Verify Game Mechanics

Compare implementation against design document specifications.

Arguments

$ARGUMENTS - Which mechanic to verify (movement, collision, laps, or all)

Verification Checklist

Movement Mechanics

From design doc:

NewPosition = CurrentPosition + CurrentVelocity + Acceleration
NewVelocity = CurrentVelocity + Acceleration

Verify:

1. Read movement code in Swift
2. Confirm formula matches
3. Play-test: Start at (5,5) with vel (0,0), accel (1,1) → should be at (6,6) with vel (1,1)

Collision Detection

From design doc:

• Use Bresenham's line algorithm
• Check ALL cells along path
• Any wall cell = crash

Verify:

1. Find collision code
2. Confirm Bresenham implementation
3. Play-test: Move toward wall, verify crash occurs

Crash Handling

From design doc:

• Lose 1 life
• Velocity resets to (0, 0)
• Respawn at nearest valid cell

Verify:

1. Find crash handling code
2. Confirm all three effects
3. Play-test: Crash, verify life decremented

Lap Counting

From design doc:

• Cross finish line in correct direction
• Use line segment intersection

Verify:

1. Find lap counting code
2. Confirm direction check
3. Play-test: Complete lap, verify counter

Report Format

Mechanic Verification: [name]
===========================
Design Spec: [quote from doc]
Implementation: [file:line]
Match: YES / NO / PARTIAL
Issues: [any discrepancies]