From 2c120106c28b362567e610da16449e9a84f8a2a7 Mon Sep 17 00:00:00 2001
From: Crizomb <clementbart.45@gmail.com>
Date: Fri, 26 Dec 2025 13:12:09 +0100
Subject: [PATCH] movement + collision untested and unsued (but for real this
 time)

---
 src/collider.rs        |  5 +++++
 src/physics_body.rs    | 38 ++++++++++++++++++++++++++++++++++++++
 src/sphere_collider.rs |  7 +++++++
 3 files changed, 50 insertions(+)
 create mode 100644 src/collider.rs
 create mode 100644 src/physics_body.rs
 create mode 100644 src/sphere_collider.rs

diff --git a/src/collider.rs b/src/collider.rs
new file mode 100644
index 0000000..dc307ed
--- /dev/null
+++ b/src/collider.rs
@@ -0,0 +1,5 @@
+use bevy::{prelude::*, render::renderer};
+
+#[derive(Component, Default)]
+#[require(Transform)]
+pub struct Collider;
diff --git a/src/physics_body.rs b/src/physics_body.rs
new file mode 100644
index 0000000..29c8984
--- /dev/null
+++ b/src/physics_body.rs
@@ -0,0 +1,38 @@
+use bevy::{prelude::*, render::renderer};
+
+#[derive(Component)]
+#[require(Transform)]
+pub struct PhysicsBody {
+    pub mass: f32,
+    pub force: Vec2,
+    pub velocity: Vec2,
+    pub drag: f32, // velocity multiplied each physics update by (1-drag)
+}
+
+impl Default for PhysicsBody {
+    fn default() -> Self {
+        Self {
+            mass: 1.0,
+            force: Vec2::ZERO,
+            velocity: Vec2::ZERO,
+            drag: 0.0,
+        }
+    }
+}
+
+pub fn integrate(mut query: Query<(&mut Transform, &mut PhysicsBody)>, time: Res<Time<Fixed>>) {
+    for (mut transform, mut physicsbody) in &mut query {
+        let force = physicsbody.force;
+        let mass = physicsbody.mass;
+        let drag = physicsbody.drag;
+        let delta_secs = time.delta_secs();
+
+        physicsbody.velocity += force * delta_secs / mass;
+        // Drag because stability is good you know
+        physicsbody.velocity *= 1.0 - drag;
+
+        transform.translation.x += physicsbody.velocity.x * delta_secs;
+        transform.translation.y += physicsbody.velocity.y * delta_secs;
+        physicsbody.force = Vec2::ZERO;
+    }
+}
diff --git a/src/sphere_collider.rs b/src/sphere_collider.rs
new file mode 100644
index 0000000..bf28d84
--- /dev/null
+++ b/src/sphere_collider.rs
@@ -0,0 +1,7 @@
+use bevy::{prelude::*, render::renderer};
+
+#[derive(Component, Default)]
+#[require(Transform)]
+pub struct SphereCollider {
+    pub radius: f32,
+}