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Task: MIL-001#3

2026-10-13 13:50:47 +08:00

MIL-004 Cars

Metadata

Date	Status	Author	Reviewer	Change	Commit
2026-10-13	Accepted	Jens Tirsvad Nielsen	AI as stand-in for S01	Initial version	93d8321

Decide that cars are generated, drawn as cars and moved correctly.

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.

#	Criterion (objectively checkable)	Go	No-Go
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
2	A new car is created on one in six loop runs	Test of the spawn rule	Wrong rate
3	Cars move right to left by the current speed	Test of position change	Wrong direction
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

Depends on	Reason
MIL-003	The previous step of the assignment must be accepted first

Business Case objective / KPI / user story	Reference
Objectives 1, 2 (step 2, bullet 2)	BC-001

Role	Stakeholder ID (SA)
Owner	S01
Approving reviewer	S01

2026-10-19 - within the two-week plan of PP-001.

#	Task	Summary	Needs its own Use Case/User Story?
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
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
3	Implement move_cars	Move every car left by the current speed and drop cars that left the screen.	No
4	Test CarManager	Pytest tests for spawn rule, safe zone and movement, with the display parts separated from the logic.	No