outfly/src/commands.rs

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// This plugin loads "defs.txt" and applies the therein contained commands
extern crate regex;
use bevy::prelude::*;
use bevy_xpbd_3d::prelude::*;
use bevy::math::DVec3;
use crate::{actor, chat, hud, nature, world};
use regex::Regex;
use std::f32::consts::PI;
use std::f64::consts::PI as PI64;
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use std::collections::HashMap;
pub struct CommandsPlugin;
impl Plugin for CommandsPlugin {
fn build(&self, app: &mut App) {
app.add_systems(Startup, load_defs);
app.add_systems(Update, spawn_entities);
app.add_event::<SpawnEvent>();
}
}
#[derive(Event)] pub struct SpawnEvent(ParserState);
#[derive(PartialEq, Clone)]
enum DefClass {
Actor,
None,
}
#[derive(Clone)]
struct ParserState {
class: DefClass,
// Generic fields
name: Option<String>,
chat: String,
// Actor fields
id: String,
pos: DVec3,
model: String,
model_scale: f32,
rotation: Quat,
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velocity: DVec3,
angular_momentum: DVec3,
pronoun: String,
is_sphere: bool,
is_player: bool,
is_lifeform: bool,
is_alive: bool,
is_suited: bool,
is_vehicle: bool,
is_clickable: bool,
has_physics: bool,
wants_maxrotation: Option<f64>,
wants_maxvelocity: Option<f64>,
collider_is_mesh: bool,
thrust_forward: f32,
thrust_sideways: f32,
thrust_back: f32,
reaction_wheels: f32,
warmup_seconds: f32,
engine_type: actor::EngineType,
oxygen: f32,
density: f64,
collider: Collider,
camdistance: f32,
suit_integrity: f32,
light_brightness: f32,
light_color: Option<Color>,
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ar_model: Option<String>,
}
impl Default for ParserState {
fn default() -> Self {
let default_actor = actor::Actor::default();
let default_engine = actor::Engine::default();
Self {
class: DefClass::None,
name: None,
chat: "".to_string(),
id: "".to_string(),
pos: DVec3::new(0.0, 0.0, 0.0),
model: "".to_string(),
model_scale: 1.0,
rotation: Quat::IDENTITY,
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velocity: DVec3::splat(0.0),
angular_momentum: DVec3::new(0.03, 0.3, 0.09),
pronoun: "they/them".to_string(),
is_sphere: false,
is_player: false,
is_lifeform: false,
is_alive: false,
is_suited: false,
is_vehicle: false,
is_clickable: true,
has_physics: true,
wants_maxrotation: None,
wants_maxvelocity: None,
collider_is_mesh: false,
thrust_forward: default_engine.thrust_forward,
thrust_sideways: default_engine.thrust_forward,
thrust_back: default_engine.thrust_back,
reaction_wheels: default_engine.reaction_wheels,
warmup_seconds: default_engine.warmup_seconds,
engine_type: default_engine.engine_type,
oxygen: nature::OXY_D,
density: 100.0,
collider: Collider::sphere(1.0),
camdistance: default_actor.camdistance,
suit_integrity: 1.0,
light_brightness: 0.0,
light_color: None,
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ar_model: None,
}
}
}
pub fn load_defs(
mut ew_spawn: EventWriter<SpawnEvent>,
) {
let re1 = Regex::new(r"^\s*([a-z_-]+)\s+(.*)$").unwrap();
let re2 = Regex::new("\"([^\"]*)\"|(-?[0-9]+[0-9e-]*(?:\\.[0-9e-]+)?)|([a-zA-Z_-][a-zA-Z0-9_-]*)").unwrap();
let defs_string = include_str!("defs.txt");
let mut lines = defs_string.lines();
let mut state = ParserState::default();
let mut command;
let mut parameters;
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let mut id2pos: HashMap<String, DVec3> = HashMap::new();
let mut line_nr = -1;
while let Some(line) = lines.next() {
line_nr += 1;
let caps = re1.captures(line);
if caps.is_none() {
if line.trim() != "" {
error!("Syntax Error in definitions line {}: `{}`", line_nr, line);
}
continue;
}
if let Some(caps) = caps {
command = caps.get(1).unwrap().as_str();
parameters = caps.get(2).unwrap().as_str();
}
else {
error!("Failed to read regex captures in line {}: `{}`", line_nr, line);
continue;
}
