is Same Direction - Java 2D Graphics

Java examples for 2D Graphics:Path

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Description

is Same Direction

Demo Code


import java.awt.geom.PathIterator;
import java.awt.geom.GeneralPath;
import java.awt.geom.Point2D;
import java.awt.geom.Line2D;
import java.awt.Point;

public class Main{
    public static boolean isSameDirection(GeneralPath p1, GeneralPath p2,
            double radAngleTollerance) {
        //FIX ME : Really not sure about this logic.
        //two paths are the same direction if the lines drawn from their
        //end points are in the same direction.
        //Remember that 360 and 1 are similar angles.

        final double tollerance = radAngleTollerance;

        double a1 = getAverageAngle(p1) + tollerance;
        double a2 = getAverageAngle(p2) + tollerance;
        a1 = a1 % (2 * Math.PI);/*w  w w.ja  va2s  .  c  om*/
        a2 = a2 % (2 * Math.PI);

        return (Math.abs(a1 - a2) < tollerance);
    }
    public static double getAverageAngle(GeneralPath path) {
        double seg[] = new double[6];
        PathIterator pi = path.getPathIterator(null);
        int segType = pi.currentSegment(seg);

        return GeoUtils.getAngle(seg[0], seg[1], path.getCurrentPoint()
                .getX(), path.getCurrentPoint().getY());
    }
}

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