Myujth

I'm trying to render a d3 tree graph such that it the dataset expands out from both sides of the central node. I've been looking at examples like this and want to keep the drag and drop functionality. The closest example that I can find is:

Tree with children towards multiple side in d3.js (similar to family tree)

So far I have attempted to try and toggle the d.y value to negative by subtracting it from the viewerWidth variable in the update(source) function. This just reverses the direction of the d3 tree chart from right to left only.

function update(source) 
 //Other code

 // Set widths between levels based on maxLabelLength.
 nodes.forEach(function(d) 
 d.y = viewerWidth - (d.depth * (maxLabelLength * 10)); //maxLabelLength * 10px
 // alternatively to keep a fixed scale one can set a fixed depth per level
 // Normalize for fixed-depth by commenting out below line
 // d.y = (d.depth * 500); //500px per level.
 );

 //Other code

If I apply this to certain entries in the nodes array, then the tree does divide but the x value spacing is out:

function update(source) 

 //Other code

 // Set widths between levels based on maxLabelLength.
 nodes.forEach(function(d,i) 

 if(i < nodes.length / 2) 
 d.y = viewerWidth - (d.depth * (maxLabelLength * 10)); //maxLabelLength * 10px
 else 
 d.y = (d.depth * (maxLabelLength * 10)); 
 
 // alternatively to keep a fixed scale one can set a fixed depth per level
 // Normalize for fixed-depth by commenting out below line
 // d.y = (d.depth * 500); //500px per level.
 );

 //Other code

Another solution is to render the tree in one direction, and then try manipulating the positions of the nodes afterwards, but this isn't ideal.

How can I create a bidirectional node tree using the one dataset?