veloren_common/states/
repeater_ranged.rs

1use crate::{
2    combat::{self, CombatEffect},
3    comp::{
4        Body, CharacterState, LightEmitter, Pos, ProjectileConstructor, StateUpdate,
5        character_state::OutputEvents,
6    },
7    event::{EnergyChangeEvent, ShootEvent},
8    states::{
9        behavior::{CharacterBehavior, JoinData},
10        utils::{StageSection, *},
11    },
12    util::Dir,
13};
14use rand::{Rng, thread_rng};
15use serde::{Deserialize, Serialize};
16use std::{f32::consts::TAU, time::Duration};
17
18#[derive(Clone, Copy, Debug, PartialEq, Serialize, Deserialize)]
19/// Separated out to condense update portions of character state
20pub struct StaticData {
21    /// How long we've readied the weapon
22    pub buildup_duration: Duration,
23    /// How long the state is shooting
24    pub shoot_duration: Duration,
25    /// How long the state has until exiting
26    pub recover_duration: Duration,
27    /// Energy cost per projectile
28    pub energy_cost: f32,
29    /// Max speed that can be reached
30    pub max_speed: f32,
31    /// Projectiles required to reach half of max speed
32    pub half_speed_at: u32,
33    /// Projectile options
34    pub projectile: ProjectileConstructor,
35    pub projectile_body: Body,
36    pub projectile_light: Option<LightEmitter>,
37    pub projectile_speed: f32,
38    /// What key is used to press ability
39    pub ability_info: AbilityInfo,
40    /// Adds an effect onto the main damage of the attack
41    pub damage_effect: Option<CombatEffect>,
42    /// Whether ablity should be casted from above as aoe or shoot projectiles
43    /// as normal
44    pub properties_of_aoe: Option<ProjectileOffset>,
45    /// Used to specify the attack to the frontend
46    pub specifier: Option<FrontendSpecifier>,
47}
48
49#[derive(Clone, Copy, Debug, PartialEq, Serialize, Deserialize)]
50pub struct ProjectileOffset {
51    /// Radius of AOE
52    pub radius: f32,
53    /// Height of shooting point for AOE's projectiles
54    pub height: f32,
55}
56
57#[derive(Clone, Debug, PartialEq, Serialize, Deserialize)]
58pub struct Data {
59    /// Struct containing data that does not change over the course of the
60    /// character state
61    pub static_data: StaticData,
62    /// Timer for each stage
63    pub timer: Duration,
64    /// What section the character stage is in
65    pub stage_section: StageSection,
66    /// Speed of the state while in shoot section
67    pub speed: f32,
68    /// Number of projectiles fired so far
69    pub projectiles_fired: u32,
70}
71
72impl CharacterBehavior for Data {
73    fn behavior(&self, data: &JoinData, output_events: &mut OutputEvents) -> StateUpdate {
74        let mut update = StateUpdate::from(data);
75        handle_orientation(data, &mut update, 1.0, None);
76        handle_move(data, &mut update, 0.3);
77
78        match self.stage_section {
79            StageSection::Buildup => {
80                if self.timer < self.static_data.buildup_duration {
81                    // Buildup to attack
82                    update.character = CharacterState::RepeaterRanged(Data {
83                        timer: tick_attack_or_default(data, self.timer, None),
84                        ..*self
85                    });
86                } else {
87                    // Transition to shoot
88                    update.character = CharacterState::RepeaterRanged(Data {
89                        timer: Duration::default(),
90                        stage_section: StageSection::Action,
91                        ..*self
92                    });
93                }
94            },
95            StageSection::Action => {
96                if self.timer < self.static_data.shoot_duration {
97                    // Draw projectile
98                    update.character = CharacterState::RepeaterRanged(Data {
99                        timer: self
100                            .timer
101                            .checked_add(Duration::from_secs_f32(data.dt.0 * self.speed))
102                            .unwrap_or_default(),
103                        ..*self
104                    });
105                } else if input_is_pressed(data, self.static_data.ability_info.input)
106                    && update.energy.current() >= self.static_data.energy_cost
107                {
108                    // Fire if input is pressed still
109                    let precision_mult = combat::compute_precision_mult(data.inventory, data.msm);
110                    // Gets offsets
111                    let pos: Pos = self.static_data.properties_of_aoe.as_ref().map_or_else(
112                        || {
113                            // Default position
