From 05135beb87bbf0edace544b80ba40e327d9a89ac Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Sat, 15 Aug 2026 20:44:10 -0700
Subject: factor code out of main, optimizations

---
 src/renderer/ui.rs | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 64 insertions(+)
 create mode 100644 src/renderer/ui.rs

(limited to 'src/renderer/ui.rs')

diff --git a/src/renderer/ui.rs b/src/renderer/ui.rs
new file mode 100644
index 0000000..87ab878
--- /dev/null
+++ b/src/renderer/ui.rs
@@ -0,0 +1,64 @@
+use egui::{Color32, Stroke, Ui, epaint::CircleShape};
+
+use crate::{Camera, Config, Diagnostics, Input, sim::materials::MaterialId};
+
+pub fn draw_egui<'a>(
+    ui: &mut Ui,
+    config: &mut Config,
+    camera: &mut Camera,
+    diagnostics: &Diagnostics,
+    input: &Input,
+) {
+    puffin::profile_function!();
+    ui.heading("Config");
+    ui.add(egui::Slider::new(&mut config.brush_radius, 1..=100).text("Brush radius"));
+
+    let material = config.brush_material.def();
+
+    // material combobox
+    egui::ComboBox::from_label("Select a material")
+        .selected_text(format!(
+            "Material: [{}, d={}]",
+            material.name, material.density,
+        ))
+        .icon(move |ui, rect, _, _| {
+            ui.painter().add(egui::Shape::Circle(CircleShape {
+                center: rect.center(),
+                radius: rect.width() / 2.5,
+                stroke: Stroke::NONE,
+                fill: Color32::from_rgb(material.color.0, material.color.1, material.color.2),
+            }));
+        })
+        .show_ui(ui, |ui| {
+            for material_id in MaterialId::ALL {
+                ui.selectable_value(
+                    &mut config.brush_material,
+                    material_id,
+                    material_id.def().name,
+                );
+            }
+        });
+
+    ui.checkbox(&mut config.use_threading, "Use multithreading");
+    ui.label(format!("Real FPS: {}", diagnostics.fps));
+    ui.heading("Camera");
+    ui.add(egui::Slider::new(&mut camera.zoom, 0.0..=10.0).text("Zoom"));
+    ui.heading("Input");
+
+    input.last_mouse_pos_on_screen.map(|p| {
+        ui.label(format!(
+            "Mouse: x,y=({x}, {y}), lmb_pressed={lmb}",
+            x = p.0,
+            y = p.1,
+            lmb = input.is_lmb_pressed
+        ))
+    });
+
+    input
+        .last_mouse_pos_on_board
+        .map(|p| ui.label(format!("Mouse (board): x,y=({x}, {y})", x = p.0, y = p.1,)));
+
+    input
+        .last_mouse_pos_on_board
+        .map(|p| ui.label(format!("Mouse (chunk): x,y=({x}, {y})", x = p.0, y = p.1,)));
+}
-- 
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