using?System;
using?System.Collections.Generic;
using?System.ComponentModel;
using?System.Data;
using?System.Drawing;
using?System.Linq;
using?System.Text;
using?System.Threading.Tasks;
using?System.Windows.Forms;

namespace?空間分析
{
????public?partial?class?DrawArea?:?Form
????{
????????public?DrawArea（）
????????{
????????????StartPosition?=?FormStartPosition.CenterScreen;
????????????InitializeComponent（）;
????????}
????????private?List?point;
????????private?bool?Dr?=?false;
????????private?Graphics?g;
????????Pen?pen;
????????bool?judge?=?false;
????????private?static?DrawArea?_instance?=?null;
????????private?void?DrawBtn_Click（object?sender?EventArgs?e）
????????{
???????????
????????????Dr?=?true;
????????????point?=?new?List（）;
????????????if?（Dr）
????????????{
????????????????label3.Text?=?“可以進行繪圖“;
????????????
????????????}
????????}

????????private?void?DrawArea_Load（object?sender?EventArgs?e）
????????{
???????????
????????????pen?=?new?Pen（Color.Blue?2）;
????????????if?（!Dr）?{

????????????????label3.Text?=?“不可繪圖“;
????????????}
????????}
????????public?static?DrawArea?GetInstance（）
????????{
????????????if?（_instance?==?null?||?_instance.IsDisposed）
????????????{
????????????????_instance?=?new?DrawArea（）;
????????????????return?_instance;

????????????}

????????????return?_instance;

????????}

????????private?void?pictureBox1_Paint（object?sender?PaintEventArgs?e）
????????{
????????????g?=?this.pictureBox1.CreateGraphics（）;???
????????}

????????private?void?pictureBox1_MouseDown（object?sender?MouseEventArgs?e）
????????{

????????????Point?p;

????????????if?（Dr）
????????????{

????????????????p?=?new?Point（）;
????????????????p.X?=?e.X;
????????????????p.Y?=?e.Y;
????????????????point.Add（p）;
????????????????if?（point.Count?>?1）
????????????????{
????????????????????g.DrawLine（pen?point[point.Count?-?2]?p）;

????????????????}

????????????????

????????????}
????????????if?（judge）
????????????{
????????????????List?angle?=?new?List（）;
????????????????Point?pS?=?new?Point（）;
????????????????Point?pE?=?new?Point（）;
????????????????double?sin?cos;
????????????????for?（int?i?=?0;?i?????????????????{
????????????????????pS.X?=?point[i].X?-?e.X;
????????????????????pS.Y?=?point[i].Y?-?e.Y;
????????????????????pE.X?=?point[i+1].X?-?e.X;
????????????????????pE.Y?=?point[i+1].Y?-?e.Y;
????????????????????sin?=?pS.X?*?pE.Y?-?pS.Y?*?pE.X;//網上找的
????????????????????cos?=?pS.X?*?pE.X?+?pS.Y?*?pE.Y;//


????????????????????angle.Add（Math.Atan2（sincos）*（180/Math.PI））;




????????????????}
????????????????double?result?=?Math.Abs（angle.Sum（））;
????????????????if?（Math.Abs（angle.Sum（）-360）<0.01）
????????????????{
????????????????????MessageBox.Show（“點在多邊形內部“）;
????????????????}
????????????????else
????????????????{
????????????????????MessageBox.Show（“點在多邊形外部“）;
????????????

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件????????187??2015-09-18?11:51??空間分析\空間分析\App.config

?????文件???????5466??2015-09-19?13:37??空間分析\空間分析\Area.cs

?????文件??????13225??2015-09-18?16:05??空間分析\空間分析\Area.Designer.cs

?????文件???????5817??2015-09-18?16:05??空間分析\空間分析\Area.resx

?????文件??????54272??2015-10-25?12:07??空間分析\空間分析\bin\Debug\空間分析.exe

?????文件????????187??2015-09-18?11:51??空間分析\空間分析\bin\Debug\空間分析.exe.config

?????文件?????124416??2015-10-25?12:07??空間分析\空間分析\bin\Debug\空間分析.pdb

?????文件??????22984??2015-10-25?12:09??空間分析\空間分析\bin\Debug\空間分析.vshost.exe

?????文件????????187??2015-09-18?11:51??空間分析\空間分析\bin\Debug\空間分析.vshost.exe.config

?????文件????????490??2014-01-13?21:31??空間分析\空間分析\bin\Debug\空間分析.vshost.exe.manifest

?????文件??????30100??2015-10-25?12:11??空間分析\空間分析\DemArea.cs

?????文件???????9214??2015-10-25?12:11??空間分析\空間分析\DemArea.Designer.cs

?????文件???????5817??2015-09-19?15:13??空間分析\空間分析\DemArea.resx

?????文件???????1374??2015-09-19?08:39??空間分析\空間分析\Form1.cs

?????文件???????4644??2015-09-19?08:39??空間分析\空間分析\Form1.Designer.cs

?????文件???????5817??2015-09-19?08:39??空間分析\空間分析\Form1.resx

?????文件???????4084??2015-09-19?13:40??空間分析\空間分析\Globe.cs

?????文件??????15500??2015-09-19?13:32??空間分析\空間分析\Globe.Designer.cs

?????文件???????5817??2015-09-19?13:32??空間分析\空間分析\Globe.resx

?????文件???????6485??2015-09-19?08:36??空間分析\空間分析\Length.cs

?????文件???????8619??2015-09-19?08:34??空間分析\空間分析\Length.Designer.cs

?????文件???????5817??2015-09-19?08:34??空間分析\空間分析\Length.resx

?????文件???????1308??2015-09-18?11:59??空間分析\空間分析\obj\Debug\DesignTimeResolveAssemblyReferences.cache

?????文件???????7031??2015-10-25?11:39??空間分析\空間分析\obj\Debug\DesignTimeResolveAssemblyReferencesInput.cache

?????文件??????????0??2015-09-18?11:51??空間分析\空間分析\obj\Debug\TemporaryGeneratedFile_036C0B5B-1481-4323-8D20-8F5ADCB23D92.cs

?????文件??????????0??2015-09-18?11:51??空間分析\空間分析\obj\Debug\TemporaryGeneratedFile_5937a670-0e60-4077-877b-f7221da3dda1.cs

?????文件??????????0??2015-09-18?11:51??空間分析\空間分析\obj\Debug\TemporaryGeneratedFile_E7A71F73-0F8D-4B9B-B56E-8E70B10BC5D3.cs

?????文件???????2844??2015-10-25?12:09??空間分析\空間分析\obj\Debug\空間分析.csproj.FileListAbsolute.txt

?????文件???????1332??2015-09-19?15:13??空間分析\空間分析\obj\Debug\空間分析.csproj.GenerateResource.Cache

?????文件???????2209??2015-09-19?12:42??空間分析\空間分析\obj\Debug\空間分析.csprojResolveAssemblyReference.cache

............此處省略37個文件信息