From 384ea0f7a1bdd441fd879edd97ebd84657168ee13a62323f238daad484b7f0df Mon Sep 17 00:00:00 2001
From: Stef <stbuwalda@gmail.com>
Date: Wed, 24 Dec 2025 10:48:52 +0100
Subject: [PATCH] Added system that makes objects move based on their velocity.

---
 app/src/main.rs | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/app/src/main.rs b/app/src/main.rs
index c9dd56c..f85f667 100644
--- a/app/src/main.rs
+++ b/app/src/main.rs
@@ -1,4 +1,5 @@
 use bevy::color::palettes::basic::RED;
+use bevy::log;
 use bevy::prelude::*;                   // Core Bevy types
 
 
@@ -6,6 +7,7 @@ fn main() {
     App::new()
         .add_plugins(DefaultPlugins)
         .add_systems(Startup, setup)
+        .add_systems(Update, velocity_timestep)
         .run();
 }
 
@@ -15,7 +17,16 @@ fn setup(mut commands: Commands, mut meshes: ResMut<Assets<Mesh>>, mut materials
 
     let shape =meshes.add(Circle::new(50.0));
 
-    commands.spawn((Mesh2d(shape.clone()), MeshMaterial2d(materials.add(Color::from(RED))), Transform::from_xyz(100.0, 0.0, 0.0)));
+    commands.spawn((Mesh2d(shape.clone()), MeshMaterial2d(materials.add(Color::from(RED))), Transform::from_xyz(100.0, 0.0, 0.0), Velocity(vec3(0.0, 100.0, 0.0))));
 
-    commands.spawn((Mesh2d(shape.clone()), MeshMaterial2d(materials.add(Color::from(RED))), Transform::from_xyz(0.0, 0.0, 0.0)));
+    commands.spawn((Mesh2d(shape.clone()), MeshMaterial2d(materials.add(Color::from(RED))), Transform::from_xyz(0.0, 0.0, 0.0), Velocity(vec3(0.0, 100.0, 0.0))));
+}
+
+#[derive(Component)]
+struct Velocity(Vec3);
+
+fn velocity_timestep(time: Res<Time>, mut query: Query<(&Velocity, &mut Transform)>) {
+    for (velocity, mut transform) in query.iter_mut() {
+        transform.translation += velocity.0 * time.delta_secs();
+    }
 }
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