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log.md

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+Live reload enabled.
+preprocess_manual.js:16 [preprocess_manual.js] ===== MODULE LOADING =====
+main.js:16 [MAIN] DOMContentLoaded fired
+main.js:269 [MAIN] Calling setupPathsFromUrlOrSelect...
+main.js:46 [MAIN] setupPathsFromUrlOrSelect started
+main.js:52 [MAIN] Initial paths - gsPath: undefined gvrmPath: undefined
+main.js:55 [MAIN] No paths in URL, showing select UI
+main.js:66 [MAIN] Elements check:
+main.js:67   - selectContainer: true
+main.js:68   - manualModeButton: true
+main.js:69   - manualFileInput: true
+main.js:117 [MAIN] Setting up file load promise
+main.js:172 [MAIN] Setting up manual mode listeners
+main.js:229 [MAIN] Manual mode listeners set up successfully
+main.js:259 [MAIN] Waiting for file load promise...
+main.js:175 [MAIN] ===== Manual mode button clicked! =====
+main.js:178 [MAIN] Opening manual file input...
+main.js:175 [MAIN] ===== Manual mode button clicked! =====
+main.js:178 [MAIN] Opening manual file input...
+main.js:184 [MAIN] ===== Manual file input changed! =====
+main.js:186 [MAIN] File object: File
+main.js:190 [MAIN] Manual file selected: fountain_trim9.ply Extension: ply
+main.js:198 [MAIN] Reading manual file...
+main.js:201 [MAIN] Manual file read complete, size: 57407083
+main.js:209 [MAIN] Manual mode file loaded: fountain_trim9.ply
+main.js:210 [MAIN] gsPath: blob:http://127.0.0.1:5500/513a1be2-32e6-405e-aec0-47de526c5c35
+main.js:211 [MAIN] gsFileName: fountain_trim9.ply
+main.js:110 [MAIN] Hiding select UI
+main.js:215 [MAIN] ===== Resolving with MANUAL MODE =====
+main.js:261 [MAIN] File load promise resolved: Object
+main.js:271 [MAIN] setupPathsFromUrlOrSelect returned: Object
+main.js:277 [MAIN] After pathResult:
+main.js:278   - gsPath: blob:http://127.0.0.1:5500/513a1be2-32e6-405e-aec0-47de526c5c35
+main.js:279   - gvrmPath: undefined
+main.js:280   - isManualMode: true
+main.js:283 [MAIN] Initializing renderer...
+main.js:289 [MAIN] Initializing camera...
+main.js:316 [MAIN] Initializing scene...
+main.js:323 [MAIN] Three.js initialization complete
+main.js:506 [MAIN] Processing GS file: blob:http://127.0.0.1:5500/513a1be2-32e6-405e-aec0-47de526c5c35
+main.js:507 [MAIN] Manual mode: true
+main.js:519 [MAIN] fileName: fountain_trim9.gvrm
+main.js:529 [MAIN] ===== STARTING MANUAL PREPROCESSING MODE =====
+main.js:530 [MAIN] Parameters:
+main.js:531   - vrmPath: ./assets/sotai.vrm
+main.js:532   - gsPath: blob:http://127.0.0.1:5500/513a1be2-32e6-405e-aec0-47de526c5c35
+main.js:533   - fileName: fountain_trim9.gvrm
+preprocess_manual.js:977 [preprocessManual] ===== FUNCTION CALLED =====
+preprocess_manual.js:978 [preprocessManual] Parameters:
+preprocess_manual.js:979   vrmPath: ./assets/sotai.vrm
+preprocess_manual.js:980   gsPath: blob:http://127.0.0.1:5500/513a1be2-32e6-405e-aec0-47de526c5c35
+preprocess_manual.js:981   fileName: fountain_trim9.gvrm
+preprocess_manual.js:984 [preprocessManual] Creating Promise...
+preprocess_manual.js:84 [createManualUI] Creating manual preprocessing UI...
+preprocess_manual.js:988 [preprocessManual] UI created
+preprocess_manual.js:435 [ManualUI] initialize called
+main.js:541 [MAIN] preprocessManual called, waiting for promise...
+preprocess_manual.js:991 [preprocessManual] UI initialized, starting manual process...
