From a208e395358a0738e5a6151b385ae77b095a932c Mon Sep 17 00:00:00 2001
From: annieversary <annnnnie@protonmail.com>
Date: Thu, 30 Sep 2021 22:31:47 +0200
Subject: [PATCH] a

---
 .gitignore         |    2 +
 Cargo.lock         | 3477 ++++++++++++++++++++++++++++++++++++++++++++
 Cargo.toml         |    9 +
 src/columns.rs     |   27 +
 src/light_balls.rs |   97 ++
 src/main.rs        |   76 +
 src/player.rs      |  121 ++
 7 files changed, 3809 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 Cargo.lock
 create mode 100644 Cargo.toml
 create mode 100644 src/columns.rs
 create mode 100644 src/light_balls.rs
 create mode 100644 src/main.rs
 create mode 100644 src/player.rs

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..0592392
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
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diff --git a/Cargo.lock b/Cargo.lock
new file mode 100644
index 0000000..0c3af44
--- /dev/null
+++ b/Cargo.lock
@@ -0,0 +1,3477 @@
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+ "parking_lot",
+ "percent-encoding",
+ "raw-window-handle",
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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..2f436f8
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "moria"
+version = "0.1.0"
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+bevy = "0.5.0"
diff --git a/src/columns.rs b/src/columns.rs
new file mode 100644
index 0000000..1423d44
--- /dev/null
+++ b/src/columns.rs
@@ -0,0 +1,27 @@
+use bevy::prelude::*;
+
+const DIS: f32 = 300.0;
+const SIZE: f32 = 20.0;
+const HEIGHT: f32 = 400.0;
+
+pub fn spawn_columns(
+    commands: &mut Commands,
+    meshes: &mut Assets<Mesh>,
+    materials: &mut Assets<StandardMaterial>,
+) {
+    let mut column_material: StandardMaterial = Color::rgb(0.7, 0.7, 0.7).into();
+    column_material.metallic = 0.0;
+    column_material.reflectance = 0.0;
+    let column_material = materials.add(column_material);
+    let col_mesh = meshes.add(Mesh::from(shape::Box::new(SIZE, HEIGHT, SIZE)));
+    for i in -8..8 {
+        for j in -8..8 {
+            commands.spawn_bundle(PbrBundle {
+                mesh: col_mesh.clone(),
+                material: column_material.clone(),
+                transform: Transform::from_xyz(i as f32 * DIS, HEIGHT / 2.0, j as f32 * DIS),
+                ..Default::default()
+            });
+        }
+    }
+}
diff --git a/src/light_balls.rs b/src/light_balls.rs
new file mode 100644
index 0000000..33f0b57
--- /dev/null
+++ b/src/light_balls.rs
@@ -0,0 +1,97 @@
+use bevy::prelude::*;
+
+use crate::player::Player;
+
+pub struct LightBall;
+pub fn light_up_ball_when_close_to_player(
+    mut commands: Commands,
+    player: Query<(&Transform, &Player), Without<LightBall>>,
+    mut thingies: Query<(
+        Entity,
+        &Transform,
+        &LightBall,
+        &mut Handle<StandardMaterial>,
+        Option<&mut Light>,
+    )>,
+    materials: Res<LightBallMaterials>,
+) {
+    let player_pos = if let Some(player) = player.iter().next() {
+        player.0.translation
+    } else {
+        return;
+    };
+
+    for (entity, trans, _, mut material, light) in thingies.iter_mut() {
+        let dis = trans.translation.distance(player_pos);
+        if dis < 20.0 {
+            *material = materials.lit.clone();
+
+            // change intensity,
+            // add light if there isn't one
+            if let Some(mut l) = light {
+                l.intensity = 300.0 * (20.0 - dis) / 20.0;
+            } else {
+                commands.entity(entity).insert(Light {
+                    color: Color::rgb(15.0, 15.0, 15.0),
+                    intensity: 300.0 * (20.0 - dis) / 20.0,
+                    ..Default::default()
+                });
+            }
+        } else {
+            *material = materials.unlit.clone();
+
+            // remove light if there is one
+            if light.is_some() {
+                commands.entity(entity).remove::<Light>();
+            }
