From 9bf88a83d360a54195bd70a78b172bd69cfeb258 Mon Sep 17 00:00:00 2001
From: JOJO <1498581755@qq.com>
Date: Thu, 6 Aug 2026 02:57:57 +0800
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---
 star-raid/js/render.js | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/star-raid/js/render.js b/star-raid/js/render.js
index 23add58..658a4d9 100644
--- a/star-raid/js/render.js
+++ b/star-raid/js/render.js
@@ -293,8 +293,8 @@ function drawProgenitor(b,t,fl,tf){ // 太空原种·装甲虫兽（tf 0=装甲
   if(tf>0){ctx.globalAlpha=tf*0.9;
     poly([0,-36,9,-29,11,-14,10,2,9,14,7,16,-7,16,-9,14,-10,2,-11,-14,-9,-29],"#c8202e");
     px(-2,-30,4,45,"#e8393a");ctx.globalAlpha=1;}
-  // —— 背甲两瓣：沿背脊中线裂开，P2向外滑开（同一多边形平移） ——
-  for(const sd of[-1,1]){ctx.save();ctx.translate(sd*tf*7,0);
+  // —— 背甲两瓣：绕尾端枢轴楔开（顶端外摆露血肉、尾端原地不动，衔接处不变宽；同一几何体旋转） ——
+  for(const sd of[-1,1]){ctx.save();ctx.translate(0,14);ctx.rotate(sd*tf*0.28);ctx.translate(0,-14);
     poly([0,-40,sd*11,-37,sd*15,-28,sd*13,-12,sd*12,4,sd*11,14,0,14],sd<0?"#c9d6e2":"#9fb0c2");   // 末端平边与尾节同材质（#c9d6e2）
     px(sd<0?-11:0,12,11,2,sd<0?"#e8f0f6":"#8498ac");   // 底缘左亮右暗（与尾节描边一致，接缝读作甲片缝）
     poly([0,-40,sd*11,-37,sd*15,-28,sd*7,-26,sd*5,-36],"#e8f0f6");   // 受光斜面