?? runnersprite.java
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package com.croftsoft.apps.road; import com.croftsoft.core.animation.clock.Timekeeper; import com.croftsoft.core.animation.sprite.IconSprite; import java.applet.*; import java.awt.*; import java.awt.event.*; import java.awt.geom.*; import java.io.*; import java.net.URL; import java.util.*; import javax.swing.*; import javax.swing.event.*; /********************************************************************* * Roadrunner Sprite. * * @version * 2003-09-10 * @since * 2003-08-05 * @author * <a href="http://www.croftsoft.com/">David Wallace Croft</a> *********************************************************************/ public final class RunnerSprite extends IconSprite implements Constants ////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////// { private final Timekeeper timekeeper; // private Point mousePoint; ////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////// public RunnerSprite ( Icon runnerIcon, Timekeeper timekeeper, Component component ) ////////////////////////////////////////////////////////////////////// { super ( runnerIcon ); this.timekeeper = timekeeper; // initialize mouse input component.addMouseMotionListener ( new MouseMotionAdapter ( ) { public void mouseMoved ( MouseEvent mouseEvent ) { mousePoint = mouseEvent.getPoint ( ); } } ); component.addMouseListener ( new MouseAdapter ( ) { public void mouseExited ( MouseEvent mouseEvent ) { mousePoint = null; } } ); } ////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////// public void update ( JComponent component ) ////////////////////////////////////////////////////////////////////// { double timeDelta = timekeeper.getTimeDelta ( ); if ( mousePoint != null ) { double deltaX = mousePoint.x - x - TILE_SIZE / 2; double deltaY = mousePoint.y - y - TILE_SIZE / 2; if ( timeDelta > TIME_DELTA_MAX ) { timeDelta = TIME_DELTA_MAX; } double spaceDelta = timeDelta * RUNNER_VELOCITY; if ( deltaX > 0 ) { x = spaceDelta > deltaX ? x + deltaX : x + spaceDelta; } else if ( deltaX < 0 ) { x = spaceDelta > -deltaX ? x + deltaX : x - spaceDelta; } if ( deltaY > 0 ) { y = spaceDelta > deltaY ? y + deltaY : y + spaceDelta; } else if ( deltaY < 0 ) { y = spaceDelta > -deltaY ? y + deltaY : y - spaceDelta; } } } ////////////////////////////////////////////////////////////////////// ////////////////////////////////////////////////////////////////////// }?? 快捷鍵說明
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