Draw counterweight shape also on cover.

- cvr.py: run shape.make_base to draw counterweight shape
- cvr.py (label): parametrized position and size of label
- cvr.py (label): counterweight outline collided with label; shrink
  label and move it to an unoccupied area

cvr.py

@@ -1,5 +1,8 @@
 #!/usr/bin/python
 
+import shape
+
+
 #
 # gnuplot the outline
 #
@@ -10,6 +13,12 @@ def outline_gnuplot(points):
     print
 
 
+def gnuplot_line(x0, y0, x1, y1):
+    print x0, y0
+    print x1, y1
+    print
+
+
 #
 # make a HeeksCAD sketch of the outline
 #
@@ -48,6 +57,10 @@ def open_outline(*args):
     do(list(args))
 
 
+def line(*args):
+    do_line(*args)
+
+ 
 #
 # Make the cover sheet 2 mm larger than the counterweight on all sides. We need
 # the following exceptions to avoid mechanical interference:
@@ -111,19 +124,42 @@ def outline():
 
 
 def label():
+    u = 2
+    x = 40
+    y = 66
     # C
     open_outline(
-      25+5, 55+10, 
+      x+u, y+2*u, 
-      25, 55+10, 
+      x, y+2*u, 
-      25, 55, 
+      x, y, 
-      25+5, 55)
+      x+u, y)
+
+    x += u*1.6 
     # W
     open_outline(
-      33, 55+10, 
+      x, y+2*u, 
-      33, 55, 
+      x, y, 
-      33+2.5, 55+5, 
+      x+0.5*u, y+u, 
-      33+5, 55,
+      x+u, y,
-      33+5, 55+10)
+      x+u, y+2*u)
+
+
+# ----- Counterweight outline -------------------------------------------------
+
+
+lines = []
+
+
+def rect_outline(x0, y0, z0, x1, y1, z1):
+    global lines
+
+    lines.append((x0, y0, x0, y1))
+    lines.append((x1, y0, x1, y1))
+    lines.append((x0, y0, x1, y0))
+    lines.append((x0, y1, x1, y1))
+
+
+# ----- Main ------------------------------------------------------------------
 
 
 if __name__ == "__main__":
@@ -134,3 +170,15 @@ else:
 
 outline()
 label()
+
+shape.rect = rect_outline
+shape.make_base()
+
+if __name__ == "__main__":
+    for e in lines:
+	gnuplot_line(*e)
+else:
+    cad.sketch()
+    sk = cad.getlastobj()
+    for e in lines:
+	cad_line(sk, *e)