Spirograph™
Spirograph™ is a geometric drawing device that produces mathematical roulettes.
In 1827, Peter Desvignes developed the "Speiragraph", a device to create elaborate spiral drawings. In the 20th Century this became a popular children's toy, the Spirograph™. In addition to creating drawings, practical uses include creating patterns on banknotes that make it much more difficult to accurately create forgeries.
Make
Write a program that draws a roulette using the number of turns in the circle, the number of sides and length of a side in the shape.
Use this boilerplate code as a starting point:
Success Criteria
Remember to add a comment before a subprogram, condition or iteration to explain its purpose.
Complete the subprogram called `draw_shape` that:
- Takes two parameters: size and sides.
- size is the size in pixels of one side of the shape.
- sides is the number of sides the shape has. E.g. a pentagon has 5 sides, a hexagon has 6 sides.
- Draws one shape using the parameters.
Complete the subprogram called `spiro` that:
- Takes three parameters: turns, size and sides.
- turns is the number of turns to make to complete the circle.
- size is the size of one side of one shape.
- sides is the number of sides of one shape.
- Draws a number of shapes equal to turns to complete a circle.
Complete the `main program` so that:
- The `spiro` subprogram is called.
- The turtle is hidden once the roulette is finished.
Typical outputs from the program would be:
spiro(20, 50, 6)
Knowledge Organiser
Use these resources as a reference to help you meet the success criteria.
Programming guide:
Flowcharts:
Parsons:
Evaluate
Check that your program outputs the expected result and has met the success criteria.
spiro(20, 50, 6)
spiro(8, 50, 3)
spiro(3, 50, 5)
Check that you have:
- Used comments within the code to describe the purpose of subprograms, conditions and iterations.
- Used meaningful identifier names. That means the names of subprograms and variables indicate what they are for.
