Strip pipeline/palette/depth/relax UI; lock to paint mode

- Remove Pipeline stage, Palette, Mesh depth, Relaxation UI sections
- Remove Build button; mesh always builds as relaxed Goldberg depth-5
- Hardcode get_params() — no DOM reads for build parameters
- Remove current_stage; use_relaxed is always true
- Tool buttons no longer toggle paint off when re-clicking active tool

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

standalone/goldberg-sphere/index.html

@@ -90,48 +90,6 @@
 		<h3>Sphere Playground</h3>
 	</div>
 
-	<div>
-		<h3>Pipeline stage</h3>
-		<div class="stage-grid" style="margin-top:6px">
-			<button class="sb" data-stage="ico">Icosahedron</button>
-			<button class="sb" data-stage="subdiv">Subdivided</button>
-			<button class="sb" data-stage="goldberg">Goldberg</button>
-			<button class="sb active" data-stage="relaxed">Relaxed</button>
-		</div>
-	</div>
-
-	<div>
-		<h3>Palette</h3>
-		<div id="palette-grid" class="stage-grid" style="margin-top:6px">
-			<!-- populated by JS -->
-		</div>
-	</div>
-
-	<div>
-		<h3>Mesh</h3>
-		<div class="param" style="margin-top:6px">
-			<label>Depth</label>
-			<input type="range" id="depth" min="1" max="5" value="5">
-			<span class="val" id="depth-val">5</span>
-		</div>
-	</div>
-
-	<div>
-		<h3>Relaxation</h3>
-		<div class="param" style="margin-top:6px">
-			<label>Iterations</label>
-			<input type="number" id="iters" value="500" min="0" step="50">
-		</div>
-		<div class="param">
-			<label>α edge</label>
-			<input type="number" id="alpha-edge" value="0" min="0" step="0.01">
-		</div>
-		<div class="param">
-			<label>α centroid</label>
-			<input type="number" id="alpha-centroid" value="0.04" min="0" step="0.001">
-		</div>
-	</div>
-
 	<div>
 		<h3>Paint</h3>
 		<div style="display:flex; gap:4px; margin-top:6px">
@@ -252,7 +210,6 @@
 	</div>
 
 	<button id="spin-btn" style="background:#0a1a2a; border:1px solid #2a4a6a; color:#7ab; padding:7px; cursor:pointer; font-family:monospace; font-size:13px; width:100%">↻ Auto-spin</button>
-	<button id="build-btn">▶ Build</button>
 
 	<div>
 		<div id="status">Ready</div>

standalone/goldberg-sphere/playground_main.mjs

@@ -5,11 +5,11 @@ import { mat4_mul, mat4_perspective, mat4_translate_z, quat_identity, quat_from_
 import { create_program, make_buffer } from './gl_utils.mjs';
 import { PAINT_BG, PAINT_BG_PBR, PAINT_BG_NOISE, Paint_State } from './paint_state.mjs';
 import { Spin_State } from './spin_state.mjs';
-import { shape_distortion, build_triangle_geo, build_goldberg_geo } from './render_geo.mjs';
+import { shape_distortion, build_goldberg_geo } from './render_geo.mjs';
 import { build_goldberg_adjacency } from './topology.mjs';
 import { Undo_State } from './undo_state.mjs';
 import { Env_State } from './env_state.mjs';
-import { PALETTES, DEFAULT_PALETTE } from './palettes.mjs';
+import { DEFAULT_PALETTE } from './palettes.mjs';
 
 // ---------------------------------------------------------------------------
 // Load shaders
@@ -32,7 +32,6 @@ const paint      = new Paint_State();
 const undo_state = new Undo_State();
 const env        = new Env_State();
 let current_geo      = null;
-let current_stage    = 'relaxed';
 let current_palette  = DEFAULT_PALETTE;
 let building         = false;
 let active_brush_side = 'left';
@@ -42,12 +41,7 @@ let paint_dirty    = false;
 let debounce_timer = null;
 
 function get_params() {
-	return {
+	return { depth: 5, iters: 500, alpha_edge: 0, alpha_centroid: 0.04 };
-		depth:          parseInt(document.getElementById('depth').value, 10),
-		iters:          parseInt(document.getElementById('iters').value, 10),
-		alpha_edge:    parseFloat(document.getElementById('alpha-edge').value),
-		alpha_centroid: parseFloat(document.getElementById('alpha-centroid').value),
-	};
 }
 
 
@@ -106,7 +100,7 @@ function upload_geo() {
 function rebuild_face_colors() {
 	if (!cache.goldberg || !face_col_buf) { return; }
 	const goldberg    = cache.goldberg;
-	const use_relaxed = current_stage === 'relaxed';
+	const use_relaxed = true;
 	const fcol = [], fpbr = [], fnoise = [];
 	for (let fi = 0; fi < goldberg.faces.length; fi++) {
 		const face  = goldberg.faces[fi];
@@ -202,8 +196,6 @@ function apply_history(side) {
 async function build() {
 	if (building) { return; }
 	building = true;
-	const btn = document.getElementById('build-btn');
-	btn.disabled = true;
 
 	const p  = get_params();
 	const t0 = Date.now();
@@ -217,14 +209,6 @@ async function build() {
 			cache.poly = null;
 			cache.goldberg = null;
 		}
-		if (current_stage === 'ico') {
-			current_geo = build_triangle_geo(cache.ico, current_palette);
-			upload_geo();
-			cache.depth = p.depth;
-			set_stats(current_geo, 'Icosahedron', Date.now() - t0);
-			set_status('');
-			return;
-		}
 
