From d7eccba2055cd7784a0db6d9ee8692a4f3510931 Mon Sep 17 00:00:00 2001
From: Kai Stevenson <kai@kaistevenson.com>
Date: Sat, 15 Aug 2026 22:46:53 -0700
Subject: fire, optimize viewport rendering

---
 src/renderer/mod.rs | 14 +++++++++-----
 src/renderer/ui.rs  | 35 ++++++++++++++++++++++++++---------
 2 files changed, 35 insertions(+), 14 deletions(-)

(limited to 'src/renderer')

diff --git a/src/renderer/mod.rs b/src/renderer/mod.rs
index fcc5d36..4499688 100644
--- a/src/renderer/mod.rs
+++ b/src/renderer/mod.rs
@@ -212,8 +212,8 @@ impl RendererState {
         let mut renderer_chunks: Vec<RendererChunk> = Vec::new();
         // match number of world chunks
         // TODO refactor so that this implicit
-        for _ in -10..10 {
-            for _ in -10..10 {
+        for _ in -10..1 {
+            for _ in -100..100 {
                 let texture = device.create_texture(&wgpu::TextureDescriptor {
                     label: None,
                     mip_level_count: 1,
@@ -336,7 +336,7 @@ impl RendererState {
                 .resizable(false)
                 // TODO collapse button
                 .show_collapsible(ui, &mut true, |panel_ui| {
-                    draw_egui(panel_ui, config, camera, diagnostics, input)
+                    draw_egui(panel_ui, config, camera, diagnostics, input, world)
                 });
         });
 
@@ -449,9 +449,13 @@ impl RendererState {
 
             render_pass.set_bind_group(0, &self.camera_uniform_bind_group, &[]);
 
+            let (xl, xu, yl, yu) = camera.viewport_bounds_world();
+            let ((cxl, cyl), _) = World::split_game_position(xl.floor() as i32, yl.floor() as i32);
+            let ((cxu, cyu), _) = World::split_game_position(xu.floor() as i32, yu.floor() as i32);
+
             // TODO only visible chunks
-            for cx in -10..10 {
-                for cy in -10..10 {
+            for cx in cxl..=cxu {
+                for cy in cyl..=cyu {
                     if let Some(idx) = world.chunk_position_to_chunk_idx.get(&(cx, cy)) {
                         let render_chunk = &self.renderer_chunks[*idx];
                         render_pass.set_bind_group(1, &render_chunk.bind_group, &[]);
diff --git a/src/renderer/ui.rs b/src/renderer/ui.rs
index 87ab878..b4e6f74 100644
--- a/src/renderer/ui.rs
+++ b/src/renderer/ui.rs
@@ -1,6 +1,9 @@
 use egui::{Color32, Stroke, Ui, epaint::CircleShape};
 
-use crate::{Camera, Config, Diagnostics, Input, sim::materials::MaterialId};
+use crate::{
+    Camera, Config, Diagnostics, Input,
+    sim::{materials::MaterialId, world::World},
+};
 
 pub fn draw_egui<'a>(
     ui: &mut Ui,
@@ -8,6 +11,7 @@ pub fn draw_egui<'a>(
     camera: &mut Camera,
     diagnostics: &Diagnostics,
     input: &Input,
+    world: &World,
 ) {
     puffin::profile_function!();
     ui.heading("Config");
@@ -24,7 +28,7 @@ pub fn draw_egui<'a>(
         .icon(move |ui, rect, _, _| {
             ui.painter().add(egui::Shape::Circle(CircleShape {
                 center: rect.center(),
-                radius: rect.width() / 2.5,
+                radius: rect.height() / 2.0,
                 stroke: Stroke::NONE,
                 fill: Color32::from_rgb(material.color.0, material.color.1, material.color.2),
             }));
@@ -54,11 +58,24 @@ pub fn draw_egui<'a>(
         ))
     });
 
-    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,)));
+    if let Some((x, y)) = input.last_mouse_pos_on_board {
+        ui.heading("Entity");
+        ui.label(format!("x,y=({x}, {y})"));
+        if let Some(cell) = world.get_cell_from_game_position(x, y) {
+            let material = cell.material.def();
+            let cell_label = ui.label(
+                egui::RichText::new(format!("Cell: {}", material.name)).color(Color32::LIGHT_BLUE),
+            );
+            ui.painter().add(egui::Shape::Circle(CircleShape {
+                center: cell_label.rect.right_center() + egui::vec2(10.0, 0.0),
+                radius: cell_label.rect.height() / 2.5,
+                stroke: Stroke::NONE,
+                fill: Color32::from_rgb(material.color.0, material.color.1, material.color.2),
+            }));
+            ui.label(
+                egui::RichText::new(format!("Flags: {:b}", cell.flags)).color(Color32::YELLOW),
+            );
+            ui.label(egui::RichText::new(format!("Data: {:b}", cell.data)).color(Color32::RED));
+        }
+    }
 }
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