c# .net贝塞尔线，绘制速度更快

Question

我正在尝试使用。net框架在c#中做一个面板。我有一个面板，我在上面画一些线和点。我想用它来控制贝塞尔曲线。我得出了这样的结论:">

名称空间贝塞尔曲线{部分类FormMain: Form{新笔(颜色)。白色,3);新笔(颜色)黑色,2);钢笔lapiscontrol =新笔(颜色。红色,3);随机rnd;

private int frame = 40;
private int sele = 0, ct = 0;
private Point p1, p2, p3, p4, p5, p6, p7, p8, p9, p10;

public FormMain()
{
InitializeComponent();

}
private void PanelDraw_Paint(object sender, PaintEventArgs e)
{
desenhaBezier(e.Graphics);
}
/* protected virtual void OnLoad(EventArgs e)
{
gerarPontos();
}*/
private void FormMain_Load(object sender, EventArgs e)
{
gerarPontos();
}
private void desenhaBezier(Graphics g)
{
Point[] pontos = { p1, p2, p3, p4, p5, p6, p7, p8, p9, p10 };
g.Clear(PanelDraw.BackColor);
int w = PanelDraw.DisplayRectangle.Width;
int h = PanelDraw.DisplayRectangle.Height;
rnd = new Random();
g.DrawBeziers(lapisLinhas, pontos);
int r = 3;
for (int i = 0; i < pontos.Length; i++)
{
g.DrawEllipse(lapisPontos, pontos[i].X - r, pontos[i].Y - r, r * 2, r * 2);
}
g.DrawLine(lapisControlos, p1, p2);
g.DrawLine(lapisControlos, p3, p4);
g.DrawLine(lapisControlos, p5, p6);
g.DrawLine(lapisControlos, p7, p8);
g.DrawLine(lapisControlos, p9, p10);
}
private void gerarPontos()
{
int w = PanelDraw.DisplayRectangle.Width;
int h = PanelDraw.DisplayRectangle.Height;
StatusLabelScreen.Text = "Screen: (w: " + w + "|h: " + h + ")";
rnd = new Random();
p1 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p2 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p3 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p4 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p5 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p6 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p7 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p8 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p9 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p10 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
PanelDraw.Invalidate();
}
private void StatusLabelPosicao_Click(object sender, EventArgs e)
{
}
private void novosPontosToolStripMenuItem_Click(object sender, EventArgs e)
{
rnd = new Random();
int w = PanelDraw.DisplayRectangle.Width;
int h = PanelDraw.DisplayRectangle.Height;
StatusLabelScreen.Text = "Screen: (w: " + w + "| h: " + h + ")";
p1 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p2 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p3 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p4 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p5 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p6 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p7 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p8 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p9 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
p10 = new Point(rnd.Next(frame, w - frame), rnd.Next(frame, h - frame));
PanelDraw.Invalidate();
}
private void corDosPontosToolStripMenuItem_Click(object sender, EventArgs e)
{
if (colorDialog.ShowDialog() == DialogResult.OK)
{
Color pontosCor = colorDialog.Color;
lapisPontos.Color = pontosCor;
PanelDraw.Invalidate();
}
}
private void pontosToolStripMenuItem_Click(object sender, EventArgs e)
{
pontosToolStripMenuItem.Checked = !pontosToolStripMenuItem.Checked;

