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GNU GENERAL PUBLIC LICENSE
Version 2, June 1991
Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
Everyone is permitted to copy and distribute verbatim copies
of this license document, but changing it is not allowed.
Preamble
The licenses for most software are designed to take away your
freedom to share and change it. By contrast, the GNU General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users. This
General Public License applies to most of the Free Software
Foundation's software and to any other program whose authors commit to
using it. (Some other Free Software Foundation software is covered by
the GNU Lesser General Public License instead.) You can apply it to
your programs, too.
When we speak of free software, we are referring to freedom, not
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To protect your rights, we need to make restrictions that forbid
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you have. You must make sure that they, too, receive or can get the
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We protect your rights with two steps: (1) copyright the software, and
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The precise terms and conditions for copying, distribution and
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GNU GENERAL PUBLIC LICENSE
TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
0. This License applies to any program or other work which contains
a notice placed by the copyright holder saying it may be distributed
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the term "modification".) Each licensee is addressed as "you".
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Whether that is true depends on what the Program does.
1. You may copy and distribute verbatim copies of the Program's
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and give any other recipients of the Program a copy of this License
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You may charge a fee for the physical act of transferring a copy, and
you may at your option offer warranty protection in exchange for a fee.
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the Program is not required to print an announcement.)
These requirements apply to the modified work as a whole. If
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In addition, mere aggregation of another work not based on the Program
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This section is intended to make thoroughly clear what is believed to
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original copyright holder who places the Program under this License
may add an explicit geographical distribution limitation excluding
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NO WARRANTY
11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
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REPAIR OR CORRECTION.
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WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
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TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
convey the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
Also add information on how to contact you by electronic and paper mail.
If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:
Gnomovision version 69, Copyright (C) year name of author
Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, the commands you use may
be called something other than `show w' and `show c'; they could even be
mouse-clicks or menu items--whatever suits your program.
You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary. Here is a sample; alter the names:
Yoyodyne, Inc., hereby disclaims all copyright interest in the program
`Gnomovision' (which makes passes at compilers) written by James Hacker.
<signature of Ty Coon>, 1 April 1989
Ty Coon, President of Vice
This General Public License does not permit incorporating your program into
proprietary programs. If your program is a subroutine library, you may
consider it more useful to permit linking proprietary applications with the
library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License.
README.txt 0 → 100644
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THLaser Inkscape Plugin
-----------------------
This program is an Inkscape extension for exporting a set of paths as
gcode script. It is primarily used by members to the think|haus hacker
space (thinkhaus.org) for use with their laser cutter. As such it is
customized to suit our needs and so may not be your best choice if you
are looking for a general purpose Inkscape to gcode script.
This script is a fork of Gcodetools v1.2 written by Nick Drobchenko and
is released under the same license (GPL v2).
Installation
------------
Copy the files thlaser.py and thlaser.inx into your Inkscape extensions
folder. Fire up inkscape and you will find the plugin under Extensions ->
Export -> THLaser GCode Export.
Keyboard Shortcut
-----------------
You may find it handy to assign the extension to a keyboard shortcut.
Include something like the following line to your inkscape keys
preferences file (this will bind the plugin to Ctrl+\):
<bind key="backslash" modifiers="Ctrl" action="org.thinkhaus.filter.thlaser" display="true"/>
You can find your keyboard preferences file:
* On Linux: ~/.config/inkscape/keys/default.xml
* Windows: %UserProfile%\Application Data\Inkscape\keys\default.xml
If that file doesn't exist, create it and include the following:
<?xml version="1.0"?>
<keys name="My Keys">
<bind key="backslash" modifiers="Ctrl" action="org.thinkhaus.filter.thlaser" display="true"/>
</keys>
thlaser.inx 0 → 100644
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<?xml version="1.0" encoding="UTF-8"?>
<inkscape-extension>
<name>THLaser GCode Exporter</name>
<id>org.thinkhaus.filter.thlaser</id>
<effect>
<object-type>path</object-type>
<effects-menu>
<submenu _name="Export"/>
</effects-menu>
</effect>
<dependency type="executable" location="extensions">thlaser.py</dependency>
<dependency type="executable" location="extensions">inkex.py</dependency>
<script>
<command reldir="extensions" interpreter="python">thlaser.py</command>
</script>
<param name='tab' type="notebook">
<page name='tab' _gui-text='Help'>
<_param name="fullhelp" type="description">THLaser converts inkscape paths to Gcode. (v1.30)
This script is a fork of Gcodetools v1.2 by Nick Drobchenko. It is currently maintained by Peter Rogers (peter.rogers@gmail.com) at think|haus.</_param>
</page>
<page name='tab' _gui-text='Advanced'>
<param name="biarc-tolerance" type='float' _gui-text='Biarc interpolation tolerance'>1</param>
<_param name="help" type="description">Biarc interpolation tolerance is the maximum allowed distance between a path and it's approximation. If this value is exceeded, the path will be split into two segments.</_param>
<param name="biarc-max-split-depth" type="int" _gui-text="Maximum splitting depth">4</param>
<param name="min-arc-radius" type="float" precision="5" min="-1000" max="1000" _gui-text="Minimum arc radius">0.05</param>
<param name="Xoffset" type="float" precision="4" min="-1000" max="1000" _gui-text="Offset along X axis">0.0</param>
<param name="Yoffset" type="float" precision="4" min="-1000" max="1000" _gui-text="Offset along Y axis">0.0</param>
<param name="logging" type="boolean" _gui-text="Log debug output from plugin:">true</param>
</page>
<page name='tab' _gui-text='Preferences'>
<param name="filename" type="string" _gui-text="File name: ">output.ngc</param>
<param name="directory" type="string" _gui-text="Directory: "></param>
<_param name="help" type="description">(blank is your desktop)</_param>
<param name="feed" type="float" precision="4" min="0" max="1000" _gui-text="Feed rate (unit/min):">4.0</param>
<param name="Xscale" type="float" precision="4" min="-1000" max="1000" _gui-text="Scale along X axis:">1</param>
<param name="Yscale" type="float" precision="4" min="-1000" max="1000" _gui-text="Scale along Y axis:">1</param>
<param name="double_sided_cutting" type="boolean" _gui-text="Double-sided cutting:">false</param>
<param name="draw-curves" type="boolean" _gui-text="Draw curves:">true</param>
<param name="unit" type="enum" _gui-text="Units: ">
<item value="mm">mm</item>
<item value="in">in</item>
</param>
</page>
</param>
</inkscape-extension>
thlaser.py 0 → 100644
View file @ 6aac7982
#!/usr/bin/env python
"""
think|haus gcode inkscape extension
-----------------------------------
Maintained by Peter Rogers (peter.rogers@gmail.com)
Customized to suit our needs at thinkhaus.org (see change log below)
Based on a script by Nick Drobchenko from the CNC club
***
Copyright (C) 2009 Nick Drobchenko, nick@cnc-club.ru
based on gcode.py (C) 2007 hugomatic...
based on addnodes.py (C) 2005,2007 Aaron Spike, aaron@ekips.org
based on dots.py (C) 2005 Aaron Spike, aaron@ekips.org
based on interp.py (C) 2005 Aaron Spike, aaron@ekips.org
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
"""
Changelog 2012-01-12 - PAR:
* fixed bug in compile_paths when dealing with empty node data
Changelog 2011-10-16 - PAR:
* general code cleanup to make things more readable
* now inkscape coordinate system matches laser bed coordinate system
* removed "area curve" code, since it wasn't being used and wasn't working anyways
* cleanup of source code, reorganized the dialog window
Changelog 2011-08-06 - PAR:
* layer and group transforms now taken into account
* tool change now happens on every layer (only when multiple layers present)
* displays a message at the start of each layer
Changelog 2011-07-31 - PAR:
* misc bug fixes
* objects in document root (ie not in a layer) now outputted properly
* skips 'comment' layers (ie name prefixed with '#')
* warns about any selected objects not outputted by the script
Changelog 2011-07-01 - PAR:
* logging is now enabled by default
* handling groups and layers properly
* toolchange operation (M6) added between outputting layers
* removed 'options.ids' in favor of 'self.selected'
Changelog 2011-02-20 - Adina:
* removed any movement in the z axis when the laser is trying to etch a curve.
* removed extra M3s: the laser only turns on at the beginning of a cut block, not before every line.
Changelog 2010-04-07 - Adina:
* separate scaling factor for x and y,
* x and y scaled to mm or inches that match the dimensions in inkscape (not 1px = 1 in or mm)
Changelog 2010-04-20:
* made the .inx file refer to the correct .py file... it should work now?
"""
###
### Gcode tools
###
import inkex, simplestyle, simplepath
import cubicsuperpath, simpletransform, bezmisc
import os
import math
import bezmisc
import re
import copy
import sys
import time
_ = inkex._
################################################################################
###
### Constants
###
################################################################################
VERSION = "1.30"
STRAIGHT_TOLERANCE = 0.0001
STRAIGHT_DISTANCE_TOLERANCE = 0.0001
LASER_ON = "M3 (LASER ON)\n" # Peter - LASER ON MCODE
LASER_OFF = "M5 (LASER OFF)\n" # Peter - LASER OFF MCODE
TOOL_CHANGE = "T%02d (select tool)\nM6 (tool change)\n\n"
HEADER_TEXT = '%%\n(Generated by thlaser v%s inkscape plugin)\n(based on code from gcode_tools)\n\nG96 S90 (set spindle speed so M3/M5 will work)\n' % VERSION
FOOTER_TEXT = "%s\nM2 (end)\n%%" % LASER_OFF
BIARC_STYLE = {
'biarc0': simplestyle.formatStyle({ 'stroke': '#88f', 'fill': 'none', 'stroke-width':'1' }),
'biarc1': simplestyle.formatStyle({ 'stroke': '#8f8', 'fill': 'none', 'stroke-width':'1' }),
'line': simplestyle.formatStyle({ 'stroke': '#f88', 'fill': 'none', 'stroke-width':'1' }),
'area': simplestyle.formatStyle({ 'stroke': '#777', 'fill': 'none', 'stroke-width':'0.1' }),
}
# Inkscape group tag
SVG_GROUP_TAG = inkex.addNS("g", "svg")
SVG_PATH_TAG = inkex.addNS('path','svg')
SVG_LABEL_TAG = inkex.addNS("label", "inkscape")
GCODE_EXTENSION = ".ngc"
options = {}
################################################################################
###
### Common functions
###
################################################################################
###
### Just simple output function for better debugging
###
class Logger(object):
first = True
enabled = True
def __init__(self):
home = os.getenv("HOME") or os.getenv("USERPROFILE")
self.logpath = os.path.join(home, "thlaser.log")
def write(self, s):
if (not self.enabled):
return
if self.first and os.path.isfile(self.logpath):
os.remove(self.logpath)
self.first = False
f = open(self.logpath, "a")
f.write(str(s)+"\n")
f.close()
# The global logger object
logger = Logger()
###
### Point (x,y) operations
###
## Pretty much what it sounds like: defines some arithmetic functions that can be applied to points.
class P:
def __init__(self, x, y=None):
if not y==None:
self.x, self.y = float(x), float(y)
else:
self.x, self.y = float(x[0]), float(x[1])
def __add__(self, other): return P(self.x + other.x, self.y + other.y)
def __sub__(self, other): return P(self.x - other.x, self.y - other.y)
def __neg__(self): return P(-self.x, -self.y)
def __mul__(self, other):
if isinstance(other, P):
return self.x * other.x + self.y * other.y
return P(self.x * other, self.y * other)
__rmul__ = __mul__
def __div__(self, other): return P(self.x / other, self.y / other)
def mag(self): return math.hypot(self.x, self.y)
def unit(self):
h = self.mag()
if h: return self / h
else: return P(0,0)
def dot(self, other): return self.x * other.x + self.y * other.y
def rot(self, theta):
c = math.cos(theta)
s = math.sin(theta)
return P(self.x * c - self.y * s, self.x * s + self.y * c)
def angle(self): return math.atan2(self.y, self.x)
def __repr__(self): return '%f,%f' % (self.x, self.y)
def pr(self): return "%.2f,%.2f" % (self.x, self.y)
def to_list(self): return [self.x, self.y]
###
### Functions to operate with CubicSuperPath
###
def csp_at_t(sp1,sp2,t):
bez = (sp1[1][:],sp1[2][:],sp2[0][:],sp2[1][:])
return bezmisc.bezierpointatt(bez,t)
def cspbezsplit(sp1, sp2, t = 0.5):
s1,s2 = bezmisc.beziersplitatt((sp1[1],sp1[2],sp2[0],sp2[1]),t)
return [ [sp1[0][:], sp1[1][:], list(s1[1])], [list(s1[2]), list(s1[3]), list(s2[1])], [list(s2[2]), sp2[1][:], sp2[2][:]] ]
def cspbezsplitatlength(sp1, sp2, l = 0.5, tolerance = 0.01):
bez = (sp1[1][:],sp1[2][:],sp2[0][:],sp2[1][:])
t = bezmisc.beziertatlength(bez, l, tolerance)
return cspbezsplit(sp1, sp2, t)
def cspseglength(sp1,sp2, tolerance = 0.001):
bez = (sp1[1][:],sp1[2][:],sp2[0][:],sp2[1][:])
return bezmisc.bezierlength(bez, tolerance)
def csplength(csp):
total = 0
lengths = []
for sp in csp:
for i in xrange(1,len(sp)):
l = cspseglength(sp[i-1],sp[i])
lengths.append(l)
total += l
return lengths, total
###
### Distance calculattion from point to arc
###
def between(c,x,y):
return x-STRAIGHT_TOLERANCE<=c<=y+STRAIGHT_TOLERANCE or y-STRAIGHT_TOLERANCE<=c<=x+STRAIGHT_TOLERANCE
def distance_from_point_to_arc(p, arc):
P0,P2,c,a = arc
dist = None
p = P(p)
r = (P0-c).mag()
if r>0 :
i = c + (p-c).unit()*r
alpha = ((i-c).angle() - (P0-c).angle())
if a*alpha<0:
if alpha>0: alpha = alpha-2*math.pi
else: alpha = 2*math.pi+alpha
if between(alpha,0,a) or min(abs(alpha),abs(alpha-a))<STRAIGHT_TOLERANCE :
return (p-i).mag(), [i.x, i.y]
else :
d1, d2 = (p-P0).mag(), (p-P2).mag()
if d1<d2 :
return (d1, [P0.x,P0.y])
else :
return (d2, [P2.x,P2.y])
def get_distance_from_csp_to_arc(sp1,sp2, arc1, arc2, tolerance = 0.001 ): # arc = [start,end,center,alpha]
n, i = 10, 0
d, d1, dl = (0,(0,0)), (0,(0,0)), 0
while i<1 or (abs(d1[0]-dl[0])>tolerance and i<2):
i += 1
dl = d1*1
for j in range(n+1):
t = float(j)/n
p = csp_at_t(sp1,sp2,t)
d = min(distance_from_point_to_arc(p,arc1), distance_from_point_to_arc(p,arc2))
d1 = max(d1,d)
n=n*2
return d1[0]
################################################################################
###
### Biarc function
###
### Calculates biarc approximation of cubic super path segment
### splits segment if needed or approximates it with straight line
###
################################################################################
def biarc(sp1, sp2, z1, z2, depth=0,):
def biarc_split(sp1,sp2, z1, z2, depth):
if depth<options.biarc_max_split_depth:
sp1,sp2,sp3 = cspbezsplit(sp1,sp2)
l1, l2 = cspseglength(sp1,sp2), cspseglength(sp2,sp3)
if l1+l2 == 0 : zm = z1
else : zm = z1+(z2-z1)*l1/(l1+l2)
return biarc(sp1,sp2,depth+1,z1,zm)+biarc(sp2,sp3,depth+1,z1,zm)
else: return [ [sp1[1],'line', 0, 0, sp2[1], [z1,z2]] ]
P0, P4 = P(sp1[1]), P(sp2[1])
TS, TE, v = (P(sp1[2])-P0), -(P(sp2[0])-P4), P0 - P4
tsa, tea, va = TS.angle(), TE.angle(), v.angle()
if TE.mag()<STRAIGHT_DISTANCE_TOLERANCE and TS.mag()<STRAIGHT_DISTANCE_TOLERANCE:
# Both tangents are zerro - line straight
return [ [sp1[1],'line', 0, 0, sp2[1], [z1,z2]] ]
if TE.mag() < STRAIGHT_DISTANCE_TOLERANCE:
TE = -(TS+v).unit()
r = TS.mag()/v.mag()*2
elif TS.mag() < STRAIGHT_DISTANCE_TOLERANCE:
TS = -(TE+v).unit()
r = 1/( TE.mag()/v.mag()*2 )
else:
r=TS.mag()/TE.mag()
TS, TE = TS.unit(), TE.unit()
tang_are_parallel = ((tsa-tea)%math.pi<STRAIGHT_TOLERANCE or math.pi-(tsa-tea)%math.pi<STRAIGHT_TOLERANCE )
if ( tang_are_parallel and
((v.mag()<STRAIGHT_DISTANCE_TOLERANCE or TE.mag()<STRAIGHT_DISTANCE_TOLERANCE or TS.mag()<STRAIGHT_DISTANCE_TOLERANCE) or
1-abs(TS*v/(TS.mag()*v.mag()))<STRAIGHT_TOLERANCE) ):
# Both tangents are parallel and start and end are the same - line straight
# or one of tangents still smaller then tollerance
# Both tangents and v are parallel - line straight
return [ [sp1[1],'line', 0, 0, sp2[1], [z1,z2]] ]
c,b,a = v*v, 2*v*(r*TS+TE), 2*r*(TS*TE-1)
if v.mag()==0:
return biarc_split(sp1, sp2, z1, z2, depth)
asmall, bsmall, csmall = abs(a)<10**-10,abs(b)<10**-10,abs(c)<10**-10
if asmall and b!=0: beta = -c/b
elif csmall and a!=0: beta = -b/a
elif not asmall:
discr = b*b-4*a*c
if discr < 0: raise ValueError, (a,b,c,discr)
disq = discr**.5
beta1 = (-b - disq) / 2 / a
beta2 = (-b + disq) / 2 / a
if beta1*beta2 > 0 : raise ValueError, (a,b,c,disq,beta1,beta2)
beta = max(beta1, beta2)
elif asmall and bsmall:
return biarc_split(sp1, sp2, z1, z2, depth)
alpha = beta * r
ab = alpha + beta
P1 = P0 + alpha * TS
P3 = P4 - beta * TE
P2 = (beta / ab) * P1 + (alpha / ab) * P3
def calculate_arc_params(P0,P1,P2):
D = (P0+P2)/2
if (D-P1).mag()==0: return None, None
R = D - ( (D-P0).mag()**2/(D-P1).mag() )*(P1-D).unit()
p0a, p1a, p2a = (P0-R).angle()%(2*math.pi), (P1-R).angle()%(2*math.pi), (P2-R).angle()%(2*math.pi)
alpha = (p2a - p0a) % (2*math.pi)
if (p0a<p2a and (p1a<p0a or p2a<p1a)) or (p2a<p1a<p0a) :
alpha = -2*math.pi+alpha
if abs(R.x)>1000000 or abs(R.y)>1000000 or (R-P0).mag<options.min_arc_radius :
return None, None
else :
return R, alpha
R1,a1 = calculate_arc_params(P0,P1,P2)
R2,a2 = calculate_arc_params(P2,P3,P4)
if R1==None or R2==None or (R1-P0).mag()<STRAIGHT_TOLERANCE or (R2-P2).mag()<STRAIGHT_TOLERANCE : return [ [sp1[1],'line', 0, 0, sp2[1], [z1,z2]] ]
d = get_distance_from_csp_to_arc(sp1,sp2, [P0,P2,R1,a1],[P2,P4,R2,a2])
if d > options.biarc_tolerance and depth<options.biarc_max_split_depth : return biarc_split(sp1, sp2, z1, z2, depth)
else:
if R2.mag()*a2 == 0 : zm = z2
else : zm = z1 + (z2-z1)*(R1.mag()*a1)/(R2.mag()*a2+R1.mag()*a1)
return [ [ sp1[1], 'arc', [R1.x,R1.y], a1, [P2.x,P2.y], [z1,zm] ], [ [P2.x,P2.y], 'arc', [R2.x,R2.y], a2, [P4.x,P4.y], [zm,z2] ] ]
################################################################################
###
### Inkscape helper functions
###
################################################################################
# Returns true if the given node is a layer
def is_layer(node):
return (node.tag == SVG_GROUP_TAG and
node.get(inkex.addNS("groupmode", "inkscape")) == "layer")
def get_layers(document):
layers = []
root = document.getroot()
for node in root.iterchildren():
if (is_layer(node)):
# Found an inkscape layer
layers.append(node)
return layers
def parse_layer_name(txt):
params = {}
try:
n = txt.index("[")
except ValueError:
layerName = txt.strip()
else:
layerName = txt[0:n].strip()
args = txt[n+1:].strip()
if (args.endswith("]")):
args = args[0:-1]
for arg in args.split(","):
try:
(field, value) = arg.split("=")
except:
raise ValueError("Invalid argument in layer '%s'" % layerName)
if (field == "feed"):
try:
value = float(value)
except:
raise ValueError("Invalid feed rate '%s'" % value)
params[field] = value
logger.write("%s == %s" % (field, value))
return (layerName, params)
################################################################################
###
### Gcode tools class
###
################################################################################
class Gcode_tools(inkex.Effect):
def __init__(self):
inkex.Effect.__init__(self)
outdir = os.getenv("HOME") or os.getenv("USERPROFILE")
if (outdir):
outdir = os.path.join(outdir, "Desktop")
else:
outdir = os.getcwd()
self.OptionParser.add_option("-d", "--directory", action="store", type="string", dest="directory", default=outdir, help="Directory for gcode file")
self.OptionParser.add_option("-f", "--filename", action="store", type="string", dest="file", default="-1.0", help="File name")
self.OptionParser.add_option("-u", "--Xscale", action="store", type="float", dest="Xscale", default="1.0", help="Scale factor X")
self.OptionParser.add_option("-v", "--Yscale", action="store", type="float", dest="Yscale", default="1.0", help="Scale factor Y")
self.OptionParser.add_option("-x", "--Xoffset", action="store", type="float", dest="Xoffset", default="0.0", help="Offset along X")
self.OptionParser.add_option("-y", "--Yoffset", action="store", type="float", dest="Yoffset", default="0.0", help="Offset along Y")
self.OptionParser.add_option("-p", "--feed", action="store", type="float", dest="feed", default="4.0", help="Feed rate in unit/min")
self.OptionParser.add_option("", "--biarc-tolerance", action="store", type="float", dest="biarc_tolerance", default="1", help="Tolerance used when calculating biarc interpolation.")
self.OptionParser.add_option("", "--biarc-max-split-depth", action="store", type="int", dest="biarc_max_split_depth", default="4", help="Defines maximum depth of splitting while approximating using biarcs.")
self.OptionParser.add_option("", "--unit", action="store", type="string", dest="unit", default="G21 (All units in mm)\n", help="Units")
self.OptionParser.add_option("", "--function", action="store", type="string", dest="function", default="Curve", help="What to do: Curve|Area|Area inkscape")
self.OptionParser.add_option("", "--tab", action="store", type="string", dest="tab", default="", help="Means nothing right now. Notebooks Tab.")
self.OptionParser.add_option("", "--generate_not_parametric_code",action="store", type="inkbool", dest="generate_not_parametric_code", default=False,help="Generated code will be not parametric.")
self.OptionParser.add_option("", "--double_sided_cutting",action="store", type="inkbool", dest="double_sided_cutting", default=False,help="Generate code for double-sided cutting.")
self.OptionParser.add_option("", "--draw-curves", action="store", type="inkbool", dest="drawCurves", default=False,help="Draws curves to show what geometry was processed")
self.OptionParser.add_option("", "--logging", action="store", type="inkbool", dest="logging", default=False, help="Enable output logging from the plugin")
self.OptionParser.add_option("", "--loft-distances", action="store", type="string", dest="loft_distances", default="10", help="Distances between paths.")
self.OptionParser.add_option("", "--loft-direction", action="store", type="string", dest="loft_direction", default="crosswise", help="Direction of loft's interpolation.")
self.OptionParser.add_option("", "--loft-interpolation-degree",action="store", type="float", dest="loft_interpolation_degree", default="2", help="Which interpolation use to loft the paths smooth interpolation or staright.")
self.OptionParser.add_option("", "--min-arc-radius", action="store", type="float", dest="min_arc_radius", default=".1", help="All arc having radius less than minimum will be considered as straight line")
def parse_curve(self, path):
# if self.options.Xscale!=self.options.Yscale:
# xs,ys = self.options.Xscale,self.options.Yscale
# self.options.Xscale,self.options.Yscale = 1.0, 1.0
# else :
xs,ys = 1.0,1.0
# ### Sort to reduce Rapid distance
# np = [p[0]]
# del p[0]
# while len(p)>0:
# end = np[-1][-1][1]
# dist = None
# for i in range(len(p)):
# start = p[i][0][1]
#
# dist = max( ( -( ( end[0]-start[0])**2+(end[1]-start[1])**2 ) ,i) , dist )
# np += [p[dist[1]][:]]
# del p[dist[1]]
# p = np[:]
lst = []
for subpath in path:
lst.append(
[[subpath[0][1][0]*xs, subpath[0][1][1]*ys], 'move', 0, 0]
)
for i in range(1,len(subpath)):
sp1 = [ [subpath[i-1][j][0]*xs, subpath[i-1][j][1]*ys] for j in range(3)]
sp2 = [ [subpath[i ][j][0]*xs, subpath[i ][j][1]*ys] for j in range(3)]
lst += biarc(sp1,sp2,0,0)
lst.append(
[[subpath[-1][1][0]*xs, subpath[-1][1][1]*ys], 'end', 0, 0]
)
return lst
def draw_curve(self, curve, group=None, style=BIARC_STYLE):
if group==None:
group = inkex.etree.SubElement( self.biarcGroup, SVG_GROUP_TAG )
s, arcn = '', 0
for si in curve:
if s!='':
if s[1] == 'line':
inkex.etree.SubElement( group, SVG_PATH_TAG,
{
'style': style['line'],
'd':'M %s,%s L %s,%s' % (s[0][0], s[0][1], si[0][0], si[0][1]),
'comment': str(s)
}
)
elif s[1] == 'arc':
arcn += 1
sp = s[0]
c = s[2]
a = ( (P(si[0])-P(c)).angle() - (P(s[0])-P(c)).angle() )%(2*math.pi) #s[3]
if s[3]*a<0:
if a>0: a = a-2*math.pi
else: a = 2*math.pi+a
r = math.sqrt( (sp[0]-c[0])**2 + (sp[1]-c[1])**2 )
a_st = ( math.atan2(sp[0]-c[0],- (sp[1]-c[1])) - math.pi/2 ) % (math.pi*2)
if a>0:
a_end = a_st+a
else:
a_end = a_st*1
a_st = a_st+a
inkex.etree.SubElement( group, inkex.addNS('path','svg'),
{
'style': style['biarc%s' % (arcn%2)],
inkex.addNS('cx','sodipodi'): str(c[0]),
inkex.addNS('cy','sodipodi'): str(c[1]),
inkex.addNS('rx','sodipodi'): str(r),
inkex.addNS('ry','sodipodi'): str(r),
inkex.addNS('start','sodipodi'): str(a_st),
inkex.addNS('end','sodipodi'): str(a_end),
inkex.addNS('open','sodipodi'): 'true',
inkex.addNS('type','sodipodi'): 'arc',
'comment': str(s)
})
s = si
def check_dir(self):
if (os.path.isdir(self.options.directory)):
if (os.path.isfile(self.options.directory+'/header')):
f = open(self.options.directory+'/header', 'r')
self.header = f.read()
f.close()
else:
self.header = HEADER_TEXT
if (os.path.isfile(self.options.directory+'/footer')):
f = open(self.options.directory+'/footer','r')
self.footer = f.read()
f.close()
else:
self.footer = FOOTER_TEXT
else:
inkex.errormsg(_("Directory does not exist!"))
return
# Turns a list of arguments into gcode-style parameters (eg (1, 2, 3) -> "X1 Y2 Z3"),
# taking scaling, offsets and the "parametric curve" setting into account
def make_args(self, c):
c = [c[i] if i<len(c) else None for i in range(6)]
if c[5] == 0:
c[5] = None
# next few lines generate the stuff at the front of the file - scaling, offsets, etc (adina)
if self.options.generate_not_parametric_code:
s = ["X", "Y", "Z", "I", "J", "K"]
s1 = ["","","","","",""]
# my replacement that hopefully makes sense (adina, june 22 2010)
m = [self.options.Xscale, -self.options.Yscale, 1,
self.options.Xscale, -self.options.Yscale, 1]
a = [self.options.Xoffset, self.options.Yoffset, 0, 0, 0, 0]
else:
s = ["X[", "Y[", "Z[", "I[", "J[", "K["]
s1 = ["*#1+#8]", "*#2+#9]", "]", "*#1]", "*#2]", "]"]
m = [1, -1, 1, 1, -1, 1]
a = [0, 0, 0, 0, 0, 0]
a[1] += self.pageHeight
#I think this is the end of generating the header stuff (adina, june 22 2010)
args = []
for i in range(6):
if c[i]!=None:
value = self.unitScale*(c[i]*m[i]+a[i])
args.append(s[i] + ("%f" % value) + s1[i])
return " ".join(args)
def generate_gcode(self, curve, depth, altfeed=None):
gcode = ''
if (altfeed):
# Use the "alternative" feed rate specified
f = " F%f" % altfeed
else:
if self.options.generate_not_parametric_code:
f = " F%f" % self.options.feed
else:
f = " F#4"
cwArc = "G02"
ccwArc = "G03"
if (self.flipArcs):
# The geometry is reflected, so invert the orientation of the arcs to match
(cwArc, ccwArc) = (ccwArc, cwArc)
# Peter's note: Here's where the 'laser on' and 'laser off' m-codes get appended to the GCODE generation
lg = 'G00'
for i in range(1,len(curve)):
s, si = curve[i-1], curve[i]
#feed = f if lg not in ['G01','G02','G03'] else ''
if (lg not in ["G01", "G02", "G03"]):
feed = f
else:
feed = ""
if s[1] == 'move':
# Traversals (G00) tend to signal either the toolhead coming up, going down, or indexing to a new workplace. All other cases seem to signal cutting.
gcode += LASER_OFF + "\nG00 " + self.make_args(si[0]) + "\n"
lg = 'G00'
elif s[1] == 'end':
lg = 'G00'
elif s[1] == 'line':
if lg=="G00":
#gcode += "G01 " + self.make_args([None,None,s[5][0]+depth]) + feed +"\n" + LASER_ON
gcode += LASER_ON
gcode += "G01 " +self.make_args(si[0]) + feed + "\n"
lg = 'G01'
elif s[1] == 'arc':
if lg=="G00":
#gcode += "G01 " + self.make_args([None,None,s[5][0]+depth]) + feed +"\n" + LASER_ON
gcode += LASER_ON
dx = s[2][0]-s[0][0]
dy = s[2][1]-s[0][1]
if abs((dx**2 + dy**2)*self.options.Xscale) > self.options.min_arc_radius:
r1 = P(s[0])-P(s[2])
r2 = P(si[0])-P(s[2])
if abs(r1.mag() - r2.mag()) < 0.001:
if (s[3] > 0):
gcode += cwArc
else:
gcode += ccwArc
gcode += " " + self.make_args(si[0] + [None, dx, dy, None]) + feed + "\n"
else:
r = (r1.mag()+r2.mag())/2
if (s[3] > 0):
gcode += cwArc
else:
gcode += ccwArc
gcode += " " + self.make_args(si[0]) + " R%f" % (r*self.options.Xscale) + feed + "\n"
lg = cwArc
else:
if lg=="G00":
#gcode += "G01 " + self.make_args([None,None,s[5][0]+depth]) + feed +"\n" + LASER_ON
gcode += LASER_ON
gcode += "G01 " +self.make_args(si[0]) + feed + "\n"
lg = 'G01'
if si[1] == 'end':
gcode += LASER_OFF
return gcode
def tool_change(self):
# Include a tool change operation
gcode = TOOL_CHANGE % (self.currentTool+1)
# Select the next available tool
self.currentTool = (self.currentTool+1) % 32
return gcode
################################################################################
###
### Curve to Gcode
###
################################################################################
def effect_curve(self, selected):
selected = list(selected)
# Set group
if self.options.drawCurves and len(selected)>0:
self.biarcGroup = inkex.etree.SubElement( selected[0].getparent(), SVG_GROUP_TAG )
options.Group = self.biarcGroup
# Recursively compiles a list of paths that are decendant from the given node
self.skipped = 0
def compile_paths(node, trans):
# Apply the object transform, along with the parent transformation
mat = node.get('transform', None)
if mat:
mat = simpletransform.parseTransform(mat)
trans = simpletransform.composeTransform(trans, mat)
if node.tag == SVG_PATH_TAG:
# This is a path object
if (not node.get("d")): return []
csp = cubicsuperpath.parsePath(node.get("d"))
if (trans):
simpletransform.applyTransformToPath(trans, csp)
return csp
elif node.tag == SVG_GROUP_TAG:
# This node is a group of other nodes
path = []
for child in node.iterchildren():
path += compile_paths(child, trans)
return path
logger.write("skipping " + str(node.tag))
self.skipped += 1
return []
