c＃中的圆角显示 [英] circle angle display in c#

问题描述

我有一个crcle有line.i想要这样做，如果我们在txt框（0-360）输入numaric值。 line移动到该角度输入文本框。

问题是如何在c＃代码中移动圆圈线以显示0-360度之间的角度。

解决方案

所以此时你有代码确保你的度数值保持在0到360之间。圆圈的绘图代码在哪里？决定圆上位置的计算是一个简单的参数方程。

如何计算圆周上的圆点 [ ^ ]

圆圈方程式 [ ^ ]

http://go4answers.webhost4life.com/Example/circle-center-angle-points-circle-167588.aspx [ ^ ]

  public  Texture2D CreateCircle（ int  radius）
 {
  int  outerRadius = radius * 2 +  2 ;  //  因此圆圈不会越界 
 Texture2D texture =  new  Texture2D（GraphicsDevice，outerRadius，outerRadius）; 
 
颜色[] data =  new 颜色[outerRadius * outerRadius]; 
 
  //  首先将整个纹理着色透明。 
 < span class =code-keyword> for （ int  i =  0 ; i < span class =code-keyword><  data.Length; i ++）
 data [i] = Color.Transparent; 
 
  //  使用三角函数+正弦近似计算出必要的最小步骤。 
  double  angleStep = 1f / radius; 
 
  for （ double  angle =  0 ; angle <  Math.PI * 2; angle + = angleStep）
 {
  //  使用圆的参数化定义：http：//en.wikipedia.org/wiki/  
  int  x =（ int ）Math.Round（radius + radius * Math.Cos（angle））; 
  int  y =（ int ）Math.Round（radius + radius * Math.Sin（角度））; 
 
 data [y * outerRadius + x +  1 ] = Color.White; 
} 
 
 texture.SetData（data）; 
 返回纹理; 
} 

 使用系统; 
 使用 System.Collections.Generic; 
 使用 System.ComponentModel; 
 使用 System.Data; 
 使用 System.Drawing; 
 使用 System.Linq; 
 使用 System.Text; 
 使用 System.Windows.Forms; 
 使用 System.Timers（）; 
 
 
 命名空间 WindowsForms 
 {
  public   partial   class  Form1：Form 
 {
  int  circleDiameter; 
  public  Form1（）
 {
 InitializeComponent（）; 
 circleDiameter =  100 ; 
} 
 
 
 私有  void  Form1_Paint（< span class =code-keyword> object  sender，PaintEventArgs e）
 {
 Point CenterPoint =  new  Point（）
 {
 X = 此 .ClientRectangle.Width /  2 ，
 Y = 此 .ClientRectangle.Height /  2  
}; 
 Point topLeft =  new  Point（）
 {
 
 
 X =（ this  .ClientRectangle.Width  -  circleDiameter）/  2 ，
 Y =（ this  .ClientRectangle.Height  -  circleDiameter）/  2  
 
 
}; 
 
 
 Point topRight =  new  Point（）
 {
 X =（ this  .ClientRectangle.Width + circleDiameter）/  2 ，
 Y =（ this  .ClientRectangle.Height  -  circleDiameter）/  2  
}; 
 Point bottomLeft =  new  Point（）
 {
 X =（ this  .ClientRectangle.Width  -  circleDiameter）/  2 ，
 Y =（ this  .ClientRectangle .Height + circleDiameter）/  2  
}; 
 Point bottomRight =  new  Point（）
 {
 X =（ this  .ClientRectangle.Width + circleDiameter）/  2 ，
 Y =（ this  .ClientRectangle .Height + circleDiameter）/  2  
}; 
 
 e.Graphics.DrawEllipse（Pens.Red，topLeft.X，topLeft.Y，circleDiameter，circleDiameter）; 
 
 e.Graphics.DrawLine（Pens.Red，CenterPoint，topLeft）; 
 
  //   e.Graphics.DrawLine（Pens.Black，CenterPoint，topRight）;  
 
  //   e.Graphics.DrawLine（Pens.Brown，CenterPoint，bottomLeft ）;  
 
  //   e.Graphics.DrawLine（Pens.Orange， CenterPoint，bottomRight）;  
} 
 
  private   void  timer1_Tick（< span class =code-keyword> object  sender，EventArgs e）
 {
 
} 
 
} 
} 

i have a crcle having line.i want to do that if we enter numaric value in txt box (0-360). line move to that angle enter in textbox.
issue is how to move circle line in c# code to show angle between 0-360 degree.

解决方案

So at this point you have code that ensures your degrees value remains between 0 and 360. Where is your drawing code for the circle? The calculation for deciding where on a circle is a simple parametric equation.
how-do-i-calculate-a-point-on-a-circles-circumference[^]
Circle Equations[^]

http://go4answers.webhost4life.com/Example/circle-center-angle-points-circle-167588.aspx[^]

public Texture2D CreateCircle(int radius)
{
    int outerRadius = radius*2 + 2; // So circle doesn't go out of bounds
    Texture2D texture = new Texture2D(GraphicsDevice, outerRadius, outerRadius);

    Color[] data = new Color[outerRadius * outerRadius];

    // Colour the entire texture transparent first.
    for (int i = 0; i < data.Length; i++)
        data[i] = Color.Transparent;

    // Work out the minimum step necessary using trigonometry + sine approximation.
    double angleStep = 1f/radius;

    for (double angle = 0; angle < Math.PI*2; angle += angleStep)
    {
        // Use the parametric definition of a circle: http://en.wikipedia.org/wiki/
        int x = (int)Math.Round(radius + radius * Math.Cos(angle));
        int y = (int)Math.Round(radius + radius * Math.Sin(angle));

        data[y * outerRadius + x + 1] = Color.White;
    }

    texture.SetData(data);
    return texture;
}

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Timers();


namespace WindowsForms
{
    public partial class Form1 : Form
    {
        int circleDiameter;
              public Form1()
        {
            InitializeComponent();
            circleDiameter = 100;
        }
        

        private void Form1_Paint(object sender, PaintEventArgs e)
        {
            Point CenterPoint = new Point()
            {
                X = this.ClientRectangle.Width / 2,
                Y = this.ClientRectangle.Height / 2
            };
            Point topLeft = new Point()
            {
              

                X = (this.ClientRectangle.Width - circleDiameter) / 2,
                Y = (this.ClientRectangle.Height - circleDiameter) / 2
              
    
        };


            Point topRight = new Point()
            {
                X = (this.ClientRectangle.Width + circleDiameter) / 2,
                Y = (this.ClientRectangle.Height - circleDiameter) / 2
            };
            Point bottomLeft = new Point()
            {
                X = (this.ClientRectangle.Width - circleDiameter) / 2,
                Y = (this.ClientRectangle.Height + circleDiameter) / 2
            };
            Point bottomRight = new Point()
            {
                X = (this.ClientRectangle.Width + circleDiameter) / 2,
                Y = (this.ClientRectangle.Height + circleDiameter) / 2
            };

            e.Graphics.DrawEllipse(Pens.Red, topLeft.X, topLeft.Y, circleDiameter, circleDiameter);
           
           e.Graphics.DrawLine(Pens.Red, CenterPoint, topLeft);
         
         //  e.Graphics.DrawLine(Pens.Black, CenterPoint, topRight);
        
       //     e.Graphics.DrawLine(Pens.Brown, CenterPoint, bottomLeft);
            
         //   e.Graphics.DrawLine(Pens.Orange, CenterPoint, bottomRight); 
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            
        }

    }
}

这篇关于c＃中的圆角显示的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！