Houdini NodeShape Converter

A small Node.py + Flask application that provides a simple REST-Api to convert SVG files to Houdini NodeShape JSON files. To allow using the Api from JavaScript in the browser, it allows cross-origin requests by default.

• This form can be found at https://www.niklasrosenstein.com/post/2017-06-13-houdini-nodeshape-converter/
• An instance of this Api is deployed on Heroku under https://houdini-nodeshape-converter.herokuapp.com/
• You can find the Heroku deployment in the heroku branch

REST-Api

GET /

Parameters

• ?shape_id=: The ID of the shape to download the JSON file for. The shape ID is returned after converting an SVG file with the POST / API.

POST /

Parameters

• name: The name of the created shape. This name will be contained in the resulting JSON object. If not specified, the file's name is used.
• xres: X resolution of the SVG image. If omitted, will be determined from the bounding box of all paths that are converted into the Houdini NodeShape.
• yres: See xres
• file: An SVG image file that must contain all elements necessary to generate a Houdini NodeShape.

Returns

• status: "ok"
• name: The name that was specified via the name parameter. If the parameter was omitted, the name of the uploaded file will be here.
• id: The ID of the shape. Use the GET / API to download the JSON file.

Command-line Tool

$ nodepy-pm install git+https://github.com/NiklasRosenstein/houdini-nodeshape-converter.git --global
$ houdini-nodeshape-converter --help
Usage: houdini-nodeshape-converter [OPTIONS] SVGFILE [INPUTDIM]

  Houdini Nodeshape Converter -- Convert SVG paths to Houdini JSON
  nodeshapes.

  With SVGFILE you must specify an SVG file that contains the following
  elements from which a Houdini Nodeshape can be generated:

  * <path id="outline"/>
  * <path id="outputs"/>
  * <path id="inputs"/>
  * <path id="flag0"/>
  * <path id="flag1"/>
  * <path id="flag2"/>
  * <path id="flag3"/>
  * <rect id="icon"/>

  The INPUTDIM must be of the format `WxH` where W and H specify the width
  and height of the input SVG file. If the parameter is omitted, the
  bounding box of all paths in the SVG file is used instead to normalize the
  shape size to 0..1 range.

  Outputs the JSON Nodeshape to stdout.

Options:
  -n, --name TEXT              Name of the shape in the JSON file. Default:
                              SVGFILE basename
  -s, --cubic-samples INTEGER  Number of samples for cubic curves. Default: 10
  --help                       Show this message and exit.

Flask Blueprint

To embedd the REST-Api into your existing Flask application:

import flask
import {make_api} from '@NiklasRosenstein/houdini-nodeshape-converter'

app = flask.Flask(__name__)
make_api(app, url_prefix='/houdini-nodeshape-converter/')