You're given the task of writing a simple console version of a drawing program. The functionality of the program is quite limited but should be extensible. The program should work as follows:
- create a new canvas.
- start drawing on the canvas by issuing various commands.
- quit.
The program should support the following commands:
| Command | Description |
|---|---|
C w h |
Should create a new canvas of width w and height h. |
L x1 y1 x2 y2 |
Should create a new line from (x1,y1) to (x2,y2). Currently only horizontal or vertical lines are supported. Horizontal and vertical lines will be drawn using the x character. |
R x1 y1 x2 y2 |
Should create a new rectangle, whose upper left corner is (x1,y1) and lower right corner is (x2,y2). Horizontal and vertical lines will be drawn using the x character. |
B x y c |
Should fill the entire area connected to (x,y) with colour 'c'. The behaviour of this is the same as that of the "bucket fill" tool in paint programs. |
Q |
Should quit the program. |
Below is a sample of the output your program should produce. User input is prefixed with enter command:.
enter command: C 20 4
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| |
| |
| |
| |
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enter command: L 1 2 6 2
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| |
|xxxxxx |
| |
| |
----------------------
enter command: L 6 3 6 4
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| |
|xxxxxx |
| x |
| x |
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enter command: R 16 1 20 3
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| xxxxx|
|xxxxxx x x|
| x xxxxx|
| x |
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enter command: B 10 3 o
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|oooooooooooooooxxxxx|
|xxxxxxooooooooox x|
| xoooooooooxxxxx|
| xoooooooooooooo|
----------------------
enter command: Q
In terminal navigate to the root of the project and run:
$ sbt runExample
[info] Running op.assessment.snd.Main
enter command:
C 20 10
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| |
| |
| |
| |
| |
| |
| |
| |
| |
| |
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enter command:
R 1 5 4 21
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| |
| |
| |
| |
| |
| xxxx |
| x x |
| x x |
| x x |
| x x |
----------------------
enter command:
R 10 -1 21 4
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| x |
| x |
| x |
| x |
| xxxxxxxxxx|
| xxxx |
| x x |
| x x |
| x x |
| x x |
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enter command:
B 3 3 -
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|----------x |
|----------x |
|----------x |
|----------x |
|----------xxxxxxxxxx|
|-xxxx---------------|
|-x x---------------|
|-x x---------------|
|-x x---------------|
|-x x---------------|
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