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Add example command to render graph as PNG #137

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6acefbe
Add console.log() to print out the dot format
conorgil Oct 24, 2017
0af09c1
Add example command for generating PNG of graph
conorgil Oct 24, 2017
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18 changes: 12 additions & 6 deletions docs/visualization.md
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Original file line number Diff line number Diff line change
Expand Up @@ -3,7 +3,9 @@
It can be very helpful to visualize your state machine as a directed graph. This is possible
with the open source [GraphViz](http://www.graphviz.org/) library if we convert from our
state machine configuration to the `.dot` language expected by GraphViz using the
`visualize` method:
`visualize` method.

A `main.js` file defining the following FSM:

```javascript
var visualize = require('javascript-state-machine/lib/visualize');
Expand All @@ -16,7 +18,7 @@ state machine configuration to the `.dot` language expected by GraphViz using th
]
});

visualize(fsm)
console.log(visualize(fsm));
```

Generates the following .dot syntax:
Expand All @@ -32,6 +34,10 @@ Generates the following .dot syntax:

Which GraphViz displays as:

```bash
node main.js | dot -Tpng -o graph.png && open graph.png
```

![door](../examples/vertical_door.png)

## Enhanced Visualization
Expand All @@ -47,7 +53,7 @@ You can customize the generated `.dot` output - and hence the graphviz visualiza
{ name: 'close', from: 'open', to: 'closed', dot: { color: 'red', headport: 's', tailport: 's' } }
]
});
visualize(fsm, { name: 'door', orientation: 'horizontal' });
console.log(visualize(fsm, { name: 'door', orientation: 'horizontal' }));
```

Generates the following (enhanced) `.dot` syntax:
Expand Down Expand Up @@ -81,7 +87,7 @@ You can use the same `visualize` method to generate `.dot` output for a state ma
]
});

visualize(Matter, { name: 'matter', orientation: 'horizontal' })
console.log(visualize(Matter, { name: 'matter', orientation: 'horizontal' }));
```

Generates the following .dot syntax:
Expand Down Expand Up @@ -116,7 +122,7 @@ Which GraphViz displays as:
]
});

visualize(Wizard, { orientation: 'horizontal' })
console.log(visualize(Wizard, { orientation: 'horizontal' }));
```

Generates:
Expand Down Expand Up @@ -167,7 +173,7 @@ Displays:
]
})

visualize(ATM)
console.log(visualize(ATM));
```

Generates:
Expand Down