Question

dot diagram neon

Answer 1

Do you mean a Graphviz DOT file rendered with a neon look (bright colors + glow), or something else (an image you want me to draw, a Mermaid diagram, an SVG template, or CSS for a web page)? I can produce a DOT file, an SVG with neon glow, or both. Which do you want?

If you want a ready-to-render Graphviz DOT + instructions to get a neon effect, here’s a quick option you can try now.

1) DOT file (neon colors and thick strokes)
Save this as neon_graph.dot:

digraph G {
graph [bgcolor="#071025", rankdir=LR];
node [
shape=ellipse,
style=filled,
fillcolor="#071a2b",
color="#00ffd0",
fontcolor="#bfffe8",
fontsize=14,
fontname="Helvetica",
penwidth=3
];
edge [color="#00ffd0", penwidth=3];

Start [label="Start"];
Process [label="Process"];
Decision [label="Decision", shape=diamond];
End [label="End"];

Start -> Process -> Decision;
Decision -> Process [label="no"];
Decision -> End [label="yes"];
}

2) Render to SVG (so we can add glow)
Run:
dot -Tsvg neon_graph.dot -o neon_graph.svg

3) Add an SVG glow filter
Open neon_graph.svg and inside the <svg> tag (near top) add a <defs> block with a glow filter, then apply it to elements (nodes/edges). Example filter to paste into the SVG:

<defs>
<filter id="neonGlow" x="-50%" y="-50%" width="200%" height="200%">
<feGaussianBlur stdDeviation="3" result="coloredBlur"/>
<feMerge>
<feMergeNode in="coloredBlur"/>
<feMergeNode in="SourceGraphic"/>
</feMerge>
</filter>
<style type="text/css"><![CDATA[
.node > ellipse, .node > polygon, .edge path { filter: url(#neonGlow); }
/* optionally intensify glow for labels */
.node text { fill:#eafff8; paint-order:stroke; stroke:#071025; stroke-width:1px; }
]]></style>
</defs>

If the Graphviz SVG groups differ (Graphviz sometimes uses <g class="node">, <g class="edge">), the CSS selectors above should match. If not, inspect the generated SVG and apply the filter to the appropriate shapes (e.g., <ellipse>, <polygon>, <path>).

Notes and tweaks
- Change colors (e.g., #00ffd0, #00f, #ff44ff) to your preferred neon palette.
- Increase stdDeviation to enlarge glow, increase penwidth for stronger strokes.
- For a web page, you can embed the SVG and add external CSS rules instead of modifying the SVG file.
- If you want I can produce a finished SVG (with the filter already applied) or a PNG export, or adapt this to Mermaid or D3 — tell me the output format and any labels/content.

Which output would you like me to produce for you now?