75a8606b83
Allows specifying an expression as a condition for state machine transitions. This gives much greater flexibility for creating complex state machines. By directly interfacing with the script code, it is possible to create complex animation advance condition for switching between states. Ensure assigning AnimationTreeStateMachineTransition base expression node in editor is relative to current AnimationTree node. Allow setting an expression base node on the AnimationTree itself. Co-Authored-By: reduz <reduzio@gmail.com>
250 lines
8.8 KiB
C++
250 lines
8.8 KiB
C++
/*************************************************************************/
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/* animation_node_state_machine.h */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/*************************************************************************/
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#ifndef ANIMATION_NODE_STATE_MACHINE_H
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#define ANIMATION_NODE_STATE_MACHINE_H
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#include "core/math/expression.h"
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#include "scene/animation/animation_tree.h"
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class AnimationNodeStateMachineTransition : public Resource {
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GDCLASS(AnimationNodeStateMachineTransition, Resource);
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public:
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enum SwitchMode {
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SWITCH_MODE_IMMEDIATE,
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SWITCH_MODE_SYNC,
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SWITCH_MODE_AT_END,
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};
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private:
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SwitchMode switch_mode = SWITCH_MODE_IMMEDIATE;
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bool auto_advance = false;
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StringName advance_condition;
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StringName advance_condition_name;
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float xfade = 0.0;
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bool disabled = false;
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int priority = 1;
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String advance_expression;
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NodePath advance_expression_base_node;
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friend class AnimationNodeStateMachinePlayback;
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Ref<Expression> expression;
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protected:
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static void _bind_methods();
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public:
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void set_switch_mode(SwitchMode p_mode);
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SwitchMode get_switch_mode() const;
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void set_auto_advance(bool p_enable);
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bool has_auto_advance() const;
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void set_advance_condition(const StringName &p_condition);
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StringName get_advance_condition() const;
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StringName get_advance_condition_name() const;
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void set_advance_expression(const String &p_expression);
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String get_advance_expression() const;
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void set_advance_expression_base_node(const NodePath &p_expression_base_node);
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NodePath get_advance_expression_base_node() const;
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void set_xfade_time(float p_xfade);
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float get_xfade_time() const;
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void set_disabled(bool p_disabled);
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bool is_disabled() const;
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void set_priority(int p_priority);
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int get_priority() const;
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AnimationNodeStateMachineTransition();
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};
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VARIANT_ENUM_CAST(AnimationNodeStateMachineTransition::SwitchMode)
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class AnimationNodeStateMachine;
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class AnimationNodeStateMachinePlayback : public Resource {
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GDCLASS(AnimationNodeStateMachinePlayback, Resource);
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friend class AnimationNodeStateMachine;
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struct AStarCost {
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float distance = 0.0;
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StringName prev;
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};
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struct Transition {
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StringName from;
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StringName to;
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StringName next;
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};
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float len_current = 0.0;
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float pos_current = 0.0;
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bool end_loop = false;
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StringName current;
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Transition current_transition;
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bool force_auto_advance = false;
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StringName fading_from;
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float fading_time = 0.0;
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float fading_pos = 0.0;
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Vector<StringName> path;
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bool playing = false;
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StringName start_request;
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bool start_request_travel = false;
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bool stop_request = false;
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bool _travel(AnimationNodeStateMachine *p_state_machine, const StringName &p_travel);
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double process(AnimationNodeStateMachine *p_state_machine, double p_time, bool p_seek, bool p_seek_root);
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bool _check_advance_condition(const Ref<AnimationNodeStateMachine> p_state_machine, const Ref<AnimationNodeStateMachineTransition> p_transition) const;
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protected:
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static void _bind_methods();
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public:
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void travel(const StringName &p_state);
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void start(const StringName &p_state);
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void stop();
