Michael Bayne
8e69ff612e
git-svn-id: svn+ssh://src.earth.threerings.net/nenya/trunk@662 ed5b42cb-e716-0410-a449-f6a68f950b19
122 lines
3.4 KiB
Java
122 lines
3.4 KiB
Java
//
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// $Id$
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//
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// Nenya library - tools for developing networked games
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// Copyright (C) 2002-2007 Three Rings Design, Inc., All Rights Reserved
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// http://www.threerings.net/code/nenya/
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//
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// This library is free software; you can redistribute it and/or modify it
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// under the terms of the GNU Lesser General Public License as published
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// by the Free Software Foundation; either version 2.1 of the License, or
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// (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package com.threerings.media.animation;
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import java.awt.Graphics2D;
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import java.awt.Rectangle;
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import com.samskivert.util.RandomUtil;
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import com.threerings.media.image.Mirage;
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/**
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* An animation that bobbles an image around within a specific horizontal
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* and vertical pixel range for a given period of time.
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*/
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public class BobbleAnimation extends Animation
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{
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/**
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* Constructs a bobble animation.
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*
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* @param image the image to animate.
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* @param sx the starting x-position.
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* @param sy the starting y-position.
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* @param rx the horizontal bobble range.
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* @param ry the vertical bobble range.
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* @param duration the time to animate in milliseconds.
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*/
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public BobbleAnimation (
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Mirage image, int sx, int sy, int rx, int ry, int duration)
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{
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super(new Rectangle(sx - rx, sy - ry, image.getWidth() + rx,
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image.getHeight() + ry));
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// save things off
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_image = image;
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_sx = sx;
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_sy = sy;
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_rx = rx;
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_ry = ry;
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// calculate animation ending time
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_duration = duration;
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}
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@Override
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public void tick (long tickStamp)
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{
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// grab our ending time on our first tick
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if (_end == 0L) {
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_end = tickStamp + _duration;
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}
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_finished = (tickStamp >= _end);
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invalidate();
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// calculate the latest position
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int dx = RandomUtil.getInt(_rx);
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int dy = RandomUtil.getInt(_ry);
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_x = _sx + dx * ((RandomUtil.getInt(2) == 0) ? -1 : 1);
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_y = _sy + dy * ((RandomUtil.getInt(2) == 0) ? -1 : 1);
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}
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@Override
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public void fastForward (long timeDelta)
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{
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_end += timeDelta;
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}
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@Override
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public void paint (Graphics2D gfx)
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{
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_image.paint(gfx, _x, _y);
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}
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@Override
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protected void toString (StringBuilder buf)
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{
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super.toString(buf);
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buf.append(", x=").append(_x);
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buf.append(", y=").append(_y);
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buf.append(", rx=").append(_rx);
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buf.append(", ry=").append(_ry);
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buf.append(", sx=").append(_sx);
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buf.append(", sy=").append(_sy);
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}
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/** The current position of the image. */
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protected int _x, _y;
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/** The horizontal and vertical bobbling range. */
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protected int _rx, _ry;
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/** The starting position. */
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protected int _sx, _sy;
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/** The image to animate. */
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protected Mirage _image;
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/** Animation ending timing information. */
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protected long _duration, _end;
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}
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