'
' Created by SharpDevelop.
' User: 14manvilleA
' Date: 27/09/2019
' Time: 10:18
' 
' To change this template use Tools | Options | Coding | Edit Standard Headers.
'
Imports System.Drawing

Public Class View3D
    Protected _objects As New Dictionary(Of String, Pair(Of ICoordinates3D, Color))
    Protected _bitmapimage As Bitmap = Nothing
    Protected _operateauto As Boolean = False
    Protected _width As Integer = 0
    Protected _height As Integer = 0
    Protected _backcolor As Color = Color.Black
    Public Sub New(width As Integer, height As Integer, Optional backcolor As Color = Nothing, Optional refreshafterop As Boolean = False)
        _width = width
        _height = height
        _operateauto = refreshafterop
        _bitmapimage = New Bitmap(width, height)
        If backcolor.IsEmpty Then
            _backcolor = Color.Black
        Else
            _backcolor = backcolor
        End If
        Using g As Graphics = Graphics.FromImage(_bitmapimage)
            g.Clear(backcolor)
        End Using
    End Sub
    Public ReadOnly Property getImage() As Bitmap
        Get
            Return _bitmapimage.Clone(New Rectangle(0, 0, _bitmapimage.Width, _bitmapimage.Height), _bitmapimage.PixelFormat)
        End Get
    End Property
    Public ReadOnly Property width() As Integer
        Get
            Return _width
        End Get
    End Property
    Public ReadOnly Property height() As Integer
        Get
            Return _height
        End Get
    End Property
    Public Property refreshAfterOperation() As Boolean
        Get
            Return _operateauto
        End Get
        Set(value As Boolean)
            _operateauto = value
            If _operateauto Then refresh()
        End Set
    End Property
    Public Property backgroundColor() As Color
        Get
            Return _backcolor
        End Get
        Set(value As Color)
            _backcolor = value
            If _operateauto Then refresh()
        End Set
    End Property
    Public Function getObject(Of t As ICoordinates3D)(name As String) As t
        If _objects.ContainsKey(name) Then
            Return _objects(name).valueA
        End If
        Return Nothing
    End Function
    Public Sub setObject(Of t As ICoordinates3D)(name As String, [object] As t)
        If [object] Is Nothing Then
            If _objects.ContainsKey(name) Then
                _objects.Remove(name)
            Else
                Throw New InvalidOperationException()
            End If
        Else
            If _objects.ContainsKey(name) Then
                Dim p As Pair(Of ICoordinates3D, Color) = _objects(name)
                p.valueA = [object]
                _objects(name) = p
            Else
                _objects.Add(name, New Pair(Of ICoordinates3D, Color)([object], _backcolor))
            End If
        End If
        If _operateauto Then refresh()
    End Sub
    Public Function getObjectColor(name As String) As Color
        If _objects.ContainsKey(name) Then
            Return _objects(name).valueB
        End If
        Return Nothing
    End Function
    Public Sub setObjectColor(name As String, [color] As Color)
        If color.IsEmpty Then
            Throw New InvalidOperationException()
        Else
            If _objects.ContainsKey(name) Then
                Dim p As Pair(Of ICoordinates3D, Color) = _objects(name)
                p.valueB = color
                _objects(name) = p
            Else
                Throw New InvalidOperationException()
            End If
        End If
        If _operateauto Then refresh()
    End Sub
    Dim slockrf As New Object()
    Public Sub refresh()
        SyncLock slockrf
            render()
        End SyncLock
    End Sub

    Protected Sub render()
        Using g As Graphics = Graphics.FromImage(_bitmapimage)
            g.Clear(_backcolor)
            Dim objs As New List(Of Pair(Of ICoordinates3D, Color))
            Dim objsorder As New List(Of Integer)
            Dim avgz As New List(Of Integer)
            Dim piv As New List(Of Pair(Of Integer, Single))
            For q = 0 To _objects.Values.Count - 1
                Dim obj As Pair(Of ICoordinates3D, Color) = _objects.Values(q)
                Dim cavgz As Single = 0
                Dim cnt As Integer = 0
                Dim array = obj.valueA.returnScaledPoints(_width, _height, 256, 128)
                For i = 0 To array.Length - 1
                    Dim z As Point3D = array(i)
                    Dim cz As Single = z.Z
                    cavgz += cz
                    cnt += 1
                Next
                cavgz /= cnt
                avgz.Add(cavgz)
                objs.Add(obj)
                piv.Add(New Pair(Of Integer, Single)(q, cavgz))
            Next
            piv.Sort(New IntegerSinglePairInverseSorter())
            '#DEBUG#
            'Console.WriteLine("#START#")
            Dim array1 = piv.ToArray
            For i = 0 To array1.Length - 1
                Dim pr As Pair(Of Integer, Single) = array1(i)
                objsorder.Add(pr.valueA)
                '#DEBUG#
                'Console.WriteLine("#" & pr.valueA & ":" & pr.valueB & "#")
            Next
            '#DEBUG#
            'Console.WriteLine("#FINISH#")
            For j As Integer = 0 To objsorder.Count - 1
                Dim index As Integer = objsorder(j)
                Dim ps3d As Point3D() = objs(index).valueA.returnScaledPoints(_width, _height, 256, 128)
                Dim pnts As New List(Of PointF)
                For i = 0 To ps3d.Length - 1
                    Dim p3d As Point3D = ps3d(i)
                    pnts.Add(New PointF(CInt(p3d.X), CInt(p3d.Y)))
                Next
                Dim points As PointF() = pnts.ToArray
                Using b As Brush = New SolidBrush(objs(index).valueB)
                    g.FillPolygon(b, points)
                End Using
            Next
        End Using
    End Sub

    Protected Class IntegerSinglePairInverseSorter
        Implements IComparer(Of Pair(Of Integer, Single))

        Public Function Compare(x As Pair(Of Integer, Single), y As Pair(Of Integer, Single)) As Integer Implements IComparer(Of Pair(Of Integer, Single)).Compare
            If x.valueB < y.valueB Then
                Return -1
            ElseIf x.valueB > y.valueB Then
                Return 1
            End If
            Return 0
        End Function
    End Class

    Protected Structure Pair(Of a, b)
        Public valueA As a
        Public valueB As b
        Public Sub New(va As a, vb As b)
            valueA = va
            valueB = vb
        End Sub
    End Structure
End Class