Point in poly line

[Anonymous]

Hello

I am trying to do this

                boolean checkPoly = true;
                    Point2D[] points = new Point2D[areaArray.size()];

                    for ( int i = 0; i < areaArray.size(); i ++)
                    {
                        AreaMarkClass areaMark = areaArray.get(i);
                        double a = Double.valueOf(areaMark.getLatitude());
                        double b = Double.valueOf(areaMark.getLatitude());
                        Point2D point = new Point2D(a,b);
                        points[i] = point;
                    }

                    Polygon2D polygon2d = new Polygon2D();
                    double a = p.getLatitudeE6();
                    double b = p.getLongitudeE6();
                    Point2D point = new Point2D(a,b);
                    polygon2d.addVertex(point);
                    checkPoly = polygon2d.contains(point);

The problem that I am facing is ,  whatever i do ,
Polygon2D polygon2d = new Polygon2D(doublex, doubley);
Polygon2D polygon2d = new Polygon2D(Point2d);
Polygon2D polygon2d = new Polygon2D();

It just says Cannot instantiate the type Polygon2D.. How can i initialize this Polygon2D

[David]

Hi,

The type Polygon2D is an interface, and can therefore not be instantiated.
You can use "SimplePolygon2D", that implements the Polygon2D interface. This should do the job!

Hope this helps,
David

[Anonymous]

thats cool it worked, tho i have one more question , I tried finding Polygon2DUtil, but Its not in javaGeom 0.11.1 . Which lib got this class?

[David]

Hi,

the class has been renamed in "Polygons2D" (to have naming conventions similar to the java Collection package).
You can find  API for this class here:
http://geom-java.sourceforge.net/api/math/geom2d/polygon/Polygons2D.html

tell me if you encounter any other problems!
regards,

David

[Anonymous]

Yes, thanks david you were really helpful. However I am facing a new problem and I can't figure to fix this

AreaMarkClass areaMark = areaArray.get(i);
                        double a = Double.valueOf(areaMark.getLatitude());
                        double b = Double.valueOf(areaMark.getLongitude());
                        Point2D point = new Point2D(a,b);
                        points[i] = point;

this is my code
my double a and b values are lets say 4.1036, 5.0231 however Point2D point = new Point2D(a,b); giving error

Could not find class 'java.awt.geom.Point2D$Float', referenced from method math.geom2d.Point2D.getAsFloat

Am I missing something important?

[David]

Hi,

this is a strange bug, as the method math.geom2d.Point2D.getAsFloat() is not used in the constructor of Point2D.

The way you are constructing new instance Point2D is the right way.

Some questions:
* have you checked there is no conflict in your imports between math.geom2d.Point2D and java.geom.Point2D ?
* Do you develop for the android platform ? I am not sure about the compatibility of javaGeom for android. I have removed inheritance of Point2D to java classes, but maybe some compilers requires the java awt part to be in the path ?

I'm sorry to say that I can't help more…