+preprocess_manual.js:1005 [preprocessManual] PLY loaded: 231474 vertices
+preprocess_manual.js:1011 [preprocessManual] ===== ANALYZING PLY COORDINATE SYSTEM =====
+preprocess_manual.js:1026 [PCA] Center: Object
+preprocess_manual.js:1052 [PCA] Covariance matrix: Object
+preprocess_manual.js:1067 [PCA] Variance ratios: Object
+preprocess_manual.js:1080 [PCA] Is aligned with world axes: false
+preprocess_manual.js:1120 [preprocessManual] ===== PLY DATA LOADED =====
+preprocess_manual.js:1121 [preprocessManual] PLY data is in CAMERA coordinate space
+preprocess_manual.js:1122   Total vertices: 231474
+preprocess_manual.js:1141 [preprocessManual] PLY bounds (CAMERA space):
+preprocess_manual.js:1142   Min: Object
+preprocess_manual.js:1143   Max: Object
+preprocess_manual.js:1144   Center: Object
+preprocess_manual.js:1150 [preprocessManual] ✓ PLY coordinates preserved (CAMERA space)
+preprocess_manual.js:1152 [preprocessManual] ===== COORDINATE SYSTEM CHECK =====
+preprocess_manual.js:1155   World origin (0,0,0) in camera space: Object
+preprocess_manual.js:1160   Camera position in world space: Object
+preprocess_manual.js:1232 [preprocessManual] ✓ Coordinate transformation functions defined
+preprocess_manual.js:1471 [preprocessManual] GS initialized
+preprocess_manual.js:1490 [preprocessManual] No alignment transform needed for GS
+preprocess_manual.js:1498 [preprocessManual] ✓ Camera controls created and saved globally
+preprocess_manual.js:1507 [preprocessManual] Keyboard controls initialized
+preprocess_manual.js:1557 [preprocessManual] ✓ Animation loop started with camera lock support
+preprocess_manual.js:1610 [preprocessManual] Camera positioned at: Object
+preprocess_manual.js:1617 [preprocessManual] Initial box setup - size: Object
+preprocess_manual.js:1660 [preprocessManual] UI sliders initialized to PLY-aligned values
+preprocess_manual.js:1666 [preprocessManual] ✓ Camera and Box aligned to PLY
+preprocess_manual.js:1546 [animateControls] Status check: Object
+preprocess_manual.js:1399 
+
+
+preprocess_manual.js:1400 ═══════════════════════════════════════════════════════
+preprocess_manual.js:1401            CONFIRM BOX BUTTON CLICKED
+preprocess_manual.js:1402 ═══════════════════════════════════════════════════════
+preprocess_manual.js:1431 [CONFIRM] World box (from UI): Object
+preprocess_manual.js:1434 [CONFIRM] Transforming box to camera space...
+preprocess_manual.js:1438 [CONFIRM] Camera box (transformed): Object
+preprocess_manual.js:1441 [CONFIRM] Displaying box in camera space...
+preprocess_manual.js:1449 [CONFIRM] Filtering splats in camera space...
+preprocess_manual.js:1296 [filterSplatsByCameraBox] ===== FILTERING START =====
+preprocess_manual.js:1297 [filterSplatsByCameraBox] CAMERA-space box:
+preprocess_manual.js:1298   Min: Object
+preprocess_manual.js:1299   Max: Object
+preprocess_manual.js:1300   Total vertices: 231474
+preprocess_manual.js:1315 [filterSplatsByCameraBox] ===== FILTERING COMPLETE =====
+preprocess_manual.js:1316   Filtered: 0 / 231474
+preprocess_manual.js:1317   Retention rate: 0.0 %
+preprocess_manual.js:1454 ═══════════════════════════════════════════════════════
+preprocess_manual.js:1455            BOX FILTERING COMPLETE
+preprocess_manual.js:1456 ═══════════════════════════════════════════════════════
+preprocess_manual.js:1811 
+
+
+preprocess_manual.js:1812 ═══════════════════════════════════════════════════════
+preprocess_manual.js:1813            CONFIRM BOX BUTTON CLICKED
+preprocess_manual.js:1814 ═══════════════════════════════════════════════════════
+preprocess_manual.js:1842 [STEP 1] Current BOX Settings (from UI):
+preprocess_manual.js:1843   Box Size: Object
+preprocess_manual.js:1844   Box Position: Object
+preprocess_manual.js:1845   Box Rotation (radians): Object
+preprocess_manual.js:1846   Box Rotation (degrees): Object
+preprocess_manual.js:1851   PLY Offset: Object
+preprocess_manual.js:1854 [STEP 1] Outer scope variables (for comparison):
+preprocess_manual.js:1855   boxSize: Object
+preprocess_manual.js:1856   boxPosition: Object
+preprocess_manual.js:1857   boxRotation: Object
+preprocess_manual.js:1858   plyOffset: Object
+preprocess_manual.js:1862 [STEP 2] Centered PLY Data (should be ~0,0,0):
+preprocess_manual.js:1863   Total vertices: 231474
+preprocess_manual.js:1941 [STEP 3] No PLY offset to apply
+preprocess_manual.js:1950 [STEP 4] ⭐ Transforming Box coordinates to GS local space
+preprocess_manual.js:1967 [STEP 4] Box position transformation:
+preprocess_manual.js:1968   World space: Object
