Into the third dimension!
Once your children have created flat "crystal flowers", etc. why not let them 'grow' shapes in 3 dimensions - Here's how!......
A unique feature of MSW LOGO is the ability to create shapes not only in 2 dimensions but also in 3D space. There is masses of potential for developing knowlege of angles, topology and language relating to real space by spending some time investigating this feature. Children with good spatial awareness will get a great deal from being allowed to explore their ideas here.
3D commands in MSW LOGO
The new commands to control the turtle in 3D space are simple to learn:
Just remember - Imagine the turtle is an aeroplane flying through the air and you are in the cockpit looking forward!
perspective - makes the MSW LOGO screen into it's 3D mode. The turtle will appear different since it is being viewed from a new perspective. It will initially be pointing straight up with a slight twist.
rightroll (or rr) - rolls the turtle to the right - You will need to enter an angle, e.g: rr 90
leftroll (or lr) - rolls the turtle to the left.
setpitch - dips the nose of the "flying turtle" up or down - You will need to enter an angle, e.g: setpitch -10 - will dip the nose of the turtle down by 10 degrees (note the use of a minus number - the alternative would be setpitch 350)
Everything else is just the same!
To make a sphere you will need to spin round a circle in the 3D view:
In this example, the command perspective makes the screen display in 3D. The repeat command draws a circle with a radius of 100, then the rr 10 rolls the turtle 10 degrees to the right.
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Create this sphere procedure: to sphere Type sphere to start the procedure
You could hide the turtle with the hideturtle (ht) command if you wanted!
Use arc rather than circle to create other interesting 3D shapes.
How do you make a cube? (Hint: Each side is a square)
Use a recursive procedure to create a cone!
The possibilites are endless!
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Challenges in 3D:
The content and images within these pages is the copyright (c) of Mark Robinson and the children of Ambleside C.E. Primary School, 1999.
