SYMMETRIC IMAGE 01 - program symmetry05

        

Image properties: Picture box Picture1, Cartesian plain: x from –3 to +3; y from –3 to +3; dimension: width 500 pixels, height 500 pixels, command button for nex image

Result description: symmetrical image, curve-irregular shapes, iridescent colors
 
Basic concept: polar coordinates (radius r and angle fi) of the current pixel and some cycle-related random values used as the only variables to define the pixel color. Image forms and shapes are the consequence of color distribution (algorithmic programming approach).

Algorithm description: At the beginning a defined number of random values are generated which are later used as auxiliary constants. Then the program calculates polar coordinates for each pixel and uses them together with previous generated constants to calculate the RGB color components. There are two types of GRB components used: random defined in the beginning of each cycle (k1, k2, k3) and mathematically calculated (re, gr, bl). Image area is processing by columns from left to right.

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Visual Basic source code

Private Sub Command1_Click()
    Call draw
End Sub

Private Sub Form_Load()
    Form1.Show: Randomize Timer
    Call draw
End Sub

Private Sub draw()
    Randomize Timer
    On Error Resume Next: Cls
    n1 = 5 + Rnd * 5: n2 = 5 + Rnd * 5: n3 = 5 + Rnd * 5
    f1 = Int(2 + Rnd * 10): f2 = Int(2 + Rnd * 10): f3 = Int(2 + Rnd * 10)
    k1 = Rnd * 256: k2 = Rnd * 256: k3 = Rnd * 256
    typ = Int(1 + Rnd * 7)
    For i = 0 To 500: For j = 0 To 500
    x = (i - 500 / 2) / (500 / 6): y = (500 / 2 - j) / (500 / 6)
    r = Sqr(x * x + y * y): fi = Atn(y / x)
    re = k1 * ((n1 + Sin(n1 * r)) + (n2 + Cos(2 * f1 * fi))) Mod 256
    gr = k2 * ((n2 + Cos(n2 * r)) + (n3 + Sin(2 * f2 * fi))) Mod 256
    bl = k3 * ((n3 + Sin(n3 * r)) + (n1 + Cos(2 * f3 * fi))) Mod 256
    If typ = 1 Then Picture1.PSet (i, j), RGB(re, gr, bl)
    If typ = 2 Then Picture1.PSet (i, j), RGB(k1, gr, bl)
    If typ = 3 Then Picture1.PSet (i, j), RGB(re, k2, bl)
    If typ = 4 Then Picture1.PSet (i, j), RGB(re, gr, k3)
    If typ = 5 Then Picture1.PSet (i, j), RGB(k1, k2, bl)
    If typ = 6 Then Picture1.PSet (i, j), RGB(re, k2, k3)
    If typ = 7 Then Picture1.PSet (i, j), RGB(k1, gr, k3)
    Next j: Next i
End Sub