# This is a component of AXIS, a front-end for emc # Copyright 2005, 2006 Chris Radek # # 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 itertools translate = {'0': 0, '1': 1, '2': 2, '3': 3, '4': 4, '5': 5, '6': 6, '7': 7, '8': 8, '9': 9, '-': 10, '.': 11, 'X': 12, 'Y': 13, 'Z': 14, 'G': 15, 'U': 16, 'V': 17, 'W': 18} class Hershey: def __init__(self): self.hershey = ( # 0 [[(240.0, 20.0), (180.0, 40.0), (140.0, 100.0), (120.0, 200.0), (120.0, 260.0), (140.0, 360.0), (180.0, 420.0), (240.0, 440.0), (280.0, 440.0), (340.0, 420.0), (380.0, 360.0), (400.0, 260.0), (400.0, 200.0), (380.0, 100.0), (340.0, 40.0), (280.0, 20.0), (240.0, 20.0)]], # 1 [[(120.0, 100.0), (160.0, 80.0), (220.0, 20.0), (220.0, 440.0)]], # 2 [[(140.0, 120.0), (140.0, 100.0), (160.0, 60.0), (180.0, 40.0), (220.0, 20.0), (300.0, 20.0), (340.0, 40.0), (360.0, 60.0), (380.0, 100.0), (380.0, 140.0), (360.0, 180.0), (320.0, 240.0), (120.0, 440.0), (400.0, 440.0)]], # 3 [[(160.0, 20.0), (380.0, 20.0), (260.0, 180.0), (320.0, 180.0), (360.0, 200.0), (380.0, 220.0), (400.0, 280.0), (400.0, 320.0), (380.0, 380.0), (340.0, 420.0), (280.0, 440.0), (220.0, 440.0), (160.0, 420.0), (140.0, 400.0), (120.0, 360.0)]], # 4 [[(320.0, 20.0), (120.0, 300.0), (420.0, 300.0)], [(320.0, 20.0), (320.0, 440.0)]], # 5 [[(360.0, 20.0), (160.0, 20.0), (140.0, 200.0), (160.0, 180.0), (220.0, 160.0), (280.0, 160.0), (340.0, 180.0), (380.0, 220.0), (400.0, 280.0), (400.0, 320.0), (380.0, 380.0), (340.0, 420.0), (280.0, 440.0), (220.0, 440.0), (160.0, 420.0), (140.0, 400.0), (120.0, 360.0)]], # 6 [[(380.0, 80.0), (360.0, 40.0), (300.0, 20.0), (260.0, 20.0), (200.0, 40.0), (160.0, 100.0), (140.0, 200.0), (140.0, 300.0), (160.0, 380.0), (200.0, 420.0), (260.0, 440.0), (280.0, 440.0), (340.0, 420.0), (380.0, 380.0), (400.0, 320.0), (400.0, 300.0), (380.0, 240.0), (340.0, 200.0), (280.0, 180.0), (260.0, 180.0), (200.0, 200.0), (160.0, 240.0), (140.0, 300.0)]], # 7 [[(400.0, 20.0), (200.0, 440.0)], [(120.0, 20.0), (400.0, 20.0)]], # 8 [[(220.0, 20.0), (160.0, 40.0), (140.0, 80.0), (140.0, 120.0), (160.0, 160.0), (200.0, 180.0), (280.0, 200.0), (340.0, 220.0), (380.0, 260.0), (400.0, 300.0), (400.0, 360.0), (380.0, 400.0), (360.0, 420.0), (300.0, 440.0), (220.0, 440.0), (160.0, 420.0), (140.0, 400.0), (120.0, 360.0), (120.0, 300.0), (140.0, 260.0), (180.0, 220.0), (240.0, 200.0), (320.0, 180.0), (360.0, 160.0), (380.0, 120.0), (380.0, 80.0), (360.0, 40.0), (300.0, 20.0), (220.0, 20.0)]], # 9 [[(380.0, 160.0), (360.0, 220.0), (320.0, 260.0), (260.0, 280.0), (240.0, 280.0), (180.0, 260.0), (140.0, 220.0), (120.0, 160.0), (120.0, 140.0), (140.0, 80.0), (180.0, 40.0), (240.0, 20.0), (260.0, 20.0), (320.0, 40.0), (360.0, 80.0), (380.0, 160.0), (380.0, 260.0), (360.0, 360.0), (320.0, 