+preprocess_manual.js:1969   GS local space: Object
+preprocess_manual.js:1994 [STEP 4] Box rotation transformation:
+preprocess_manual.js:1995   World space (deg): Object
+preprocess_manual.js:2000   GS local space (deg): Object
+preprocess_manual.js:537 [filterSplatsByBox] ===== FILTERING START =====
+preprocess_manual.js:538 [filterSplatsByBox] Input parameters:
+preprocess_manual.js:539   Box Size: Object
+preprocess_manual.js:540   Box Position: Object
+preprocess_manual.js:541   Box Rotation (radians): Object
+preprocess_manual.js:542   Box Rotation (degrees): Object
+preprocess_manual.js:547   Total input vertices: 231474
+preprocess_manual.js:557 [filterSplatsByBox] Box half-extents: Object
+preprocess_manual.js:558 [filterSplatsByBox] Using epsilon: 0.01
+preprocess_manual.js:565 [filterSplatsByBox] Rotation matrices created
+preprocess_manual.js:610 [DEBUG] Pre-filter summary:
+preprocess_manual.js:611   Inside: 202550
+preprocess_manual.js:612   Outside: 28924
+preprocess_manual.js:613   Boundary vertices (within 0.5m): 52505
+preprocess_manual.js:616 [DEBUG] Sample boundary vertices:
+preprocess_manual.js:618   V10: world(-1.17, 1.68, 2.06) → local(1.17, -1.68, 2.06) → IN (dist: 0.286m)
+preprocess_manual.js:618   V14: world(-1.39, 2.23, 2.64) → local(1.39, -2.23, 2.64) → OUT (dist: 0.015m)
+preprocess_manual.js:618   V15: world(-1.27, 1.95, 2.64) → local(1.27, -1.95, 2.64) → OUT (dist: 0.286m)
+preprocess_manual.js:618   V22: world(-1.19, 2.12, 2.84) → local(1.19, -2.12, 2.84) → OUT (dist: 0.130m)
+preprocess_manual.js:618   V23: world(-1.26, 2.01, 2.72) → local(1.26, -2.01, 2.72) → OUT (dist: 0.240m)
+preprocess_manual.js:618   V34: world(-1.27, 1.99, 2.70) → local(1.27, -1.99, 2.70) → OUT (dist: 0.261m)
+preprocess_manual.js:618   V35: world(-1.39, 2.06, 2.48) → local(1.39, -2.06, 2.48) → OUT (dist: 0.134m)
+preprocess_manual.js:618   V36: world(-1.23, 1.77, 2.43) → local(1.23, -1.77, 2.43) → OUT (dist: 0.076m)
+preprocess_manual.js:618   V37: world(-1.16, 1.77, 2.50) → local(1.16, -1.77, 2.50) → OUT (dist: 0.153m)
+preprocess_manual.js:618   V38: world(-1.25, 1.75, 2.38) → local(1.25, -1.75, 2.38) → OUT (dist: 0.026m)
+preprocess_manual.js:618   V39: world(-1.22, 1.76, 2.47) → local(1.22, -1.76, 2.47) → OUT (dist: 0.119m)
+preprocess_manual.js:618   V40: world(-1.22, 2.41, 1.85) → local(1.22, -2.41, 1.85) → OUT (dist: 0.165m)
+preprocess_manual.js:618   V41: world(-1.33, 1.70, 2.23) → local(1.33, -1.70, 2.23) → IN (dist: 0.120m)
+preprocess_manual.js:618   V42: world(-1.40, 1.70, 2.13) → local(1.40, -1.70, 2.13) → IN (dist: 0.221m)
+preprocess_manual.js:618   V43: world(-1.16, 1.68, 2.31) → local(1.16, -1.68, 2.31) → IN (dist: 0.038m)
+preprocess_manual.js:618   V44: world(-1.23, 1.61, 2.24) → local(1.23, -1.61, 2.24) → IN (dist: 0.107m)
+preprocess_manual.js:618   V45: world(-1.18, 1.61, 2.28) → local(1.18, -1.61, 2.28) → IN (dist: 0.067m)
+preprocess_manual.js:618   V46: world(-1.24, 1.55, 2.22) → local(1.24, -1.55, 2.22) → IN (dist: 0.135m)
+preprocess_manual.js:618   V47: world(-1.30, 1.62, 2.11) → local(1.30, -1.62, 2.11) → IN (dist: 0.239m)
+preprocess_manual.js:618   V48: world(-1.09, 2.04, 1.16) → local(1.09, -2.04, 1.16) → IN (dist: 0.215m)
+preprocess_manual.js:625 [filterSplatsByBox] Sample vertices (first 10):
+preprocess_manual.js:646   Vertex 0: Object
+preprocess_manual.js:646   Vertex 1: Object
+preprocess_manual.js:646   Vertex 2: Object
+preprocess_manual.js:646   Vertex 3: Object
+preprocess_manual.js:646   Vertex 4: Object
+preprocess_manual.js:646   Vertex 5: Object
+preprocess_manual.js:646   Vertex 6: Object
+preprocess_manual.js:646   Vertex 7: Object
+preprocess_manual.js:646   Vertex 8: Object
+preprocess_manual.js:646   Vertex 9: Object
+preprocess_manual.js:681 [filterSplatsByBox] ===== FILTERING COMPLETE =====
+preprocess_manual.js:682 [filterSplatsByBox] Results:
+preprocess_manual.js:683   Filtered: 202550 / 231474
+preprocess_manual.js:684   Retention rate: 87.5 %
+preprocess_manual.js:700 [filterSplatsByBox] Filtered bounds (world space):
+preprocess_manual.js:701   X: -1.400 to 2.071 (size: 3.470 )
+preprocess_manual.js:702   Y: -0.542 to 2.260 (size: 2.802 )
+preprocess_manual.js:703   Z: -0.838 to 2.360 (size: 3.198 )
+preprocess_manual.js:704   Center: Object
+preprocess_manual.js:710 [filterSplatsByBox] ℹ️ Box is rotated - World-space bounds will differ from box size
+preprocess_manual.js:2038 [STEP 4] ✓ Filtering complete: 202550 splats kept
+preprocess_manual.js:2048 [STEP 5] Centering splats...
