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'''
polygon.py
Copyright (C) 2020, 2021, 2022 Phillip A Carter
Copyright (C) 2020, 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 math
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, \
sides, diameter, sAngle, \
inStyle, diaOrLen):
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, sides = Conv.conv_is_int(sides)
if not valid and sides:
msg0 = _('SIDES')
error += '{} {}\n\n'.format(msg0, msg1)
valid, diameter = Conv.conv_is_float(diameter)
if not valid and diameter:
error += '{} {}\n\n'.format(diaOrLen, msg1)
valid, sAngle = Conv.conv_is_float(sAngle)
if not valid and sAngle:
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 sides < 3:
msg = _('More than two SIDES required')
error += '{}\n\n'.format(msg)
if diameter == 0:
msg = _('DIAMETER cannot be zero')
error += '{}\n\n'.format(msg)
if error:
return error
if inStyle == 0: # circumscribed
radius = diameter / 2
elif inStyle == 1: # inscribed
radius = (diameter / 2) / math.cos(math.radians(180 / sides))
else: # side length
radius = diameter / (2 * math.sin(math.radians(180 / sides)))
sAngle = math.radians(sAngle)
ijOffset = radius * math.sin(math.radians(45))
# get start point
if isCenter:
xS = float(xOffset)
yS = float(yOffset)
else:
xS = float(xOffset) + radius# * math.cos(math.radians(0))
yS = float(yOffset) + radius# * math.sin(math.radians(90))
leadInOffset = float(leadinLength) / (2 * math.pi * (90.0 / 360))
leadOutOffset = math.sin(math.radians(45)) * float(leadoutLength)
# get all points
pList = get_points(sides, sAngle, xS, yS, radius)
# get offset required
offset = get_offset([pList[2][0],pList[2][1]], [pList[1][0],pList[1][1]], [pList[0][0],pList[0][1]], kerfWidth)
# get new points
move = 0 if isCenter else offset
if isExternal:
pList = get_points(sides, sAngle, xS + move, yS + move, radius + offset)
else:
pList = get_points(sides, sAngle, xS - move, yS - move, radius - offset)
# get center
xCentre = (float(pList[0][0]) + float(pList[sides - 1][0])) / 2
yCentre = (float(pList[0][1]) + float(pList[sides - 1][1])) / 2
angle = math.atan2(float(pList[0][1]) - yCentre, float(pList[0][0]) - xCentre)
right = math.radians(0)
up = math.radians(90)
left = math.radians(180)
down = math.radians(270)
if isExternal:
dir = [down, right]
else:
dir = [up, left]
outTmp = open(fTmp, 'w')
outNgc = open(fNgc, 'w')
inWiz = open(fNgcBkp, 'r')
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 polygon {})\n'.format(sides))
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')
if leadInOffset > 0:
xlCentre = xCentre + (leadInOffset * math.cos(angle + dir[0]))
ylCentre = yCentre + (leadInOffset * math.sin(angle + dir[0]))
xlStart = xlCentre + (leadInOffset * math.cos(angle + dir[1]))
ylStart = ylCentre + (leadInOffset * math.sin(angle + 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(xCentre, yCentre, xlCentre - xlStart, ylCentre - ylStart))
else:
outTmp.write('g0 x{:.6f} y{:.6f}\n'.format(xCentre, yCentre))
outTmp.write('m3 $0 s1\n')
if isExternal:
for i in range(sides, 0, -1):
outTmp.write('g1 x{} y{}\n'.format(pList[i - 1][0], pList[i - 1][1]))
else:
for i in range(sides):
outTmp.write('g1 x{} y{}\n'.format(pList[i][0], pList[i][1]))
outTmp.write('g1 x{} y{}\n'.format(xCentre, yCentre))
if leadOutOffset > 0:
if isExternal:
dir = [down, left]
else:
dir = [up, right]
xlCentre = xCentre + (leadOutOffset * math.cos(angle + dir[0]))
ylCentre = yCentre + (leadOutOffset * math.sin(angle + dir[0]))
xlEnd = xlCentre + (leadOutOffset * math.cos(angle + dir[1]))
ylEnd = ylCentre + (leadOutOffset * math.sin(angle + dir[1]))
outTmp.write('g3 x{:.6f} y{:.6f} i{:.6f} j{:.6f}\n'.format(xlEnd, ylEnd , xlCentre - xCentre, ylCentre - yCentre))
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
pList = []
for i in range(sides):
angle = sAngle + 2 * math.pi * i / sides
x = xS + radius * math.cos(angle)
y = yS + radius * math.sin(angle)
pList.append(['{:.6f}'.format(x), '{:.6f}'.format(y)])
def get_points(sides, sAngle, xS, yS, radius):
pList = []
for i in range(sides):
angle = sAngle + 2 * math.pi * i / sides
x = xS + radius * math.cos(angle)
y = yS + radius * math.sin(angle)
pList.append([round(x, 3), round(y, 3)])
return pList
def get_offset(A, B, C, kerfWidth):
Ax, Ay = A[0] - B[0], A[1] - B[1]
Cx, Cy = C[0] - B[0], C[1] - B[1]
a = math.atan2(Ay, Ax)
c = math.atan2(Cy, Cx)
if a < 0: a += math.pi * 2
if c < 0: c += math.pi * 2
ang = (math.pi * 2 + c - a) if a > c else (c - a)
ang = math.radians(90) - (ang / 2)
adj = (kerfWidth / 2) / math.sin(ang)
ofs = math.tan(ang) * adj
return ofs
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