Komputer Grafik - Membuat Garis dengan Metode DDA

Desain Form

Desain Form Program

Properties

Nama	Atribut	Nilai
Text1 (TextBox)	Name	txtAwal
Text2 (TextBox)	Name	txtAkhir
Command1 (CommandButton)	Name	cmdDDA
	Caption	DDA
List1 (ListBox)	Name	lisOutput
Label1	Caption	Nilai Awal
Label2	Caption	Nilai Akhir
Picture1 (PictureBox)	ScaleMode	3 - Pixel
	Name	picOut

Source Code

Private Sub cmdDDA_Click()
'Deklarasi variabel
Dim awal() As String
Dim akhir() As String
Dim x As Double, y As Double
Dim dx As Integer, dy As Integer
Dim x1 As Integer, y1 As Integer
Dim x2 As Integer, y2 As Integer
Dim step As Integer
Dim x_inc As Double, y_inc As Double
Dim k As Integer
'Pecah input awal dan akhir
awal = Split(txtAwal.Text, ",")
akhir = Split(txtAkhir.Text, ",")
'Masukkan hasil pemecahan ke nilai x dan y
x1 = Val(awal(0))
y1 = Val(awal(1))
x2 = Val(akhir(0))
y2 = Val(akhir(1))
'Hitung nilai dx dan dy
dx = x2 - x1
dy = y2 - y1
'Tentukan nilai titik awal
x = x1
y = y1
'Menentukan nilai step
If Abs(dx) > Abs(dy) Then
    step = Abs(dx)
Else
    step = Abs(dy)
End If
'Hitung increment
x_inc = dx / step
y_inc = dy / step
'Membersihkan picture box dan list box
picOut.Cls
listOutput.Clear
'Masukkan nilai titik awal
picOut.PSet (Fix(x), Fix(y))
listOutput.AddItem "x0=" & x & ", y0=" & y
'Masukkan nilai titik yang lain hingga akhir
For k = 0 To step - 1
    x = x + x_inc
    y = y + y_inc
    listOutput.AddItem "x" & (k + 1) & "=" & x & ", y" & (k + 1) & "=" & y
    picOut.PSet (Fix(x), Fix(y))
Next k
End Sub

Hasil Running

Hasil Running Program

Read More