Skip to content

Exercise

Jump to bottom
Piotr Mludzik edited this page Apr 11, 2021 · 1 revision

Embroidery Wiki | Exercise

Story

Winter is coming, so does Christmas. You have a small enterprise that produces Christmas tree decoration. This year you bought a machine that is able to produce embroidery and is controllable through a programmable interface.

The machine requests a matrix as an input where 0 means an empty pixel, and positive integers mean different colors.

Your job is to design simple ornament matrices for this year's Christmas fair.

What are you going to learn?

You'll have to:

  • think in algorithms,
  • handle edge cases,
  • use parameters and default arguments,
  • use nested lists and advanced list manipulation.

Tasks

  1. Implement the draw_rectangle(width, height) function to return matrices like this:

    1 1 1 1 1 1 1          1 1 1 1 1 1 1          1 1 1 1 1 1 1
1 1 1 1 1 1 1          1 2 2 2 2 2 1          1 1 1 1 1 1 1
1 1 1 1 1 1 1          1 2 2 2 2 2 1          1 1 2 2 2 1 1
1 1 1 1 1 1 1          1 2 2 2 2 2 1          1 1 2 2 2 1 1
1 1 1 1 1 1 1          1 2 2 2 2 2 1          1 1 1 1 1 1 1
1 1 1 1 1 1 1          1 1 1 1 1 1 1          1 1 1 1 1 1 1
    • There are further optional parameters, border_color, fill_color, and border_width, all with default values of 1.
    • Called with default arguments, the returned matrix is a width-by-height rectangle shape marked by 1s.
    • The rectangle's border has border_color, and it is filled with fill_color.
    • The third optional parameter, border_width, specifies the width of the border.
    • There are no completely empty rows or columns in the returned matrix.
    • The function provides reasonable answers to edge cases (all combinations of integers as parameters).

  2. Implement the draw_triangle(height) function to return arrays like this:

    0 0 0 1 0 0 0          0 0 0 1 0 0 0
0 0 1 1 1 0 0          0 0 1 2 1 0 0
0 1 1 1 1 1 0          0 1 2 2 2 1 0
1 1 1 1 1 1 1          1 1 1 1 1 1 1
    • There are further optional parameters, border_color and fill_color, all with default values of 1.
    • Called with default arguments, the returned matrix consists of height rows and shows a tringle filled with 1s.
    • The triangle's border has border_color, and it is filled with fill_color.
    • There are no completely empty rows or columns in the returned matrix.
    • The function provides reasonable answers to edge cases (all combinations of integers as parameters).

  3. Implement the draw_christmas_tree(blocks) function to return arrays like this (when blocks == 4):

    0 0 0 0 0 1 0 0 0 0 0
0 0 0 0 1 2 1 0 0 0 0
0 0 0 1 2 2 2 1 0 0 0
0 0 0 0 1 2 1 0 0 0 0
0 0 0 1 2 2 2 1 0 0 0
0 0 1 2 2 2 2 2 1 0 0
0 0 0 1 2 2 2 1 0 0 0
0 0 1 2 2 2 2 2 1 0 0
0 1 2 2 2 2 2 2 2 1 0
0 0 1 2 2 2 2 2 1 0 0
0 1 2 2 2 2 2 2 2 1 0
1 1 1 1 1 1 1 1 1 1 1
    • There are further optional parameters, border_color and fill_color, all with default values of 1.
    • Called with default arguments, the returned matrix shows a Christmas tree made of blocks pieces of trapezoid blocks and filled with 1s. Each block has 3 rows, and each first row is one step shorter than the last row of the block above.
    • The triangle's border has border_color, and it is filled with fill_color.
    • There are no completely empty rows or columns in the returned matrix.
    • The function provides reasonable answers to edge cases (all combinations of integers as parameters).

  4. [OPTIONAL] Implement the draw_circle(radius) function to return arrays like this (truncated):

    0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 0 0 1 1 1 2 2 2 2 2 2 2 1 1 1 0 0 0 0 0 0 0 0 0
0 0 0 0 0 0 0 1 1 2 2 2 2 2 2 2 2 2 2 2 2 2 1 1 0 0 0 0 0 0 0
0 0 0 0 0 0 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 0 0 0 0 0 0
0 0 0 0 0 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 0 0 0 0 0
0 0 0 0 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 0 0 0 0
0 0 0 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 0 0 0
0 0 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 0 0
0 0 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 0 0
0 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 0
0 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 0
0 1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1 0
1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1
1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1
1 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 1
    • There are further optional parameters, border_color and fill_color, all with default values of 1.
    • Called with default arguments, the returned matrix shows a circle of radius r filled with 1s.
    • The returned matrix shows a continuous circle outline of border_color, and filled with fill_color.
    • There are no completely empty rows or columns in the returned matrix.
    • The function provides reasonable answers to edge cases (all combinations of integers as parameters).

General requirements

None

Hints

  • Try to solve the problems without distinguishing border and the inside first (i.e. border_color == fill_color), you may find them much easier this way.
  • This is especially true for the draw_circle function. Drawing a nice border for a circle is a rather advanced exercise, even though the only extra math needed for the solution is the Pythagorean theorem to calculate distance.

Starting repository

For your information: Unfortunately, GitHub Classroom has an unstable service regarding repository creation and imports. If your repository fails to create or there are issues with code imports you can do the following steps:

  1. Wait. Sometimes it gets done after 1-2 hours.
  2. Write to your mentors to do it manually for you.

In the meantime, we are working on an own solution to replace GitHub Classroom. We plan to have it in the first quarter of 2020.

Click here to clone your own Git repository: https://classroom.github.com/a/obBDAwez

Background materials

Acceptance review

You will need this only at review time, after completing the project. Use this form to record the review you provide for your peer.

Embroidery Wiki: Home | Exercise

  1. Home
  2. Exercise
Clone this wiki locally