 		if (depth_changed || !cache.poly) {
 			let poly = cache.ico;
@@ -235,14 +219,6 @@ async function build() {
 			cache.poly = poly;
 			cache.goldberg = null;
 		}
-		if (current_stage === 'subdiv') {
-			current_geo = build_triangle_geo(cache.poly, current_palette);
-			upload_geo();
-			cache.depth = p.depth;
-			set_stats(current_geo, `Subdivided ×${p.depth}`, Date.now() - t0);
-			set_status('');
-			return;
-		}
 
 		if (depth_changed || !cache.goldberg) {
 			set_status('Building Goldberg dual…'); await yield_ui(30);
@@ -250,16 +226,8 @@ async function build() {
 			cache.adj = null;
 			undo_state.invalidate();
 		}
-		if (current_stage === 'goldberg') {
-			current_geo = build_goldberg_geo(cache.goldberg, false, paint, current_palette);
-			upload_geo();
-			cache.depth = p.depth;
-			set_stats(current_geo, 'Goldberg (no relax)', Date.now() - t0);
-			set_status('');
-			return;
-		}
 
-		set_status(`Relaxing (${p.iters} iters, edge=${p.alpha_edge}, centroid=${p.alpha_centroid})…`);
+		set_status(`Relaxing (${p.iters} iters)…`);
 		await yield_ui(50);
 		cache.goldberg.relax_sphere(p.iters, p.alpha_edge, p.alpha_centroid);
 		current_geo = build_goldberg_geo(cache.goldberg, true, paint, current_palette);
@@ -270,7 +238,6 @@ async function build() {
 
 	} finally {
 		building = false;
-		btn.disabled = false;
 		snapshot_now();
 	}
 }
@@ -302,7 +269,7 @@ function pick_face(px, py) {
 	const hx = ro[0]+t*rd[0], hy = ro[1]+t*rd[1], hz = ro[2]+t*rd[2];
 
 	const goldberg    = cache.goldberg;
-	const use_relaxed = current_stage === 'relaxed';
+	const use_relaxed = true;
 	let best_fi = -1, best_dot = -Infinity;
 	for (let fi = 0; fi < goldberg.faces.length; fi++) {
 		const face  = goldberg.faces[fi];
@@ -409,7 +376,7 @@ function faces_at_radius(center_fi, radius) {
 // ---------------------------------------------------------------------------
 
 function save_paint() {
-	const depth = parseInt(document.getElementById('depth').value);
+	const depth = 5;
 	const faces = [];
 	for (const [fi, c] of paint.face_colors) {
 		const h   = v => Math.round(v*255).toString(16).padStart(2, '0');
@@ -432,10 +399,7 @@ function load_paint(file) {
 	reader.onload = e => {
 		try {
 			const data  = JSON.parse(e.target.result);
-			const depth = parseInt(document.getElementById('depth').value);
+			if (data.depth !== 5) {
-			if (data.depth !== depth) {
-				document.getElementById('depth').value           = data.depth;
-				document.getElementById('depth-val').textContent = data.depth;
 				cache.poly = null; cache.goldberg = null; cache.adj = null;
 			}
 			paint.face_colors.clear();
@@ -730,50 +694,6 @@ function render_frame(ts) {
 // UI wiring
 // ---------------------------------------------------------------------------
 
-// Palette buttons (built dynamically from PALETTES array).
-{
-	const grid = document.getElementById('palette-grid');
-	for (const p of PALETTES) {
-		const btn = document.createElement('button');
-		btn.className   = 'sb' + (p === DEFAULT_PALETTE ? ' active' : '');
-		btn.textContent = p.name;
-		btn.addEventListener('click', () => {
-			current_palette = p;
-			grid.querySelectorAll('.sb').forEach(b => b.classList.remove('active'));
-			btn.classList.add('active');
-			rebuild_face_colors();
-			// Triangle stages need a full rebuild since positions are shared.
-			if (current_stage === 'ico' || current_stage === 'subdiv') { build(); }
-		});
-		grid.appendChild(btn);
-	}
-}
-
-document.querySelectorAll('.sb').forEach(btn => {
-	btn.addEventListener('click', () => {
-		document.querySelectorAll('.sb').forEach(b => b.classList.remove('active'));
-		btn.classList.add('active');
-		current_stage = btn.dataset.stage;
-		build();
-	});
-});
-
-document.getElementById('depth').addEventListener('input', () => {
-	const d = parseInt(document.getElementById('depth').value);
-	document.getElementById('depth-val').textContent = d;
-	document.getElementById('iters').value = d * 8;
-	cache.poly = null;
-	cache.goldberg = null;
-	cache.adj = null;
-});
-
-document.getElementById('build-btn').addEventListener('click', () => {
-	if (current_stage === 'relaxed') {
-		cache.goldberg = null;
-		cache.adj = null;
-	}
-	build();
-});
 
 
 document.getElementById('spin-btn').addEventListener('click', () => {
@@ -802,12 +722,8 @@ const update_paint_buttons = () => {
 };
 
 const make_tool_handler = tool => () => {
-	if (!paint.enabled || paint.tool !== tool) {
+	paint.enabled = true;
-		paint.enabled = true;
+	paint.tool    = tool;
-		paint.tool    = tool;
-	} else {
-		paint.enabled = false;
-	}
 	update_paint_buttons();
 };