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#Region "Microsoft.VisualBasic::8e8be001cb1181a81589fdf10ea79183, Microsoft.VisualBasic.Core\Extensions\Image\Colors\ColorMap.vb"
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#End Region
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Imports System.Drawing
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Imports System.Math
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Imports System.Runtime.CompilerServices
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Imports Microsoft.VisualBasic.CommandLine.Reflection
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Imports Microsoft.VisualBasic.Language
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Imports Microsoft.VisualBasic.Scripting.MetaData
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Namespace Imaging
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<Package("ColorMap", Publisher:="Jack J. H. Xu", Category:=APICategories.UtilityTools)>
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Public Module ColorMapsExtensions
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<paramref name="mapName"/>大小写不敏感
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<param name="mapName"></param>
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<param name="map"><see cref="ColorMap.MaxDepth"/></param>
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<param name="min">value should smaller than <see cref="ColorMap.MaxDepth"/> in parameter <paramref name="map"/></param>
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<returns></returns>
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<ExportAPI("Color.Sequence")>
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<Extension>
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Public Function ColorSequence(map As ColorMap, Optional mapName$ = ColorMap.PatternJet, Optional min% = 0) As Color()
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Dim cMap%(,) = map.GetMaps(mapName)()
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Dim maxDepth% = map.MaxDepth
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Dim m% = maxDepth * 2
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Dim sequence As New List(Of Color)
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For i As Integer = 0 To maxDepth - 1
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Dim colorIndex% = CInt((i - min) * m \ (maxDepth - min))
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Dim a = cMap(colorIndex, 0)
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Dim r = cMap(colorIndex, 1)
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Dim g = cMap(colorIndex, 2)
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Dim b = cMap(colorIndex, 3)
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Dim cl As Color = Color.FromArgb(a, r, g, b)
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Call sequence.Add(cl)
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Next
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Return sequence.ToArray
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End Function
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ReadOnly __default As ColorMap = New ColorMap(64%)
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<ExportAPI("Color.Sequence")>
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Public Function ColorSequence(Optional min% = 0, Optional name$ = "Jet") As Color()
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SyncLock __default
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Return ColorSequence(__default, name, min)
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End SyncLock
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End Function
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Public Delegate Function MapsFunc() As Integer(,)
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End Module
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Public Class ColorMap
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Public ReadOnly Property ColorMapLength As Integer = 64
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Alpha value in the RBG color function.
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<returns></returns>
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Public ReadOnly Property Alpha As Integer = 255
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Public ReadOnly Property MaxDepth As Integer
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Get
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Return CInt(ColorMapLength / 2)
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End Get
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End Property
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Sub New()
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End Sub
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Sub New(colorLength%)
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ColorMapLength = colorLength
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End Sub
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<param name="colorLength%"></param>
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<param name="alpha%"><see cref="Color.A"/>: color alpha value</param>
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Sub New(colorLength%, alpha%)
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ColorMapLength = colorLength
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Me.Alpha = alpha
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End Sub
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Public ReadOnly Property ColorMaps As New Dictionary(Of String, MapsFunc) From {
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_
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{NameOf(Me.Autumn).ToLower, AddressOf Me.Autumn},
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{NameOf(Me.Cool).ToLower, AddressOf Me.Cool},
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{NameOf(Me.Gray).ToLower, AddressOf Me.Gray},
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{NameOf(Me.Hot).ToLower, AddressOf Me.Hot},
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{NameOf(Me.Jet).ToLower, AddressOf Me.Jet},
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{NameOf(Me.Spring).ToLower, AddressOf Me.Spring},
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{NameOf(Me.Summer).ToLower, AddressOf Me.Summer},
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{NameOf(Me.Winter).ToLower, AddressOf Me.Winter}
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}
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Spring
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Public Const PatternSpring As String = "Spring"
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Summer
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Public Const PatternSummer As String = "Summer"
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Autumn
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Public Const PatternAutumn As String = "Autumn"
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Winter
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Public Const PatternWinter As String = "Winter"
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Jet
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Public Const PatternJet As String = "Jet"
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Gray
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Public Const PatternGray As String = "Gray"
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Hot
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Public Const PatternHot As String = "Hot"
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Cool
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Public Const PatternCool As String = "Cool"
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If failure, then this function will returns <see cref="Jet"/> by default,
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or nothing if parameter <paramref name="noDefault"/> is set True.