+        }
+    }
+}
+
+pub fn spawn_light_ball(
+    commands: &mut Commands,
+    materials: &LightBallMaterials,
+    translation: Vec3,
+) {
+    commands
+        .spawn_bundle(PbrBundle {
+            mesh: materials.mesh.clone(),
+            material: materials.unlit.clone(),
+            transform: Transform::from_translation(translation),
+            ..Default::default()
+        })
+        .insert(LightBall);
+}
+
+pub struct LightBallMaterials {
+    unlit: Handle<StandardMaterial>,
+    lit: Handle<StandardMaterial>,
+    mesh: Handle<Mesh>,
+}
+impl FromWorld for LightBallMaterials {
+    fn from_world(world: &mut World) -> Self {
+        let world = world.cell();
+        let mut materials = world
+            .get_resource_mut::<Assets<StandardMaterial>>()
+            .unwrap();
+        let mut meshes = world.get_resource_mut::<Assets<Mesh>>().unwrap();
+
+        let mut unlit: StandardMaterial = Color::rgb(0.9, 0.9, 0.9).into();
+        unlit.metallic = 0.0;
+        unlit.reflectance = 0.0;
+        let unlit = materials.add(unlit);
+
+        let mut lit: StandardMaterial = Color::rgb(15.0, 15.0, 15.0).into();
+        lit.metallic = 0.5;
+        lit.reflectance = 0.5;
+        lit.emissive = Color::rgb(15.0, 15.0, 15.0);
+        let lit = materials.add(lit);
+
+        let mesh = meshes.add(Mesh::from(shape::Icosphere {
+            radius: 2.0,
+            subdivisions: 5,
+        }));
+
+        Self { lit, unlit, mesh }
+    }
+}
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..5c4a05e
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,76 @@
+use bevy::{input::system::exit_on_esc_system, pbr::AmbientLight, prelude::*};
+
+mod light_balls;
+use light_balls::*;
+mod player;
+use player::*;
+mod columns;
+use columns::*;
+
+fn main() {
+    App::build()
+        .insert_resource(Msaa { samples: 4 })
+        .add_plugins(DefaultPlugins)
+        .init_resource::<LightBallMaterials>()
+        .add_startup_system(setup.system())
+        .add_system(exit_on_esc_system.system())
+        .add_system(light_movement.system())
+        .add_system(move_player.system())
+        .add_system(camera_follow_player.system())
+        .add_system(light_up_ball_when_close_to_player.system())
+        .run();
+}
+
+pub struct Camera;
+
+/// set up a simple 3D scene
+fn setup(
+    mut commands: Commands,
+    mut meshes: ResMut<Assets<Mesh>>,
+    mut materials: ResMut<Assets<StandardMaterial>>,
+    mut ambient: ResMut<AmbientLight>,
+    light_ball_materials: Res<LightBallMaterials>,
+) {
+    // set ambient light to 0
+    ambient.color = Color::rgb(0.3, 0.3, 0.3);
+    ambient.brightness = 0.02;
+
+    // floor
+    let mut floor_material: StandardMaterial = Color::rgb(0.1, 0.1, 0.1).into();
+    floor_material.metallic = 0.0;
+    floor_material.reflectance = 0.0;
+    let floor_material = materials.add(floor_material);
+    commands.spawn_bundle(PbrBundle {
+        mesh: meshes.add(Mesh::from(shape::Plane { size: 10000.0 })),
+        material: floor_material,
+        ..Default::default()
+    });
+
+    // columns
+    spawn_columns(&mut commands, &mut meshes, &mut materials);
+
+    // player
+    spawn_player(&mut commands, &mut meshes, &mut materials);
+
+    // light balls
+    for i in 1..10 {
+        spawn_light_ball(
+            &mut commands,
+            &light_ball_materials,
+            Vec3::new(i as f32 * 30.0, 2.0, 6.0),
+        );
+        spawn_light_ball(
+            &mut commands,
+            &light_ball_materials,
+            Vec3::new(i as f32 * 30.0, 2.0, -6.0),
+        );
+    }
+
+    // camera
+    commands
+        .spawn_bundle(PerspectiveCameraBundle {
+            transform: Transform::from_xyz(-20.0, 100.0, 50.0).looking_at(Vec3::ZERO, Vec3::Y),
+            ..Default::default()
+        })
+        .insert(Camera);
+}
diff --git a/src/player.rs b/src/player.rs
new file mode 100644
index 0000000..5ce16c1
--- /dev/null
+++ b/src/player.rs
@@ -0,0 +1,121 @@
+use bevy::prelude::*;
