From f34a9b01a0b855b2147b17c57e142a7cb9fba4cb Mon Sep 17 00:00:00 2001
From: reo <emre@reoco.de>
Date: Thu, 25 Sep 2025 13:01:02 +0300
Subject: [PATCH] Add imgui slider command to the debug ui buffer
 implementation

---
 core/src/debug_ui.rs | 10 ++++++++++
 game/src/main.rs     |  9 +++++++--
 2 files changed, 17 insertions(+), 2 deletions(-)

diff --git a/core/src/debug_ui.rs b/core/src/debug_ui.rs
index 18d846f..df3b9f1 100644
--- a/core/src/debug_ui.rs
+++ b/core/src/debug_ui.rs
@@ -1,6 +1,7 @@
 pub enum UICommand {
     Text(String),
     Separator,
+    SliderF32 { label: String, min: f32, max: f32, value: std::rc::Rc<std::cell::RefCell<f32>> },
 }
 
 pub struct DebugUIBuffer {
@@ -21,6 +22,11 @@ impl DebugUIBuffer {
         self.cmds.push(UICommand::Separator);
     }
 
+    pub fn slider_f32<T: Into<String>>(&mut self, label: T, min: f32, max: f32, value: std::rc::Rc<std::cell::RefCell<f32>>) {
+        self.cmds.push(UICommand::SliderF32 { label: label.into(), min, max, value });
+    }
+    // End of commands
+
     pub fn write_buffer(&self, ui: &imgui::Ui) {
         for cmd in &self.cmds {
             match cmd {
@@ -30,6 +36,10 @@ impl DebugUIBuffer {
                 UICommand::Separator => {
                     ui.separator();
                 }
+                UICommand::SliderF32 { label, min, max, value } => {
+                    let mut v = value.borrow_mut();
+                    ui.slider_config(label.as_str(), *min, *max).build(&mut *v);
+                }
             }
         }
     }
diff --git a/game/src/main.rs b/game/src/main.rs
index b1b5c2c..05ae11e 100644
--- a/game/src/main.rs
+++ b/game/src/main.rs
@@ -34,10 +34,14 @@ impl System for UpdateAspectRatioSystem {
 }
 
 #[derive(Default)]
-struct RenderingTestSystem;
+struct RenderingTestSystem {
+    rotation_speed: std::rc::Rc<std::cell::RefCell<f32>>,
+}
 
 impl System for RenderingTestSystem {
     fn load_world(&mut self, ctx: &mut SystemContext) {
+        self.rotation_speed = std::rc::Rc::new(std::cell::RefCell::new(5.0));
+
         ctx.scene.world.spawn((Camera {
             eye:    Vec3::new(0.0, 0.0, 2.0),
             center: Vec3::ZERO,
@@ -67,11 +71,12 @@ impl System for RenderingTestSystem {
         dbg_ui.text("Hello World!".to_owned());
         dbg_ui.text(format!("Frame Delta: {}", ctx.platform_context.time_ctx.frame_dt));
         dbg_ui.text(format!("Fixed Delta: {}", ctx.platform_context.time_ctx.fixed_dt));
+        dbg_ui.slider_f32("Rotation Speed", -10.0, 10.0, self.rotation_speed.clone());
     }
 
     fn fixed_update(&mut self, ctx: &mut SystemContext) {
         ctx.scene.world.query_mut::<(&mut Transform, &ModelHandle)>().into_iter().for_each(|(_, (t, _))| {
-            t.rotation *= Quat::from_rotation_y(10.0 * ctx.platform_context.time_ctx.fixed_dt);
+            t.rotation *= Quat::from_rotation_y(*self.rotation_speed.borrow() * ctx.platform_context.time_ctx.fixed_dt);
         });
     }