Import LinuxCNC source tree
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Wang Dequan
219
lib/python/plasmac/polygon.py
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219
lib/python/plasmac/polygon.py
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'''
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polygon.py
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Copyright (C) 2020 - 2024 Phillip A Carter
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Copyright (C) 2020 - 2024 Gregory D Carl
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along
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with this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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'''
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import os
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import sys
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import math
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import gettext
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for f in sys.path:
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if '/lib/python' in f:
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if '/usr' in f:
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localeDir = 'usr/share/locale'
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else:
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localeDir = os.path.join(f'{f.split("/lib")[0]}', 'share', 'locale')
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break
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gettext.install("linuxcnc", localedir=localeDir)
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# Conv is the upstream calling module
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def preview(Conv, fTmp, fNgc, fNgcBkp,
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matNumber, matName,
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preAmble, postAmble,
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leadinLength, leadoutLength,
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isCenter, xOffset, yOffset,
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kerfWidth, isExternal,
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sides, diameter, sAngle,
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inStyle, diaOrLen):
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error = ''
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msg1 = _('entry is invalid')
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valid, xOffset = Conv.conv_is_float(xOffset)
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if not valid and xOffset:
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msg0 = _('X ORIGIN')
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error += f'{msg0} {msg1}\n\n'
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valid, yOffset = Conv.conv_is_float(yOffset)
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if not valid and yOffset:
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msg0 = _('Y ORIGIN')
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error += f'{msg0} {msg1}\n\n'
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valid, leadinLength = Conv.conv_is_float(leadinLength)
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if not valid and leadinLength:
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msg0 = _('LEAD IN')
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error += f'{msg0} {msg1}\n\n'
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valid, leadoutLength = Conv.conv_is_float(leadoutLength)
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if not valid and leadoutLength:
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msg0 = _('LEAD OUT')
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error += f'{msg0} {msg1}\n\n'
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valid, sides = Conv.conv_is_int(sides)
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if not valid and sides:
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msg0 = _('SIDES')
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error += f'{msg0} {msg1}\n\n'
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valid, diameter = Conv.conv_is_float(diameter)
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if not valid and diameter:
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error += f'{diaOrLen} {msg1}\n\n'
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valid, sAngle = Conv.conv_is_float(sAngle)
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if not valid and sAngle:
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msg0 = _('ANGLE')
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error += f'{msg0} {msg1}\n\n'
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valid, kerfWidth = Conv.conv_is_float(kerfWidth)
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if not valid:
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msg = _('Invalid Kerf Width entry in material')
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error += f'{msg}\n\n'
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if error:
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return error
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if sides < 3:
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msg = _('More than two SIDES required')
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error += f'{msg}\n\n'
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if diameter == 0:
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msg = _('DIAMETER cannot be zero')
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error += f'{msg}\n\n'
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if error:
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return error
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if inStyle == 0: # circumscribed
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radius = diameter / 2
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elif inStyle == 1: # inscribed
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radius = (diameter / 2) / math.cos(math.radians(180 / sides))
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else: # side length
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radius = diameter / (2 * math.sin(math.radians(180 / sides)))
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sAngle = math.radians(sAngle)
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# get start point
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if isCenter:
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xS = float(xOffset)
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yS = float(yOffset)
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else:
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xS = float(xOffset) + radius # * math.cos(math.radians(0))
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yS = float(yOffset) + radius # * math.sin(math.radians(90))
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leadInOffset = float(leadinLength) / (2 * math.pi * (90.0 / 360))
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leadOutOffset = math.sin(math.radians(45)) * float(leadoutLength)
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# get all points
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pList = get_points(sides, sAngle, xS, yS, radius)
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# get offset required
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offset = get_offset([pList[2][0], pList[2][1]], [pList[1][0], pList[1][1]], [pList[0][0], pList[0][1]], kerfWidth)
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# get new points
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move = 0 if isCenter else offset
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if isExternal:
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pList = get_points(sides, sAngle, xS + move, yS + move, radius + offset)
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else:
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pList = get_points(sides, sAngle, xS - move, yS - move, radius - offset)
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# get center
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xCentre = (float(pList[0][0]) + float(pList[sides - 1][0])) / 2
