保持更长时间会跳得更高（C# winforms）

Posted 2023-02-15

【中文标题】保持更长时间会跳得更高（C# winforms）

【英文标题】：hold longer will jump higher (C# winforms)

【发布时间】：2022-01-10 13:30:14

【问题描述】：

我正在尝试在 winforms 中制作 2D 游戏。我希望我的角色能够进行二段跳，如果我长时间按住空格键（跳跃）我会跳得更高，或者如果我按住空格键（跳跃）少我会跳得更低（请注意，虽然按住更长的时间会跳得更高，但只能达到固定水平，而不是无限）。但我只能二段跳，只能跳1个固定距离，不能保持空间更长跳得更高或保持空间更短跳得更低，有人帮助我，下面是我的代码。

public partial class GamePlay_Page : Form

bool goRight, goLeft;
int gravity = 16;
int force;
bool jump;
int jumpTimes = 2;
public GamePlay_Page()

    InitializeComponent();

private void GamePlay_Page_KeyDown(object sender, KeyEventArgs e)

    if (e.KeyCode == Keys.D)
    
        goRight = true;
        Trex.Image = Properties.Resources.running;
    
    if (e.KeyCode == Keys.A)
    
        goLeft = true;
        Trex.Image = Properties.Resources.running2;
    
    if (e.KeyCode == Keys.W && jumpTimes > 0)
    
        jump = true;
        force = gravity;
        jumpTimes -= 1;

    
    private void gameT(object sender, EventArgs e)
    
        if (goRight == true && Trex.Right < 600)
        
            Trex.Left += 5;
        
        if (goLeft == true && Trex.Left > 10)
        
            Trex.Left -= 5;
        

        if (jump == true)
        
            Trex.Top -= force;
            force -= 1;
        
        if (Trex.Top + Trex.Height >= backgroundAbove.Height)
        
            Trex.Top = backgroundAbove.Height - Trex.Height;
        
        else
        
            Trex.Top += 3;
        
        if (Trex.Top + Trex.Height == backgroundAbove.Height)
        
            jumpTimes = 2;
        
        private void GamePlay_Page_KeyUp(object sender, KeyEventArgs e)
        
            if (e.KeyCode == Keys.D)  goRight = false; 
            if (e.KeyCode == Keys.A)  goLeft = false; 
        

【问题讨论】：

欢迎来到 ***。我已经做出了回答。如果您不介意，您可以点击“✔”将我的回复标记为已接受的答案。它还将帮助其他人解决类似的问题。

【参考方案1】：

我不确定这是否是您的意思，并根据您的需要进行更改。

请看我的例子：

加一个stopwatch来判断按压时间的长短，防止力度爆表。

我设置的是按3s以上给定力，否则给重力初始力。

根据你的需要改变它。

你完全可以把它改成乘以时间的力。

 Stopwatch watch =new Stopwatch();
 watch.Start();//start the timer
 watch.Stop(); //stop the timer
 watch.ElapsedMilliseconds// Show duration in milliseconds（Type is long）
 watch.Reset();//reset the timer

将计时开始放入KeyDown事件：

if (e.KeyCode == Keys.W && jumpTimes > 0)
    
    //jump = true;
    //force = gravity;
    //jumpTimes -= 1;
    watch.Start();
    

把计时结束并触发跳转到KeyUp事件：

if (e.KeyCode == Keys.W && jumpTimes > 0)
    
    watch.Stop();
    jump = true;
    jumpTimes -= 1;
    if (watch.ElapsedMilliseconds > 300)//>3s
         
        force = 30;        
        
    else
        
        force = gravity;
        
    
watch.Reset();

所有代码：

using System;
using System.Diagnostics;
using System.Windows.Forms;

namespace GamePlay_Page 
    public partial class GamePlay_Page : Form 
        public GamePlay_Page () 
            InitializeComponent();
            
        bool goRight, goLeft;
        int gravity = 16;
        int force;
        bool jump;
        int jumpTimes = 2;
        Stopwatch watch =new Stopwatch();
        private void GamePlay_Page_Load (object sender, EventArgs e) 
            
        private void GamePlay_Page_KeyDown (object sender, KeyEventArgs e) 
            if (e.KeyCode == Keys.D)
                
                goRight = true;
                Trex.Image = Properties.Resources.ch;
                
            if (e.KeyCode == Keys.A)
                
                goLeft = true;
                Trex.Image = Properties.Resources.ca;
                
            if (e.KeyCode == Keys.W && jumpTimes > 0)
                
                //jump = true;
                //force = gravity;
                //jumpTimes -= 1;
                watch.Start();
                
            
        private void GamePlay_Page_KeyUp (object sender, KeyEventArgs e) 
            if (e.KeyCode == Keys.W && jumpTimes > 0)
                
                watch.Stop();
                if (e.KeyCode == Keys.W && jumpTimes > 0)
                    
                    watch.Stop();
                    jump = true;
                    jumpTimes -= 1;
                    if (watch.ElapsedMilliseconds > 300)//>3s
                        
                        force = 30;
                        
                    else
                        
                        force = gravity;
                        
                    
                
            watch.Reset();
            if (e.KeyCode == Keys.D)
                
                goRight = false;
                
            if (e.KeyCode == Keys.A)
                
                goLeft = false;
                
            
            
        private void Timer1_Tick (object sender, EventArgs e) 
            if (goRight == true && Trex.Right < 600)
                
                Trex.Left += 5;
                
            if (goLeft == true && Trex.Left > 10)
                
                Trex.Left -= 5;
                

            if (jump == true)
                
                Trex.Top -= force;
                force -= 1;
                
            if (Trex.Top + Trex.Height >= backgroundAbove.Height)
                
                Trex.Top = backgroundAbove.Height - Trex.Height;
                
            else
                
                Trex.Top += 3;
                
            if (Trex.Top + Trex.Height == backgroundAbove.Height)
                
                jumpTimes = 2;
                
            G.Text = gravity.ToString();
            F.Text = force.ToString();
            T.Text = Trex.Top.ToString();
            L.Text = Trex.Left.ToString();
            J.Text = jumpTimes.ToString();
            W.Text = watch.ElapsedMilliseconds.ToString();
            
        
    

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如果您对我的代码有任何疑问，请在下方评论，我会尽快跟进。