Random Tessellations

[bplus]

So Charlie if one symmetry is good, what's 2 way symmetry look like:

Code: (Select All)

_Title "Tessellation 3 use b to toggle to 1 color and black or full color"
' b+ 2023-05-09 - Tiling with a pattern
' Tessellation 2 will try color filled with more background black.
' Tessellation 3 Charlie mentions a mirror image for interesting tessellating,
' lets try mirroring both x and y axis.
'
' Inspired by Charlie's BAM example:
' https://staging.qb64phoenix.com/showthread.php?tid=1646&pid=15772#pid15772
'
' But I also wanted to try a colorized version.
'
'  So use b key to toggle between:
'  1. a mod of Charlies version with different pixel block size with black backgrounds
'  2. the colorized version which reminds me of Magic Eye Art
'
DefLng A-Z
Screen _NewImage(800, 600, 12) ' only 16 colors here
_ScreenMove 250, 50
Dim Shared Pix '   Pix is number of pixels to Tile side
Dim Shared Scale ' Change a pixel to a bigger square block for not so subtle patterns
Dim Shared Tile '  Handle that stores Tile Image in memory to call up with _PutImage
Dim Shared B '     Set color mode from Full 16 colors Rainbow to 1 like for printing a label
Do
    If InKey$ = "b" Then B = 1 - B '    toggle coloring mode on a b keypress
    MakeTile '                          create a new random tiling pattern
    Tessellate '                        tile the screen with it
    _PrintString (740, 580), "ZZZ..." ' Show user we are sleeping awaiting a key press
    Sleep
Loop Until _KeyDown(27) ' quit when detect escape key on sleep

Sub MakeTile ' make a random tile to Tesselate according to B Mode coloring
    Pix = Int(Rnd * 9) + 4 '           sets tile size: pix X pix or a 4X4 to 12X12 Tile coloring
    Scale = Int(Rnd * 6) + 4 '         to change pixels to square blocks
    If Tile Then _FreeImage Tile '     throw old image away
    Tile = _NewImage(2 * Scale * Pix - 1, 2 * Scale * Pix - 1) '   make new one
    _Dest Tile '                       draw in the memory area Tile not on screen
    oneColor = Int(Rnd * 15) + 1 '     one color and black background for B Mode
    For y = 0 To Scale * Pix Step Scale
        For x = 0 To Scale * Pix Step Scale
            If B Then
                If Rnd < .5 Then c = 0 Else c = oneColor 'one color and black background for B Mode
            Else
                c = Int(Rnd * 16)
            End If
            Line (x, y)-Step(Scale, Scale), c, BF ' this should be integer since Tile is
            Line (2 * Scale * Pix - x - 1, y)-Step(Scale, Scale), c, BF
            Line (x, 2 * Scale * Pix - y - 1)-Step(Scale, Scale), c, BF
            Line (2 * Scale * Pix - x - 1, 2 * Scale * Pix - y - 1)-Step(Scale, Scale), c, BF
        Next
    Next
    _Dest 0
End Sub

Sub Tessellate ' just covering the screen with our Tile
    For y = 0 To _Height Step 2 * Scale * Pix
        For x = 0 To _Width Step 2 * Scale * Pix
            _PutImage (x, y)-Step(2 * Scale * Pix, 2 * Scale * Pix), Tile, 0
        Next
    Next
End Sub

Full color is back with all 16 available for being employed:
   

Toggle to 1 color and black:
   

Gotta say, so far I think I am progressing   after edit, I see something wrong in symmetry of crosses, dang!
EDIT #2: OK now I think I got perfect symmetry, updated code and snaps.