MotionBlurEffect class

Directional motion blur driven by camera velocity.

Wraps the world render in a saveLayer with a directional ui.ImageFilter.blur oriented along the camera's movement direction.

final blur = MotionBlurEffect(velocityFn: () => camera.velocity);
camera.effectManager.addEffect(blur);

The effect is permanent (never auto-removed). Call CameraEffectManager.removeEffect to stop it.

Inheritance

Constructors

MotionBlurEffect({required Offset velocityFn(), double minSpeed = 150.0, double maxBlurSigma = 6.0, double maxSpeed = 800.0}): Create a MotionBlurEffect.

hashCode → int: The hash code for this object.
no setterinherited
isComplete → bool: When true the CameraEffectManager removes this effect automatically.
no setteroverride
maxBlurSigma → double: Maximum blur sigma (pixels) achieved at maxSpeed.
final
maxSpeed → double: Speed that maps to maxBlurSigma.
final
minSpeed → double: Minimum speed (world px/s) before any blur is applied.
final
runtimeType → Type: A representation of the runtime type of the object.
no setterinherited
velocityFn → Offset Function(): Returns the camera's current world-space velocity (pixels/s).
final

noSuchMethod(Invocation invocation) → dynamic: Invoked when a nonexistent method or property is accessed.
inherited
postRender(Canvas canvas, Size size) → void: Called after canvas.restore(), in reverse order of preRender calls.
override
preRender(Canvas canvas, Size size) → void: Called before the world canvas.save() + camera transform.
override
render(Canvas canvas, Size size) → void: Called after all post-process passes for pure screen-space overlays (e.g. fade-to-black, letterbox bars).
inherited
toString() → String: A string representation of this object.
inherited
update(double dt) → void: Update internal state once per frame.
inherited