let mut parts: Vec<&str> = Vec::new();
parts.push(command);
for caps in re2.captures_iter(parameters) {
if let Some(part) = caps.get(1) {
parts.push(&part.as_str());
}
if let Some(part) = caps.get(2) {
parts.push(&part.as_str());
}
if let Some(part) = caps.get(3) {
parts.push(&part.as_str());
}
}
match parts.as_slice() {
["name", name] => {
debug!("Registering name: {}", name);
state.name = Some(name.to_string());
}
// Parsing actors
["actor", x, y, z, model] => {
ew_spawn.send(SpawnEvent(state));
state = ParserState::default();
state.class = DefClass::Actor;
state.model = model.to_string();
if let (Ok(x_float), Ok(y_float), Ok(z_float)) =
(x.parse::<f64>(), y.parse::<f64>(), z.parse::<f64>()) {
state.pos = DVec3::new(x_float, y_float, z_float);
}
else {
error!("Can't parse coordinates as floats in def: {line}");
state = ParserState::default();
continue;
}
}
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["relativeto", id] => {
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// NOTE: call this command before "id", otherwise actors that
// set their position relative to this actor will get the wrong offset
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match id2pos.get(&id.to_string()) {
Some(pos) => {
state.pos += *pos;
}
None => {
error!("Specified `relativeto` command but could not find id `{id}`");
continue;
}
}
}
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["orbit", radius_str, phase_str] => {
if let (Ok(r), Ok(phase)) = (radius_str.parse::<f64>(), phase_str.parse::<f64>()) {
let phase_deg = phase * PI64 * 2.0;
state.pos = DVec3::new(
state.pos.x + r * phase_deg.cos(),
state.pos.y,
state.pos.z + r * phase_deg.sin(),
);
}
else {
error!("Can't parse float: {line}");
continue;
}
}
["sphere", "yes"] => {
state.is_sphere = true;
}
["id", id] => {
state.id = id.to_string();
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id2pos.insert(state.id.clone(), state.pos.clone());
}
["alive", "yes"] => {
state.is_alive = true;
state.is_lifeform = true;
state.is_suited = true;
}
["vehicle", "yes"] => {
state.is_vehicle = true;
}
["clickable", "no"] => {
state.is_clickable = false;
}
["moon", "yes"] => {
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state.model_scale *= 3.0;
}
["oxygen", amount] => {
if let Ok(amount) = amount.parse::<f32>() {
state.is_lifeform = true;
state.is_suited = true;
state.oxygen = amount;
}
else {
error!("Can't parse float: {line}");
continue;
}
}
["pronoun", pronoun] => {
state.pronoun = pronoun.to_string();
}
["chatid", chat] => {
state.chat = chat.to_string();
}
["scale", scale] => {
if let Ok(scale_float) = scale.parse::<f32>() {
state.model_scale = scale_float;
}
else {
error!("Can't parse float: {line}");
continue;
}
}
["rotationx", rotation_x] => {
if let Ok(rotation_x_float) = rotation_x.parse::<f32>() {
state.rotation *= Quat::from_rotation_x(PI * rotation_x_float);
}
else {
error!("Can't parse float: {line}");
continue;
}
}
["rotationy", rotation_y] => {
if let Ok(rotation_y_float) = rotation_y.parse::<f32>() {
state.rotation *= Quat::from_rotation_y(PI * rotation_y_float);
}
else {
error!("Can't parse float: {line}");
continue;
}
}
["rotationz", rotation_z] => {
if let Ok(rotation_z_float) = rotation_z.parse::<f32>() {
state.rotation *= Quat::from_rotation_z(PI * rotation_z_float);
}
else {
error!("Can't parse float: {line}");
continue;
}
}
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["velocity", x, y, z] => {
if let (Ok(x_float), Ok(y_float), Ok(z_float)) =
(x.parse::<f64>(), y.parse::<f64>(), z.parse::<f64>()) {
state.velocity = DVec3::new(x_float, y_float, z_float);
}
else {
error!("Can't parse float: {line}");
continue;
}
}
["angularmomentum", x, y, z] => {
if let (Ok(x_float), Ok(y_float), Ok(z_float)) =
(x.parse::<f64>(), y.parse::<f64>(), z.parse::<f64>()) {
state.angular_momentum = DVec3::new(x_float, y_float, z_float);
