C#画坐标系
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
using System.Drawing;
namespace 坐标1
{
class XYlinesFactory
{
#region 画出X轴与Y轴
///
/// 在任意的panel里画一个坐标,坐标所在的四边形距离panel边50像素
///
///
public void DrawXY(Panel pan)
{
Graphics g = pan.CreateGraphics();
//整体内缩move像素
float move = 50f;
float newX = pan.Width - move;
float newY = pan.Height - move;
//绘制X轴,
PointF px1 =new PointF(move, newY);
PointF px2 =new PointF(newX, newY);
g.DrawLine(new Pen(Brushes.Black, 2), px1, px2);
//绘制Y轴
PointF py1 =new PointF(move, move);
PointF py2 =new PointF(move, newY);
g.DrawLine(new Pen(Brushes.Black, 2), py1, py2);
}
#endregion
///
/// 画出Y轴上的分值线,从零开始
///
///
///
///
#region 画出Y轴上的分值线,从零开始
public void DrawYLine(Panel pan, float maxY, int len)
{
float move = 50f;
float LenX = pan.Width - 2 * move;
float LenY = pan.Height - 2 * move;
Graphics g = pan.CreateGraphics();
for (int i = 0; i <= len; i++) //len等份Y轴
{
PointF px1 =new PointF(move, LenY * i / len + move);
PointF px2 =new PointF(move + 4, LenY * i / len + move);
string sx = (maxY - maxY * i / len).ToString();
g.DrawLine(new Pen(Brushes.Black, 2), px1, px2);
StringFormat drawFormat =new StringFormat();
drawFormat.Alignment = StringAlignment.Far;
drawFormat.LineAlignment = StringAlignment.Center;
g.DrawString(sx,new Font("宋体", 8f), Brushes.Black, new PointF(move / 1.2f, LenY * i / len + move * 1.1f), drawFormat);
}
Pen pen =new Pen(Color.Black, 1);
g.DrawString("Y轴", new Font("宋体 ", 10f), Brushes.Black, new PointF(move / 3, move / 2f));
}
#endregion
///
/// 画出Y轴上的分值线,从任意值开始
///
///
///
///
///
#region 画出Y轴上的分值线,从任意值开始
public void DrawYLine(Panel pan, float minY, float maxY, int len)
{
float move = 50f;
float LenX = pan.Width - 2 * move;
float LenY = pan.Height - 2 * move;
Graphics g = pan.CreateGraphics();
for (int i = 0; i <= len; i++) //len等份Y轴
{
PointF px1 =new PointF(move, LenY * i / len + move);
PointF px2 =new PointF(move + 4, LenY * i / len + move);
string sx = (maxY - (maxY - minY) * i / len).ToString();
g.DrawLine(new Pen(Brushes.Black, 2), px1, px2);
StringFormat drawFormat =new StringFormat();
drawFormat.Alignment = StringAlignment.Far;
drawFormat.LineAlignment = StringAlignment.Center;
g.DrawString(sx,new Font("宋体", 8f), Brushes.Black, new PointF(move / 1.2f, LenY * i / len + move * 1.1f), drawFormat);
}
Pen pen =new Pen(Color.Black, 1);
g.DrawString("Y轴", new Font("宋体 ", 10f), Brushes.Black, new PointF(move / 3, move / 2f));
}
#endregion
///
/// 画出X轴上的分值线,从零开始
///
///
///
///
#region 画出X轴上的分值线,从零开始
public void DrawXLine(Panel pan, float maxX, int len)
{
float move = 50f;
float LenX = pan.Width - 2 * move;
float LenY = pan.Height - 2 * move;
Graphics g = pan.CreateGraphics();
for (int i = 1; i <= len; i++)
{
PointF py1 =new PointF(LenX * i / len + move, pan.Height - move - 4);
PointF py2 =new PointF(LenX * i / len + move, pan.Height - move);
string sy = (maxX * i / len).ToString();
g.DrawLine(new Pen(Brushes.Black, 2), py1, py2);
g.DrawString(sy,new Font("宋体", 8f), Brushes.Black, new PointF(LenX * i / len + move, pan.Height - move / 1.1f));
}
Pen pen =new Pen(Color.Black, 1);
g.DrawString("X轴", new Font("宋体 ", 10f), Brushes.Black, new PointF(pan.Width - move / 1.5f, pan.Height - move / 1.5f));
}
#endregion
#region 画出X轴上的分值线,从任意值开始
///
/// 画出X轴上的分值线,从任意值开始
///
///
///
///
///
public void DrawXLine(Panel pan, float minX, float maxX, int len)
{
float move = 50f;
float LenX = pan.Width - 2 * move;
float LenY = pan.Height - 2 * move;
Graphics g = pan.CreateGraphics();
for (int i = 0; i <= len; i++)
{
PointF py1 =new PointF(LenX * i / len + move, pan.Height - move - 4);
PointF py2 =new PointF(LenX * i / len + move, pan.Height - move);
string sy = ((maxX - minX) * i / len + minX).ToString();
g.DrawLine(new Pen(Brushes.Black, 2), py1, py2);
g.DrawString(sy,new Font("宋体", 8f), Brushes.Black, new PointF(LenX * i / len + move, pan.Height - move / 1.1f));
}
Pen pen =new Pen(Color.Black, 1);
g.DrawString("X轴", new Font("宋体 ", 10f), Brushes.Black, new PointF(pan.Width - move / 1.5f, pan.Height - move / 1.5f));
}
#endregion
}
}