draw Arrow - Java 2D Graphics

Java examples for 2D Graphics:Shape

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Description

draw Arrow

Demo Code

/*******************************************************************************
 * This file is part of logisim-evolution.
 *
 *   logisim-evolution is free software: you can redistribute it and/or modify
 *   it under the terms of the GNU General Public License as published by
 *   the Free Software Foundation, either version 3 of the License, or
 *   (at your option) any later version.
 *
 *   logisim-evolution 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 General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *   along with logisim-evolution.  If not, see <http://www.gnu.org/licenses/>.
 *
 *   Original code by Carl Burch (http://www.cburch.com), 2011.
 *   Subsequent modifications by :/*w ww .  j av a2s .  c o  m*/
 *     + Haute ?cole Sp?cialis?e Bernoise
 *       http://www.bfh.ch
 *     + Haute ?cole du paysage, d'ing?nierie et d'architecture de Gen?ve
 *       http://hepia.hesge.ch/
 *     + Haute ?cole d'Ing?nierie et de Gestion du Canton de Vaud
 *       http://www.heig-vd.ch/
 *   The project is currently maintained by :
 *     + REDS Institute - HEIG-VD
 *       Yverdon-les-Bains, Switzerland
 *       http://reds.heig-vd.ch
 *******************************************************************************/
//package com.java2s;

import java.awt.Graphics;

public class Main {
    static public void drawArrow(Graphics g, int x0, int y0, int x1,
            int y1, int headLength, int headAngle) {
        double offs = headAngle * Math.PI / 180.0;
        double angle = Math.atan2(y0 - y1, x0 - x1);
        int[] xs = { x1 + (int) (headLength * Math.cos(angle + offs)), x1,
                x1 + (int) (headLength * Math.cos(angle - offs)) };
        int[] ys = { y1 + (int) (headLength * Math.sin(angle + offs)), y1,
                y1 + (int) (headLength * Math.sin(angle - offs)) };
        g.drawLine(x0, y0, x1, y1);
        g.drawPolyline(xs, ys, 3);
    }
}

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