From a57cb58602b323469861c0b06573c6e47db56f34 Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Sat, 29 Aug 2026 21:26:41 -0700
Subject: generating wood caves

---
 src/renderer/mod.rs | 12 +++++++++++-
 src/renderer/ui.rs  | 23 +++++++++++++++++++----
 2 files changed, 30 insertions(+), 5 deletions(-)

(limited to 'src/renderer')

diff --git a/src/renderer/mod.rs b/src/renderer/mod.rs
index 127a785..b5508e2 100644
--- a/src/renderer/mod.rs
+++ b/src/renderer/mod.rs
@@ -10,6 +10,7 @@ use crate::{
     camera::Camera,
     config::{CELLS_IN_CHUNK, CHUNK_SIZE},
     content::{materials::MaterialId, vfx::VfxMaterialId},
+    proc_gen::WorldGenerator,
     renderer::ui::draw_egui,
     sim::{
         cell_manager::manager::CellManager, entity::EntityId,
@@ -772,6 +773,7 @@ impl RendererState {
         config: &mut Config,
         diagnostics: &Diagnostics,
         input_manager: &InputManager,
+        world_generator: &mut WorldGenerator,
     ) {
         puffin::profile_function!();
 
@@ -819,7 +821,15 @@ impl RendererState {
                 .resizable(false)
                 // TODO collapse button
                 .show_collapsible(ui, &mut true, |panel_ui| {
-                    draw_egui(panel_ui, config, camera, diagnostics, input_manager, sim)
+                    draw_egui(
+                        panel_ui,
+                        config,
+                        camera,
+                        diagnostics,
+                        input_manager,
+                        sim,
+                        world_generator,
+                    )
                 });
         });
 
diff --git a/src/renderer/ui.rs b/src/renderer/ui.rs
index 02ebb48..9af0113 100644
--- a/src/renderer/ui.rs
+++ b/src/renderer/ui.rs
@@ -1,10 +1,12 @@
 use egui::{Color32, Stroke, Ui, epaint::CircleShape};
+use glam::IVec2;
 use rapier2d::pipeline::QueryFilter;
 
 use crate::{
     Camera, Config, Diagnostics,
     content::materials::MaterialId,
     input::InputManager,
+    proc_gen::WorldGenerator,
     sim::{rb_manager::DebugRenderMode, sim_manager::SimManager},
 };
 
@@ -23,7 +25,8 @@ pub fn draw_egui<'a>(
     camera: &mut Camera,
     diagnostics: &Diagnostics,
     input_manager: &InputManager,
-    sim: &SimManager,
+    sim: &mut SimManager,
+    world_generator: &mut WorldGenerator,
 ) {
     puffin::profile_function!();
     ui.heading("Config");
@@ -104,7 +107,19 @@ pub fn draw_egui<'a>(
     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");
+    ui.heading("Proc gen");
+    if ui.button("Generate").clicked() {
+        world_generator.update_params(config);
+        for cx in -5..5 {
+            for cy in -5..5 {
+                let chunk = world_generator.generate_chunk(IVec2::new(cx, cy));
+                sim.cell_manager.upsert(cx, cy, chunk);
+            }
+        }
+    }
+    ui.add(egui::Slider::new(&mut config.proc_gen_seed, -100000..=100000).text("Seed"));
+    ui.label("Cave noise");
+    ui.add(egui::Slider::new(&mut config.cave_noise_freq, 0.0..=1.0).text("Frequency"));
 
     ui.label(format!(
         "Mouse (world): x,y=({x}, {y})",
@@ -118,13 +133,13 @@ pub fn draw_egui<'a>(
         y = input_manager.chunk_mouse_pos.y
     ));
 
-    if let Some(&chunk) = sim.cell_manager.chunk_position_to_chunk_idx.get(&(
+    if let Some(&idx) = sim.cell_manager.chunk_position_to_chunk_idx.get(&(
         input_manager.chunk_mouse_pos.x,
         input_manager.chunk_mouse_pos.y,
     )) {
         ui.label(format!(
             "Sleeping={}",
-            sim.cell_manager.chunks[chunk].sleeping
+            sim.cell_manager.chunks[idx].sleeping
         ));
     }
 
-- 
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