From 7ce9781f86c56f932dabc3bc84b8d21d7be8fecc Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Tue, 11 Aug 2026 20:41:41 -0700
Subject: refactor sim loop

---
 src/ui.rs | 34 ++++++++++++++++------------------
 1 file changed, 16 insertions(+), 18 deletions(-)

(limited to 'src/ui.rs')

diff --git a/src/ui.rs b/src/ui.rs
index dbdfa69..e55aff1 100644
--- a/src/ui.rs
+++ b/src/ui.rs
@@ -1,10 +1,6 @@
-use egui::{Color32, Stroke, Ui, accesskit::ListStyle::Circle, epaint::CircleShape};
+use egui::{Color32, Stroke, Ui, epaint::CircleShape};
 
-use crate::{
-    Config, Diagnostics, Input,
-    camera::Camera,
-    sim::materials::{MATERIALS, MaterialId},
-};
+use crate::{Config, Diagnostics, Input, camera::Camera, sim::materials::MaterialId};
 
 pub fn draw_egui<'a>(
     ui: &mut Ui,
@@ -16,7 +12,7 @@ pub fn draw_egui<'a>(
     ui.heading("Config");
     ui.add(egui::Slider::new(&mut config.brush_radius, 1..=100).text("Brush radius"));
 
-    let material = MATERIALS[config.brush_material as usize];
+    let material = config.brush_material.def();
 
     // material combobox
     egui::ComboBox::from_label("Select a material")
@@ -25,19 +21,21 @@ pub fn draw_egui<'a>(
             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.r, material.g, material.b),
-                }),
-            ));
+            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| {
-            ui.selectable_value(&mut config.brush_material, MaterialId::Void, "Void");
-            ui.selectable_value(&mut config.brush_material, MaterialId::Sand, "Sand");
-            ui.selectable_value(&mut config.brush_material, MaterialId::Water, "Water");
+            for material_id in MaterialId::ALL {
+                ui.selectable_value(
+                    &mut config.brush_material,
+                    material_id,
+                    material_id.def().name,
+                );
+            }
         });
 
     ui.add(egui::Slider::new(&mut config.fps, 1..=1000).text("Max FPS"));
-- 
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