''' star.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, points, extDia, intDia, angle): 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, points = Conv.conv_is_int(points) if not valid and points: msg0 = _('POINTS') error += f'{msg0} {msg1}\n\n' valid, extDia = Conv.conv_is_float(extDia) if not valid and extDia: msg0 = _('OUTER DIA') error += f'{msg0} {msg1}\n\n' valid, intDia = Conv.conv_is_float(intDia) if not valid and intDia: msg0 = _('INNER DIA') error += f'{msg0} {msg1}\n\n' valid, angle = Conv.conv_is_float(angle) if not valid and angle: 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 points < 2: msg = _('More than two POINTS required') error += f'{msg}\n\n' if extDia == 0: msg = _('OUTER DIA cannot be zero') error += f'{msg}\n\n' if intDia == 0: msg = _('INNER DIA cannot be zero') error += f'{msg}\n\n' if intDia >= extDia: msg = _('INNER DIA must be less than OUTER DIA') error += f'{msg}\n\n' if error: return error extRadius = extDia / 2 intRadius = intDia / 2 angle = math.radians(angle) # get start pop if isCenter: xC = xOffset yC = yOffset else: xC = xOffset + extRadius * math.cos(math.radians(0)) yC = yOffset + extRadius * math.sin(math.radians(90)) # get all points pList = get_points(points, angle, xC, yC, extRadius, intRadius) # get external offset required extOffset = get_offset([pList[3][0], pList[3][1]], [pList[2][0], pList[2][1]], [pList[1][0], pList[1][1]], kerfWidth) # get internal offset required intOffset = get_offset([pList[0][0], pList[0][1]], [pList[1][0], pList[1][1]], [pList[2][0], pList[2][1]], kerfWidth) # get new points move = 0 if isCenter else extOffset if isExternal: pList = get_points(points, angle, xC + move, yC + move, extRadius + extOffset, intRadius + intOffset) else: pList = get_points(points, angle, xC - move, yC - move, extRadius - extOffset, intRadius - intOffset) 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 star {points})\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 isExternal: if leadinLength > 0: lAngle = math.atan2(pList[0][1] - pList[-1][1], pList[0][0] - pList[-1][0]) xlStart = pList[0][0] + leadinLength * math.cos(lAngle) ylStart = pList[0][1] + leadinLength * math.sin(lAngle) outTmp.write(f'G00 X{xlStart:.6f} Y{ylStart:.6f}\n') outTmp.write('M03 $0 S1\n') outTmp.write(f'G01 X{pList[0][0]} Y{pList[0][1]}\n') else: outTmp.write(f'G00 X{pList[0][0]} Y{pList[0][1]}\n') outTmp.write('M03 $0 S1\n') for i in range(points * 2, 0, -1): outTmp.write(f'G01 X{pList[i - 1][0]} Y{pList[i - 1][1]}\n') if leadoutLength > 0: lAngle = math.atan2(pList[0][1] - pList[1][1], pList[0][0] - pList[1][0]) xlEnd = pList[0][0] + leadoutLength * math.cos(lAngle) ylEnd = pList[0][1] + leadoutLength * math.sin(lAngle) outTmp.write(f'G01 X{xlEnd:.6f} Y{ylEnd:.6f}\n') else: if leadinLength > 0: lAngle = math.atan2(pList[-1][1] - pList[0][1], pList[-1][0] - pList[0][0]) xlStart = pList[points * 2 - 1][0] + leadinLength * math.cos(lAngle) ylStart = pList[points * 2 - 1][1] + leadinLength * math.sin(lAngle) outTmp.write(f'G00 X{xlStart:.6f} Y{ylStart:.6f}\n') outTmp.write('M03 $0 S1\n') outTmp.write(f'G01 X{pList[points * 2 - 1][0]} Y{pList[points * 2 - 1][1]}\n') outTmp.write(f'G01 X{pList[0][0]} Y{pList[0][1]}\n') else: outTmp.write(f'G00 X{pList[points * 2 - 1][0]} Y{pList[points * 2 - 1][1]}\n') outTmp.write('M03 $0 S1\n') outTmp.write(f'G01 X{pList[0][0]} Y{pList[0][1]}\n') for i in range(1, points * 2): outTmp.write(f'G01 X{pList[i][0]} Y{pList[i][1]}\n') if leadoutLength > 0: lAngle = math.atan2(pList[-1][1] - pList[-2][1], pList[-1][0] - pList[-2][0]) xlEnd = pList[-1][0] + leadoutLength * math.cos(lAngle) ylEnd = pList[-1][1] + leadoutLength * math.sin(lAngle) outTmp.write(f'G01 X{xlEnd:.6f} Y{ylEnd:.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(points, angle, xC, yC, extRadius, intRadius): pList = [] for i in range(points * 2): pAngle = angle + 2 * math.pi * i / (points * 2) if i % 2 == 0: x = xC + extRadius * math.cos(pAngle) y = yC + extRadius * math.sin(pAngle) else: x = xC + intRadius * math.cos(pAngle) y = yC + intRadius * math.sin(pAngle) 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) a = math.atan2(A[1] - B[1], A[0] - B[0]) c = math.atan2(C[1] - B[1], C[0] - B[0]) 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