}
else {
error!("Can't parse float: {line}");
continue;
}
}
["thrust", forward, back, sideways, reaction_wheels, warmup_time] => {
if let (Ok(forward_float), Ok(back_float), Ok(sideways_float), Ok(reaction_wheels_float), Ok(warmup_time_float)) = (forward.parse::<f32>(), back.parse::<f32>(), sideways.parse::<f32>(), reaction_wheels.parse::<f32>(), warmup_time.parse::<f32>()) {
state.thrust_forward = forward_float;
state.thrust_back = back_float;
state.thrust_sideways = sideways_float;
state.reaction_wheels = reaction_wheels_float;
state.warmup_seconds = warmup_time_float;
}
}
["engine", "rocket"] => {
state.engine_type = actor::EngineType::Rocket;
}
["engine", "ion"] => {
state.engine_type = actor::EngineType::Ion;
}
["engine", "monopropellant"] => {
state.engine_type = actor::EngineType::Monopropellant;
}
["health", value] => {
if let Ok(value_float) = value.parse::<f32>() {
state.suit_integrity = value_float;
}
else {
error!("Can't parse float: {line}");
continue;
}
}
["density", value] => {
if let Ok(value_float) = value.parse::<f64>() {
state.density = value_float;
}
else {
error!("Can't parse float: {line}");
continue;
}
}
["physics", "off"] => {
state.has_physics = false;
}
["collider", "sphere", radius] => {
if let Ok(radius_float) = radius.parse::<f64>() {
state.collider = Collider::sphere(radius_float);
}
else {
error!("Can't parse float: {line}");
continue;
}
}
["collider", "capsule", height, radius] => {
if let (Ok(height_float), Ok(radius_float)) = (height.parse::<f64>(), radius.parse::<f64>()) {
state.collider = Collider::capsule(height_float, radius_float);
}
else {
error!("Can't parse float: {line}");
continue;
}
}
["collider", "mesh"] => {
state.collider_is_mesh = true;
}
["player", "yes"] => {
state.is_player = true;
state.is_alive = true;
}
["camdistance", value] => {
if let Ok(value_float) = value.parse::<f32>() {
state.camdistance = value_float;
}
else {
error!("Can't parse float: {line}");
continue;
}
}
["light", color_hex, brightness] => {
if let Ok(brightness_float) = brightness.parse::<f32>() {
if let Ok(color) = Color::hex(color_hex) {
state.light_color = Some(color);
state.light_brightness = brightness_float;
}
else {
error!("Can't parse hexadecimal color code: {line}");
continue;
}
}
else {
error!("Can't parse float: {line}");
continue;
}
}
["wants", "maxrotation", value] => {
// NOTE: requires an engine to slow down velocity
if let Ok(value_float) = value.parse::<f64>() {
state.wants_maxrotation = Some(value_float);
}
else {
error!("Can't parse float: {line}");
continue;
}
}
["wants", "maxvelocity", value] => {
// NOTE: requires an engine to slow down velocity
if let Ok(value_float) = value.parse::<f64>() {
state.wants_maxvelocity = Some(value_float);
}
else {
error!("Can't parse float: {line}");
continue;
}
}
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["armodel", asset_name] => {
state.ar_model = Some(asset_name.to_string());
}
_ => {
error!("No match for [{}]", parts.join(","));
}
}
}
ew_spawn.send(SpawnEvent(state));
}
fn spawn_entities(
mut er_spawn: EventReader<SpawnEvent>,
mut commands: Commands,
asset_server: Res<AssetServer>,
mut meshes: ResMut<Assets<Mesh>>,
mut materials: ResMut<Assets<StandardMaterial>>,
) {
for state_wrapper in er_spawn.read() {
let state = &state_wrapper.0;
if state.class == DefClass::Actor {
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let actor_entity;
{
let mut actor = commands.spawn_empty();
actor.insert(actor::Actor {
id: state.id.clone(),
name: state.name.clone(),
camdistance: state.camdistance,
..default()
});
actor.insert(SleepingDisabled);
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actor.insert(world::DespawnOnPlayerDeath);
actor.insert(actor::HitPoints::default());
actor.insert(Position::from(state.pos));
actor.insert(Rotation::from(state.rotation));