+preprocess_manual.js:2066 [STEP 5] Before centering: Object
+preprocess_manual.js:2076 [STEP 5] ✓ Splats centered to origin
+preprocess_manual.js:2079 [STEP 6] Saving filtered PLY...
+preprocess_manual.js:770 [downloadPLY] Downloaded: 513a1be2-32e6-405e-aec0-47de526c5c35_filtered_2025-12-18T04-59-32.ply
+preprocess_manual.js:2102 [STEP 6] ✓ PLY saved: 513a1be2-32e6-405e-aec0-47de526c5c35_filtered_2025-12-18T04-59-32.ply
+preprocess_manual.js:2103 [STEP 6] Statistics:
+preprocess_manual.js:2104   Original: 231474 vertices
+preprocess_manual.js:2105   Filtered: 202550 vertices
+preprocess_manual.js:2106   Reduction: 12.5 %
+preprocess_manual.js:2117 [STEP 7] Loading filtered splats into viewer...
+preprocess_manual.js:2130 [STEP 7] ✓ Filtered GS loaded
+preprocess_manual.js:2136 [STEP 7] ✓ VRM loaded
+preprocess_manual.js:2143 ═══════════════════════════════════════════════════════
+preprocess_manual.js:2144            BOX FILTERING COMPLETE
+preprocess_manual.js:2145 ═══════════════════════════════════════════════════════
+preprocess_manual.js:2146 
+
+
+preprocess_manual.js:2201 [setupBoneAssignment] Starting bone assignment...
+preprocess_manual.js:2233 [calculateOptimalRadius] Object size: Object
+preprocess_manual.js:2234 [calculateOptimalRadius] Optimal radius: 0.17 m
+preprocess_manual.js:2265 [setupBoneAssignment] Attempting to load default.json...
+main.js:544 [MAIN] preprocessManual returned: Object
+main.js:552 [MAIN] Manual preprocessing succeeded, setting up GVRM
+preprocess_manual.js:2275 [setupBoneAssignment] ✓ default.json loaded successfully
+preprocess_manual.js:2286 [setupBoneAssignment] Applying bone operations...
+preprocess_manual.js:2302 [setupBoneAssignment] Available bones: 54
+preprocess_manual.js:2303 [setupBoneAssignment] Bone names: Array(54)
+preprocess_manual.js:2348 [updateBoneSelector] Updating for mode: required19
+preprocess_manual.js:2360 [updateBoneSelector] Added 20 groups
+preprocess_manual.js:2874 [setupBoneAssignment] ✓ Improved splat selection system initialized
+preprocess_manual.js:2875 [setupBoneAssignment] Features:
+preprocess_manual.js:2876   - Finds nearest splat within 50px (adjustable)
+preprocess_manual.js:2877   - Paint mode with drag support
+preprocess_manual.js:2878   - Smooth brush strokes with interpolation
+preprocess_manual.js:2879   - Sphere selection with improved center detection
+preprocess_manual.js:2888 [setupBoneAssignment] Camera controls initialized
+preprocess_manual.js:2901 [setupBoneAssignment] Setting up camera lock...
+preprocess_manual.js:2908 [setupBoneAssignment] ✓ Camera lock button found
+preprocess_manual.js:2972 [setupBoneAssignment] ✓ Camera lock button configured
+preprocess_manual.js:2973 [setupBoneAssignment] Initial state: UNLOCKED
+preprocess_manual.js:2410 [setupBoneAssignment] Paint mode enabled
+preprocess_manual.js:2395 [setupBoneAssignment] Selected target: group_0
+preprocess_manual.js:2769 Uncaught ReferenceError: getTargetColor is not defined
+    at applyAssignmentToIndices (preprocess_manual.js:2769:25)
+    at handlePaintAtPosition (preprocess_manual.js:2736:5)
+    at HTMLCanvasElement.<anonymous> (preprocess_manual.js:2695:3)Understand this error
+preprocess_manual.js:2995 [setupBoneAssignment] Assigning splats around center to group_0
+preprocess_manual.js:3015 [setupBoneAssignment] Group: 1. Head Bones: Array(1)
+preprocess_manual.js:2815 [Sphere Selection] Mode activated, radius: 0.1735071063041687 m
+preprocess_manual.js:2816 [Sphere Selection] Click on a splat to select all nearby splats
+preprocess_manual.js:3258 [setupBoneAssignment] Sphere selection mode activated
+preprocess_manual.js:2769 Uncaught ReferenceError: getTargetColor is not defined
+    at applyAssignmentToIndices (preprocess_manual.js:2769:25)
+    at handlePaintAtPosition (preprocess_manual.js:2736:5)
+    at HTMLCanvasElement.<anonymous> (preprocess_manual.js:2695:3)Understand this error
+preprocess_manual.js:2995 [setupBoneAssignment] Assigning splats around center to group_0
+preprocess_manual.js:3015 [setupBoneAssignment] Group: 1. Head Bones: Array(1)
+preprocess_manual.js:2495 [findNearestSplat] Searching for splat near mouse: Object
+preprocess_manual.js:2550 [findNearestSplat] ✓ Found nearest splat: Object
+preprocess_manual.js:2842 [Sphere Selection] Center splat: 23448 at Ci
+preprocess_manual.js:2593 [findSplatsInSphere] Found 1854 splats within radius 0.17 m
