ho trovato questo esempio:
Codice PHP:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Drawing.Drawing2D;
namespace Tutorial5
{
public partial class Form1 : Form
{
List<PointF> PointList = new List<PointF>();
int pointIndex = 0;
public Form1()
{
InitializeComponent();
}
private void Form1_Load(object sender, EventArgs e)
{
SetStyle(ControlStyles.UserPaint, true);
SetStyle(ControlStyles.AllPaintingInWmPaint, true);
SetStyle(ControlStyles.DoubleBuffer, true);
PointF[] pt = new PointF[] {
new PointF(100, 100),
new PointF(150, 150),
new PointF(200, 100),
new PointF(100, 100),
};
// Get Points From Line(s)
float curDist = 0;
float distance = 0;
for (int i = 0; i < pt.Length - 1; i++)
{
PointF ptA = pt[i];
PointF ptB = pt[i + 1];
float deltaX = ptB.X - ptA.X;
float deltaY = ptB.Y - ptA.Y;
curDist = 0;
distance = (float)Math.Sqrt(Math.Pow(deltaX, 2) + Math.Pow(deltaY, 2));
while (curDist < distance)
{
curDist++;
float offsetX = (float)((double)curDist / (double)distance * (double)deltaX);
float offsetY = (float)((double)curDist / (double)distance * (double)deltaY);
PointList.Add(new PointF(ptA.X + offsetX, ptA.Y + offsetY));
}
}
}
private void Form1_Paint(object sender, PaintEventArgs e)
{
e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
for (int i = 0; i < pointIndex; i++)
{
e.Graphics.DrawLine(Pens.Black, PointList[i].X, PointList[i].Y, PointList[i + 1].X, PointList[i + 1].Y);
}
}
private void timer1_Tick(object sender, EventArgs e)
{
if (pointIndex < PointList.Count - 1)
{
pointIndex++;
this.Refresh();
}
}
}
}