Android Scanbot SDK API reference/io.scanbot.sdk.util.view/PolygonViewHelper

PolygonViewHelper

open class PolygonViewHelper

Helper to make it easier to draw polygon on view

Inheritors

EditPolygonViewHelper

Constructors

PolygonViewHelper

constructor()

Types

Edge

open class Edge

Represents edge of polygon with near and far points as well as intersecting lines from other edges pointA handle pointB O========[0]=========O | ^ edgeLine ^ | | | |lineA | lineB | | | | O====================O pointFarA pointFarB

Line

open class Line

Representation of line Calculates line by two points and finds intersection points with other lines General line formula is a * x + b * y + c = 0

Functions

checkPolygonSize

open fun checkPolygonSize(polygon: List<Point>): Boolean

getDrawingPolygon

open fun getDrawingPolygon(polygon: List<PointF>, drawingPolygon: List<PointF>)

Processes original polygon with coordinates 0..

getPolygonFromDrawingPolygon

open fun getPolygonFromDrawingPolygon(drawingPolygon: List<PointF>, polygon: List<PointF>)

Processes drawing polygon coordinates to polygon with coordinates 0..

polygonToLinePoints

open fun polygonToLinePoints(polygon: List<PointF>, points: Array<Float>)

Calculates lines points from polygon multiplying 0..1 values by view dimensions and applying rotation matrix.

polygonToPoints

open fun polygonToPoints(polygon: List<PointF>, points: Array<Float>)

Calculates points from polygon multiplying 0..1 values by view dimensions and applying rotation matrix.

setImageSize

open fun setImageSize(width: Int, height: Int)

Set scaled image size that will be drawn on screen

setLayout

open fun setLayout(left: Int, top: Int, right: Int, bottom: Int)

Sets layout of surface inside parent to compensate differences between viewport and preview sizes and draw polygon correctly

setRotation

open fun setRotation(degrees: Int)

Set rotation in degrees for polygon