+preprocess_manual.js:2769 Uncaught ReferenceError: getTargetColor is not defined
+    at applyAssignmentToIndices (preprocess_manual.js:2769:25)
+    at HTMLCanvasElement.onSphereClick (preprocess_manual.js:2855:7)Understand this error
+preprocess_manual.js:2769 Uncaught ReferenceError: getTargetColor is not defined
+    at applyAssignmentToIndices (preprocess_manual.js:2769:25)
+    at handlePaintAtPosition (preprocess_manual.js:2736:5)
+    at HTMLCanvasElement.<anonymous> (preprocess_manual.js:2695:3)Understand this error
+preprocess_manual.js:2995 [setupBoneAssignment] Assigning splats around center to group_0
+preprocess_manual.js:3015 [setupBoneAssignment] Group: 1. Head Bones: Array(1)
+preprocess_manual.js:2495 [findNearestSplat] Searching for splat near mouse: Object
+preprocess_manual.js:2550 [findNearestSplat] ✓ Found nearest splat: Object
+preprocess_manual.js:2842 [Sphere Selection] Center splat: 150111 at Ci
+preprocess_manual.js:2593 [findSplatsInSphere] Found 145978 splats within radius 2.00 m
+preprocess_manual.js:2769 Uncaught ReferenceError: getTargetColor is not defined
+    at applyAssignmentToIndices (preprocess_manual.js:2769:25)
+    at HTMLCanvasElement.onSphereClick (preprocess_manual.js:2855:7)Understand this error
+preprocess_manual.js:2769 Uncaught ReferenceError: getTargetColor is not defined
+    at applyAssignmentToIndices (preprocess_manual.js:2769:25)
+    at handlePaintAtPosition (preprocess_manual.js:2736:5)
+    at HTMLCanvasElement.<anonymous> (preprocess_manual.js:2695:3)Understand this error
+preprocess_manual.js:2495 [findNearestSplat] Searching for splat near mouse: Object
+preprocess_manual.js:2550 [findNearestSplat] ✓ Found nearest splat: Object
+preprocess_manual.js:2842 [Sphere Selection] Center splat: 30800 at Ci
+preprocess_manual.js:2593 [findSplatsInSphere] Found 130 splats within radius 1.10 m
+preprocess_manual.js:2769 Uncaught ReferenceError: getTargetColor is not defined
+    at applyAssignmentToIndices (preprocess_manual.js:2769:25)
+    at HTMLCanvasElement.onSphereClick (preprocess_manual.js:2855:7)Understand this error
+preprocess_manual.js:2738 [Paint] No splats found under cursor
+preprocess_manual.js:2495 [findNearestSplat] Searching for splat near mouse: ObjectmouseX: -0.02228024368497783mouseY: -0.2568627450980392[[Prototype]]: Object
+preprocess_manual.js:2550 [findNearestSplat] ✓ Found nearest splat: Objectindex: 31753screenDistance: "85.3px"worldDistance: "17.981m"[[Prototype]]: Object
+preprocess_manual.js:2842 [Sphere Selection] Center splat: 31753 at Cix: 0.12565886974334717y: -0.028607049956917763z: 1.6636425256729126[[Prototype]]: Object
+preprocess_manual.js:2593 [findSplatsInSphere] Found 4748 splats within radius 1.10 m
+preprocess_manual.js:2769 Uncaught ReferenceError: getTargetColor is not defined
+    at applyAssignmentToIndices (preprocess_manual.js:2769:25)
+    at HTMLCanvasElement.onSphereClick (preprocess_manual.js:2855:7)Understand this error

preprocess_manual.js

@@ -2291,7 +2291,6 @@ function setupBoneAssignment(ui, scene, camera, renderer, gvrm, character, filte
 
       character.currentVrm.scene.updateMatrixWorld(true);
 
-      
       // Get VRM bone information
       const humanBones = character.currentVrm.humanoid.humanBones;
       const boneNames = Object.keys(humanBones);
@@ -2472,9 +2471,416 @@ function setupBoneAssignment(ui, scene, camera, renderer, gvrm, character, filte
         // ========================================
         // Raycaster Setup
         // ========================================
+        ////ここから
         const raycaster = new THREE.Raycaster();
         const mouse = new THREE.Vector2();
 
+//////挿入箇所start
+
+// ========================================
+// 改善されたスプラット選択機能
+// setupBoneAssignment関数内のマウスクリック処理を置き換えてください
+// ========================================
+
+/**
+ * 2D画面座標から最も近い3D Splatを検索
+ * @param {number} mouseX - 正規化されたマウスX座標 (-1 to 1)
+ * @param {number} mouseY - 正規化されたマウスY座標 (-1 to 1)
+ * @param {THREE.Camera} camera - カメラオブジェクト
+ * @param {Object} filteredGs - Gaussian Splat データ
+ * @param {number} maxScreenDistance - 最大許容画面距離（ピクセル、デフォルト50px）
+ * @returns {Object|null} { index, screenDistance, worldDistance } or null
+ */
+function findNearestSplat(mouseX, mouseY, camera, filteredGs, maxScreenDistance = 50) {
