MadButterfly: tools/svg2code.py comparison

comparison tools/svg2code.py @ 273:0cadeb9fdfc3

Merged

author	wycc
date	Mon, 26 Jan 2009 01:37:04 +0800
parents	c96f38ad4bb6
children	c8b6ca46950b

comparison

equal deleted inserted replaced

-:01439f28d0bd
+:0cadeb9fdfc3
 translate_transform(shape_coord_id, transform, codefo, 'SHAPE_')
 coord_id = shape_coord_id
 pass
 return coord_id
+## \brief Calculate geometry of ellipse where the arc is on.
+#
+# This function calculate the ellipse with information from SVG path data.
+#
+# \see calc_center_and_x_aix()
+def _calc_ellipse_of_arc(x0, y0, rx, ry, x_rotate, large, sweep, x, y):
+import math
+_sin = math.sin(x_rotate)
+_cos = math.cos(x_rotate)
+nrx = x * _cos + y * _sin
+nry = x * -_sin + y * _cos
+nrx0 = x0 * _cos + y0 * _sin
+nry0 = x0 * -_sin + y0 * _cos
+udx = (nrx - nrx0) / 2 / rx # ux - umx
+udy = (nry - nry0) / 2 / ry # uy - umy
+umx = (nrx + nrx0) / 2 / rx
+umy = (nry + nry0) / 2 / ry
+udx2 = udx * udx
+udy2 = udy * udy
+udl2 = udx2 + udy2
+if udy != 0:
+	# center is at left-side of arc
+	udcx = -math.sqrt((1 - udl2) * udl2) / (udy + udx2 / udy)
+	udcy = -udcx * udx / udy
+else:
+	# center is at down-side of arc
+	udcx = 0
+	udcy = math.sqrt((1 - udl2) * udl2) / udx
+pass
+reflect = 0
+if large:
+	reflect ^= 1
+pass
+if sweep != 1:
+	reflect ^= 1
+pass
+if reflect:
+	udcx = -udcx
+	udcy = -udcy
+pass
+nrcx = rx * (udcx + umx)
+nrcy = ry * (udcy + umy)
+cx = nrcx * _cos - nrcy * _sin
+cy = nrcx * _sin + nrcy * _cos
+xx = rx * _cos + cx
+xy = rx * _sin + cy
+return cx, cy, xx, xy
 # M x y             : Move to (x,y)
 # Z                 : close path
 # L x y             : lineto (x,y)
 # H x               : horizontal line to x
 # V y               : Vertical line to y
 'H': 1, 'h':1,
 'V': 1, 'v':1,
 'C': 6, 'c':6,
 'S': 4, 's':4,
 'Q': 4, 'q':4,
-'T': 2, 't':2}
+'T': 2, 't':2,
+'A': 7, 'a':7}
 def translate_path_data(data,codefo):
 temp = data.split()
 fields=[]
 for f in temp:
 for s in f.split(','):
 if s != '':
 fields.append(s)
 cmd = ''
+cmd_args = 0
 commands=''
 args=[]
+narg = 0
 fix_args=[]
 for f in fields:
-if cmd == 'A' or cmd == 'a':
+if f in command_length:
-try:
+if cmd_args != 0 and (narg % cmd_args) != 0:
-d = int(f)
+raise ValueError, 'invalid path data %s' % (repr(fields))
-fix_args.append(d)
+cmd = f
-if (narg % 7) == 0:
+cmd_args = command_length[f]
-commands = commands + cmd
+narg = 0
-narg = narg + 1
+continue
-except:
-	        pass
+if (narg % cmd_args) == 0:
-else:
+commands = commands + cmd
-try:
+pass
-	        d = float(f)
+arg = float(f)
-	args.append(d)
+args.append(arg)
-	if (narg % command_length[cmd]) == 0:
+narg = narg + 1
-commands = commands + cmd
-	narg = narg + 1
+if (narg % cmd_args) == 0 and (cmd in 'Aa'):
-	continue
+x0, y0, rx, ry, x_rotate, large, sweep, x, y = \
-except:
+tuple(args[-9:])
-pass
+x_rotate = int(x_rotate)
-cmd = f
+large = int(large)
-narg=0
+sweep = int(sweep)
-pass
+cx, cy, xx, xy = _calc_ellipse_of_arc(x0, y0, rx, ry,
-return [commands,args,fix_args]
+x_rotate, large,
+sweep, x, y)
+args[-7:] = [cx, cy, xx, xy, x, y]
+fix_args.append(sweep)
+pass
+pass
+return commands, args, fix_args
 _id_sn = 0
 def _get_id(obj):
 global _id_sn
 def translate_path(path, coord_id, codefo, doc):
 coord_id = translate_shape_transform(path, coord_id, codefo)
 path_id = path.getAttribute('id')
 d = path.getAttribute('d')
-(commands,args,fix_args) = translate_path_data(d,codefo)
+commands, args, fix_args = translate_path_data(d,codefo)
 print >> codefo, 'dnl'
 #print >> codefo, 'ADD_PATH([%s], [%s], [%s])dnl' % (path_id, d, coord_id)
 sarg=''
 for c in args:
 sarg = sarg + "%f," % c
 pass
 def svg_2_code(dom, codefo):
 for node in dom.childNodes:
 if node.localName == 'svg' and node.namespaceURI == svgns:
-break;
+break
 pass
 else:
 raise ValueErr, 'no any svg tag node.'
 svg = node

Mercurial > MadButterfly

comparison tools/svg2code.py @ 273:0cadeb9fdfc3