+
+use crate::Camera;
+
+pub struct Player;
+pub struct PlayerLight {
+    i: u8,
+}
+
+pub fn spawn_player(
+    commands: &mut Commands,
+    meshes: &mut Assets<Mesh>,
+    materials: &mut Assets<StandardMaterial>,
+) {
+    commands
+        .spawn_bundle(PbrBundle {
+            mesh: meshes.add(Mesh::from(shape::Capsule {
+                radius: 0.5,
+                ..Default::default()
+            })),
+            material: materials.add(Color::rgb(1.0, 1.0, 1.0).into()),
+            transform: Transform::from_xyz(33.0, 1.0, 0.0),
+            ..Default::default()
+        })
+        .insert(Player)
+        .with_children(|parent| {
+            // light
+            let mut light_material: StandardMaterial = Color::rgb(0.3, 0.5, 0.3).into();
+            light_material.metallic = 0.5;
+            light_material.reflectance = 0.5;
+            light_material.emissive = Color::rgb(15.0, 15.0, 15.0);
+            let light_material = materials.add(light_material);
+
+            for i in 0..5 {
+                parent
+                    .spawn_bundle(PbrBundle {
+                        mesh: meshes.add(Mesh::from(shape::Icosphere {
+                            radius: 0.2,
+                            subdivisions: 5,
+                        })),
+                        material: light_material.clone(),
+                        transform: Transform::from_xyz(0.0, 0.5, 0.0),
+                        ..Default::default()
+                    })
+                    .insert_bundle(LightBundle {
+                        transform: Transform::from_xyz(0.0, 0.0, 0.0),
+                        light: Light {
+                            ..Default::default()
+                        },
+                        ..Default::default()
+                    })
+                    .insert(PlayerLight { i: i as u8 + 1 });
+            }
+        });
+}
+
+pub fn light_movement(mut query: Query<(&mut Transform, &PlayerLight)>, time: Res<Time>) {
+    let t = time.seconds_since_startup();
+    for (mut trans, light) in query.iter_mut() {
+        let i = light.i as f64;
+        let i2 = i / 2.0;
+        trans.translation.y = 6.0 * (t * 1.1 * i2 + i).sin() as f32 + 7.0;
+        trans.translation.x = 5.0 * i2 as f32 * (t * 0.4 * i2 + i).cos() as f32;
+        trans.translation.z = 5.0 * (t * 0.4 * i + i).sin() as f32;
+    }
+}
+
+pub fn move_player(
+    mut query: Query<(&mut Transform, &Player)>,
+    input: Res<Input<KeyCode>>,
+    time: Res<Time>,
+) {
+    let ds = time.delta_seconds() * 5.0;
+
+    // TODO rotate according to camera position
+    // but make it snap to coord system
+
+    for (mut transform, _) in query.iter_mut() {
+        if input.pressed(KeyCode::W) {
+            transform.translation += Vec3::X * ds;
+        }
+        if input.pressed(KeyCode::S) {
+            transform.translation -= Vec3::X * ds;
+        }
+        if input.pressed(KeyCode::A) {
+            transform.translation -= Vec3::Z * ds;
+        }
+        if input.pressed(KeyCode::D) {
+            transform.translation += Vec3::Z * ds;
+        }
+    }
+}
+
+pub fn camera_follow_player(
+    player: Query<(&Transform, &Player), Without<Camera>>,
+    mut camera: Query<(&mut Transform, &Camera), Without<Player>>,
+    time: Res<Time>,
+) {
+    let player_pos = if let Some(player) = player.iter().next() {
+        player.0.translation
+    } else {
+        return;
+    };
+
+    let ds = time.delta_seconds() * 5.0;
+    for (mut trans, _) in camera.iter_mut() {
+        trans.look_at(player_pos, Vec3::Y);
+
+        // keep a distance to the player
+        if trans.translation.distance(player_pos) > 170.0 {
+            let mut d = trans.rotation * Vec3::Z * ds;
+            d.y = 0.0;
+            trans.translation -= d;
+        }
+        if trans.translation.distance(player_pos) < 100.0 {
+            let mut d = trans.rotation * Vec3::Z * ds;
+            d.y = 0.0;
+            trans.translation += d;
+        }
+    }
+}