net.doo.snap.util.snap

Class PolygonHelper

net.doo.snap.util.snap.PolygonHelper

public class PolygonHelper

Helper to make it easier to draw polygon on view

Method Summary

Modifier and Type	Method and Description
static boolean	checkPolygonSize()
void	getDrawingPolygon() Processes original polygon with coordinates 0..1 to drawing polygon by multiplying them by view dimensions
void	getPolygonFromDrawingPolygon() Processes drawing polygon coordinates to polygon with coordinates 0..1 by dividing them by view dimensions
void	polygonToPoints() Calculates lines points from polygon multiplying 0..1 values by view dimensions and applying rotation matrix. Usually used on preview as it has camera rotation
java.util.List<net.doo.snap.lib.detector.Line2D>	scaleLines() Performs scaling from 0..1 values to image pixel values
void	setImageSize() Set scaled image size that will be drawn on screen
void	setLayout() Sets layout of surface inside parent to compensate differences between viewport and preview sizes and draw polygon correctly
void	setRotation() Set rotation in degrees for polygon

Method Detail

checkPolygonSize

public static boolean checkPolygonSize()

Returns:

true if polygon edges sizes less than PolygonHelper#MIN_EDGE_LENGTH_PX, false - otherwise

setRotation

public void setRotation()

Set rotation in degrees for polygon

setImageSize

public void setImageSize()

Set scaled image size that will be drawn on screen

setLayout

public void setLayout()

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

polygonToPoints

public void polygonToPoints()

Calculates lines points from polygon multiplying 0..1 values by view dimensions and applying rotation matrix. Usually used on preview as it has camera rotation

getDrawingPolygon

public void getDrawingPolygon()

Processes original polygon with coordinates 0..1 to drawing polygon by multiplying them by view dimensions

getPolygonFromDrawingPolygon

public void getPolygonFromDrawingPolygon()

Processes drawing polygon coordinates to polygon with coordinates 0..1 by dividing them by view dimensions

scaleLines

public java.util.List<net.doo.snap.lib.detector.Line2D> scaleLines()

Performs scaling from 0..1 values to image pixel values