Try   HackMD
  1. Select your object

  2. Make a new node tree for it by pressing 'New' in the geometry nodes editor

  3. Press Shift+A,S to add

    1. 'Curve Circle',
      參數圓:三角形、四角形、五角形、六角形
    2. 'Curve to Points',
      曲線轉點
    3. 'Instance on Points' nodes
      點上長東西
    4. connect them as shown in the video!
      把Group Input接到 Instance上
  4. Align the instances using the 'Align Euler to Vector' node

  5. Pro Tip: By marking your node tree as asset and saving the file to your asset library you can then reuse that node tree in any other file!