Construct the vector specified by two points. - Android java.lang

Android examples for java.lang:Math Vector

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Description

Construct the vector specified by two points.

Demo Code

/*******************************************************************************
 * Copyright (c) 2011 MadRobot./*from ww  w . j a  va  2  s.  co m*/
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the GNU Lesser Public License v2.1
 * which accompanies this distribution, and is available at
 * http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 * 
 * Contributors:
 *  Elton Kent - initial API and implementation
 ******************************************************************************/
//package com.java2s;

import android.graphics.PointF;

public class Main {
    public static PointF createVector(float ax, float ay, float bx, float by) {
        PointF point = new PointF();
        point.x = bx - ax;
        point.y = by - ay;
        return point;
    }

    /**
     * Construct the vector specified by two points.
     * 
     * @param lineStart
     *            The coordinate of the line starting point
     * @param lineEnd
     *            The coordinate of the line ending point
     * 
     * @return The Vector point
     */
    public static PointF createVector(PointF lineStart, PointF lineEnd) {
        return createVector(lineStart.x, lineStart.y, lineEnd.x, lineEnd.y);
    }
}

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