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<param name="name">大小写不敏感</param>
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<returns></returns>
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Public Function GetMaps(name As String, Optional noDefault As Boolean = False) As MapsFunc
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Static key As New Value(Of String)
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SyncLock key
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If Not name Is Nothing AndAlso
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ColorMaps.ContainsKey(key = name.ToLower) Then
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Return ColorMaps(key)
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Else
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If noDefault Then
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Return Nothing
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Else
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Return AddressOf Jet
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End If
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End If
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End SyncLock
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End Function
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#Region "Color Patterns"
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Public Function Spring() As Integer(,)
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Dim cmap As Integer(,) = New Integer(ColorMapLength - 1, 3) {}
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Dim spring__1 As Single() = New Single(ColorMapLength - 1) {}
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For i As Integer = 0 To ColorMapLength - 1
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spring__1(i) = 1.0F * i / (ColorMapLength - 1)
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cmap(i, 0) = Alpha
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cmap(i, 1) = 255
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cmap(i, 2) = CInt(Truncate(255 * spring__1(i)))
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cmap(i, 3) = 255 - cmap(i, 1)
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Next
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Return cmap
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End Function
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Public Function Summer() As Integer(,)
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Dim cmap As Integer(,) = New Integer(ColorMapLength - 1, 3) {}
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Dim summer__1 As Single() = New Single(ColorMapLength - 1) {}
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For i As Integer = 0 To ColorMapLength - 1
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summer__1(i) = 1.0F * i / (ColorMapLength - 1)
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cmap(i, 0) = Alpha
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cmap(i, 1) = CInt(Truncate(255 * summer__1(i)))
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cmap(i, 2) = CInt(Truncate(255 * 0.5F * (1 + summer__1(i))))
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cmap(i, 3) = CInt(Truncate(255 * 0.4F))
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Next
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Return cmap
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End Function
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Public Function Autumn() As Integer(,)
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Dim cmap As Integer(,) = New Integer(ColorMapLength - 1, 3) {}
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Dim autumn__1 As Single() = New Single(ColorMapLength - 1) {}
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For i As Integer = 0 To ColorMapLength - 1
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autumn__1(i) = 1.0F * i / (ColorMapLength - 1)
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cmap(i, 0) = Alpha
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cmap(i, 1) = 255
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cmap(i, 2) = CInt(Truncate(255 * autumn__1(i)))
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cmap(i, 3) = 0
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Next
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Return cmap
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End Function
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Public Function Winter() As Integer(,)
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Dim cmap As Integer(,) = New Integer(ColorMapLength - 1, 3) {}
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Dim winter__1 As Single() = New Single(ColorMapLength - 1) {}
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For i As Integer = 0 To ColorMapLength - 1
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winter__1(i) = 1.0F * i / (ColorMapLength - 1)
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cmap(i, 0) = Alpha
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cmap(i, 1) = 0
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cmap(i, 2) = CInt(Truncate(255 * winter__1(i)))
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cmap(i, 3) = CInt(Truncate(255 * (1.0F - 0.5F * winter__1(i))))
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Next
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Return cmap
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End Function
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Public Function Gray() As Integer(,)
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Dim cmap As Integer(,) = New Integer(ColorMapLength - 1, 3) {}
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Dim gray__1 As Single() = New Single(ColorMapLength - 1) {}
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For i As Integer = 0 To ColorMapLength - 1
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gray__1(i) = 1.0F * i / (ColorMapLength - 1)
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cmap(i, 0) = Alpha
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cmap(i, 1) = CInt(Truncate(255 * gray__1(i)))
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cmap(i, 2) = CInt(Truncate(255 * gray__1(i)))
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cmap(i, 3) = CInt(Truncate(255 * gray__1(i)))
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Next
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Return cmap
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End Function
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*
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<returns></returns>
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Public Function Jet() As Integer(,)
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Dim cmap As Integer(,) = New Integer(ColorMapLength - 1, 3) {}
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Dim cMatrix As Single(,) = New Single(ColorMapLength - 1, 2) {}
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Dim n As Integer = CInt(Truncate(Ceiling(ColorMapLength / 4.0F)))
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Dim nMod As Integer = 0
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Dim fArray As Single() = New Single(3 * n - 2) {}
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Dim red As Integer() = New Integer(fArray.Length - 1) {}
