java - 如何修复动画 (Java) 需要帮助 =]

Question

程序检测左箭头键和右箭头键。如果按下这些键中的任何一个，我的 Knight 对象(GImage 类的实例)将遍历字符串数组(这些字符串是 Knight 对象动画的目录路径。

我的代码的问题是我似乎无法用我想出的java代码找到合适的流体动画。当我按下箭头键时，动画快速循环然后减慢速度，但是当我抬起箭头键并再次按下时，动画仍然快速循环然后减慢速度。

每个 Action 动画有 4 帧动画。

这是我正在使用的库的引用 http://jtf.acm.org/javadoc/student/acm/graphics/GObject.html#pause%28double%29

如有任何提示，我们将不胜感激。

import java.awt.event.KeyEvent;

import acm.graphics.GImage;

import acm.program.GraphicsProgram;



public class Castlevania extends GraphicsProgram {



    public void init(){
        setGameBackground();
        knight = new Knight("knight anim/knightFaceLeft/knight1.png", 500, 500);
        add(knight);
        setSize(APPLICATION_WIDTH, APPLICATION_HEIGHT);
        addKeyListeners();


    }


    private void setGameBackground() {
        // TODO Auto-generated method stub
        gameBackgroundImage = new GImage("link sprites/zelda_background.png");
        add(gameBackgroundImage);
    }



    public void keyPressed(KeyEvent e){ 

        /* Knight's Movement
         * 
         */
        int knightMovementKey = e.getKeyCode();
        if(knightMovementKey == KeyEvent.VK_LEFT)
        {

            this.xSpeed = 10;
            ySpeed = 0;


            knight.setImage(KnightFaceLeft[knightFrame]);
            knight.move(-xSpeed, ySpeed);

            knightFrame ++; 

            if(knightFrame >= KnightFaceLeft.length)
            {
                knightFrame = 0;
            }


        }

        else if(knightMovementKey == KeyEvent.VK_RIGHT){

            knight.setImage(KnightFaceRight[knightFrame]);
            knight.move(xSpeed,ySpeed);
            knightFrame++;

            this.xSpeed = 10;
            ySpeed = 0;

            if(knightFrame>=KnightFaceRight.length){

                knightFrame = 0;
            }

        }
        knight.pause(DELAY);
    }

    private String[] KnightFaceLeft = {"knight anim/knightFaceLeft/knight1.png","knight anim/knightFaceLeft/knight2.png","knight anim/knightFaceLeft/knight3.png","knight anim/knightFaceLeft/knight4.png"}; //Add in as many images as you want for your animation
    private String[] KnightFaceRight = {"knight anim/knightFaceRight/knight1.png","knight anim/knightFaceRight/knight2.png","knight anim/knightFaceRight/knight3.png","knight anim/knightFaceRight/knight4.png"}; 
    private GImage gameBackgroundImage;
    private Knight knight;
    private final int APPLICATION_WIDTH = 1200;
    private final int APPLICATION_HEIGHT = 800;
    private int knightFrame = 0;
    private int xSpeed ; //the number of pixels to move in x
    private int ySpeed = 0; //0 so you only move horiontally
    private double DELAY = 35;
}

import acm.graphics.GImage.*;

public class Knight extends GImage {

                public Knight(String imageDirectory, double knight_Location_XCoord, double knight_Location_YCoord) {
                    super(imageDirectory,knight_Location_XCoord, knight_Location_YCoord);
                }
            }

Answer 1

您对 pause() 的调用正在阻止 event dispatch thread 。在此上下文中，使用 acm.util.SwingTimer 调整计时器的 ActionListener 中的动画速度。