1 | #Region "Microsoft.VisualBasic::70e707135b08f5cea088c478eeaea13c, Microsoft.VisualBasic.Core\Extensions\Image\Math\Models\Polygon.vb" |
2 | |
3 | ' Author: |
4 | ' |
5 | ' asuka (amethyst.asuka@gcmodeller.org) |
6 | ' xie (genetics@smrucc.org) |
7 | ' xieguigang (xie.guigang@live.com) |
8 | ' |
9 | ' Copyright (c) 2018 GPL3 Licensed |
10 | ' |
11 | ' |
12 | ' GNU GENERAL PUBLIC LICENSE (GPL3) |
13 | ' |
14 | ' |
15 | ' This program is free software: you can redistribute it and/or modify |
16 | ' it under the terms of the GNU General Public License as published by |
17 | ' the Free Software Foundation, either version 3 of the License, or |
18 | ' (at your option) any later version. |
19 | ' |
20 | ' This program is distributed in the hope that it will be useful, |
21 | ' but WITHOUT ANY WARRANTY; without even the implied warranty of |
22 | ' MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
23 | ' GNU General Public License for more details. |
24 | ' |
25 | ' You should have received a copy of the GNU General Public License |
26 | ' along with this program. If not, see <http://www.gnu.org/licenses/>. |
27 | |
28 | |
29 | |
30 | ' /********************************************************************************/ |
31 | |
32 | ' Summaries: |
33 | |
34 | ' Structure Polygon |
35 | ' |
36 | ' Properties: Length |
37 | ' |
38 | ' Constructor: (+3 Overloads) Sub New |
39 | ' Function: GetEnumerator, IEnumerable_GetEnumerator |
40 | ' |
41 | ' |
42 | ' /********************************************************************************/ |
43 | |
44 | #End Region |
45 | |
46 | Imports System.Drawing |
47 | Imports System.Runtime.CompilerServices |
48 | |
49 | Namespace Imaging.Math2D |
50 | |
51 | Public Structure Polygon : Implements IEnumerable(Of PointF) |
52 | |
53 | Dim Points As PointF() |
54 | |
55 | Public ReadOnly Property Length() As Integer |
56 | Get |
57 | Return Points.Length |
58 | End Get |
59 | End Property |
60 | |
61 | Default Public Property Item(index As Integer) As PointF |
62 | Get |
63 | Return Points(index) |
64 | End Get |
65 | Set |
66 | Points(index) = Value |
67 | End Set |
68 | End Property |
69 | |
70 | Public Sub New(points As PointF()) |
71 | Me.Points = points |
72 | End Sub |
73 | |
74 | <MethodImpl(MethodImplOptions.AggressiveInlining)> |
75 | Sub New(rect As Rectangle) |
76 | Call Me.New(New RectangleF(rect.Left, rect.Top, rect.Width, rect.Height)) |
77 | End Sub |
78 | |
79 | ''' <summary> |
80 | ''' |
81 | ''' </summary> |
82 | ''' <param name="rect"> |
83 | ''' 四个顶点是具有前后顺序的,按照顺序构建出一个四方形 |
84 | ''' </param> |
85 | Sub New(rect As RectangleF) |
86 | Call Me.New({ |
87 | New PointF(rect.Left, rect.Top), |
88 | New PointF(rect.Right, rect.Top), |
89 | New PointF(rect.Right, rect.Bottom), |
90 | New PointF(rect.Left, rect.Bottom) |
91 | }) |
92 | End Sub |
93 | |
94 | Public Shared Widening Operator CType(polygon As Polygon) As PointF() |
95 | Return polygon.Points |
96 | End Operator |
97 | |
98 | Public Shared Widening Operator CType(points As PointF()) As Polygon |
99 | Return New Polygon(points) |
100 | End Operator |
101 | |
102 | Private Function IEnumerable_GetEnumerator() As IEnumerator(Of PointF) Implements IEnumerable(Of PointF).GetEnumerator |
103 | Return DirectCast(Points.GetEnumerator(), IEnumerator(Of PointF)) |
104 | End Function |
105 | |
106 | Public Function GetEnumerator() As IEnumerator Implements IEnumerable.GetEnumerator |
107 | Return Points.GetEnumerator() |
108 | End Function |
109 | End Structure |
110 | End Namespace |