Export Houdini poly lines to SVG

Houdini SVG Export

# Python script to export Houdini poly lines to SVG
# Paste content to Python node
# Replace EXPORT_PATH_HERE with desired output file location

node = hou.pwd()
geo = node.geometry()

filename = "EXPORT_PATH_HERE"
padding = 50

box = geo.boundingBox()
minv = box.minvec()
size = box.sizevec()
 
width = size.x() * 1000
height = size.y() * 1000

width += padding
height += padding
  
def transform_points(points):
  for p in points:
    p = hou.Vector2(
      (p.x() - minv.x()) / size.x() * width,
      (1.0 - (p.y() - minv.y()) / size.y()) * height
    )
    yield p
  
with open(filename, 'w') as fp:
  fp.write('<?xml version="1.0" standalone="no"?>\n')
  fp.write('<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "http://www.w3.org/Graphics/SVG/1.1/DTD/svg11.dtd">\n')
  fp.write('<svg width="{width:.2f}" height="{height:.2f}" viewBox="{vbX:.2f} {vbY:.2f} {vbW:.2f} {vbH:.2f}" version="1.1" xmlns="http://www.w3.org/2000/svg">\n'.format(
    width = width,
    height = height,
    vbX = -padding,
    vbY = -padding,
    vbW = width + padding * 2,
    vbH = height + padding * 2,
  ))
  
  for prim in geo.iterPrims():
    if prim.type() != hou.primType.Polygon:
      continue
    points = [v.point().position() for v in prim.vertices()]
    points = list(transform_points(points))
    
    try:
       a color = prim.attribValue("Cd")
    except hou.OperationFailed: # Color attribute doest exist
        color = (0, 0, 0)
        
    try:
        stroke_width = prim.attribValue("swidth")
    except hou.OperationFailed: # Pscale attribute doest exist
        stroke_width = 1
    
    if not points:
      continue
    
    data = 'M{} {} '.format(round(points[0].x(), 3), round(points[0].y(), 3))
    for p in points[1:]:
      data += 'L{} {} '.format(round(p.x(), 3), round(p.y(), 3))

    # Close path for closed polys
    closed = prim.intrinsicValueDict()['closed']
    if closed:
      data += 'Z'
    
    fp.write('<path d="{}" stroke="rgb({}, {}, {})" stroke-width="{}px" fill="none"/>\n'.format(
      data,
      int(round(color[0] * 255)),
      int(round(color[1] * 255)),
      int(round(color[2] * 255)),
      stroke_width,
    ))
 
    
  fp.write('</svg>')