feat: Add tank textures with connected border rendering

.gitignore

@@ -23,6 +23,7 @@ classes/
 bin/
 .classpath
 .project
+.factorypath
 
 # macos
 
@@ -35,6 +36,7 @@ run/
 # loom decompiled sources
 
 /net/
+/temp
 
 # datagen
 

CLAUDE.md

@@ -72,6 +72,15 @@ These steps are mandatory after every code modification.
 
 **Note**: If required checks cannot be executed locally, GitHub Actions results can be used as an alternative. Verify code quality and build success through CI/CD execution results.
 
+## Scripts
+
+`scripts/` ディレクトリにはユーティリティスクリプトが格納されている。全て PEP 723 インラインメタデータで依存関係を記述しており、`uv run` で再現性のある実行が可能。
+
+- **`generate_textures.py`** - タンクブロックのテクスチャ (PNG) を生成する
+    - 実行: `uv run scripts/generate_textures.py`
+    - 出力先: `src/main/resources/assets/connectedtank/textures/block/`
+    - ティア定義は `TankTier.kt` と同期が必要
+
 ## Development Documentation
 Useful development manuals are available in the `docs/` directory:
 - **`MinecraftSourceExploration.md`** - Minecraft source code analysis techniques

scripts/generate_textures.py

@@ -0,0 +1,84 @@
+# /// script
+# requires-python = ">=3.12"
+# dependencies = [
+#     "pillow>=11.0.0",
+# ]
+# ///
+"""Generate tank block textures for each tier.
+
+Tier IDs must match TankTier.kt enum values.
+When adding/changing tiers, update both this file and TankTier.kt.
+"""
+
+import os
+from pathlib import Path
+
+from PIL import Image
+
+REPO_ROOT = Path(__file__).resolve().parent.parent
+OUTPUT_DIR = (
+    REPO_ROOT
+    / "src"
+    / "main"
+    / "resources"
+    / "assets"
+    / "connectedtank"
+    / "textures"
+    / "block"
+)
+
+# Tier definitions: (id, frame_color_rgb, gauge_color_rgb)
+# Colors based on the Minecraft material used for each tier
+TIERS = [
+    ("connected_tank", (139, 105, 20), (160, 130, 50)),  # Oak wood brown
+    ("stone_connected_tank", (127, 127, 127), (150, 150, 150)),  # Stone gray
+    ("copper_connected_tank", (184, 115, 51), (210, 140, 70)),  # Copper orange
+    ("iron_connected_tank", (216, 216, 216), (230, 230, 230)),  # Iron silver
+    ("gold_connected_tank", (255, 215, 0), (255, 235, 80)),  # Gold yellow
+    ("diamond_connected_tank", (90, 234, 234), (130, 245, 245)),  # Diamond cyan
+    ("netherite_connected_tank", (61, 49, 41), (90, 72, 60)),  # Netherite dark
+]
+
+
+def create_side_texture(gauge_color):
+    """Create a 16x16 side texture with gauge marks only (no border)."""
+    img = Image.new("RGBA", (16, 16), (0, 0, 0, 0))
+
+    ga = gauge_color + (255,)
+
+    # Gauge marks on left edge (x=0)
+    # Major marks at y=4, y=8, y=12 (3px wide)
+    for tick_y in [4, 8, 12]:
+        for dx in range(3):
+            img.putpixel((dx, tick_y), ga)
+
+    # Minor marks at y=2, y=6, y=10, y=14 (2px wide)
+    for tick_y in [2, 6, 10, 14]:
+        for dx in range(2):
+            img.putpixel((dx, tick_y), ga)
+
+    return img
+
+
+def create_frame_texture(frame_color):
+    """Create a 16x16 solid color texture for border overlays."""
+    img = Image.new("RGBA", (16, 16), frame_color + (255,))
+    return img
+
+
+def main():
+    os.makedirs(OUTPUT_DIR, exist_ok=True)
+
+    for tier_id, frame_color, gauge_color in TIERS:
+        side = create_side_texture(gauge_color)
+        frame = create_frame_texture(frame_color)
+
+        side.save(OUTPUT_DIR / f"{tier_id}_side.png")
+        frame.save(OUTPUT_DIR / f"{tier_id}_frame.png")
+        print(f"Generated: {tier_id}")
+
+    print("Done!")
+
+
+if __name__ == "__main__":
+    main()