+  console.log('[findNearestSplat] Searching for splat near mouse:', { mouseX, mouseY });
+  
+  // スクリーン座標をピクセル座標に変換
+  const canvas = renderer.domElement;
+  const mousePixelX = (mouseX + 1) * canvas.width / 2;
+  const mousePixelY = (-mouseY + 1) * canvas.height / 2;
+  
+  let nearestSplatIndex = -1;
+  let nearestScreenDist = Infinity;
+  let nearestWorldDist = Infinity;
+  
+  // カメラ位置
+  const cameraPos = camera.position;
+  
+  // 一時的なVector3オブジェクト（パフォーマンス最適化）
+  const worldPos = new THREE.Vector3();
+  const screenPos = new THREE.Vector3();
+  
+  // 全てのsplatをチェック
+  for (let i = 0; i < filteredGs.splatCount; i++) {
+    // Splatのワールド座標を取得
+    worldPos.x = filteredGs.centers0[i * 3 + 0];
+    worldPos.y = filteredGs.centers0[i * 3 + 1];
+    worldPos.z = filteredGs.centers0[i * 3 + 2];
+    
+    // ワールド座標 → スクリーン座標に変換
+    screenPos.copy(worldPos);
+    screenPos.project(camera);
+    
+    // カメラの背後にあるsplatは除外
+    if (screenPos.z > 1) continue;
+    
+    // 正規化座標 → ピクセル座標
+    const screenPixelX = (screenPos.x + 1) * canvas.width / 2;
+    const screenPixelY = (-screenPos.y + 1) * canvas.height / 2;
+    
+    // マウスとの2D距離（画面上）
+    const dx = screenPixelX - mousePixelX;
+    const dy = screenPixelY - mousePixelY;
+    const screenDist = Math.sqrt(dx * dx + dy * dy);
+    
+    // 最大許容距離以内で、最も近いものを記録
+    if (screenDist < maxScreenDistance && screenDist < nearestScreenDist) {
+      nearestScreenDist = screenDist;
+      nearestSplatIndex = i;
+      
+      // ワールド空間での距離も計算
+      const worldDx = worldPos.x - cameraPos.x;
+      const worldDy = worldPos.y - cameraPos.y;
+      const worldDz = worldPos.z - cameraPos.z;
+      nearestWorldDist = Math.sqrt(worldDx * worldDx + worldDy * worldDy + worldDz * worldDz);
+    }
+  }
+  
+  if (nearestSplatIndex >= 0) {
+    console.log('[findNearestSplat] ✓ Found nearest splat:', {
+      index: nearestSplatIndex,
+      screenDistance: nearestScreenDist.toFixed(1) + 'px',
+      worldDistance: nearestWorldDist.toFixed(3) + 'm'
+    });
+    
+    return {
+      index: nearestSplatIndex,
+      screenDistance: nearestScreenDist,
+      worldDistance: nearestWorldDist
+    };
+  }
+  
+  console.log('[findNearestSplat] ✗ No splat found within', maxScreenDistance, 'px');
+  return null;
+}
+
+/**
+ * 球体範囲内の全Splatを検索
+ * @param {THREE.Vector3} center - 球の中心座標
+ * @param {number} radius - 球の半径
+ * @param {Object} filteredGs - Gaussian Splat データ
+ * @returns {Array<number>} Splat インデックスの配列
+ */
+function findSplatsInSphere(center, radius, filteredGs) {
+  const indicesInSphere = [];
+  const radiusSquared = radius * radius;
+  
+  for (let i = 0; i < filteredGs.splatCount; i++) {
+    const x = filteredGs.centers0[i * 3 + 0];
+    const y = filteredGs.centers0[i * 3 + 1];
+    const z = filteredGs.centers0[i * 3 + 2];
+    
+    const dx = x - center.x;
+    const dy = y - center.y;
+    const dz = z - center.z;
+    const distSquared = dx * dx + dy * dy + dz * dz;
+    
+    if (distSquared <= radiusSquared) {
+      indicesInSphere.push(i);
+    }
+  }
+  
+  console.log('[findSplatsInSphere] Found', indicesInSphere.length, 'splats within radius', radius.toFixed(2), 'm');
+  return indicesInSphere;
+}
+
+/**
+ * ペイントモード用: マウスパスに沿ってSplatを塗る
+ * @param {number} mouseX - 正規化マウスX
+ * @param {number} mouseY - 正規化マウスY
+ * @param {number} lastMouseX - 前のマウスX
+ * @param {number} lastMouseY - 前のマウスY
+ * @param {THREE.Camera} camera
+ * @param {Object} filteredGs
+ * @param {number} brushRadius - ブラシ半径（ピクセル、デフォルト30px）
+ * @returns {Array<number>} 影響を受けたSplatインデックス
+ */
+function findSplatsAlongMousePath(mouseX, mouseY, lastMouseX, lastMouseY, camera, filteredGs, brushRadius = 30) {
+  const affectedSplats = new Set();
+  
+  // パスを補間（滑らかなストロークのため）
+  const steps = 5;
+  for (let step = 0; step <= steps; step++) {
+    const t = step / steps;
+    const interpX = lastMouseX + (mouseX - lastMouseX) * t;
+    const interpY = lastMouseY + (mouseY - lastMouseY) * t;
+    
+    // この位置の周辺Splatを検索
+    const result = findNearestSplatWithRadius(interpX, interpY, camera, filteredGs, brushRadius);
+    if (result && result.indices) {
+      result.indices.forEach(idx => affectedSplats.add(idx));
+    }
+  }
+  
+  return Array.from(affectedSplats);
+}
+
+/**
+ * ブラシ半径内の全Splatを返す
+ * @param {number} mouseX - 正規化マウスX
+ * @param {number} mouseY - 正規化マウスY
+ * @param {THREE.Camera} camera
+ * @param {Object} filteredGs
