Initial commit

2025-07-04 20:25:20 +03:00
commit e2b0221d80
73 changed files with 22186 additions and 0 deletions
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+import sys
+
+# Make an SVG image of a blank, indexed grid.
+# Christian Hill, August 2018.
+
+# SIZE is the grid image size, including padding around all sides of PAD.
+SIZE = 600
+PAD = 40
+
+try:
+    n = int(sys.argv[1])
+except (IndexError, ValueError):
+    print('Usage: {} n\nwhere n is the grid size.'.format(sys.argv[0]))
+    sys.exit(1)
+
+# output SVG image filename, size of the grid within the image.
+filename = 'blank_grid-{n}x{n}.svg'.format(n=n)
+c_size = (SIZE - 2*PAD) / n
+
+def _get_letter_coord(i):
+    """Return the letter A, B, C, ... corresponding to i = 1, 2, 3, ..."""
+    return chr(i+64)
+
+with open(filename, 'w') as fo:
+    # The SVG preamble and styles.
+    print('<?xml version="1.0" encoding="utf-8"?>\n'
+
+    '<svg xmlns="http://www.w3.org/2000/svg"\n' + ' '*5 +
+         'xmlns:xlink="http://www.w3.org/1999/xlink" width="{}" height="{}" >'
+            .format(SIZE, SIZE), file=fo)
+    print("""
+    <defs>
+    <style type="text/css"><![CDATA[
+
+    line {
+        stroke-width: 1px;
+        stroke: #888;
+    }
+
+    ]]></style>
+    </defs>
+    """, file=fo)
+
+    # We need n+1 lines to mark out n cells and two nested loops; write both
+    # coordinate labels in the outer loop.
+    v = PAD // 2
+    for i in range(n+1):
+        if i:
+            u = PAD + c_size*(i-0.5)
+            print('<text x="{}" y="{}" text-anchor="middle" '
+                  'dominant-baseline="central">{}</text>'.format(u, SIZE-v,
+                  _get_letter_coord(i)), file=fo)
+            print('<text x="{}" y="{}" text-anchor="middle" '
+                  'dominant-baseline="central">{}</text>'.format(v, SIZE-u,
+                  str(i)), file=fo)
+        for j in range(n+1):
+            x1 = x2 = PAD + i*c_size
+            y1, y2 = PAD, SIZE-PAD
+            print('<line x1="{}" y1="{}" x2="{}" y2="{}"/>'.format(
+                  x1, y1, x2, y2), file=fo)
+            print('<line x1="{}" y1="{}" x2="{}" y2="{}"/>'.format(
+                  y1, x1, y2, x2), file=fo)
+    print('</svg>', file=fo)