Activities/Turtle Art: Difference between revisions

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@@ Line 541: / Line 541: @@
 The following feature is only available in versions 44+ of Turtle Art.
-=== myblock.py ===
 And a block that can be programmed by the Pippy interface:
@@ Line 554: / Line 553: @@
 Examples:
+ def myblock(lc, x):
+    ###########################################################################
+    #
+    # Draw a dotted line of length x.
+    #
+    ###########################################################################
+    try:  # make sure x is a number
+       x = float(x)
+    except ValueError:
+        return
+    if lc.tw.canvas.pendown:
+        dist = 0
+        while dist+lc.tw.canvas.pensize < x:   # repeat drawing dots
+            lc.tw.canvas.setpen(True)
+            lc.tw.canvas.forward(1)
+            lc.tw.canvas.setpen(False)
+            lc.tw.canvas.forward((lc.tw.canvas.pensize*2)-1)
+            dist += (lc.tw.canvas.pensize*2)
+        lc.tw.canvas.forward(x-dist)           # make sure we have moved exactly x
+        lc.tw.canvas.setpen(True)
+    else:
+        lc.tw.canvas.forward(x)
+    return
+[[Image:TA-dotted-line.png]]
+You can pass a list of up to three arguments to tamyblock.py as in this example that converts the input to an rgb value.
   def myblock(lc, x):
@@ Line 580: / Line 606: @@
      return
- def myblock(lc, x):
+[[Image:TA-rgb.png]]
-    ###########################################################################
-    #
-    # Draw a dotted line of length x.
-    #
-    ###########################################################################
-    try:  # make sure x is a number
-       x = float(x)
-    except ValueError:
-        return
-    if lc.tw.canvas.pendown:
-        dist = 0
-        while dist+lc.tw.canvas.pensize < x:   # repeat drawing dots
-            lc.tw.canvas.setpen(True)
-            lc.tw.canvas.forward(1)
-            lc.tw.canvas.setpen(False)
-            lc.tw.canvas.forward((lc.tw.canvas.pensize*2)-1)
-            dist += (lc.tw.canvas.pensize*2)
-        lc.tw.canvas.forward(x-dist)           # make sure we have moved exactly x
-        lc.tw.canvas.setpen(True)
-    else:
-        lc.tw.canvas.forward(x)
-    return
-[[Image:TA-dotted-line.png]]
   def myblock(lc, x):