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yCentre = (float(pList[0][1]) + float(pList[sides - 1][1])) / 2
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angle = math.atan2(float(pList[0][1]) - yCentre, float(pList[0][0]) - xCentre)
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right = math.radians(0)
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up = math.radians(90)
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left = math.radians(180)
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down = math.radians(270)
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if isExternal:
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dir = [down, right]
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else:
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dir = [up, left]
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outTmp = open(fTmp, 'w')
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outNgc = open(fNgc, 'w')
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inWiz = open(fNgcBkp, 'r')
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for line in inWiz:
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line = line.strip()
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if line and line[0] not in ';':
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if '(new conversational file)' in line:
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if('\\n') in preAmble:
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outNgc.write('(preamble)\n')
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for l in preAmble.split('\\n'):
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outNgc.write(f'{l}\n')
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else:
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outNgc.write(f'\n{preAmble} (preamble)\n')
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break
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elif '(postamble)' in line:
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break
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elif 'M2' in line.upper() or 'M02' in line.upper() or 'M30' in line.upper():
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continue
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outNgc.write(f"{line}\n")
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outTmp.write(f'\n(conversational polygon {sides})\n')
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outTmp.write(f';using material #{matNumber}: {matName}\n')
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outTmp.write(f'M190 P{matNumber}\n')
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outTmp.write('M66 P3 L3 Q1\n')
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outTmp.write('F#<_hal[plasmac.cut-feed-rate]>\n')
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if leadInOffset > 0:
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xlCentre = xCentre + (leadInOffset * math.cos(angle + dir[0]))
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ylCentre = yCentre + (leadInOffset * math.sin(angle + dir[0]))
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xlStart = xlCentre + (leadInOffset * math.cos(angle + dir[1]))
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ylStart = ylCentre + (leadInOffset * math.sin(angle + dir[1]))
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outTmp.write(f'G00 X{xlStart:.6f} Y{ylStart:.6f}\n')
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outTmp.write('M03 $0 S1\n')
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outTmp.write(f'G03 X{xCentre:.6f} Y{yCentre:.6f} I{xlCentre - xlStart:.6f} J{ylCentre - ylStart:.6f}\n')
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else:
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outTmp.write(f'G00 X{xCentre:.6f} Y{yCentre:.6f}\n')
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outTmp.write('M03 $0 S1\n')
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if isExternal:
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for i in range(sides, 0, -1):
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outTmp.write(f'G01 X{pList[i - 1][0]} Y{pList[i - 1][1]}\n')
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else:
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for i in range(sides):
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outTmp.write(f'G01 X{pList[i][0]} Y{pList[i][1]}\n')
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outTmp.write(f'G01 X{xCentre} Y{yCentre}\n')
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if leadOutOffset > 0:
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if isExternal:
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dir = [down, left]
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else:
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dir = [up, right]
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xlCentre = xCentre + (leadOutOffset * math.cos(angle + dir[0]))
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ylCentre = yCentre + (leadOutOffset * math.sin(angle + dir[0]))
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xlEnd = xlCentre + (leadOutOffset * math.cos(angle + dir[1]))
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ylEnd = ylCentre + (leadOutOffset * math.sin(angle + dir[1]))
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outTmp.write(f'G03 X{xlEnd:.6f} Y{ylEnd:.6f} I{xlCentre - xCentre:.6f} J{ylCentre - yCentre:.6f}\n')
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outTmp.write('M05 $0\n')
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outTmp.close()
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outTmp = open(fTmp, 'r')
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for line in outTmp:
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outNgc.write(line)
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outTmp.close()
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if('\\n') in postAmble:
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outNgc.write('\n(postamble)\n')
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for l in postAmble.split('\\n'):
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outNgc.write(f'{l}\n')
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else:
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outNgc.write(f'\n{postAmble} (postamble)\n')
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outNgc.write('M02\n')
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outNgc.close()
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return False
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def get_points(sides, sAngle, xS, yS, radius):
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pList = []
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for i in range(sides):
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angle = sAngle + 2 * math.pi * i / sides
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x = xS + radius * math.cos(angle)
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y = yS + radius * math.sin(angle)
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pList.append([round(x, 3), round(y, 3)])
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return pList
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def get_offset(A, B, C, kerfWidth):
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Ax, Ay = A[0] - B[0], A[1] - B[1]
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Cx, Cy = C[0] - B[0], C[1] - B[1]
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a = math.atan2(Ay, Ax)
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c = math.atan2(Cy, Cx)
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if a < 0:
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a += math.pi * 2
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if c < 0:
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c += math.pi * 2
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ang = (math.pi * 2 + c - a) if a > c else (c - a)
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ang = math.radians(90) - (ang / 2)
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adj = (kerfWidth / 2) / math.sin(ang)
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ofs = math.tan(ang) * adj
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return ofs
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