if (!pontosToolStripMenuItem.Checked)
{
Color trans = Color.Transparent;
lapisPontos = new Pen(trans);
}
else
{
lapisPontos = new Pen(Color.Red);
}
PanelDraw.Invalidate();
}
private void controlosToolStripMenuItem_Click(object sender, EventArgs e)
{
controlosToolStripMenuItem.Checked = !controlosToolStripMenuItem.Checked;
if (!controlosToolStripMenuItem.Checked)
{
Color trans = Color.Transparent;
lapisControlos = new Pen(trans);
}
else
{
lapisControlos = new Pen(Color.Black);
}
PanelDraw.Invalidate();
}
private void corDosControlosToolStripMenuItem_Click(object sender, EventArgs e)
{
if (colorDialog.ShowDialog() == DialogResult.OK)
{
Color controlosCor = colorDialog.Color;
lapisControlos.Color = controlosCor;
PanelDraw.Invalidate();
}
}
private void PanelDraw_MouseMove(object sender, MouseEventArgs e)
{
StatusLabelPosicao.Text = "Rato = (" + e.X + "|" + e.Y + ")";
if (sele == 1)
{
for (int i = 0; i < 10; i++)
{
if (ct - 1 == i)
{
switch (i)
{
case 0:
p1.X = e.X;
p1.Y = e.Y;
break;
case 1:
p2.X = e.X;
p2.Y = e.Y;
break;
case 2:
p3.X = e.X;
p3.Y = e.Y;
break;
case 3:
p4.X = e.X;
p4.Y = e.Y;
break;
case 4:
p5.X = e.X;
p5.Y = e.Y;
break;
case 5:
p6.X = e.X;
p6.Y = e.Y;
break;
case 6:
p7.X = e.X;
p7.Y = e.Y;
break;
case 7:
p8.X = e.X;
p8.Y = e.Y;
break;
case 8:
p9.X = e.X;
p9.Y = e.Y;
break;
case 9:
p10.X = e.X;
p10.Y = e.Y;
break;
}
}
}
PanelDraw.Invalidate();
}
}
private void sairToolStripMenuItem_Click(object sender, EventArgs e)
{
Application.Exit();
}
private void PanelDraw_Resize(object sender, EventArgs e)
{
int w = PanelDraw.DisplayRectangle.Width;
int h = PanelDraw.DisplayRectangle.Height;
StatusLabelScreen.Text = "Screen: (w: " + w + "| h: " + h + ")";
PanelDraw.Invalidate();
}
private void corDasLinhasToolStripMenuItem_Click(object sender, EventArgs e)
{
if (colorDialog.ShowDialog() == DialogResult.OK)
{
Color linhasCor = colorDialog.Color;
lapisLinhas.Color = linhasCor;
PanelDraw.Invalidate();
}
}
private void PanelDraw_click(object sender, MouseEventArgs e)
{
Point[] pontos = { p1, p2, p3, p4, p5, p6, p7, p8, p9, p10 };
if (sele == 1)
{
for (int i = 0; i < 10; i++)
{
if (ct - 1 == i)
{
switch (i)
{
case 0:
p1.X = e.X;
p1.Y = e.Y;
break;
case 1:
p2.X = e.X;
p2.Y = e.Y;
break;
case 2:
p3.X = e.X;
p3.Y = e.Y;
break;
case 3:
p4.X = e.X;
p4.Y = e.Y;
break;
case 4:
p5.X = e.X;
p5.Y = e.Y;
break;
case 5:
p6.X = e.X;
p6.Y = e.Y;
break;
case 6:
p7.X = e.X;
p7.Y = e.Y;
break;
case 7:
p8.X = e.X;
p8.Y = e.Y;
break;
case 8:
p9.X = e.X;
p9.Y = e.Y;
break;
case 9:
p10.X = e.X;
p10.Y = e.Y;
break;
}
PanelDraw.Update();
sele = 0;
}
}
}
else
{
ct = 0;
foreach (Point point in pontos)
{
ct++;
if (e.X >= point.X - 3 && e.X <= point.X + 3 && e.Y >= point.Y - 3 && e.Y <= point.Y + 3)
{
sele = 1;
return;
}
}
}
PanelDraw.Invalidate();
}
}

}">

有办法使线条画得更快吗?每次我移动鼠标，它们都会更新，这是我想要的。但他们只是一直在眨眼。我已经尝试了update()而不是validate，但是在单击后行更新，所以我不能正确地看到它。

有没有办法让它平稳过渡?

Answer 1

我用过这个，发现在其他帖子，它工作得很好:

typeof(Panel).InvokeMember("DoubleBuffered", BindingFlags.SetProperty
| BindingFlags.Instance | BindingFlags.NonPublic, null,
YourPanelName, new object[] { true });

文章:https://stackoverflow.com/a/31562892/16282563