An experimental FreeCAD macro that will export visible objects as X3D

export_x3d.py

#
# This is an experimental FreeCAD macro that will export current scene
# as X3D file. Only the visible objects that can be converted to mesh
# will be exported with their color.
#

import FreeCAD
import FreeCADGui
import xml.etree.ElementTree as et
from PySide.QtGui import QFileDialog
import os

def getShapeNode(vertices, faces, diffuseColor=None):
    """Returns a <Shape> node for given mesh data.
    vertices: list of vertice coordinates as `Vector` type
    faces: list of tuple of vertice indexes ex: (1, 2, 3)
    diffuseColor: tuple in the form of (R, G, B)"""

    shapeNode = et.Element('Shape')
    faceNode = et.SubElement(shapeNode, 'IndexedFaceSet')
    faceNode.set('coordIndex', ' '.join(["%d %d %d -1" % face for face in faces]))
    coordinateNode = et.SubElement(faceNode, 'Coordinate')
    coordinateNode.set('point',
        ' '.join(["%f %f %f" % (p.x, p.y, p.z) for p in vertices]))

    if diffuseColor:
        appearanceNode = et.SubElement(shapeNode, 'Appearance')
        materialNode = et.SubElement(appearanceNode, 'Material')
        materialNode.set('diffuseColor', "%f %f %f" % diffuseColor)

    return shapeNode

def exportX3D(objects, filepath):
    """Export given list of objects to a X3D file.

    Each object is a dictionary in this form:
    {
        points : [Vector, Vector...],
        faces : [(pi, pi, pi), ...],    # pi: point index
        color : (R, G, B)               # number range is 0-1.0
    }"""

    fileNode = et.Element('X3D')
    fileNode.set('profile', 'Interchange')
    fileNode.set('version', '3.3')
    sceneNode = et.SubElement(fileNode, 'Scene')

    for o in objects:
        shapeNode = getShapeNode(o["points"], o["faces"], o["color"])
        sceneNode.append(shapeNode)

    with open(filepath, "wr") as f:
        f.write(et.tostring(fileNode))

def getDocumentDir(doc):
    """Returns directory for given document. `None` if the file is not
    saved yet."""
    if doc.FileName:
        return os.path.dirname(doc.FileName)
    else:
        return None

def run():
    doc = FreeCAD.activeDocument()

    objects = []

    for o in doc.Objects:
        if o.ViewObject.Visibility:
            if hasattr(o, "Shape"):
                mesh = o.Shape.tessellate(1)

                if (not mesh[0]) or (not mesh[1]):
                    continue  # some objects (such as Part:Circle)
                              # generate empty mesh, skip them

                objects.append({
                    "points": mesh[0],
                    "faces": mesh[1],
                    "color": o.ViewObject.ShapeColor[0:3]
                })

    if objects:
        savefile = QFileDialog.getSaveFileName(
            parent = FreeCADGui.getMainWindow(),
            caption = "Export X3D file",
            dir = getDocumentDir(doc))[0]
        exportX3D(objects, savefile)
    else:
        raise Exception("There is nothing to export!")

if __name__ == "__main__":
    run()

@jmwright no problem at all. About the notifications, github doesn't send notifications on gist comments :/