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Dim green As Integer() = New Integer(fArray.Length - 1) {}
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Dim blue As Integer() = New Integer(fArray.Length - 1) {}
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If ColorMapLength Mod 4 = 1 Then
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nMod = 1
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End If
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For i As Integer = 0 To fArray.Length - 1
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If i < n Then
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fArray(i) = CSng(i + 1) / n
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ElseIf i >= n AndAlso i < 2 * n - 1 Then
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fArray(i) = 1.0F
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ElseIf i >= 2 * n - 1 Then
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fArray(i) = CSng(3 * n - 1 - i) / n
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End If
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green(i) = CInt(Truncate(Ceiling(n / 2.0F))) - nMod + i
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red(i) = green(i) + n
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blue(i) = green(i) - n
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Next
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Dim nb As Integer = 0
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For i As Integer = 0 To blue.Length - 1
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If blue(i) > 0 Then
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nb += 1
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End If
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Next
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For i As Integer = 0 To ColorMapLength - 1
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For j As Integer = 0 To red.Length - 1
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If i = red(j) AndAlso red(j) < ColorMapLength Then
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cMatrix(i, 0) = fArray(i - red(0))
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End If
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Next
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For j As Integer = 0 To green.Length - 1
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If i = green(j) AndAlso green(j) < ColorMapLength Then
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cMatrix(i, 1) = fArray(i - CInt(green(0)))
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End If
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Next
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For j As Integer = 0 To blue.Length - 1
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If i = blue(j) AndAlso blue(j) >= 0 Then
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cMatrix(i, 2) = fArray(fArray.Length - 1 - nb + i)
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End If
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Next
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Next
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For i As Integer = 0 To ColorMapLength - 1
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cmap(i, 0) = Alpha
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For j As Integer = 0 To 2
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cmap(i, j + 1) = CInt(Truncate(cMatrix(i, j) * 255))
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Next
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Next
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Return cmap
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End Function
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Public Function Hot() As Integer(,)
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Dim cmap As Integer(,) = New Integer(ColorMapLength - 1, 3) {}
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Dim n As Integer = 3 * ColorMapLength \ 8
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Dim red As Single() = New Single(ColorMapLength - 1) {}
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Dim green As Single() = New Single(ColorMapLength - 1) {}
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Dim blue As Single() = New Single(ColorMapLength - 1) {}
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For i As Integer = 0 To ColorMapLength - 1
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If i < n Then
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red(i) = 1.0F * (i + 1) / n
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Else
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red(i) = 1.0F
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End If
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If i < n Then
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green(i) = 0F
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ElseIf i >= n AndAlso i < 2 * n Then
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green(i) = 1.0F * (i + 1 - n) / n
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Else
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green(i) = 1.0F
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End If
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If i < 2 * n Then
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blue(i) = 0F
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Else
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blue(i) = 1.0F * (i + 1 - 2 * n) / (ColorMapLength - 2 * n)
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End If
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cmap(i, 0) = Alpha
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cmap(i, 1) = CInt(Truncate(255 * red(i)))
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cmap(i, 2) = CInt(Truncate(255 * green(i)))
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cmap(i, 3) = CInt(Truncate(255 * blue(i)))
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Next
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Return cmap
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End Function
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Public Function Cool() As Integer(,)
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Dim cmap As Integer(,) = New Integer(ColorMapLength - 1, 3) {}
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Dim cool__1 As Single() = New Single(ColorMapLength - 1) {}
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For i As Integer = 0 To ColorMapLength - 1
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cool__1(i) = 1.0F * i / (ColorMapLength - 1)
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cmap(i, 0) = Alpha
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cmap(i, 1) = CInt(Truncate(255 * cool__1(i)))
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cmap(i, 2) = CInt(Truncate(255 * (1 - cool__1(i))))
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cmap(i, 3) = 255
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Next
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Return cmap
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End Function
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#End Region
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End Class
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End Namespace
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