Quad class
Four normalized corner points describing a document outline.
Corners are stored in a fixed order — topLeft, topRight, bottomRight, bottomLeft — which both native sides rely on when serializing over the channel and when applying the perspective transform.
Constructors
- Quad({required ScanPoint topLeft, required ScanPoint topRight, required ScanPoint bottomRight, required ScanPoint bottomLeft})
-
Creates a quad from four explicit corners.
const
-
Quad.fromList(List<
Object?> raw) -
Reconstructs a quad from a flat list of 8 doubles in corner order:
[tlX, tlY, trX, trY, brX, brY, blX, blY].factory - Quad.full()
-
A quad covering the entire frame (the sensible default when detection
fails and the user must adjust corners manually).
factory
Properties
- bottomLeft → ScanPoint
-
final
- bottomRight → ScanPoint
-
final
- clamped → Quad
-
Returns a copy with every corner clamped to the unit square.
no setter
-
corners
→ List<
ScanPoint> -
The four corners in serialization order.
no setter
- hashCode → int
-
The hash code for this object.
no setteroverride
- runtimeType → Type
-
A representation of the runtime type of the object.
no setterinherited
- topLeft → ScanPoint
-
final
- topRight → ScanPoint
-
final
Methods
-
copyWithCorner(
int index, ScanPoint point) → Quad - Replaces a single corner, identified by its index in corners (0 = TL, 1 = TR, 2 = BR, 3 = BL).
-
noSuchMethod(
Invocation invocation) → dynamic -
Invoked when a nonexistent method or property is accessed.
inherited
-
toList(
) → List< double> -
Flattens the quad to
[tlX, tlY, trX, trY, brX, brY, blX, blY]for the platform channel. -
toString(
) → String -
A string representation of this object.
override
Operators
-
operator ==(
Object other) → bool -
The equality operator.
override