add ipc2581 primitives

doc/source/about.rst

@@ -0,0 +1,38 @@
+About PCB Tools
+===============
+
+PCB CAM Files
+~~~~~~~~~~~~~
+
+PCB design (artwork) files are most often stored in `Gerber` files. This is
+a generic term that may refer to `RS-274X (Gerber) <http://en.wikipedia.org/wiki/Gerber_format>`_, 
+`ODB++ <http://en.wikipedia.org/wiki/ODB%2B%2B>`_ , or `Excellon <http://en.wikipedia.org/wiki/Excellon_format>`_
+files.  These file formats are used by the CNC equipment used to manufacutre PCBs.
+
+PCB Tools provides a set of utilities for visualizing and working with PCB design files
+in a variety of formats. PCB Tools currently supports the following file formats:
+
+- Gerber (RS-274X)
+- Excellon
+
+with planned support for IPC-2581, IPC-D-356 Netlists, ODB++ and more.
+
+Visualization
+~~~~~~~~~~~~~~
+.. image:: ../../examples/composite_top.png
+   :alt: Rendering Example
+
+The PCB Tools module provides tools to visualize PCBs and export images in a variety of formats,
+including SVG and PNG.
+
+
+Future Plans
+~~~~~~~~~~~~
+We are working on adding the following features to PCB Tools:
+
+- Design Rules Checking
+- Editing
+- Panelization
+
+
+

doc/source/index.rst

@@ -11,7 +11,7 @@ Contents:
 .. toctree::
     :maxdepth: 1
 
-    intro
+    about
     documentation/index
 
 Indices and tables

gerber/gerber_statements.py

@@ -1,5 +1,19 @@
-#! /usr/bin/env python
+#!/usr/bin/env python
 # -*- coding: utf-8 -*-
+
+# copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+
+#     http://www.apache.org/licenses/LICENSE-2.0
+
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
 """
 Gerber (RS-274X) Statements
 ===========================

gerber/primitives.py

@@ -19,10 +19,11 @@
 
 
 class Primitive(object):
-    
-    def __init__(self, level_polarity='dark'):
+
+    def __init__(self, level_polarity='dark', rotation=0):
         self.level_polarity = level_polarity
-
+        self.rotation = rotation
+
     def bounding_box(self):
         """ Calculate bounding box
 
@@ -36,8 +37,8 @@ def bounding_box(self):
 class Line(Primitive):
     """
     """
-    def __init__(self, start, end, width, level_polarity='dark'):
-        super(Line, self).__init__(level_polarity)
+    def __init__(self, start, end, width, **kwargs):
+        super(Line, self).__init__(**kwargs)
         self.start = start
         self.end = end
         self.width = width
@@ -61,8 +62,8 @@ def bounding_box(self):
 class Arc(Primitive):
     """
     """
-    def __init__(self, start, end, center, direction, width, level_polarity='dark'):
-        super(Arc, self).__init__(level_polarity)
+    def __init__(self, start, end, center, direction, width, **kwargs):
+        super(Arc, self).__init__(**kwargs)
         self.start = start
         self.end = end
         self.center = center
@@ -139,8 +140,8 @@ def bounding_box(self):
 class Circle(Primitive):
     """
     """
-    def __init__(self, position, diameter, level_polarity='dark'):
-        super(Circle, self).__init__(level_polarity)
+    def __init__(self, position, diameter, **kwargs):
+        super(Circle, self).__init__(**kwargs)
         self.position = position
         self.diameter = diameter
 
@@ -161,11 +162,29 @@ def stroke_width(self):
         return self.diameter
 
 
+class Ellipse(Primitive):
+    """
+    """
+    def __init__(self, position, width, height, **kwargs):
+        super(Ellipse, self).__init__(**kwargs)
+        self.position = position
+        self.width = width
+        self.height = height
+
+    @property
+    def bounding_box(self):
+        min_x = self.position[0] - (self.width / 2.0)
+        max_x = self.position[0] + (self.width / 2.0)
+        min_y = self.position[1] - (self.height / 2.0)
+        max_y = self.position[1] + (self.height / 2.0)
+        return ((min_x, max_x), (min_y, max_y))
+
+
 class Rectangle(Primitive):
     """
     """
-    def __init__(self, position, width, height, level_polarity='dark'):
-        super(Rectangle, self).__init__(level_polarity)
+    def __init__(self, position, width, height, **kwargs):
+        super(Rectangle, self).__init__(**kwargs)
         self.position = position
         self.width = width
         self.height = height
@@ -193,11 +212,23 @@ def stroke_width(self):
         return max((self.width, self.height))
 
 
+class Diamond(Primitive):
+    pass
+
+
+class ChamferRectangle(Primitive):
+    pass
+
+
+class RoundRectangle(Primitive):
+    pass
+
+
 class Obround(Primitive):
     """
     """
-    def __init__(self, position, width, height, level_polarity='dark'):
-        super(Obround, self).__init__(level_polarity)
+    def __init__(self, position, width, height, **kwargs):
+        super(Obround, self).__init__(**kwargs)
         self.position = position
         self.width = width
         self.height = height
@@ -242,11 +273,12 @@ def subshapes(self):
                             self.height)
         return {'circle1': circle1, 'circle2': circle2, 'rectangle': rect}
 
+
 class Polygon(Primitive):
     """
     """
-    def __init__(self, position, sides, radius, level_polarity='dark'):
-        super(Polygon, self).__init__(level_polarity)
+    def __init__(self, position, sides, radius, **kwargs):
+        super(Polygon, self).__init__(**kwargs)
         self.position = position
         self.sides = sides
         self.radius = radius
@@ -263,8 +295,8 @@ def bounding_box(self):
 class Region(Primitive):
     """
     """
-    def __init__(self, points, level_polarity='dark'):
-        super(Region, self).__init__(level_polarity)
+    def __init__(self, points, **kwargs):
+        super(Region, self).__init__(**kwargs)
         self.points = points
 
     @property
@@ -277,6 +309,34 @@ def bounding_box(self):
         return ((min_x, max_x), (min_y, max_y))
 
 
+class RoundButterfly(Primitive):
+    """
+    """
+    def __init__(self, position, diameter, **kwargs):
+        super(RoundButterfly, self).__init__(**kwargs)
+        self.position = position
+        self.diameter = diameter
+
+    @property
+    def radius(self):
+        return self.diameter / 2.
+
+    @property
+    def bounding_box(self):
+        min_x = self.position[0] - self.radius
+        max_x = self.position[0] + self.radius
+        min_y = self.position[1] - self.radius
+        max_y = self.position[1] + self.radius
+        return ((min_x, max_x), (min_y, max_y))
+
+class SquareButterfly(Primitive):
+    pass
+
+
+class Donut(Primitive):
+    pass
+
+
 class Drill(Primitive):
     """
     """

gerber/rs274x.py

@@ -403,10 +403,10 @@ def _evaluate_coord(self, stmt):
                 end = (x, y)
                 width = self.apertures[self.aperture].stroke_width
                 if self.interpolation == 'linear':
-                    self.primitives.append(Line(start, end, width, self.level_polarity))
+                    self.primitives.append(Line(start, end, width, level_polarity=self.level_polarity))
                 else:
                     center = (start[0] + stmt.i, start[1] + stmt.j)
-                    self.primitives.append(Arc(start, end, center, self.direction, width, self.level_polarity))
+                    self.primitives.append(Arc(start, end, center, self.direction, width, level_polarity=self.level_polarity))
 
         elif stmt.op == "D02":
             pass