diff -r 5411a25cfca7 -r 50d3086070df ldraw.py
--- a/ldraw.py	Sun Dec 10 15:45:50 2017 +0200
+++ b/ldraw.py	Sun Dec 10 15:46:47 2017 +0200
@@ -1,110 +1,5 @@
 #!/usr/bin/env python3
-import linetypes
-import re
-from geometry import *
-
-class BadLdrawLine(Exception):
-    pass
-
-def parse_ldraw_code(line):
-    line = line.strip()
-    if not line:
-        return linetypes.EmptyLine()
-    elif line == '0':
-        return linetypes.Comment('')
-    elif line.startswith('0 '):
-        return linetypes.Comment(line[2:].strip())
-    elif line.startswith('1 '):
-        return parse_ldraw_subfile_reference(line)
-    elif line.startswith('2 '):
-        return parse_ldraw_line(line)
-    elif line.startswith('3 '):
-        return parse_ldraw_triangle(line)
-    elif line.startswith('4 '):
-        return parse_ldraw_quadrilateral(line)
-    elif line.startswith('5 '):
-        return parse_ldraw_contour(line)
-    else:
-        raise BadLdrawLine('unknown line type')
-
-def parse_ldraw_subfile_reference(line):
-    pattern = r'^1\s+(\d+)' + r'\s+([^ ]+)' * (3 + 9 + 1) + r'\s*$'
-    match = re.search(pattern, line)
-    if not match:
-        raise BadLdrawLine('unable to parse')
-    groups = list(match.groups())
-    indices = {
-        'color': 0,
-        'anchor': slice(1, 4),
-        'matrix': slice(4, 13),
-        'subfile_path': 13
-    }
-    try:
-        color = int(groups[indices['color']])
-        vertex_values = [float(x) for x in groups[indices['anchor']]]
-        matrix_values = [float(x) for x in groups[indices['matrix']]]
-    except ValueError:
-        raise BadLdrawLine('bad numeric values')
-    return linetypes.SubfileReference(
-        color = color,
-        anchor = Vertex(*vertex_values),
-        matrix = TransformationMatrix(matrix_values),
-        subfile_path = groups[indices['subfile_path']]
-    )
-
-def generic_parse_polygon(line, *, type_code, vertex_count):
-    pattern = r'^' \
-        + str(type_code) \
-        + '\s+(\d+)' \
-        + r'\s+([^ ]+)' * (vertex_count * 3) \
-        + r'\s*$'
-    match = re.search(pattern, line)
-    if not match:
-        raise BadLdrawLine(str.format('cannot parse type-{} line', type_code))
-    vertices = []
-    for vertex_index in range(vertex_count):
-        slice_begin = 1 + vertex_index * 3
-        slice_end = 1 + (vertex_index + 1) * 3
-        coordinates = match.groups()[slice_begin:slice_end]
-        assert(len(coordinates) == 3)
-        try:
-            coordinates = [float(x) for x in coordinates]
-        except ValueError:
-            raise BadLdrawLine('bad numeric values')
-        vertices.append(Vertex(*coordinates))
-    return {
-        'color': int(match.group(1)),
-        'vertices': vertices,
-    }
-
-def parse_ldraw_line(line):
-    parse_result = generic_parse_polygon(line, type_code = 2, vertex_count = 2)
-    return linetypes.LineSegment(
-        color = parse_result['color'],
-        geometry = LineSegment(*parse_result['vertices']),
-    )
-
-def parse_ldraw_triangle(line):
-    parse_result = generic_parse_polygon(line, type_code = 3, vertex_count = 3)
-    return linetypes.Triangle(
-        color = parse_result['color'],
-        geometry = Polygon(parse_result['vertices']),
-    )
-
-def parse_ldraw_quadrilateral(line):
-    parse_result = generic_parse_polygon(line, type_code = 4, vertex_count = 4)
-    return linetypes.Quadrilateral(
-        color = parse_result['color'],
-        geometry = Polygon(parse_result['vertices']),
-    )
-
-def parse_ldraw_contour(line):
-    parse_result = generic_parse_polygon(line, type_code = 5, vertex_count = 4)
-    return linetypes.Contour(
-        color = parse_result['color'],
-        geometry = LineSegment(*parse_result['vertices'][0:2]),
-        control_points = parse_result['vertices'][2:],
-    )
+from parse import parse_ldraw_code
 
 def read_ldraw(file, *, libraries):
     result = list()