The right column is the edit box for the main branch, including：
Background:Background color of the scene
Show wireframe：Displaying the outline of the tree model but not including the bark, it is convenient to directly observe the ring sequence.
MainBranch: 3 types of main branches.
Branch：3 types of sub-branches.
Build：Rebuild a tree.
Undo: Undo
Redo: Redo
By clicking the option in the edit bar, you can select the main branch type and sub-branch type of the tree you want to construct. The main branch can only choose one type, and the sub-branches can be selected multiple. After selecting, click 'build' to generate randomly a tree.
The structure of each tree begins with the main branches, and then the sub-branches are randomly added at a certain height of the main branches, and then the leaves are randomly added within a certain height range of each branch. Then draw the whole tree onto the screen.
The hierarchy of trees is obtained randomly.