如何使用 WinForms c# 制作加速机制

Question

我正在尝试编写像this 这样的运动机制，但我该怎么做呢？如果我们按住Space键，游戏中的角色会像here一样移动。如果我们把手从钥匙上拿开，角色就会在重力的作用下倒下。我做了大约两个小时的研究，但这个网站是我最后的解决方法。

这是我的代码

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace c_sharp_form_test_2 {
    public partial class Form1 : Form {
        public Form1() {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e) {
            bitmap = new Bitmap(pictureBox1.Width, pictureBox1.Height);
            timer.Interval = 5;
            timer.Tick += new EventHandler(FormUpdate);
            timer.Start();
        }

        Timer timer = new Timer();

        Bitmap bitmap;
        Point center = new Point(100, 100);
        int radius = 40;
        int FigureSize = 10;

        Point end;
        float angle = -90;
        float angVel = 0;
        float angAcc = 0;

        bool isPressing = false;

        private void Form1_KeyDown(object sender, KeyEventArgs e) {
            if (e.KeyCode == Keys.Space) {
                isPressing = true;
                angle += 10;
            }
        }
        private void Form1_KeyUp(object sender, KeyEventArgs e) {
            angVel = 0;
            angAcc = 0;
            isPressing = false;
        }

        private void FormUpdate(object sender, EventArgs e) {
            end.X = (int)(radius * Math.Sin(angle / 57.2957795f)) +             center.X;// from degrees to radians
            end.Y = (int)(radius * Math.Cos(angle / 57.2957795f)) +     center.Y;// from degrees to radians

        Graphics g = Graphics.FromImage(bitmap);
        Pen bp = new Pen(Color.Black);
        SolidBrush b = new SolidBrush(Color.Black);

        g.Clear(Color.White);
        g.FillEllipse(b, end.X - FigureSize / 2, end.Y - FigureSize / 2, FigureSize, FigureSize);
        g.DrawLine(bp, center.X, center.Y, end.X, end.Y);
        pictureBox1.Image = bitmap;

        if (!isPressing) {
            angle += angVel;
            angVel += angAcc;
            angAcc = -0.15f * (float)Math.Sin(angle / 57.2957795f);
            angVel *= 0.985f;//dampening
            }
        }
    }
}

从现在开始感谢！

Answer 1

我无法添加评论的声誉原因， 所以

您可以查看这些文章和代码示例以找到通往光明的道路；

private void DrawIt()
        {
            System.Drawing.Graphics graphics = this.CreateGraphics();
            System.Drawing.Rectangle rectangle = new System.Drawing.Rectangle(
                50, 100, 150, 150);
            graphics.DrawEllipse(System.Drawing.Pens.Black, rectangle);
            graphics.DrawRectangle(System.Drawing.Pens.Red, rectangle);
        }

codeProjectLink

https://docs.microsoft.com/en-us/dotnet/desktop/winforms/advanced/how-to-draw-a-filled-ellipse-on-a-windows-form?view=netframeworkdesktop-4.8

Answer 2

在表单中，您需要双击 KeyUp 和 KeyDown 事件，并从工具箱中创建一个图片框。计时器就像更新一样，每秒都在做某事。我没有实现图形旋转，但你可以通过在端点周围使用正弦和余弦来做到这一点，每个角度都除以 57...因为所有的三角计算都是以弧度完成的，度数感觉更自然。

如果您打算构建一个相当大的游戏，那么您可能应该使用游戏引擎，因为在这些程序中使用输入、物理和绘图系统要简单得多。

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace TrynaHelppl
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
            bitmap = new Bitmap(pictureBox1.Width, pictureBox1.Height);
            timer.Interval = 5;
            timer.Tick += new EventHandler(FormUpdate);
            timer.Start();
        }

        Timer timer = new Timer();

        Bitmap bitmap;
        Point center = new Point(100, 100);
        int radius = 40;
        int FigureSize = 10;

        Point end;
        float angle = -90;
        float angVel = 0;
        float angAcc = 0;

        bool isPressing = false;

        private void Form1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Space)
            {
                isPressing = true;
                angle += 10;
            }
        }
        private void Form1_KeyUp(object sender, KeyEventArgs e)
        {
            angVel = 0;
            angAcc = 0;
            isPressing = false;
        }

        private void FormUpdate(object sender, EventArgs e)
        {
            end.X = (int)(radius * Math.Sin(angle / 57.2957795f)) + center.X;// from degrees to radians
            end.Y = (int)(radius * Math.Cos(angle / 57.2957795f)) + center.Y;// from degrees to radians

            Graphics g = Graphics.FromImage(bitmap);
            Pen bp = new Pen(Color.Black);
            SolidBrush b = new SolidBrush(Color.Black);

            g.Clear(Color.White);
            g.FillEllipse(b, end.X - FigureSize / 2, end.Y - FigureSize / 2, FigureSize, FigureSize);
            //g.DrawLine(bp, center.X, center.Y, end.X, end.Y);
            pictureBox1.Image = bitmap;

            if (!isPressing)
            {
                angle += angVel;
                angVel += angAcc;
                angAcc = -0.15f * (float)Math.Sin(angle / 57.2957795f);
                angVel *= 0.985f;//dampening
            }
        }
    }
}