Returns the line fragments of the specified Shape. - Java java.lang

Java examples for java.lang:Math Geometry Line

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Description

Returns the line fragments of the specified Shape.

Demo Code


//package com.java2s;

import java.awt.Shape;

import java.awt.geom.FlatteningPathIterator;
import java.awt.geom.Line2D;

import java.awt.geom.PathIterator;
import java.awt.geom.Point2D;

import java.util.ArrayDeque;

import java.util.Deque;

public class Main {
    /**/*  w w w  .  jav a  2 s.  com*/
     * Returns the line fragments of the specified Shape.
     *
     * @param path    Shape to be divided.
     * @param swapped Invert segment direction.
     * @return Array of lines.
     */
    public static Line2D[] shapeToLines(Shape path, boolean swapped) {
        Deque<Line2D> lines = new ArrayDeque<Line2D>();
        PathIterator i = new FlatteningPathIterator(
                path.getPathIterator(null), 0.5);

        double[] coords = new double[6];
        double[] coordsPrev = new double[6];
        while (!i.isDone()) {
            int segment = i.currentSegment(coords);

            if (segment == PathIterator.SEG_LINETO
                    || segment == PathIterator.SEG_CLOSE) {
                Line2D line;
                if (!swapped) {
                    line = new Line2D.Double(coordsPrev[0], coordsPrev[1],
                            coords[0], coords[1]);
                    lines.addLast(line);
                } else {
                    line = new Line2D.Double(coords[0], coords[1],
                            coordsPrev[0], coordsPrev[1]);
                    lines.addFirst(line);
                }
            }
            if (segment == PathIterator.SEG_CLOSE && !lines.isEmpty()) {
                Point2D firstPoint = lines.getFirst().getP1();
                Point2D lastPoint = lines.getLast().getP2();
                if (!firstPoint.equals(lastPoint)) {
                    Line2D line;
                    if (!swapped) {
                        line = new Line2D.Double(coords[0], coords[1],
                                firstPoint.getX(), firstPoint.getY());
                        lines.addLast(line);
                    } else {
                        line = new Line2D.Double(firstPoint.getX(),
                                firstPoint.getY(), coords[0], coords[1]);
                        lines.addFirst(line);
                    }
                }
            }

            System.arraycopy(coords, 0, coordsPrev, 0, 6);
            i.next();
        }
        Line2D[] linesArray = new Line2D[lines.size()];
        lines.toArray(linesArray);
        return linesArray;
    }
}

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