feat(desktop): 村民与主角四帧行走动画

人物图集 5 变体 x 4 向 x 4 帧（2560x48，全部经 make-jiangnan-art.py 原创，四种腿步：站立/左跨/站立微跳/右跨镜像）；animationFrame 按 tick/4 mod 4 确定性取帧（16 tick 一循环，禁实时时钟）；快照式回归断言四帧循环与逐帧图集列映射，主角同规则。

1 files changed, 11 insertions, 5 deletions

diff --git a/scripts/make-jiangnan-art.py b/scripts/make-jiangnan-art.py
index cdae4e9..c484d91 100644
--- a/scripts/make-jiangnan-art.py
+++ b/scripts/make-jiangnan-art.py
@@ -3,7 +3,7 @@
 
 Generates three RGBA PNGs into src/LivingVillage.Desktop/Assets:
   jiangnan-world.png     672x32  (21 ground/prop tiles, 32px each)
-  jiangnan-characters.png 1280x48 (5 variants x 4 directions x 2 frames, 32x48 cells)
+  jiangnan-characters.png 2560x48 (5 variants x 4 directions x 4 frames, 32x48 cells)
   jiangnan-interior.png  392x96  (variable-size bottom-aligned interior cells)
 
 Cell geometry is mirrored in VillageArt.fs; keep both in sync.
@@ -445,6 +445,7 @@ DIRECTIONS = ["north", "south", "west", "east"]
 
 
 def draw_character_cell(c, ox, variant, direction, frame):
+    # frame: 0 neutral stand, 1 left stride, 2 neutral stand (higher torso bob), 3 right stride
     robe = variant["robe"]
     light = variant["light"]
     dark = variant["dark"]
@@ -456,15 +457,20 @@ def draw_character_cell(c, ox, variant, direction, frame):
     c.rect(ox + 8, 44, 16, 1, (23, 31, 34, 110))
     c.rect(ox + 10, 45, 12, 1, (23, 31, 34, 90))
 
-    if frame == 0:
+    if frame in (0, 2):
         c.rect(ox + 10, 36, 4, 7, dark)
         c.rect(ox + 9, 42, 6, 3, SHOE)
         c.rect(ox + 18, 36, 4, 5, dark)
         c.rect(ox + 18, 39, 6, 3, SHOE)
+    elif frame == 1:
+        c.rect(ox + 9, 36, 5, 7, dark)
+        c.rect(ox + 9, 42, 6, 3, SHOE)
+        c.rect(ox + 18, 36, 3, 5, dark)
+        c.rect(ox + 18, 39, 6, 3, SHOE)
     else:
         c.rect(ox + 18, 36, 4, 7, dark)
         c.rect(ox + 18, 42, 6, 3, SHOE)
-        c.rect(ox + 10, 36, 4, 5, dark)
+        c.rect(ox + 12, 36, 3, 5, dark)
         c.rect(ox + 10, 39, 6, 3, SHOE)
 
     c.rect(ox + 7, 22, 18, 14, robe)
@@ -531,7 +537,7 @@ def draw_character_cell(c, ox, variant, direction, frame):
 
 
 def build_character_atlas():
-    c = Canvas(1280, 48)
+    c = Canvas(2560, 48)
     cell = 0
     for variant in VARIANTS:
         for direction in DIRECTIONS:
@@ -674,7 +680,7 @@ def main():
     ASSET_DIR.mkdir(parents=True, exist_ok=True)
     targets = [
         ("jiangnan-world.png", build_world_atlas(), 672, 32),
-        ("jiangnan-characters.png", build_character_atlas(), 1280, 48),
+        ("jiangnan-characters.png", build_character_atlas(), 2560, 48),
         ("jiangnan-interior.png", build_interior_atlas(), 392, 96),
     ]
     for name, canvas, w, h in targets: