1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
'''
ellipse.py
Copyright (C) 2021, 2022 Phillip A Carter
Copyright (C) 2021, 2022 Gregory D Carl
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.
'''
import os
import sys
import numpy
import gettext
for f in sys.path:
if '/lib/python' in f:
if '/usr' in f:
localeDir = 'usr/share/locale'
else:
localeDir = os.path.join('{}'.format(f.split('/lib')[0]),'share','locale')
break
gettext.install("linuxcnc", localedir=localeDir)
# Conv is the upstream calling module
def preview(Conv, fTmp, fNgc, fNgcBkp, \
matNumber, matName, \
preAmble, postAmble, \
leadinLength, leadoutLength, \
isCenter, xOffset, yOffset, \
kerfWidth, isExternal, \
width, height, angle, unitsPerMm):
error = ''
msg1 = _('entry is invalid')
valid, xOffset = Conv.conv_is_float(xOffset)
if not valid and xOffset:
msg0 = _('X ORIGIN')
error += '{} {}\n\n'.format(msg0, msg1)
valid, yOffset = Conv.conv_is_float(yOffset)
if not valid and yOffset:
msg0 = _('Y ORIGIN')
error += '{} {}\n\n'.format(msg0, msg1)
valid, leadinLength = Conv.conv_is_float(leadinLength)
if not valid and leadinLength :
msg0 = _('LEAD IN')
error += '{} {}\n\n'.format(msg0, msg1)
valid, leadoutLength = Conv.conv_is_float(leadoutLength)
if not valid and leadoutLength:
msg0 = _('LEAD OUT')
error += '{} {}\n\n'.format(msg0, msg1)
valid, width = Conv.conv_is_float(width)
if not valid and width:
msg0 = _('WIDTH')
error += '{} {}\n\n'.format(msg0, msg1)
valid, height = Conv.conv_is_float(height)
if not valid and height:
msg0 = _('HEIGHT')
error += '{} {}\n\n'.format(msg0, msg1)
valid, angle = Conv.conv_is_float(angle)
if not valid and angle:
msg0 = _('ANGLE')
error += '{} {}\n\n'.format(msg0, msg1)
valid, kerfWidth = Conv.conv_is_float(kerfWidth)
if not valid:
msg = _('Invalid Kerf Width entry in material')
error += '{}\n\n'.format(msg)
if error:
return error
if width == 0:
msg = _('WIDTH cannot be zero')
error += '{}\n\n'.format(msg)
if height == 0:
msg = _('HEIGHT cannot be zero')
error += '{}\n\n'.format(msg)
if error:
return error
angle = numpy.radians(angle)
if isExternal:
width += kerfWidth
height += kerfWidth
else:
width -= kerfWidth
height -= kerfWidth
if isCenter:
centerX = xOffset
centerY = yOffset
else:
centerX = xOffset + width / 2
centerY = yOffset + height / 2
leadInOffset = numpy.sin(45) * leadinLength
leadOutOffset = numpy.sin(45) * leadoutLength
# approx perimeter in mm
perim = (numpy.pi * (3 * (width + height) - numpy.sqrt((3 * width + height) * (width + 3 * height)))) * unitsPerMm
# number of points is 360 unless perimeter is > 360mm then have a segment length of 1mm
points = 360 if perim <= 360 else int(perim)
mult = float(360) / points
# start/end point of cut
start = int(points * 0.625)
# create the ellipse points in an array
array = numpy.linspace(0, points, points)
X = centerX + width / 2 * numpy.cos(numpy.radians(array * mult))
Y = centerY + height / 2 * numpy.sin(numpy.radians(array * mult))
# rotate the ellipse if required
for point in range(points):
x = X[point]
y = Y[point]
X[point] = x * numpy.cos(angle) - y * numpy.sin(angle)
Y[point] = x * numpy.sin(angle) + y * numpy.cos(angle)
# initialize files
outTmp = open(fTmp, 'w')
outNgc = open(fNgc, 'w')
inWiz = open(fNgcBkp, 'r')
# begin writing the gcode
for line in inWiz:
if '(new conversational file)' in line:
if('\\n') in preAmble:
outNgc.write('(preamble)\n')
for l in preAmble.split('\\n'):
outNgc.write('{}\n'.format(l))
else:
outNgc.write('\n{} (preamble)\n'.format(preAmble))
break
elif '(postamble)' in line:
break
elif 'm2' in line.lower() or 'm30' in line.lower():
continue
outNgc.write(line)
outTmp.write('\n(conversational ellipse)\n')
outTmp.write(';using material #{}: {}\n'.format(matNumber, matName))
outTmp.write('M190 P{}\n'.format(matNumber))
outTmp.write('M66 P3 L3 Q1\n')
outTmp.write('f#<_hal[plasmac.cut-feed-rate]>\n')
# get the angle of the first segment
delta_x = -1 - 0
delta_y = 1 - 0
theta_radians = numpy.arctan2(delta_y, delta_x)
if isExternal:
dX = X[start - 1] - X[start]
dY = Y[start - 1] - Y[start]
else:
dX = X[start] - X[start + 1]
dY = Y[start] - Y[start + 1]
segAngle = numpy.arctan2(dY, dX)
# set direction constants
right = numpy.radians(0)
up = numpy.radians(90)
left = numpy.radians(180)
down = numpy.radians(270)
# leadin points if required
if leadInOffset > 0:
if isExternal:
dir = [up, left]
else:
dir = [down, right]
xlcenter = X[start] + (leadInOffset * numpy.cos(segAngle + dir[0]))
ylcenter = Y[start] + (leadInOffset * numpy.sin(segAngle + dir[0]))
xlStart = xlcenter + (leadInOffset * numpy.cos(segAngle + dir[1]))
ylStart = ylcenter + (leadInOffset * numpy.sin(segAngle + dir[1]))
outTmp.write('g0 x{:.6f} y{:.6f}\n'.format(xlStart, ylStart))
outTmp.write('m3 $0 s1\n')
outTmp.write('g3 x{:.6f} y{:.6f} i{:.6f} j{:.6f}\n'.format(X[start], Y[start], xlcenter - xlStart, ylcenter - ylStart))
else:
outTmp.write('g0 x{:.6f} y{:.6f}\n'.format(X[start], Y[start]))
outTmp.write('m3 $0 s1\n')
# write the ellipse points
if isExternal:
for point in range(start, -1, -1):
outTmp.write('g1 x{0:.6f} y{1:.6f}\n'.format(X[point], Y[point]))
for point in range(points - 1, start - 1, -1):
outTmp.write('g1 x{0:.6f} y{1:.6f}\n'.format(X[point], Y[point]))
else:
for point in range(start, points, 1):
outTmp.write('g1 x{0:.6f} y{1:.6f}\n'.format(X[point], Y[point]))
for point in range(0, start + 1, 1):
outTmp.write('g1 x{0:.6f} y{1:.6f}\n'.format(X[point], Y[point]))
# leadout points if required
if leadOutOffset:
if isExternal:
dir = [up, right]
else:
dir = [down, left]
xlcenter = X[start] + (leadOutOffset * numpy.cos(segAngle + dir[0]))
ylcenter = Y[start] + (leadOutOffset * numpy.sin(segAngle + dir[0]))
xlEnd = xlcenter + (leadOutOffset * numpy.cos(segAngle + dir[1]))
ylEnd = ylcenter + (leadOutOffset * numpy.sin(segAngle + dir[1]))
outTmp.write('g3 x{:.6f} y{:.6f} i{:.6f} j{:.6f}\n'.format(xlEnd, ylEnd, xlcenter - X[start], ylcenter - Y[start]))
# finish off and close files
outTmp.write('m5 $0\n')
outTmp.close()
outTmp = open(fTmp, 'r')
for line in outTmp:
outNgc.write(line)
outTmp.close()
if('\\n') in postAmble:
outNgc.write('(postamble)\n')
for l in postAmble.split('\\n'):
outNgc.write('{}\n'.format(l))
else:
outNgc.write('\n{} (postamble)\n'.format(postAmble))
outNgc.write('m2\n')
outNgc.close()
return False
|
