/*
* $Id: LineSegment.java 4784 2011-03-15 08:33:00Z blowagie $
*
* This file is part of the iText (R) project.
* Copyright (c) 1998-2011 1T3XT BVBA
* Authors: Bruno Lowagie, Kevin Day, et al.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License version 3
* as published by the Free Software Foundation with the addition of the
* following permission added to Section 15 as permitted in Section 7(a):
* FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
* 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE.
* See the GNU Affero General Public License for more details.
* You should have received a copy of the GNU Affero General Public License
* along with this program; if not, see http://www.gnu.org/licenses or write to
* the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
* Boston, MA, 02110-1301 USA, or download the license from the following URL:
* http://itextpdf.com/terms-of-use/
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License.
*
* In accordance with Section 7(b) of the GNU Affero General Public License,
* a covered work must retain the producer line in every PDF that is created
* or manipulated using iText.
*
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the iText software without
* disclosing the source code of your own applications.
* These activities include: offering paid services to customers as an ASP,
* serving PDFs on the fly in a web application, shipping iText with a closed
* source product.
*
* For more information, please contact iText Software Corp. at this
* address: [email protected]
*/
package com.itextpdf.text.pdf.parser;
import java.awt.geom.Rectangle2D;
/**
* Represents a line segment in a particular coordinate system. This class is immutable.
* @since 5.0.2
*/
public class LineSegment {
/** Start vector of the segment. */
private final Vector startPoint;
/** End vector of the segment. */
private final Vector endPoint;
/**
* Creates a new line segment.
* @param startPoint the start point of a line segment.
* @param endPoint the end point of a line segment.
*/
public LineSegment(Vector startPoint, Vector endPoint) {
this.startPoint = startPoint;
this.endPoint = endPoint;
}
/**
* @return the start point
*/
public Vector getStartPoint() {
return startPoint;
}
/**
* @return the end point
*/
public Vector getEndPoint() {
return endPoint;
}
/**
* @return the length of this line segment
* @since 5.0.2
*/
public float getLength(){
return endPoint.subtract(startPoint).length();
}
/**
* Computes the bounding rectangle for this line segment. The rectangle has a rotation 0 degrees
* with respect to the coordinate system that the line system is in. For example, if a line segment
* is 5 unit long and sits at a 37 degree angle from horizontal, the bounding rectangle will have
* origin of the lower left hand end point of the segment, with width = 4 and height = 3.
* @return the bounding rectangle
* @since 5.0.2
*/
public Rectangle2D.Float getBoundingRectange(){
float x1 = getStartPoint().get(Vector.I1);
float y1 = getStartPoint().get(Vector.I2);
float x2 = getEndPoint().get(Vector.I1);
float y2 = getEndPoint().get(Vector.I2);
return new Rectangle2D.Float(Math.min(x1, x2), Math.min(y1, y2), Math.abs(x2-x1), Math.abs(y2-y1));
}
/**
* Transforms the segment by the specified matrix
* @param m the matrix for the transformation
* @return the transformed segment
*/
public LineSegment transformBy(Matrix m){
Vector newStart = startPoint.cross(m);
Vector newEnd = endPoint.cross(m);
return new LineSegment(newStart, newEnd);
}
}
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