From 59278c6201e5863ab7a23e5f7e3d73737a4af56f Mon Sep 17 00:00:00 2001
From: Dan White <dan@whiteaudio.com>
Date: Mon, 16 Jan 2012 12:18:19 -0600
Subject: [PATCH] Footprint generator library

---
 test-pcb/fp/footprinter.py | 142 +++++++++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 test-pcb/fp/footprinter.py

diff --git a/test-pcb/fp/footprinter.py b/test-pcb/fp/footprinter.py
new file mode 100644
index 0000000..9030425
--- /dev/null
+++ b/test-pcb/fp/footprinter.py
@@ -0,0 +1,142 @@
+# -*- coding: ASCII -*-
+'''footprinter.py version 0.1
+Classes for gEDA PCB footprint creation
+according to <http://www.brorson.com/gEDA/land_patterns_20050129.pdf>
+Copyright (c) 2011, Mel Wilson <mwilson@melwilsonsoftware.ca>
+
+Licence: Creative Commons Attribution 3.0 Unported License
+<http://creativecommons.org/licenses/by-sa/3.0/>
+'''
+
+def mm (x):
+	'''Get standard units from a measurement in millimeters.'''
+	return x * 1e5 / 25.4
+	
+def mil (x):
+	'''Get standard units from a measurement in thousandths of an inch.'''
+	return x * 100
+	
+def inch (x):
+	'''Get standard units from a measurement in inches.'''
+	return x * 1e5
+	
+def hmil (x):
+	'''For completeness: Get standard units from a measurement in hundreths of a mil.'''
+	return x
+
+class Footprint (object):
+	def __init__ (self, padpins=None, linearcs=None, sflags='', description=''):
+		if padpins is None:	padpins = []
+		if linearcs is None:	linearcs = []
+		self.mx = 1000
+		self.my = 1000
+		self.tx = 600
+		self.ty = 600
+		self.tdir = 0
+		self.tscale = 100
+		self.tsflags = ''
+		self.sflags = sflags
+		self.pads = padpins
+		self.lines = linearcs
+		self.description = description
+		
+	def file_element (self, filepath):
+		'''Write the footprint to a PCB-compatible file.'''
+		with open (filepath, 'wt') as f:
+			self.write (f)
+			
+	def write (self, f):
+		f.write ('Element ["%s" "%s" "" "" %d %d %d %d %d %d "%s"]\n'
+			% (self.sflags, self.description, self.mx, self.my
+			, self.tx, self.ty, self.tdir, self.tscale, self.tsflags)
+			)
+		f.write ('(\n')
+		for p in self.pads:
+			p.write (f)
+		for L in self.lines:
+			L.write (f)
+		f.write (')\n')
+			
+			
+class Pad (object):
+	def __init__ (self, number, padrect, trace_clearance, mask_clearance, name='', sflags=''):
+		px1, py1, px2, py2 = padrect	# x,y of diagonally opposite corners
+		thickness = min (abs (px1-px2), abs (py1-py2))
+		t2 = thickness/2
+		# find the centerline of the pad ..
+		if px1 < px2:
+			rx1, rx2 = px1 + t2, px2 - t2
+		else:
+			rx1, rx2 = px1 - t2, px1 + t2
+		if py1 < py2:
+			ry1, ry2 = py1 + t2, py2 - t2
+		else:
+			ry1, ry2 = py1 - t2, py1 + t2
+		self.rx1 = rx1
+		self.ry1 = ry1
+		self.rx2 = rx2
+		self.ry2 = ry2
+		self.thickness = thickness
+		self.clearance = trace_clearance
+		#~ self.mask = mask
+		self.mask = thickness + mask_clearance*2
+		self.name = name
+		self.number = number
+		self.sflags = sflags
+		
+	def write (self, f):
+		f.write ('Pad [%d %d %d %d %d %d %d "%s" "%s" "%s"]\n'
+			% (self.rx1, self.ry1, self.rx2, self.ry2
+				, self.thickness, self.clearance, self.mask
+				, self.name, self.number, self.sflags
+				)
+			)			
+			
+class Pin (object):
+	def __init__ (self, number, rx, ry, thickness, trace_clearance, mask_clearance, drill, name='', sflags=''):
+		self.rx = rx
+		self.ry = ry
+		self.thickness = thickness
+		self.clearance = trace_clearance
+		#~ self.mask = mask
+		self.mask = thickness + mask_clearance*2
+		self.drill = drill
+		self.name = str (name)
+		self.number = str (number)
+		self.sflags = sflags
+		
+	def write (self, f):
+		f.write ('Pin [%d %d %d %d %d %d "%s" "%s" "%s"]\n'
+			% (self.rx, self.ry
+				, self.thickness, self.clearance, self.mask, self.drill
+				, self.name, self.number, self.sflags
+				)
+			)			
+
+class ElementLine (object):
+	def __init__ (self, rx1, ry1, rx2, ry2, thickness):
+		self.rx1 = rx1
+		self.ry1 = ry1
+		self.rx2 = rx2
+		self.ry2 = ry2
+		self.thickness = thickness
+	
+	def write (self, f):
+		f.write ('ElementLine [%d %d %d %d %d]\n'
+			% (self.rx1, self.ry1, self.rx2, self.ry2, self.thickness)
+			)			
+	
+class ElementArc (object):
+	def __init__ (self, rx, ry, width, height, start_angle, delta_angle, thickness):
+		self.rx = rx
+		self.ry = ry
+		self.width = width
+		self.height = height
+		self.start_angle = start_angle
+		self.delta_angle = delta_angle
+		self.thickness = thickness
+	
+	def write (self, f):
+		f.write ('ElementArc [%d %d %d %d %d %d %d]\n'
+			% (self.rx, self.ry, self.width, self.height, self.start_angle, self.delta_angle, self.thickness)
+			)
-- 
2.25.1