+ * @param {number} brushRadius - ブラシ半径（ピクセル）
+ * @returns {Object|null} { indices: Array<number> } or null
+ */
+function findNearestSplatWithRadius(mouseX, mouseY, camera, filteredGs, brushRadius) {
+  const canvas = renderer.domElement;
+  const mousePixelX = (mouseX + 1) * canvas.width / 2;
+  const mousePixelY = (-mouseY + 1) * canvas.height / 2;
+  
+  const affectedIndices = [];
+  const worldPos = new THREE.Vector3();
+  const screenPos = new THREE.Vector3();
+  
+  for (let i = 0; i < filteredGs.splatCount; i++) {
+    worldPos.x = filteredGs.centers0[i * 3 + 0];
+    worldPos.y = filteredGs.centers0[i * 3 + 1];
+    worldPos.z = filteredGs.centers0[i * 3 + 2];
+    
+    screenPos.copy(worldPos);
+    screenPos.project(camera);
+    
+    if (screenPos.z > 1) continue;
+    
+    const screenPixelX = (screenPos.x + 1) * canvas.width / 2;
+    const screenPixelY = (-screenPos.y + 1) * canvas.height / 2;
+    
+    const dx = screenPixelX - mousePixelX;
+    const dy = screenPixelY - mousePixelY;
+    const screenDist = Math.sqrt(dx * dx + dy * dy);
+    
+    if (screenDist < brushRadius) {
+      affectedIndices.push(i);
+    }
+  }
+  
+  return affectedIndices.length > 0 ? { indices: affectedIndices } : null;
+}
+
+// ========================================
+// マウスクリック/ドラッグイベント処理の改善例
+// ========================================
+
+// グローバル変数
+let lastPaintMouseX = null;
+let lastPaintMouseY = null;
+
+// マウスダウンイベント
+renderer.domElement.addEventListener('mousedown', (event) => {
+  if (!isPaintMode || !selectedTarget) return;
+  
+  isPainting = true;
+  paintModeEraser = event.shiftKey;
+  
+  // マウス座標を正規化
+  const rect = renderer.domElement.getBoundingClientRect();
+  mouse.x = ((event.clientX - rect.left) / rect.width) * 2 - 1;
+  mouse.y = -((event.clientY - rect.top) / rect.height) * 2 + 1;
+  
+  lastPaintMouseX = mouse.x;
+  lastPaintMouseY = mouse.y;
+  
+  // 最初のクリック位置でペイント
+  handlePaintAtPosition(mouse.x, mouse.y);
+});
+
+// マウスムーブイベント（ドラッグ中）
+renderer.domElement.addEventListener('mousemove', (event) => {
+  if (!isPainting || !isPaintMode) return;
+  
+  const rect = renderer.domElement.getBoundingClientRect();
+  mouse.x = ((event.clientX - rect.left) / rect.width) * 2 - 1;
+  mouse.y = -((event.clientY - rect.top) / rect.height) * 2 + 1;
+  
+  // パスに沿ってペイント
+  const affectedIndices = findSplatsAlongMousePath(
+    mouse.x, mouse.y,
+    lastPaintMouseX, lastPaintMouseY,
+    camera, filteredGs,
+    30 // ブラシ半径30px
+  );
+  
+  if (affectedIndices.length > 0) {
+    applyAssignmentToIndices(affectedIndices, selectedTarget, paintModeEraser);
+  }
+  
+  lastPaintMouseX = mouse.x;
+  lastPaintMouseY = mouse.y;
+});
+
+// マウスアップイベント
+renderer.domElement.addEventListener('mouseup', () => {
+  isPainting = false;
+  lastPaintMouseX = null;
+  lastPaintMouseY = null;
+});
+
+/**
+ * ペイント処理を実行
+ */
+function handlePaintAtPosition(mouseX, mouseY) {
+  const result = findNearestSplatWithRadius(mouseX, mouseY, camera, filteredGs, 30);
+  
+  if (result && result.indices.length > 0) {
+    applyAssignmentToIndices(result.indices, selectedTarget, paintModeEraser);
+  } else {
+    console.log('[Paint] No splats found under cursor');
+  }
+}
+
+/**
+ * Splatに割り当てを適用
+ */
+function applyAssignmentToIndices(indices, target, isEraser) {
+  if (isEraser) {
+    // 消しゴムモード: 割り当て解除
+    indices.forEach(idx => {
+      if (assignmentData.splatBoneIndices[idx] >= 0) {
+        const oldBoneName = getBoneNameFromIndex(assignmentData.splatBoneIndices[idx]);
+        if (assignmentData.boneAssignments[oldBoneName]) {
+          const arrayIdx = assignmentData.boneAssignments[oldBoneName].indexOf(idx);
+          if (arrayIdx >= 0) {
+            assignmentData.boneAssignments[oldBoneName].splice(arrayIdx, 1);
+          }
+        }
+        assignmentData.splatBoneIndices[idx] = -1;
+        
+        // 色を元に戻す
+        filteredGs.colors[idx * 4 + 0] = 255;
+        filteredGs.colors[idx * 4 + 1] = 255;
+        filteredGs.colors[idx * 4 + 2] = 255;
+      }
+    });
+    
+    console.log('[Paint] Erased', indices.length, 'splats');
+  } else {
+    // 通常モード: 割り当て
+    const targetColor = getTargetColor(target);
+    const boneIndices = getTargetBoneIndices(target);
+    
+    indices.forEach(idx => {
+      assignmentData.splatBoneIndices[idx] = boneIndices[0]; // 最初のボーン
+      
+      // 色を適用
