--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/printrun-src/printrun/svg2gcode/ffgeom.py Fri Jun 03 09:42:44 2016 +0200
@@ -0,0 +1,141 @@
+#!/usr/bin/env python
+"""
+ ffgeom.py
+ Copyright (C) 2005 Aaron Cyril Spike, aaron@ekips.org
+
+ This file is part of FretFind 2-D.
+
+ FretFind 2-D 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.
+
+ FretFind 2-D 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 FretFind 2-D; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+"""
+import math
+try:
+ NaN = float('NaN')
+except ValueError:
+ PosInf = 1e300000
+ NaN = PosInf/PosInf
+
+class Point:
+ precision = 5
+ def __init__(self, x, y):
+ self.__coordinates = {'x' : float(x), 'y' : float(y)}
+ def __getitem__(self, key):
+ return self.__coordinates[key]
+ def __setitem__(self, key, value):
+ self.__coordinates[key] = float(value)
+ def __repr__(self):
+ return '(%s, %s)' % (round(self['x'],self.precision),round(self['y'],self.precision))
+ def copy(self):
+ return Point(self['x'],self['y'])
+ def translate(self, x, y):
+ self['x'] += x
+ self['y'] += y
+ def move(self, x, y):
+ self['x'] = float(x)
+ self['y'] = float(y)
+
+class Segment:
+ def __init__(self, e0, e1):
+ self.__endpoints = [e0, e1]
+ def __getitem__(self, key):
+ return self.__endpoints[key]
+ def __setitem__(self, key, value):
+ self.__endpoints[key] = value
+ def __repr__(self):
+ return repr(self.__endpoints)
+ def copy(self):
+ return Segment(self[0],self[1])
+ def translate(self, x, y):
+ self[0].translate(x,y)
+ self[1].translate(x,y)
+ def move(self,e0,e1):
+ self[0] = e0
+ self[1] = e1
+ def delta_x(self):
+ return self[1]['x'] - self[0]['x']
+ def delta_y(self):
+ return self[1]['y'] - self[0]['y']
+ #alias functions
+ run = delta_x
+ rise = delta_y
+ def slope(self):
+ if self.delta_x() != 0:
+ return self.delta_x() / self.delta_y()
+ return NaN
+ def intercept(self):
+ if self.delta_x() != 0:
+ return self[1]['y'] - (self[0]['x'] * self.slope())
+ return NaN
+ def distanceToPoint(self, p):
+ s2 = Segment(self[0],p)
+ c1 = dot(s2,self)
+ if c1 <= 0:
+ return Segment(p,self[0]).length()
+ c2 = dot(self,self)
+ if c2 <= c1:
+ return Segment(p,self[1]).length()
+ return self.perpDistanceToPoint(p)
+ def perpDistanceToPoint(self, p):
+ len = self.length()
+ if len == 0: return NaN
+ return math.fabs(((self[1]['x'] - self[0]['x']) * (self[0]['y'] - p['y'])) - \
+ ((self[0]['x'] - p['x']) * (self[1]['y'] - self[0]['y']))) / len
+ def angle(self):
+ return math.pi * (math.atan2(self.delta_y(), self.delta_x())) / 180
+ def length(self):
+ return math.sqrt((self.delta_x() ** 2) + (self.delta_y() ** 2))
+ def pointAtLength(self, len):
+ if self.length() == 0: return Point(NaN, NaN)
+ ratio = len / self.length()
+ x = self[0]['x'] + (ratio * self.delta_x())
+ y = self[0]['y'] + (ratio * self.delta_y())
+ return Point(x, y)
+ def pointAtRatio(self, ratio):
+ if self.length() == 0: return Point(NaN, NaN)
+ x = self[0]['x'] + (ratio * self.delta_x())
+ y = self[0]['y'] + (ratio * self.delta_y())
+ return Point(x, y)
+ def createParallel(self, p):
+ return Segment(Point(p['x'] + self.delta_x(), p['y'] + self.delta_y()), p)
+ def intersect(self, s):
+ return intersectSegments(self, s)
+
+def intersectSegments(s1, s2):
+ x1 = s1[0]['x']
+ x2 = s1[1]['x']
+ x3 = s2[0]['x']
+ x4 = s2[1]['x']
+
+ y1 = s1[0]['y']
+ y2 = s1[1]['y']
+ y3 = s2[0]['y']
+ y4 = s2[1]['y']
+
+ denom = ((y4 - y3) * (x2 - x1)) - ((x4 - x3) * (y2 - y1))
+ num1 = ((x4 - x3) * (y1 - y3)) - ((y4 - y3) * (x1 - x3))
+ num2 = ((x2 - x1) * (y1 - y3)) - ((y2 - y1) * (x1 - x3))
+
+ num = num1
+
+ if denom != 0:
+ x = x1 + ((num / denom) * (x2 - x1))
+ y = y1 + ((num / denom) * (y2 - y1))
+ return Point(x, y)
+ return Point(NaN, NaN)
+
+def dot(s1, s2):
+ return s1.delta_x() * s2.delta_x() + s1.delta_y() * s2.delta_y()
+
+
+# vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 fileencoding=utf-8 textwidth=99