wip

index.html

@@ -19,16 +19,20 @@ This repository holds libraries of components commonly used in fab classes and l
 
 <div style="margin-left:5%;margin-right:5%;">
 
-<b><a href=https://www.autodesk.com/products/eagle>Eagle</a>:</b> <a href="eagle/fab.lbr">fab.lbr</a>
+<b><a href=https://gitlab.cba.mit.edu/pub/libraries/tree/master/eagle>Eagle</a></b>
 
 <p>
 
-<b><a href=http://kicad-pcb.org>KiCad</a>:</b> <a href="kicad/fab.mod">fab.mod</a> <a href="kicad/fab.lib">fab.lib</a>
+<b><a href=https://gitlab.cba.mit.edu/pub/libraries/tree/master/kicad>KiCad</a></b>
 
 <p>
 
-<b><a href=http://kokompe.cba.mit.edu>Kokompe</a>:</b> <a href=kokompe/pcb.cad>pcb.cad</a>
+<b><a href=https://gitlab.cba.mit.edu/pub/libraries/tree/master/kokompe>Kokompe</a></b>
 
 <p>
 
-<b><a href=https://www.mattkeeter.com/projects/kokopelli>Kokopelli</a>:</b> <a href=kokopelli/pcb.py>pcb.py</a>
+<b><a href=https://gitlab.cba.mit.edu/pub/libraries/tree/master/kokopelli>Kokopelli</a></b>
+
+<p>
+
+<b><a href=>Python</a></b>

python/frep.py

+#!/usr/bin/env python
+#
+# frep.py
+#    functional representation evaluation
+#
+# usage
+#    pcb.py | frep.py [dpi [filename]]
+#
+# Neil Gershenfeld 10/8/18
+# (c) Massachusetts Institute of Technology 2018
+#
+# This work may be reproduced, modified, distributed,
+# performed, and displayed for any purpose, but must
+# acknowledge this project. Copyright is retained and
+# must be preserved. The work is provided as is; no
+# warranty is provided, and users accept all liability.
+#
+
+#
+# import
+#
+
+import json,sys
+from numpy import *
+from PIL import Image
+
+#
+# read input
+#
+
+frep = json.load(sys.stdin)
+
+#
+# check arguments
+#
+
+if (frep['zmin'] != frep['zmax']):
+   print('> 2D not (yet) supported')
+   sys.exit()
+if (frep['type'] != 'RGB'):
+   print('types other than RGB not (yet) supported')
+   sys.exit()
+if (len(sys.argv) == 1):
+   print('output to out.png at 100 DPI')
+   filename = 'out.png'
+   dpi = 100
+elif (len(sys.argv) == 2):
+   dpi = sys.argv[1]
+   filename = 'out.png'
+   print('output to out.png at '+dpi+'DPI')
+   dpi = int(dpi)
+elif (len(sys.argv) == 3):
+   dpi = sys.argv[1]
+   filename = sys.argv[2]
+   print('output to '+filename+' at '+dpi+' DPI')
+   dpi = int(dpi)
+
+#
+# evaluate
+#
+
+print('evaluating ...')
+xmin = frep['xmin']
+xmax = frep['xmax']
+ymin = frep['ymin']
+ymax = frep['ymax']
+units = float(frep['mm_per_unit'])
+delta = (25.4/dpi)/units
+x = arange(xmin,xmax,delta)
+y = flip(arange(ymin,ymax,delta),0)
+X = outer(ones(y.size),x)
+Y = outer(y,ones(x.size))
+Z = frep['zmin']
+f = eval(frep['function'])
+
+#
+# construct image
+#
+
+m = zeros((y.size,x.size,3),dtype=uint8)
+m[:,:,0] = (f & 255)
+m[:,:,1] = ((f >> 8) & 255)
+m[:,:,2] = ((f >> 16) & 255)
+im = Image.fromarray(m,'RGB')
+im.save(filename,dpi=[dpi,dpi])