| 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 |