Rhino to HPGL

rhino_to_hpgl.py

'''This script creates an HPGL file from curves in a Rhino file.
Place all curves in the model world as they would sit in relation to the origin on the plotter.
File will export to same location as script.'''

import rhinoscriptsyntax as rs
from datetime import datetime
import os.path


filename = rs.GetString("What would you like to name the file?  (Use \"#\" for ISO 8601)  ", defaultString="output#")
if "#" in filename:
	filename = filename[:-1]
	ISO_8601 =  datetime.now().strftime('%Y%m%dT%H%M%S')
	filename =  os.path.abspath('/Users/johnmars/Desktop/' + filename + ISO_8601 + '.hpgl')
	hpglOut = file(filename, 'w')
else:
	filename = os.path.abspath('/Users/johnmars/Desktop/' + filename + '.hpgl')
	hpglOut = file(filename, 'w')

pen = 1
plotter_step = .025 #mm
plotter_step /= 25.4 #convert to in

# Changes the model units to inches, but does not scale model.
rs.UnitSystem(unit_system=8, scale=False)

# Initialize Plotter
hpglOut.write('IN;\n')
hpglOut.write('SP' + str(pen) + ';\n')


allCurves = rs.ObjectsByType(4)
for curve in allCurves:
	if (rs.CurveDegree(curve) == 2 or rs.CurveDegree(curve) == 3) and rs.IsPolyCurve(curve):
		rs.ExplodeCurves(curve, True)
allCurves = rs.ObjectsByType(4)

for curve in allCurves:
	
	if rs.CurveDegree(curve) == 1: #polyline or line
		points = rs.CurveEditPoints(curve)
		print "1", points

	elif rs.CurveDegree(curve) >= 2: #polycurve or curve
		points = rs.DivideCurveLength(curve, .01)
		print "2", points

	if not points:
		continue
		
	# PU to the first point
	x = points[0][0]
	y = points[0][1]
	hpglOut.write('PU' + str(int(x * (1 / plotter_step))) + ',' + str(int(y * (1 / plotter_step))) + ';\n')
	
	# PD to every subsequent point
	i = 1
	while i < len(points):
		x = points[i][0]
		y = points[i][1]
		hpglOut.write('PD' + str(int(x * (1 / plotter_step))) + ',' + str(int(y * (1 / plotter_step))) + ';\n')
		i += 1

hpglOut.write('SP0;\n')
hpglOut.close()

print "Done! File exported as" + filename