420.0), (260.0, 440.0), (220.0, 440.0), (160.0, 420.0), (140.0, 380.0)]], # - [[(80, 260), (440, 260)]], # . [[(120, 400), (100, 420), (120, 440), (140, 420), (120, 400)]], # X [[(60, 20), (340, 440)], [(340, 20), (60, 440)]], # Y [[(40, 20), (200, 220), (200, 440)], [(360, 20), (200, 220)]], # Z [[(340, 20), (60, 440)], [(60, 20), (340, 20)], [(60, 440), (340, 440)]], # G [[(380.0, 80.0), (360.0, 40.0), (300.0, 20.0), (260.0, 20.0), (200.0, 40.0), (160.0, 100.0), (140.0, 200.0), (140.0, 300.0), (160.0, 380.0), (200.0, 420.0), (260.0, 440.0), (280.0, 440.0), (340.0, 420.0), (380.0, 380.0), (400.0, 320.0), (400.0, 280.0), (270.0, 280.0)]], # U [[(60, 20), (60, 400), (95, 410), (130, 420), (165, 430), (200, 440), (200, 440), (235, 430), (270, 420), (305, 410), (340, 400), (340, 20)]], # V [[(60, 20), (200, 440), (340, 20)]], # W [[(60, 20), (60, 400), (100, 440), (160, 440), (200, 400), (240, 440), (300, 440), (340, 400), (340, 20)], [(200, 400), (200, 300)]], ) # The preview renderer draws Hershey glyphs through the line shader via # string_polylines(); the legacy per-glyph GL display lists (glGenLists/ # glNewList) and the plot_digit/plot_string draw helpers that used them # are gone (they are removed from OpenGL core profiles). def string_polylines(self, s, frac=0.0, flip_y=False, flip_z=False, bbox=False): """Return a string's strokes as polylines in the local text frame. GL-free equivalent of ``plot_string``'s geometry: glyphs are laid out in the post-(1/440)-scale frame (each ~1 unit tall) with the same advance widths and ``frac`` offset, and the two readability flips applied. The caller decides ``flip_y``/``flip_z`` from ``modelview[2][2] < -0.001`` / ``modelview[1][1] < -0.001`` (the diagonal terms plot_string tests), and supplies the outer positioning transform itself. Returns a list of polylines, each a list of ``(x, y)`` points. """ frac_final = frac if flip_y: frac_final = 1.0 - frac_final if flip_z: frac_final = 1.0 - frac_final slen = self.string_len(s) def place(x440, y440): gx = x440 / 440.0 - slen * frac_final gy = y440 / 440.0 if flip_z: gx, gy = -gx, 1.0 - gy if flip_y: gx = -gx return (gx, gy) polylines = [] if bbox: # Same rectangle plot_string draws around the string (in 440-space). right = slen * 440.0 + 140.0 polylines.append([place(-140.0, -140.0), place(right, -140.0), place(right, 580.0), place(-140.0, 580.0), place(-140.0, -140.0)]) advance = 0.0 for c in s: digit = self.hershey[translate[c]] for stroke in digit: polylines.append([place(x + advance, 440.0 - y) for x, y in stroke]) if c == '1': advance += 260.0 elif c == '.': advance += 180.0 else: advance += 400.0 return polylines def string_len(self, s): l = 0.0 for c in s: if c == '1': l += 260.0 elif c == '.': l += 180.0 else: l += 400.0 return l/440.0