72 lines
2.6 KiB
Markdown
72 lines
2.6 KiB
Markdown
# MIL-004 Cars
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## Metadata
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| Key | Value |
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| --- | --- |
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| ID | MIL-004 |
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| CrossReference | [BC-001], [PP-001] |
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| Language | en |
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| Domain | it |
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## Version History
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| Date | Status | Author | Reviewer | Change | Commit |
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| --- | --- | --- | --- | --- | --- |
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| 2026-10-13 | Accepted | Jens Tirsvad Nielsen | AI as stand-in for S01 | Initial version | [93d8321] |
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---
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## Purpose
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Decide that cars are generated, drawn as cars and moved correctly.
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## Deliverable
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A CarManager with create_cars and move_cars, and a registered car shape that shows a body, cabin and two wheels inside a 40 x 20 px footprint.
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## Go / No-Go Criteria
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| # | Criterion (objectively checkable) | Go | No-Go |
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| --- | --- | --- | --- |
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| 1 | Cars are generated at random y values, never in the top or bottom 50 px | Test over many samples | A car appears in the safe zone |
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| 2 | A new car is created on one in six loop runs | Test of the spawn rule | Wrong rate |
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| 3 | Cars move right to left by the current speed | Test of position change | Wrong direction |
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| 4 | Each car is drawn as a car, not a colour block, using the standard library only | Visual check and shape registration in code | A plain rectangle is shown or an image file is needed |
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## Dependencies
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| Depends on | Reason |
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| --- | --- |
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| MIL-003 | The previous step of the assignment must be accepted first |
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## Traceability
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| Business Case objective / KPI / user story | Reference |
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| --- | --- |
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| Objectives 1, 2 (step 2, bullet 2) | [BC-001] |
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## Ownership
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| Role | Stakeholder ID (SA) |
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| --- | --- |
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| Owner | S01 |
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| Approving reviewer | S01 |
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## Target Date
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2026-10-19 - within the two-week plan of [PP-001].
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## Tasks
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| # | Task | Summary | Needs its own Use Case/User Story? | Reference |
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| --- | --- | --- | --- | --- |
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| 1 | Design the car shape | Draw a car silhouette as a compound turtle Shape: lower body, cabin with window, two wheels, 40 x 20 px, pointing left. Register it once with register_shape. The colour comes from COLORS. | No | |
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| 2 | Implement create_cars | Random colour and random y inside the safe-zone limits, one car in six loop runs, each car using the registered shape. | No | |
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| 3 | Implement move_cars | Move every car left by the current speed and drop cars that left the screen. | No | |
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| 4 | Test CarManager | Pytest tests for spawn rule, safe zone and movement, with the display parts separated from the logic. | No | |
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---
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[BC-001]: ../business-case.md
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[PP-001]: ../project-plan.md
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[93d8321]: https://git.tirsystem.com/Tirsvad-Udemy-100-days-of-code/023-turtle-crossing/commit/93d83217622a6c555dca728fe10c83c35f8ac7e2
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