;
StringName advance_condition;
StringName advance_condition_name;
float xfade_time = 0.0;
Ref<Curve> xfade_curve;
bool disabled = false;
int priority = 1;
String advance_expression;
NodePath advance_expression_base_node;
friend class AnimationNodeStateMachinePlayback;
Ref<Expression> expression;
protected:
static void _bind_methods();
public:
void set_switch_mode(SwitchMode p_mode);
SwitchMode get_switch_mode() const;
void set_auto_advance(bool p_enable);
bool has_auto_advance() const;
void set_advance_condition(const StringName &p_condition);
StringName get_advance_condition() const;
StringName get_advance_condition_name() const;
void set_advance_expression(const String &p_expression);
String get_advance_expression() const;
void set_advance_expression_base_node(const NodePath &p_expression_base_node);
NodePath get_advance_expression_base_node() const;
void set_xfade_time(float p_xfade);
float get_xfade_time() const;
void set_xfade_curve(const Ref<Curve> &p_curve);
Ref<Curve> get_xfade_curve() const;
void set_disabled(bool p_disabled);
bool is_disabled() const;
void set_priority(int p_priority);
int get_priority() const;
AnimationNodeStateMachineTransition();
};
VARIANT_ENUM_CAST(AnimationNodeStateMachineTransition::SwitchMode)
class AnimationNodeStateMachine;
class AnimationNodeStateMachinePlayback : public Resource {
GDCLASS(AnimationNodeStateMachinePlayback, Resource);
friend class AnimationNodeStateMachine;
struct AStarCost {
float distance = 0.0;
StringName prev;
};
struct Transition {
StringName from;
StringName to;
StringName next;
};
float len_current = 0.0;
float pos_current = 0.0;
bool end_loop = false;
StringName current;
Transition current_transition;
Ref<Curve> current_curve;
bool force_auto_advance = false;
StringName fading_from;
float fading_time = 0.0;
float fading_pos = 0.0;
Vector<StringName> path;
bool playing = false;
StringName start_request;
bool start_request_travel = false;
bool stop_request = false;
bool _travel(AnimationNodeStateMachine *p_state_machine, const StringName &p_travel);
double process(AnimationNodeStateMachine *p_state_machine, double p_time, bool p_seek, bool p_seek_root);
bool _check_advance_condition(const Ref<AnimationNodeStateMachine> p_state_machine, const Ref<AnimationNodeStateMachineTransition> p_transition) const;
protected:
static void _bind_methods();
public:
void travel(const StringName &p_state);
void start(const StringName &p_state);
void stop();
bool is_playing() const;
StringName get_current_node() const;
StringName get_blend_from_node() const;
Vector<StringName> get_travel_path() const;
float get_current_play_pos() const;
float get_current_length() const;
AnimationNodeStateMachinePlayback();
};
class AnimationNodeStateMachine : public AnimationRootNode {
GDCLASS(AnimationNodeStateMachine, AnimationRootNode);
private:
friend class AnimationNodeStateMachinePlayback;
struct State {
Ref<AnimationRootNode> node;
Vector2 position;
};
HashMap<StringName, State> states;
struct Transition {
StringName from;
StringName to;
StringName local_from;
StringName local_to;
Ref<AnimationNodeStateMachineTransition> transition;
};
Vector<Transition> transitions;
StringName playback = "playback";
StringName state_machine_name;
AnimationNodeStateMachine *prev_state_machine = nullptr;
bool updating_transitions = false;
Vector2 graph_offset;
void _tree_changed();
void _remove_transition(const Ref<AnimationNodeStateMachineTransition> p_transition);
void _rename_transitions(const StringName &p_name, const StringName &p_new_name);
bool _can_connect(const StringName &p_name, Vector<AnimationNodeStateMachine *> p_parents = Vector<AnimationNodeStateMachine *>());
StringName _get_shortest_path(const StringName &p_path) const;
protected:
static void _bind_methods();
bool _set(const StringName &p_name, const Variant &p_value);
bool _get(const StringName &p_name, Variant &r_ret) const;
void _get_property_list(List<PropertyInfo> *p_list) const;
bool _check_advance_condition(const Ref<AnimationNodeStateMachine> p_state_machine, const Ref<AnimationNodeStateMachineTransition> p_transition) const;
virtual void reset_state() override;
public:
StringName start_node = "Start";
StringName end_node = "End";
virtual void get_parameter_list(List<PropertyInfo> *r_list) const override;
virtual Variant get_parameter_default_value(const StringName &p_parameter) const override;
void add_node(const StringName &p_name, Ref<AnimationNode> p_node, const Vector2 &p_position = Vector2());
void replace_node(const StringName &p_name, Ref<AnimationNode> p_node);
Ref<AnimationNode> get_node(const StringName &p_name) const;
void remove_node(const StringName &p_name);
void rename_node(const StringName &p_name, const StringName &p_new_name);
bool has_node(const StringName &p_name) const;
StringName get_node_name(const Ref<AnimationNode> &p_node) const;
void get_node_list(List<StringName> *r_nodes) const;
void set_node_position(const StringName &p_name, const Vector2 &p_position);
Vector2 get_node_position(const StringName &p_name) const;
virtual void get_child_nodes(List<ChildNode> *r_child_nodes) override;
bool has_transition(const StringName &p_from, const StringName &p_to) const;
bool has_local_transition(const StringName &p_from, const StringName &p_to) const;
int find_transition(const StringName &p_from, const StringName &p_to) const;
void add_transition(const StringName &p_from, const StringName &p_to, const Ref<AnimationNodeStateMachineTransition> &p_transition);
Ref<AnimationNodeStateMachineTransition> get_transition(int p_transition) const;
StringName get_transition_from(int p_transition) const;
StringName get_transition_to(int p_transition) const;
int get_transition_count() const;
void remove_transition_by_index(const int p_transition);
void remove_transition(const StringName &p_from, const StringName &p_to);
bool can_edit_node(const StringName &p_name) const;
AnimationNodeStateMachine *get_prev_state_machine() const;
void set_graph_offset(const Vector2 &p_offset);
Vector2 get_graph_offset() const;
virtual double process(double p_time, bool p_seek, bool p_seek_root) override;
virtual String get_caption() const override;
virtual Ref<AnimationNode> get_child_by_name(const StringName &p_name) override;
AnimationNodeStateMachine();
};
#endif // ANIMATION_NODE_STATE_MACHINE_H
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