''' polygon.py Copyright (C) 2020 - 2024 Phillip A Carter Copyright (C) 2020 - 2024 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(f'{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 += f'{msg0} {msg1}\n\n' valid, yOffset = Conv.conv_is_float(yOffset) if not valid and yOffset: msg0 = _('Y ORIGIN') error += f'{msg0} {msg1}\n\n' valid, leadinLength = Conv.conv_is_float(leadinLength) if not valid and leadinLength: msg0 = _('LEAD IN') error += f'{msg0} {msg1}\n\n' valid, leadoutLength = Conv.conv_is_float(leadoutLength) if not valid and leadoutLength: msg0 = _('LEAD OUT') error += f'{msg0} {msg1}\n\n' valid, sides = Conv.conv_is_int(sides) if not valid and sides: msg0 = _('SIDES') error += f'{msg0} {msg1}\n\n' valid, diameter = Conv.conv_is_float(diameter) if not valid and diameter: error += f'{diaOrLen} {msg1}\n\n' valid, sAngle = Conv.conv_is_float(sAngle) if not valid and sAngle: msg0 = _('ANGLE') error += f'{msg0} {msg1}\n\n' valid, kerfWidth = Conv.conv_is_float(kerfWidth) if not valid: msg = _('Invalid Kerf Width entry in material') error += f'{msg}\n\n' if error: return error if sides < 3: msg = _('More than two SIDES required') error += f'{msg}\n\n' if diameter == 0: msg = _('DIAMETER cannot be zero') error += f'{msg}\n\n' 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) # 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: line = line.strip() if line and line[0] not in ';': if '(new conversational file)' in line: if('\\n') in preAmble: outNgc.write('(preamble)\n') for l in preAmble.split('\\n'): outNgc.write(f'{l}\n') else: outNgc.write(f'\n{preAmble} (preamble)\n') break elif '(postamble)' in line: break elif 'M2' in line.upper() or 'M02' in line.upper() or 'M30' in line.upper(): continue outNgc.write(f"{line}\n") outTmp.write(f'\n(conversational polygon {sides})\n') outTmp.write(f';using material #{matNumber}: {matName}\n') outTmp.write(f'M190 P{matNumber}\n') 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(f'G00 X{xlStart:.6f} Y{ylStart:.6f}\n') outTmp.write('M03 $0 S1\n') outTmp.write(f'G03 X{xCentre:.6f} Y{yCentre:.6f} I{xlCentre - xlStart:.6f} J{ylCentre - ylStart:.6f}\n') else: outTmp.write(f'G00 X{xCentre:.6f} Y{yCentre:.6f}\n') outTmp.write('M03 $0 S1\n') if isExternal: for i in range(sides, 0, -1): outTmp.write(f'G01 X{pList[i - 1][0]} Y{pList[i - 1][1]}\n') else: for i in range(sides): outTmp.write(f'G01 X{pList[i][0]} Y{pList[i][1]}\n') outTmp.write(f'G01 X{xCentre} Y{yCentre}\n') 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(f'G03 X{xlEnd:.6f} Y{ylEnd:.6f} I{xlCentre - xCentre:.6f} J{ylCentre - yCentre:.6f}\n') outTmp.write('M05 $0\n') outTmp.close() outTmp = open(fTmp, 'r') for line in outTmp: outNgc.write(line) outTmp.close() if('\\n') in postAmble: outNgc.write('\n(postamble)\n') for l in postAmble.split('\\n'): outNgc.write(f'{l}\n') else: outNgc.write(f'\n{postAmble} (postamble)\n') outNgc.write('M02\n') outNgc.close() return False 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