绘制半口角
相信大家都在象棋中兵的位置和一些射击游戏里的准心都见过
，废话就少说了，看代码吧。
基类：
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
namespace GDI_Form
{
/// <summary>
/// 抽象基类
/// <para>Author：Evan Lee</para>
/// <para>QQ：278631309</para>
/// <para>Blog：http://www.cnblogs.com/magic_evan </para>
/// </summary>
public abstract class BaseControl
{
private Graphics _g;
private string _name;
private int _ID;
private object _Tag;
private bool _v;
private float _x;
private float _y;
private float _w;
private float _h;
/// <summary>
/// 获取设置GDI对象
/// </summary>
public Graphics G
{
get { return _g; }
set { _g = value; }
}
/// <summary>
/// 对象名称
/// </summary>
public string Name
{
get { return _name; }
set { _name = value; }
}
/// <summary>
/// 编号
/// </summary>
public int ID
{
get { return _ID; }
set { _ID = value; }
}
/// <summary>
/// 标签数据
/// </summary>
public object Tag
{
get { return _Tag; }
set { _Tag = value; }
}
/// <summary>
/// 对象是否可见
/// </summary>
public bool Visible
{
get { return _v; }
set { _v = value; }
}
/// <summary>
/// 起始X轴点
/// </summary>
public float X
{
get { return _x; }
set { _x = value; }
}
/// <summary>
/// 起始Y轴点
/// </summary>
public float Y
{
get { return _y; }
set { _y = value; }
}
/// <summary>
/// 宽度
/// </summary>
public float Width
{
get { return _w; }
set { _w = value; }
}
/// <summary>
/// 高度
/// </summary>
public float Heiht
{
get { return _h; }
set { _h = value; }
}
}
}
实现类：
using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
namespace GDI_Form
{
/// <summary>
/// 画边角类
/// <para>Author：Evan Lee</para>
///<para>QQ：278631309</para>
///<para>Blog：http://www.cnblogs.com/magic_evan </para>
/// </summary>
public class Angle : BaseControl
{
/// <summary>
/// 画边角类
/// </summary>
/// <param name="g"></param>
public Angle(Graphics g)
{
this.G = g;
}
/// <summary>
/// 角口的方向
/// ┏ ┓┗ ┛
/// </summary>
public enum AngleDirection
{
/// <summary>
/// 右上角┗
/// </summary>
UpperRight,
/// <summary>
/// 右下角┏
/// </summary>
LowerRight,
/// <summary>
/// 左下角┓
/// </summary>
LowerLeft,
/// <summary>
/// 左上角┛
/// </summary>
UpperLeft
}
/// <summary>
/// 绘制半口角
/// </summary>
/// <param name="pen">画笔</param>
/// <param name="centerP">中心坐标</param>
/// <param name="offsetP">偏移中心的坐标</param>
/// <param name="len">角的边长</param>
/// <param name="direction">角口的方向</param>
public void DrawAngle(Pen pen, Point centerP, Point offsetP, int len, AngleDirection direction)
{
if (this.G == null)
return;
switch (direction)
{
case AngleDirection.UpperRight:
this.G.DrawLine(pen, centerP.X + offsetP.X, centerP.Y - offsetP.Y, centerP.X + offsetP.X + len, centerP.Y - offsetP.Y);
this.G.DrawLine(pen, centerP.X + offsetP.X, centerP.Y - offsetP.Y, centerP.X + offsetP.X, centerP.Y - offsetP.Y - len);
break;
case AngleDirection.UpperLeft:
this.G.DrawLine(pen, centerP.X - offsetP.X, centerP.Y - offsetP.Y, centerP.X - offsetP.X - len, centerP.Y - offsetP.Y);
this.G.DrawLine(pen, centerP.X - offsetP.X, centerP.Y - offsetP.Y, centerP.X - offsetP.X, centerP.Y - offsetP.Y - len);
break;
case AngleDirection.LowerRight:
this.G.DrawLine(pen, centerP.X + offsetP.X, centerP.Y + offsetP.Y, centerP.X + offsetP.X + len, centerP.Y + offsetP.Y);
this.G.DrawLine(pen, centerP.X + offsetP.X, centerP.Y + offsetP.Y, centerP.X + offsetP.X, centerP.Y + offsetP.Y + len);
break;
case AngleDirection.LowerLeft:
this.G.DrawLine(pen, centerP.X - offsetP.X, centerP.Y + offsetP.Y, centerP.X - offsetP.X - len, centerP.Y + offsetP.Y);
this.G.DrawLine(pen, centerP.X - offsetP.X, centerP.Y + offsetP.Y, centerP.X - offsetP.X, centerP.Y + offsetP.Y + len);
break;
}
}
}
}
使用方法
private void test()
{
int centerX = this.Width / 2;
int centerY = this.Height / 2;
Point centerP = new Point(centerX, centerY);
Point offsetP = new Point(3, 3);
int len = 10;
Graphics g = this.CreateGraphics();
Pen pen = new Pen(Color.Red, 2);
Angle angle = new Angle(g);
angle.DrawAngle(pen, centerP, offsetP, len, Angle.AngleDirection.LowerLeft);
angle.DrawAngle(pen, centerP, offsetP, len, Angle.AngleDirection.LowerRight);
angle.DrawAngle(pen, centerP, offsetP, len, Angle.AngleDirection.UpperLeft);
angle.DrawAngle(pen, centerP, offsetP, len, Angle.AngleDirection.UpperRight);
}