Mercurial > hg-public > lasercut-scripts / file comparison
comparison: svg2gcode/svg/svg.py
svg2gcode/svg/svg.py
- changeset 3
- a519e3ac3849
- parent 2
- 660ce16822a9
- child 12
- a90b8113be25
equal
deleted
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replaced
| 2:660ce16822a9 | 3:a519e3ac3849 |
|---|---|
| 30 svg_ns = '{http://www.w3.org/2000/svg}' | 30 svg_ns = '{http://www.w3.org/2000/svg}' |
| 31 | 31 |
| 32 # Regex commonly used | 32 # Regex commonly used |
| 33 number_re = r'[-+]?(?:\d+(?:\.\d*)?|\.\d+)(?:[eE][-+]?\d+)?' | 33 number_re = r'[-+]?(?:\d+(?:\.\d*)?|\.\d+)(?:[eE][-+]?\d+)?' |
| 34 unit_re = r'em|ex|px|in|cm|mm|pt|pc|%' | 34 unit_re = r'em|ex|px|in|cm|mm|pt|pc|%' |
| 35 point_re = r'(?:\d+(?:\.\d*)?|\.\d+),(?:\d+(?:\.\d*)?|\.\d+)' | |
| 35 | 36 |
| 36 # Unit converter | 37 # Unit converter |
| 37 unit_convert = { | 38 unit_convert = { |
| 38 None: 1, # Default unit (same as pixel) | 39 None: 1, # Default unit (same as pixel) |
| 39 'px': 1, # px: pixel. Default SVG unit | 40 'px': 1, # px: pixel. Default SVG unit |
| 496 for seg in self.segments(precision): | 497 for seg in self.segments(precision): |
| 497 ret.append(simplify_segment(seg, precision)) | 498 ret.append(simplify_segment(seg, precision)) |
| 498 | 499 |
| 499 return ret | 500 return ret |
| 500 | 501 |
| 502 | |
| 503 class Polygon(Transformable): | |
| 504 '''SVG <polygon>''' | |
| 505 # class Path handles the <polygon> tag | |
| 506 tag = 'polygon' | |
| 507 | |
| 508 def __init__(self, elt=None): | |
| 509 Transformable.__init__(self, elt) | |
| 510 if elt is not None: | |
| 511 self.style = elt.get('style') | |
| 512 self.parse(elt.get('points')) | |
| 513 | |
| 514 def parse(self, pathstr): | |
| 515 """Parse path string and build elements list""" | |
| 516 | |
| 517 pathlst = re.findall(point_re, pathstr) | |
| 518 | |
| 519 #pathlst.reverse() | |
| 520 | |
| 521 current_pt = None | |
| 522 start_pt = None | |
| 523 while pathlst: | |
| 524 coord = pathlst.pop().split(",") | |
| 525 pt = Point(coord[0], coord[1]) | |
| 526 | |
| 527 if start_pt: | |
| 528 current_pt = pt | |
| 529 l = Segment(start_pt, current_pt) | |
| 530 self.items.append(l) | |
| 531 start_pt = current_pt | |
| 532 else: | |
| 533 start_pt = pt | |
| 534 self.items.append(MoveTo(pt)) | |
| 535 | |
| 536 def __str__(self): | |
| 537 return '\n'.join(str(x) for x in self.items) | |
| 538 | |
| 539 def __repr__(self): | |
| 540 return '<Polygon ' + self.id + '>' | |
| 541 | |
| 542 def segments(self, precision=0): | |
| 543 '''Return a list of segments, each segment is ended by a MoveTo. | |
| 544 A segment is a list of Points''' | |
| 545 ret = [] | |
| 546 # group items separated by MoveTo | |
| 547 for moveTo, group in itertools.groupby(self.items, | |
| 548 lambda x: isinstance(x, MoveTo)): | |
| 549 # Use only non MoveTo item | |
| 550 if not moveTo: | |
| 551 # Generate segments for each relevant item | |
| 552 seg = [x.segments(precision) for x in group] | |
| 553 # Merge all segments into one | |
| 554 ret.append(list(itertools.chain.from_iterable(seg))) | |
| 555 | |
| 556 return ret | |
| 557 | |
| 558 def simplify(self, precision): | |
| 559 '''Simplify segment with precision: | |
| 560 Remove any point which are ~aligned''' | |
| 561 ret = [] | |
| 562 for seg in self.segments(precision): | |
| 563 ret.append(simplify_segment(seg, precision)) | |
| 564 | |
| 565 return ret | |
| 566 | |
| 567 | |
| 501 class Ellipse(Transformable): | 568 class Ellipse(Transformable): |
| 502 '''SVG <ellipse>''' | 569 '''SVG <ellipse>''' |
| 503 # class Ellipse handles the <ellipse> tag | 570 # class Ellipse handles the <ellipse> tag |
| 504 tag = 'ellipse' | 571 tag = 'ellipse' |
| 505 | 572 |
