Custom sibling angle for child nodes

Question

As I explored the TikZ manual and available examples; the position of child nodes are defined within the parent node. This means that all child nodes spread on the same radius from the parent with constant angle intervals.

How to define the level dsiatance and sibling angle individually for each child node?

\node[ball color=red,circle] (parent) at (5,5) {Parent}
    [level distance=4cm,sibling angle=30,clockwise from=0]
    child {node[rectangle,fill=red,color=white]
    {e.g. 2cm from parent at angle 0}}
    child {node[rectangle,fill=red,color=white]
    {e.g. 5cm from parent at angle 20}}
    child {node[rectangle,fill=red,color=white]
    {e.g. 3cm from parent at angle 60}};

Instead of constant distance from parent and equal angle between child nodes defined in

[level distance=4cm,sibling angle=30,clockwise from=0]

How to define a custom (independent) value for each child?

Answer 1

You can pass the level distance and sibling angle options to the child keywords:

\documentclass{article}
\usepackage{tikz}
\usetikzlibrary{trees}

\begin{document}
\begin{tikzpicture}
\node[ball color=red,circle] (parent) at (5,5) {Parent}
    [clockwise from=0]
    child [level distance=2cm] {node[rectangle,fill=red]
    {A}}
    child [level distance=4cm, sibling angle=20] {node[rectangle,fill=red]
    {B}}
    child [level distance=3cm, sibling angle=30] {node[rectangle,fill=red]
    {C}};
\end{tikzpicture}
\end{document}