114                            let body_offsets = data.body.projectile_offsets(
115                                update.ori.look_vec(),
116                                data.scale.map_or(1.0, |s| s.0),
117                            );
118                            Pos(data.pos.0 + body_offsets)
119                        },
120                        |aoe_data| {
121                            // Position calculated from aoe_data
122                            let rand_pos = {
123                                let mut rng = thread_rng();
124                                let theta = rng.gen::<f32>() * TAU;
125                                let radius = aoe_data.radius * rng.gen::<f32>().sqrt();
126                                let x = radius * theta.sin();
127                                let y = radius * theta.cos();
128                                vek::Vec2::new(x, y)
129                            };
130                            Pos(data.pos.0 + rand_pos.with_z(aoe_data.height))
131                        },
132                    );
133
134                    let direction: Dir = if self.static_data.properties_of_aoe.is_some() {
135                        Dir::down()
136                    } else {
137                        data.inputs.look_dir
138                    };
139
140                    let projectile = self.static_data.projectile.create_projectile(
141                        Some(*data.uid),
142                        precision_mult,
143                        self.static_data.damage_effect,
144                    );
145                    output_events.emit_server(ShootEvent {
146                        entity: data.entity,
147                        pos,
148                        dir: direction,
149                        body: self.static_data.projectile_body,
150                        projectile,
151                        light: self.static_data.projectile_light,
152                        speed: self.static_data.projectile_speed,
153                        object: None,
154                    });
155
156                    // Removes energy from character when arrow is fired
157                    output_events.emit_server(EnergyChangeEvent {
158                        entity: data.entity,
159                        change: -self.static_data.energy_cost,
160                        reset_rate: false,
161                    });
162
163                    // Sets new speed of shoot. Scales based off of the number of projectiles fired.
164                    let new_speed = 1.0
165                        + self.projectiles_fired as f32
166                            / (self.static_data.half_speed_at as f32
167                                + self.projectiles_fired as f32)
168                            * self.static_data.max_speed;
169
170                    update.character = CharacterState::RepeaterRanged(Data {
171                        timer: Duration::default(),
172                        speed: new_speed,
173                        projectiles_fired: self.projectiles_fired + 1,
174                        ..*self
175                    });
176                } else {
177                    // Transition to recover
178                    update.character = CharacterState::RepeaterRanged(Data {
179                        timer: Duration::default(),
180                        stage_section: StageSection::Recover,
181                        ..*self
182                    });
183                }
184            },
185            StageSection::Recover => {
186                if self.timer < self.static_data.recover_duration {
187                    // Recover from attack
188                    update.character = CharacterState::RepeaterRanged(Data {
189                        timer: tick_attack_or_default(
190                            data,
191                            self.timer,
192                            Some(data.stats.recovery_speed_modifier),
193                        ),
194                        ..*self
195                    });
196                } else {
197                    // Done
198                    end_ability(data, &mut update);
199                }
200            },
201            _ => {
202                // If it somehow ends up in an incorrect stage section
203                end_ability(data, &mut update);
204            },
205        }
206
207        // At end of state logic so an interrupt isn't overwritten
208        handle_interrupts(data, &mut update, output_events);
209
210        update
211    }
212}
213
214#[derive(Copy, Clone, Debug, Serialize, Deserialize, PartialEq, Eq)]
215pub enum FrontendSpecifier {
216    FireRain,
217}
veloren_common/states/repeater_ranged.rs

veloren_common/states/
repeater_ranged.rs
