#!/usr/bin/env python # Copyright (c) 2017, Veronika Irvine # All rights reserved. # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions are met: # # 1. Redistributions of source code must retain the above copyright notice, this # list of conditions and the following disclaimer. # 2. Redistributions in binary form must reproduce the above copyright notice, # this list of conditions and the following disclaimer in the documentation # and/or other materials provided with the distribution. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND # ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE # DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR # ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES # (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND # ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. import sys import os from math import sin,cos,radians, ceil import inkex, simplestyle __author__ = 'Veronika Irvine' __credits__ = ['Ben Connors', 'Veronika Irvine', 'Mark Shafer'] __license__ = 'Simplified BSD' class LaceGround(inkex.Effect): """ Create a ground for lace from a text file descriptor using specified angle and spacing """ def unitToUu(self,param): """ Convert units. Converts a number in some units into the units used internally by Inkscape. param is a string representing a number with units attached. An example would be '3.8mm'. Any units supported by Inkscape are supported by this function. This wrapper function catches changes made to the location of the function between Inkscape versions. """ try: return self.unittouu(param) except: return inkex.unittouu(param) def getColorString(self, longColor, verbose=False): """ Convert the long into a #RRGGBB color value - verbose=true pops up value for us in defaults conversion back is A + B*256^1 + G*256^2 + R*256^3 """ longColor = long(longColor) if longColor <0: longColor = long(longColor) & 0xFFFFFFFF hexColor = hex(longColor)[2:-3] hexColor = '#' + hexColor.rjust(6, '0').upper() return hexColor def loadFile(self): # Ensure that file exists and has the proper extension if not self.options.file: inkex.errormsg('You must specify a template file.') exit() self.options.file = self.options.file.strip() if self.options.file == '': inkex.errormsg('You must specify a template file.') exit() if not os.path.isfile(self.options.file): inkex.errormsg('You have not specified a valid path for the template file.\n\nYour entry: '+self.options.file) exit() extension = os.path.splitext(self.options.file)[1] if extension != '.txt': inkex.errormsg('The file name must end with .txt.\n\nYour entry: '+self.options.file) exit() data = [] rowCount = 0 colCount = 0 with open(self.options.file,'r') as f: first = True for line in f: if first: # first line of file gives row count and column count first = False line = line.strip() temp = line.split('\t') type = temp[0] rowCount = int(temp[1]) colCount = int(temp[-1]) else: line = line.strip() line = line.lstrip('[') line = line.rstrip(']') rowData = line.split(']\t[') data.append([]) for cell in rowData: cell = cell.strip() data[-1].append([float(num) for num in cell.split(',')]) return {'type':type, 'rowCount':rowCount, 'colCount':colCount, 'data':data} def line(self, x1, y1, x2, y2): """ Draw a line from point at (x1, y1) to point at (x2, y2). Style of line is hard coded and specified by 's'. """ # define the motions path = 'M %s,%s L %s,%s' %(x1,y1,x2,y2) # define the stroke style s = {'stroke-linejoin': 'miter', 'stroke-width': self.options.linewidth, 'stroke-opacity': '1.0', 'fill-opacity': '1.0', 'stroke': self.options.linecolor, 'stroke-linecap': 'round', 'fill': 'none' } # create attributes from style and path attribs = {'style':simplestyle.formatStyle(s), 'd':path} # insert path object into current layer inkex.etree.SubElement(self.current_layer, inkex.addNS('path', 'svg'), attribs) def draw(self, data, rowCount, colCount): a = self.options.spacing theta = self.options.angle deltaX = a*sin(theta) deltaY = a*cos(theta) maxRows = ceil(self.options.height / deltaY) maxCols = ceil(self.options.width / deltaX) x = 0.0 y = 0.0 repeatY = 0 repeatX = 0 while repeatY * rowCount < maxRows: x = 0.0 repeatX = 0 while repeatX * colCount < maxCols: for row in data: for coords in row: x1 = x + coords[0]*deltaX y1 = y + coords[1]*deltaY x2 = x + coords[2]*deltaX y2 = y + coords[3]*deltaY x3 = x + coords[4]*deltaX y3 = y + coords[5]*deltaY self.line(x1,y1,x2,y2) self.line(x1,y1,x3,y3) repeatX += 1 x += deltaX * colCount repeatY += 1 y += deltaY * rowCount def __init__(self): """ Constructor. Defines the '--centerx' option of the script. """ # Call the base class constructor. inkex.Effect.__init__(self) # file self.OptionParser.add_option('-f', '--file', action='store', type='string', dest='file', help='File containing lace ground description') # Grid description self.OptionParser.add_option('--angle', action='store', type='float', dest='angle') self.OptionParser.add_option('--distance', action='store', type='float', dest='spacing') self.OptionParser.add_option('--pinunits', action='store', type='string', dest='pinunits') self.OptionParser.add_option('--width', action='store', type='float', dest='width') self.OptionParser.add_option('--patchwidthunits', action='store', type='string', dest='patchwidthunits') self.OptionParser.add_option('--height', action='store', type='float', dest='height') self.OptionParser.add_option('--patchheightunits', action='store', type='string', dest='patchheightunits') self.OptionParser.add_option('--linewidth', action='store', type='float', dest='linewidth') self.OptionParser.add_option('--lineunits', action='store', type='string', dest='lineunits') self.OptionParser.add_option('--linecolor', action='store', type='string', dest='linecolor') def effect(self): """ Effect behaviour. Overrides base class' method and draws something. """ result = self.loadFile() # Convert input to universal units self.options.width = self.unitToUu(str(self.options.width)+self.options.patchwidthunits) self.options.height = self.unitToUu(str(self.options.height)+self.options.patchheightunits) self.options.linewidth = self.unitToUu(str(self.options.linewidth)+self.options.lineunits) self.options.spacing = self.unitToUu(str(self.options.spacing)+self.options.pinunits) # Users expect spacing to be the vertical distance between footside pins # (vertical distance between every other row) but in the script we use it # as as diagonal distance between grid points # therefore convert spacing based on the angle chosen self.options.angle = radians(self.options.angle) self.options.spacing = self.options.spacing/(2.0*cos(self.options.angle)) # Convert color from long integer to hexidecimal string self.options.linecolor = self.getColorString(self.options.linecolor) # Draw a ground based on file description and user inputs # For now, assume style is Checker but could change in future self.draw(result['data'],result['rowCount'],result['colCount']) # Create effect instance and apply it. effect = LaceGround() effect.affect()