if state.is_sphere {
let sphere_texture_handle: Handle<Image> = asset_server.load(format!("textures/{}.jpg", state.model));
let sphere_handle = meshes.add(Sphere::new(1.0).mesh().uv(128, 128));
let sphere_material_handle = materials.add(StandardMaterial {
base_color_texture: Some(sphere_texture_handle.clone()),
perceptual_roughness: 1.0,
metallic: 0.0,
..default()
});
actor.insert(PbrBundle {
mesh: sphere_handle,
material: sphere_material_handle,
transform: Transform {
scale: Vec3::splat(state.model_scale),
..default()
},
..default()
});
} else {
actor.insert(SceneBundle {
transform: Transform {
scale: Vec3::splat(state.model_scale),
..default()
},
scene: asset_server.load(world::asset_name_to_path(state.model.as_str())),
..default()
});
}
// Physics Parameters
if state.has_physics {
actor.insert(RigidBody::Dynamic);
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actor.insert(LinearVelocity(state.velocity));
actor.insert(AngularVelocity(state.angular_momentum));
actor.insert(ColliderDensity(state.density));
if state.collider_is_mesh {
actor.insert(AsyncSceneCollider::new(Some(
ComputedCollider::TriMesh
//ComputedCollider::ConvexDecomposition(VHACDParameters::default())
)));
}
else {
actor.insert(state.collider.clone());
}
}
// TODO: angular velocity for objects without collisions, static objects
// Optional Components
if state.is_player {
actor.insert(actor::Player);
actor.insert(actor::PlayerCamera);
}
if state.is_player || state.is_vehicle {
// used to apply mouse movement to actor rotation
actor.insert(ExternalTorque::ZERO.with_persistence(false));
}
if state.is_lifeform {
actor.insert(actor::LifeForm::default());
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actor.insert(actor::ExperiencesGForce::default());
actor.insert(actor::Suit {
oxygen: state.oxygen,
oxygen_max: nature::OXY_D,
integrity: state.suit_integrity,
..default()
});
}
if state.is_clickable {
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actor.insert(hud::IsClickable {
name: state.name.clone(),
..default()
});
}
if let Some(value) = state.wants_maxrotation {
actor.insert(actor::WantsMaxRotation(value));
}
if let Some(value) = state.wants_maxvelocity {
actor.insert(actor::WantsMaxVelocity(value));
}
if let Some(color) = state.light_color {
actor.insert(PointLightBundle {
point_light: PointLight {
intensity: state.light_brightness,
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color,
range: 100.0,
radius: 100.0,
..default()
},
..default()
});
}
if !state.chat.is_empty() {
actor.insert(chat::Talker {
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actor_id: state.id.clone(),
chat_name: state.chat.clone(),
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name: state.name.clone(),
pronoun: Some(state.pronoun.clone()),
talking_speed: 1.0,
});
}
if state.is_vehicle {
actor.insert(actor::Vehicle::default());
}
if state.is_vehicle || state.is_suited
|| state.thrust_forward > 0.0
|| state.thrust_sideways > 0.0
|| state.thrust_back > 0.0
|| state.reaction_wheels > 0.0
{
actor.insert(actor::Engine {
thrust_forward: state.thrust_forward,
thrust_back: state.thrust_back,
thrust_sideways: state.thrust_sideways,
reaction_wheels: state.reaction_wheels,
warmup_seconds: state.warmup_seconds,
engine_type: state.engine_type,
..default()
});
}
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if let Some(_) = state.ar_model {
actor.insert(hud::AugmentedRealityOverlayBroadcaster);
}
actor_entity = actor.id();
}
if let Some(ar_asset_name) = &state.ar_model {
commands.spawn((
hud::AugmentedRealityOverlay {
owner: actor_entity,
},
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world::DespawnOnPlayerDeath,
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SceneBundle {
scene: asset_server.load(world::asset_name_to_path(ar_asset_name)),
visibility: Visibility::Hidden,
..default()
},
));
}
}
}
}