# Compile a list of layers in this document. We compile a list of only the layers
# we need to use, so we can know ahead of time whether to put tool change
# operations between them.
layers = []
for layer in reversed(get_layers(self.document)):
for node in layer.iterchildren():
if (node in selected):
layers.append(layer)
break
layers = list(reversed(get_layers(self.document)))
# Loop over the layers and objects
gcode = ""
for layer in layers:
label = layer.get(SVG_LABEL_TAG).strip()
if (label.startswith("#")):
# Ignore everything selected in this layer
for node in layer.iterchildren():
if (node in selected):
selected.remove(node)
continue
# Parse the layer label text, which consists of the layer name followed
# by an optional number of arguments in square brackets.
try:
(layerName, layerParams) = parse_layer_name(label)
except ValueError,e:
inkex.errormsg(str(e))
return
# Check if the layer specifies an alternative (from the default) feed rate
altfeed = layerParams.get("feed", None)
logger.write("layer %s" % layerName)
if (layerParams):
logger.write("layer params == %s" % layerParams)
pathList = []
# Apply the layer transform to all objects within the layer
trans = layer.get('transform', None)
trans = simpletransform.parseTransform(trans)
for node in layer.iterchildren():
if (node in selected):
logger.write("node %s" % str(node.tag))
selected.remove(node)
pathList += compile_paths(node, trans)
else:
logger.write("skipping node %s" % node)
if (not pathList):
logger.write("no objects in layer")
continue
curve = self.parse_curve(pathList)
# If there are several layers, start with a tool change operation
if (len(layers) > 1):
gcode += LASER_OFF+"\n"
size = 60
gcode += "(%s)\n" % ("*"*size)
gcode += ("(***** LAYER: %%-%ds *****)\n" % (size-19)) % (layerName)
gcode += "(%s)\n" % ("*"*size)
gcode += "(MSG,Starting layer '%s')\n\n" % layerName
# Move the laser into the starting position (so that way it is positioned
# for testing the power level, if the user wants to change that).
arg = curve[0]
pt = arg[0]
gcode += "G00 " + self.make_args(pt) + "\n"
gcode += self.tool_change()
if (self.options.drawCurves):
self.draw_curve(curve)
gcode += self.generate_gcode(curve, 0, altfeed=altfeed)
# If there are any objects left over, it's because they don't belong
# to any inkscape layer (bug in inkscape?). Output those now.
if (selected):
pathList = []
# Use the identity transform (eg no transform) for the root objects
trans = simpletransform.parseTransform("")
for node in selected:
pathList += compile_paths(node, trans)
if (pathList):
curve = self.parse_curve(pathList)
if (self.options.drawCurves):
self.draw_curve(curve)
gcode += "\n(*** Root objects ***)\n"
if (layers):
# Include a tool change operation between the layers outputted above
# and these "orphaned" objects.
gcode += self.tool_change()
gcode += self.generate_gcode(curve, 0)
return gcode
def effect(self):
global options
options = self.options
selected = self.selected.values()
root = self.document.getroot()
self.pageHeight = float(root.get("height", None))
self.flipArcs = (self.options.Xscale*self.options.Yscale < 0)
self.currentTool = 0
self.filename = options.file.strip()
if (self.filename == "-1.0" or self.filename == ""):
inkex.errormsg(_("Please select an output file name."))
return
if (not self.filename.lower().endswith(GCODE_EXTENSION)):
# Automatically append the correct extension
self.filename += GCODE_EXTENSION
logger.enabled = self.options.logging
logger.write("thlaser script started")
logger.write("output file == %s" % self.options.file)
if len(selected)<=0:
inkex.errormsg(_("This extension requires at least one selected path."))
return
self.check_dir()
gcode = self.header;
if (self.options.unit == "mm"):
self.unitScale = 0.282222
gcode += "G21 (All units in mm)\n"
elif (self.options.unit == "in"):
self.unitScale = 0.011111
gcode += "G20 (All units in in)\n"
else:
inkex.errormsg(_("You must choose mm or in"))
return
if not self.options.generate_not_parametric_code:
gcode += """
#1 = %f (Scale X - relative to the dimensions shown in svg)
#2 = %f (Scale Y - relative to the dimensions shown in svg)
#4 = %f (Feed rate units/min)
#8 = %f (Offset x)
#9 = %f (Offset y)
\n""" % (self.options.Xscale, self.options.Yscale, self.options.feed, self.options.Xoffset, self.options.Yoffset)
#if self.options.function == 'Curve':
gcode += self.effect_curve(selected)
if (self.options.double_sided_cutting):
gcode += "\n\n(MSG,Please flip over material)\n\n"
# Include a tool change operation
gcode += self.tool_change()
logger.write("*** processing mirror image")
self.options.Yscale *= -1
self.flipArcs = not(self.flipArcs)
self.options.generate_not_parametric_code = True
self.pageHeight = 0
gcode += self.effect_curve(selected)
try:
f = open(self.options.directory+'/'+self.options.file, "w")
f.write(gcode + self.footer)
f.close()
except:
inkex.errormsg(_("Can not write to specified file!"))
return
if (self.skipped > 0):
inkex.errormsg(_("Warning: skipped %d object(s) because they were not paths" % self.skipped))
e = Gcode_tools()
e.affect()
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