+      filteredGs.colors[idx * 4 + 0] = targetColor[0];
+      filteredGs.colors[idx * 4 + 1] = targetColor[1];
+      filteredGs.colors[idx * 4 + 2] = targetColor[2];
+      
+      // 記録
+      boneIndices.forEach(boneIdx => {
+        const boneName = getBoneNameFromIndex(boneIdx);
+        if (!assignmentData.boneAssignments[boneName]) {
+          assignmentData.boneAssignments[boneName] = [];
+        }
+        if (!assignmentData.boneAssignments[boneName].includes(idx)) {
+          assignmentData.boneAssignments[boneName].push(idx);
+        }
+      });
+    });
+    
+    console.log('[Paint] Painted', indices.length, 'splats with', target);
+  }
+  
+  // スプラットの色を更新
+  filteredGs.splatMesh.updateDataTexturesFromBaseData(0, filteredGs.splatCount - 1);
+  updateStats();
+}
+
+// ========================================
+// 球体選択モード（元のコード互換）
+// ========================================
+
+// Sphere Selection Button
+const selectSphereBtn = document.getElementById('select-sphere-btn');
+
+if (selectSphereBtn) {
+  selectSphereBtn.addEventListener('click', () => {
+    if (!selectedTarget) {
+      alert('Please select a target bone or group first!');
+      return;
+    }
+    
+    selectionMode = 'sphere';
+    console.log('[Sphere Selection] Mode activated, radius:', selectionRadius, 'm');
+    console.log('[Sphere Selection] Click on a splat to select all nearby splats');
+    
+    // One-time click listener
+    const onSphereClick = (event) => {
+      const rect = renderer.domElement.getBoundingClientRect();
+      mouse.x = ((event.clientX - rect.left) / rect.width) * 2 - 1;
+      mouse.y = -((event.clientY - rect.top) / rect.height) * 2 + 1;
+      
+      // ⭐ 改善: 最も近いsplatを見つける
+      const nearestResult = findNearestSplat(mouse.x, mouse.y, camera, filteredGs, 100);
+      
+      if (!nearestResult) {
+        alert('No splat found near click. Please click closer to the object.');
+        renderer.domElement.removeEventListener('click', onSphereClick);
+        selectionMode = null;
+        return;
+      }
+      
+      const centerIdx = nearestResult.index;
+      
+      // 中心点の座標
+      const centerX = filteredGs.centers0[centerIdx * 3 + 0];
+      const centerY = filteredGs.centers0[centerIdx * 3 + 1];
+      const centerZ = filteredGs.centers0[centerIdx * 3 + 2];
+      const center = new THREE.Vector3(centerX, centerY, centerZ);
+      
+      console.log('[Sphere Selection] Center splat:', centerIdx, 'at', center);
+      
+      // 球体範囲内のsplatを検索
+      const indicesInSphere = findSplatsInSphere(center, selectionRadius, filteredGs);
+      
+      if (indicesInSphere.length === 0) {
+        alert('No splats found in sphere. Try increasing the radius.');
+        renderer.domElement.removeEventListener('click', onSphereClick);
+        selectionMode = null;
+        return;
+      }
+      
+      // 割り当てを実行
+      applyAssignmentToIndices(indicesInSphere, selectedTarget, false);
+      
+      // 履歴に記録
+      assignmentData.history.push({
+        action: 'sphere_select',
+        indices: [...indicesInSphere],
+        target: selectedTarget
+      });
+      
+      console.log('[Sphere Selection] Completed:', indicesInSphere.length, 'splats assigned');
+      
+      renderer.domElement.removeEventListener('click', onSphereClick);
+      selectionMode = null;
+    };
+    
+    renderer.domElement.addEventListener('click', onSphereClick);
+  });
+}
+
+console.log('[setupBoneAssignment] ✓ Improved splat selection system initialized');
+console.log('[setupBoneAssignment] Features:');
+console.log('  - Finds nearest splat within 50px (adjustable)');
+console.log('  - Paint mode with drag support');
+console.log('  - Smooth brush strokes with interpolation');
+console.log('  - Sphere selection with improved center detection');
+
+
+///////挿入箇所end
+
         // ========================================
         // ⭐ Camera Controls Setup
         // ========================================
@@ -2838,7 +3244,6 @@ function setupBoneAssignment(ui, scene, camera, renderer, gvrm, character, filte
       // ========================================
       // Sphere Selection Mode Button
       // ========================================
-      const selectSphereBtn = document.getElementById('select-sphere-btn');
       
       if (selectSphereBtn) {
         selectSphereBtn.addEventListener('click', () => {