Question

C#用GDI绘图，填充多个图形的交叉部分怎么实现？

最好有实现原理+代码

Answer 1

关键是要控制 坐标
这有代码
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Drawing.Drawing2D;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace DrawingPicture
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}

private void Form1_Load(object sender, EventArgs e)
{

}

private void panel1_Paint(object sender, PaintEventArgs e)
{

Graphics g = e.Graphics;
Pen p = new Pen(Color.Red, 5);
Pen p1 = new Pen(Color.Green, 5);
Pen p2 = new Pen(Color.Blue, 5);
p.EndCap = LineCap.ArrowAnchor;
g.DrawLine(p, 10, 10, 150, 100);
g.DrawLine(p, 10, 100, 150, 10);
g.DrawRectangle(p1, 10, 10, 150, 100);
g.DrawEllipse(p2, 10, 10, 150, 100);

HatchBrush s = new HatchBrush(HatchStyle.LargeCheckerBoard,Color.YellowGreen);
//SolidBrush s = new SolidBrush(Color.Pink);
//LinearGradientBrush l = new LinearGradientBrush(100,100,100,100,Color.Green,Color.Black);
//TextureBrush t = new TextureBrush(Image.FromFile("蝴蝶.jpg"));
Rectangle r=new Rectangle(150,10,150,150);
Rectangle r1 = new Rectangle(150,150,800,600);
g.DrawString("马发腾",new Font("微软雅黑",100),t,new Point(260,-5));
g.FillRectangle(s,r);
g.FillRectangle(t,r1);

}
}
}

追问

我要的不是填充单纯的一个图形，是多个图形的交叉部分，比如说填充两个椭圆相交部分

追答

取出相交的部分，再 填充就行了..

追问

关键是怎么取，画板上有很多图形，怎么取？有代码吗