Command line python tools for generating patterns, may be incomplete.

doc/pattern_tools/README.txt

+use
+python gen_pattern.py --help
+
+to generate various calibration svg calibration patterns.

doc/pattern_tools/gen_pattern.py

+"""gen_pattern.py
+To run:
+-c 10 -r 12 -o out.svg
+-T type of pattern, circles, acircles, checkerboard
+-s --square_size size of squares in pattern
+-u --units mm, inches, px, m
+-w  page width in units
+-h  page height in units
+"""
+
+from svgfig import *
+
+import sys
+import getopt
+
+class PatternMaker:
+  def __init__(self, cols,rows,output,units,square_size,page_width,page_height):
+    self.cols = cols
+    self.rows = rows
+    self.output = output
+    self.units = units
+    self.square_size = square_size
+    self.width = page_width
+    self.height = page_height
+    self.g = SVG("g") # the svg group container
+  def makeCirclesPattern(self):
+    spacing = self.square_size
+    r = spacing / 5.0 #radius is a 5th of the spacing TODO parameterize
+    for x in range(1,self.cols+1):
+      for y in range(1,self.rows+1):
+        dot = SVG("circle", cx=x * spacing, cy=y * spacing, r=r, fill="black")
+        self.g.append(dot)
+        
+  def makeACirclesPattern(self):
+    spacing = self.square_size
+    r = spacing / 5.0
+    row_shift = 0
+    for y in range(1,self.rows+1):
+      for x in range(1,self.cols+1):  
+        dot = SVG("circle", cx= (x + row_shift/2.0) * spacing, cy=y * spacing, r=r, fill="black")
+        self.g.append(dot)
+      #this makes the pattern asymetric
+      if row_shift is 0:
+        row_shift = 1
+      else:
+        row_shift = 0        
+  def makeCheckerboardPattern(self):
+    spacing = self.square_size
+    r = spacing / 5.0
+    for x in range(1,self.cols+1):
+      for y in range(1,self.rows+1):
+        #TODO make a checkerboard pattern
+        dot = SVG("circle", cx=x * spacing, cy=y * spacing, r=r, fill="black")
+        self.g.append(dot)
+  def save(self):
+    c = canvas(self.g,width="%d%s"%(self.width,self.units),height="%d%s"%(self.height,self.units),viewBox="0 0 %d %d"%(self.width,self.height))
+    c.inkview(self.output)
+        
+def makePattern(cols,rows,output,p_type,units,square_size,page_width,page_height):
+    width = page_width
+    spacing = square_size
+    height = page_height
+    r = spacing / 5.0
+    g = SVG("g") # the svg group container
+    for x in range(1,cols+1):
+      for y in range(1,rows+1):
+        if "circle" in p_type:
+          dot = SVG("circle", cx=x * spacing, cy=y * spacing, r=r, fill="black")
+        g.append(dot)
+    c = canvas(g,width="%d%s"%(width,units),height="%d%s"%(height,units),viewBox="0 0 %d %d"%(width,height))
+    c.inkview(output)
+    
+    
+def main():
+    # parse command line options, TODO use argparse for better doc
+    try:
+        opts, args = getopt.getopt(sys.argv[1:], "ho:c:r:T:u:s:w:h:", ["help","output","columns","rows",
+                                                                      "type","units","square_size","page_width",
+                                                                      "page_height"])
+    except getopt.error, msg:
+        print msg
+        print "for help use --help"
+        sys.exit(2)
+    output = "out.svg"
+    columns = 8
+    rows = 11
+    p_type = "circles"
+    units = "mm"
+    square_size = 20.0
+    page_width = 216    #8.5 inches
+    page_height = 279   #11 inches
+    # process options
+    for o, a in opts:
+        if o in ("-h", "--help"):
+            print __doc__
+            sys.exit(0)
+        elif o in ("-r", "--rows"):
+            rows = int(a)
+        elif o in ("-c", "--columns"):
+            columns = int(a)
+        elif o in ("-o", "--output"):
+            output = a
+        elif o in ("-T", "--type"):
+            p_type = a
+        elif o in ("-u", "--units"):
+            units = a
+        elif o in ("-s", "--square_size"):
+            square_size = float(a)
+        elif o in ("-w", "--page_width"):
+            page_width = float(a)
+        elif o in ("-h", "--page_height"):
+            page_height = float(a)
+    pm = PatternMaker(columns,rows,output,units,square_size,page_width,page_height)
+    #dict for easy lookup of pattern type
+    mp = {"circles":pm.makeCirclesPattern,"acircles":pm.makeACirclesPattern,"checkerboard":pm.makeCheckerboardPattern}
+    mp[p_type]()
+    #this should save pattern to output
+    pm.save()
+
+if __name__ == "__main__":
+    main()