From d714e9fa5f5ca0ee429e31fdb95127b9c4ac9e4f Mon Sep 17 00:00:00 2001
From: pearmini <subairui@icloud.com>
Date: Sun, 20 Oct 2024 15:58:04 -0400
Subject: [PATCH] Fix group transform without data

---
 src/shapes/group.js | 2 +-
 test/apps/spin.js   | 7 +++++--
 2 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/shapes/group.js b/src/shapes/group.js
index c1837388..93989689 100644
--- a/src/shapes/group.js
+++ b/src/shapes/group.js
@@ -16,7 +16,7 @@ function mergeMatrix(I, PM = [], M = []) {
 
 function withTransform({x, y, rotate}, ...flows) {
   return (raw) => {
-    const {data, x: px, y: py, rotate: protate, ...rest} = raw ?? {data: [0]};
+    const {data = [0], x: px, y: py, rotate: protate, ...rest} = raw ?? {};
     const I = Array.from({length: data.length}, (_, i) => i);
     const transform = (context, _, value) => {
       const {x: X = [], y: Y = [], rotate: R = []} = value;
diff --git a/test/apps/spin.js b/test/apps/spin.js
index 4909e47e..169d1f9a 100644
--- a/test/apps/spin.js
+++ b/test/apps/spin.js
@@ -8,8 +8,11 @@ export function spin() {
       const t = Date.now() / 1000;
       return cm.group(
         cm.background({fill: "white"}),
-        cm.circle({x: 320, y: 320, r: 120, fill: "black"}),
-        cm.circle({x: 320 + Math.cos(t) * 200, y: 320 + Math.sin(t) * 200, r: 40, fill: "black"}),
+        cm.group(
+          {x: 320, y: 320},
+          cm.circle({x: 0, y: 0, r: 120, fill: "black"}),
+          cm.circle({x: Math.cos(t) * 200, y: Math.sin(t) * 200, r: 40, fill: "black"}),
+        ),
       );
     },
   });