trenches/src/player_anim_tree.cpp

#include "player_anim_tree.hpp"
#include "utils/godot_macros.hpp"
#include <godot_cpp/variant/utility_functions.hpp>

void PlayerAnimTree::_bind_methods() {
#define CLASSNAME PlayerAnimTree
    GDPROPERTY(target_turn_speed, gd::Variant::FLOAT);
    GDPROPERTY(is_walking, gd::Variant::BOOL);
    GDPROPERTY(walk_speed, gd::Variant::FLOAT);
    GDPROPERTY(lock_running, gd::Variant::BOOL);
    GDFUNCTION(get_is_running);
    GDPROPERTY(aim_weapon, gd::Variant::BOOL);
    GDFUNCTION(get_fire_weapon);
    GDFUNCTION(get_stab);
}

void PlayerAnimTree::_ready() {
    this->parent_3d = gd::Object::cast_to<gd::Node3D>(this->get_parent());
    this->fsm = this->get("parameters/Actions/playback");
}

void PlayerAnimTree::_process(double delta) {
    if(gd::Engine::get_singleton()->is_editor_hint())
        return;
    // update timers
    this->fire_weapon -= delta;
    this->stab -= delta;
    this->running_time -= delta;
    // increase death counter
    if(this->is_dead && this->death_blend < 1.f) {
        this->death_blend = gd::Math::min(this->death_blend + float(delta * this->DEATH_BLEND_SPEED), 1.f);
        this->set("parameters/DeathBlend/blend_amount", this->death_blend);
    }
    // turn speed smoothing
    if(this->match_tags(Tags::Turn)) {
        this->turn_speed = gd::Math::move_toward(this->turn_speed, this->target_turn_speed, float(delta * 20.));
        this->commit_turn_speed();
    }
    // rotational root motion
    this->parent_3d->set_quaternion(this->get_root_motion_rotation_accumulator());
    this->parent_3d->rotate_y(M_PIf);
    this->update_tags(this->fsm->get_current_node());
}

void PlayerAnimTree::set_target_turn_speed(float value) {
    this->target_turn_speed = gd::Math::clamp(value, -1.f, 1.f);
}

float PlayerAnimTree::get_target_turn_speed() const {
    return this->target_turn_speed;
}

void PlayerAnimTree::set_is_walking(bool value) {
    this->is_walking = value;
}

bool PlayerAnimTree::get_is_walking() const {
    return this->is_walking;
}

void PlayerAnimTree::set_walk_speed(float value) {
    this->walk_speed = value;
    this->commit_walk_speed();
}

float PlayerAnimTree::get_walk_speed() const {
    return this->walk_speed;
}

void PlayerAnimTree::set_lock_running(bool value) {
    this->lock_running = value;
    this->commit_walk_speed();
}

bool PlayerAnimTree::get_lock_running() const {
    return this->lock_running;
}

void PlayerAnimTree::set_is_running() {
    this->running_time = this->RUN_PARAM_DECAY;
}

bool PlayerAnimTree::get_is_running() const {
    return this->lock_running || (this->running_time > 0.0 && this->get_is_walking());
}

void PlayerAnimTree::set_aim_weapon(bool value) {
    this->aim_weapon = value;
}

bool PlayerAnimTree::get_aim_weapon() const {
    return this->aim_weapon;
}

void PlayerAnimTree::set_fire_weapon() {
    this->fire_weapon = this->BUTTON_PARAM_DECAY;
}

bool PlayerAnimTree::get_fire_weapon() {
    bool const is_set{this->fire_weapon > 0.0};
    this->fire_weapon = 0.0;
    return is_set;
}

void PlayerAnimTree::set_stab() {
    this->stab = this->BUTTON_PARAM_DECAY;
}

bool PlayerAnimTree::get_stab() {
    bool const is_set{this->stab > 0.0};
    this->stab = 0.0;
    return is_set;
}

void PlayerAnimTree::hit_animation() {
    this->fsm->start("Hit", true);
}

void PlayerAnimTree::death_animation() {
    this->set("parameters/DeathSeek/request", 0.f);
    this->is_dead = true;
}

bool PlayerAnimTree::match_tags(Tags tags) const {
    return (this->current_tags & tags) != Tags::None;
}

gd::StringName const &PlayerAnimTree::get_current_state() const {
    return this->last_known_anim;
}

void PlayerAnimTree::update_tags(gd::StringName const &anim) {
    if(anim != this->last_known_anim && this->fsm->get_travel_path().size() <= 1) {
        this->last_known_anim = anim;
        this->current_tags = Tags::None;
        if(anim.contains("[turn]"))
            this->current_tags = Tags(this->current_tags | Tags::Turn);
        else
            this->turn_speed = 0.f;
        if(anim.contains("[aim]"))
            this->current_tags = Tags(this->current_tags | Tags::Aim);
    }
}

void PlayerAnimTree::commit_turn_speed() {
    this->set("parameters/Actions/Stationary [turn]/Turn/blend_position", gd::Math::abs(this->turn_speed)*this->turn_speed);
}

void PlayerAnimTree::commit_walk_speed() {
    float const true_speed{this->lock_running ? 1.f : this->walk_speed};
    this->set("parameters/Actions/Walk [turn]/Speed/blend_amount", true_speed);
    this->set("parameters/Actions/Run/Speed/blend_amount", true_speed);
}