Logo challenge 5 - patch
Using LOGO, can you construct elegant procedures that will draw
this family of 'floor coverings'?
Age
11 to 16
Challenge level
Problem
Image
Can you construct elegant procedures that will draw the squares and triangles and then this basic unit for a family of 'floor coverings'?
Can you construct procedures for tiling patterns based on this set of tiles?
Others have called them patches. Can you see why?
Teachers' Resources
You will need procedures for:
- square
- triangle
- the patch itself.
How is the patch made?
You could decide to draw only some of the shapes as the rest
(say the triangle at the centre will be defined by the squares
around it.
How about colouring the squares in?
Here are the commands you will need:
SETFLOODCOLOR < n> - where n can be any number from 1 to
15
FILL - - - - - - - - - this fills the shape with your flood
colour.
Note that you have to be inside a shape to fill it.
Here is an example of drawing an equilateral triangle - moving
inside it to fill it the returning the turtle to the starting
point. Notice also that you need to lift the pen to move it into
the shape and put it down again:
to filltri
REPEAT 3 [FD 40 RT 120]
PU RT30 FD 2 PD
SETFLOODCOLOR 8
FILL
BK 2 LT 30
end
Image
Image
