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mightyscape-0.92-deprecated/extensions/fablabchemnitz_lace_ground.py

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2019-11-14 20:05:10 +01:00
#!/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()