From d4d7329962488255db8355fa00356da742abd19c Mon Sep 17 00:00:00 2001
From: Jonni Liljamo <jonni@liljamo.com>
Date: Thu, 11 May 2023 12:35:47 +0300
Subject: [PATCH] feat(client): basic camera controls

---
 client/src/main.rs | 41 ++++++++++++++++++++++++++++++++++++++---
 1 file changed, 38 insertions(+), 3 deletions(-)

diff --git a/client/src/main.rs b/client/src/main.rs
index a94c4f0..7b562cb 100644
--- a/client/src/main.rs
+++ b/client/src/main.rs
@@ -10,7 +10,7 @@
 #![allow(clippy::derivable_impls)]
 
 use api::user::User;
-use bevy::prelude::*;
+use bevy::{prelude::*, input::mouse::{MouseWheel, MouseScrollUnit}};
 use bevy_assets_bundler::*;
 use bevy_editor_pls::EditorPlugin;
 use bevy_egui::EguiPlugin;
@@ -102,7 +102,7 @@ fn main() {
     app.add_plugin(plugins::MenuPlugin);
     app.add_plugin(plugins::GamePlugin);
 
-    app.add_startup_system(setup);
+    app.add_startup_system(setup).add_system(move_camera);
     app.run();
 
     info!("goodbye");
@@ -117,7 +117,7 @@ fn setup(mut commands: Commands) {
             Camera3dBundle {
                 transform: Transform {
                     translation: Vec3::new(0., 5.5, 5.8),
-                    rotation: Quat::from_rotation_x(-1.0),
+                    rotation: Quat::from_rotation_x(-1.2),
                     ..Default::default()
                 },
                 ..Default::default()
@@ -127,6 +127,41 @@ fn setup(mut commands: Commands) {
         .insert(PlayerCamera);
 }
 
+fn move_camera(
+    time: Res<Time>,
+    input: Res<Input<KeyCode>>,
+    mut mouse_wheel_ev_r: EventReader<MouseWheel>,
+    mut camera_query: Query<(&PlayerCamera, &mut Transform)>,
+) {
+    for (_camera, mut transform) in &mut camera_query {
+        let mut direction = Vec3::ZERO;
+
+        let y_modifier = 3.;
+        for ev in mouse_wheel_ev_r.iter() {
+            match ev.unit {
+                MouseScrollUnit::Line => direction.y -= 20.0 * ev.y.signum() * y_modifier * time.delta_seconds(),
+                MouseScrollUnit::Pixel => direction.y -= ev.y * y_modifier * time.delta_seconds(),
+            }
+        }
+
+        if input.pressed(KeyCode::A) {
+            direction.x -= 1.;
+        }
+        if input.pressed(KeyCode::D) {
+            direction.x += 1.;
+        }
+        if input.pressed(KeyCode::W) {
+            direction.z -= 1.;
+        }
+        if input.pressed(KeyCode::S) {
+            direction.z += 1.;
+        }
+
+        let cam_speed = 4.;
+        transform.translation += direction * cam_speed * time.delta_seconds();
+    }
+}
+
 fn editor_controls() -> bevy_editor_pls::controls::EditorControls {
     use bevy_editor_pls::controls;
 
-- 
2.44.1