ProjectileEntityFactory

ProjectileEntityFactory creates a single projectile entity. It is called by WeaponSystem each time the player fires.

Usage

ProjectileEntityFactory(
    from: position,
    aimAt: direction,
    speed: 400,
    effectiveRange: 300,
    owner: playerEntity
).make(in: world)

Parameters

Parameter	Type	Description
position	SIMD2<Float>	Spawn position (typically the weapon's current position)
direction	SIMD2<Float>	Normalised aim vector
speed	Float	Initial speed (applied as direction × speed to VelocityComponent)
effectiveRange	Float	Max distance the projectile travels before being destroyed
owner	Entity	The entity that fired the projectile (used to avoid self-collision)

Components Added

Component	Initial Value
TransformComponent	position, rotation derived from direction, scale 1
VelocityComponent	direction × speed
SpriteComponent	"normalHandgunBullet", layer .projectile
ProjectileComponent	Damage 10, owner
EffectiveRangeComponent	base: effectiveRange
CollisionBoxComponent	6 × 6

Rotation

The bullet's rotation is computed from the aim direction so the sprite points in the direction of travel:

• Travelling right (direction.x >= 0): atan2(direction.y, direction.x)
• Travelling left: -atan2(direction.y, -direction.x)