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bool is_playing() const;
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StringName get_current_node() const;
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StringName get_blend_from_node() const;
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Vector<StringName> get_travel_path() const;
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float get_current_play_pos() const;
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float get_current_length() const;
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AnimationNodeStateMachinePlayback();
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};
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class AnimationNodeStateMachine : public AnimationRootNode {
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GDCLASS(AnimationNodeStateMachine, AnimationRootNode);
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private:
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friend class AnimationNodeStateMachinePlayback;
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struct State {
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Ref<AnimationRootNode> node;
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Vector2 position;
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};
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HashMap<StringName, State> states;
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struct Transition {
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StringName from;
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StringName to;
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StringName local_from;
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StringName local_to;
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Ref<AnimationNodeStateMachineTransition> transition;
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};
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Vector<Transition> transitions;
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StringName playback = "playback";
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StringName state_machine_name;
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AnimationNodeStateMachine *prev_state_machine = nullptr;
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bool updating_transitions = false;
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Vector2 graph_offset;
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void _tree_changed();
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void _remove_transition(const Ref<AnimationNodeStateMachineTransition> p_transition);
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void _rename_transition(const StringName &p_name, const StringName &p_new_name);
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bool _can_connect(const StringName &p_name, Vector<AnimationNodeStateMachine *> p_parents = Vector<AnimationNodeStateMachine *>());
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StringName _get_shortest_path(const StringName &p_path) const;
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protected:
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static void _bind_methods();
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bool _set(const StringName &p_name, const Variant &p_value);
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bool _get(const StringName &p_name, Variant &r_ret) const;
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void _get_property_list(List<PropertyInfo> *p_list) const;
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bool _check_advance_condition(const Ref<AnimationNodeStateMachine> p_state_machine, const Ref<AnimationNodeStateMachineTransition> p_transition) const;
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virtual void reset_state() override;
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public:
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StringName start_node = "Start";
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StringName end_node = "End";
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virtual void get_parameter_list(List<PropertyInfo> *r_list) const override;
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virtual Variant get_parameter_default_value(const StringName &p_parameter) const override;
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void add_node(const StringName &p_name, Ref<AnimationNode> p_node, const Vector2 &p_position = Vector2());
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void replace_node(const StringName &p_name, Ref<AnimationNode> p_node);
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Ref<AnimationNode> get_node(const StringName &p_name) const;
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void remove_node(const StringName &p_name);
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void rename_node(const StringName &p_name, const StringName &p_new_name);
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bool has_node(const StringName &p_name) const;
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StringName get_node_name(const Ref<AnimationNode> &p_node) const;
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void get_node_list(List<StringName> *r_nodes) const;
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void set_node_position(const StringName &p_name, const Vector2 &p_position);
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Vector2 get_node_position(const StringName &p_name) const;
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virtual void get_child_nodes(List<ChildNode> *r_child_nodes) override;
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bool has_transition(const StringName &p_from, const StringName &p_to) const;
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bool has_local_transition(const StringName &p_from, const StringName &p_to) const;
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int find_transition(const StringName &p_from, const StringName &p_to) const;
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void add_transition(const StringName &p_from, const StringName &p_to, const Ref<AnimationNodeStateMachineTransition> &p_transition);
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Ref<AnimationNodeStateMachineTransition> get_transition(int p_transition) const;
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StringName get_transition_from(int p_transition) const;
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StringName get_transition_to(int p_transition) const;
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int get_transition_count() const;
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void remove_transition_by_index(const int p_transition);
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void remove_transition(const StringName &p_from, const StringName &p_to);
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bool can_edit_node(const StringName &p_name) const;
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AnimationNodeStateMachine *get_prev_state_machine() const;
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void set_graph_offset(const Vector2 &p_offset);
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Vector2 get_graph_offset() const;
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virtual double process(double p_time, bool p_seek, bool p_seek_root) override;
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virtual String get_caption() const override;
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virtual Ref<AnimationNode> get_child_by_name(const StringName &p_name) override;
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AnimationNodeStateMachine();
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};
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#endif // ANIMATION_NODE_STATE_MACHINE_H
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