One experiment with number of points I updated very recently:
One point almost takes us back to Ectoplasm.
Code: (Select All)
_Title "Plasmatic nPoints Test #2, press spacebar for new color set" 'b+ 2020-01-22
' from Plasmatic press spacebar for new coloring set" ' b+ 2020-01-20 translated and modified from SmallBASIC
'Plasma Magnifico - updated 2015-11-26 for Android
'This program creates a plasma surface, which looks oily or silky.
'2022-05-02 take nPoints out of const and change with spacebar
Const xmax = 800, ymax = 600 '<<<<<<<<<<<<<<<<<< use 1 to 8 after 8 it runs too slow to enjoy most interesting is 1 or 2
Type xy
x As Single
y As Single
dx As Single
dy As Single
End Type
Screen _NewImage(xmax, ymax, 32)
_ScreenMove 300, 40
restart:
nPoints = Int(Rnd * 15) + 1
_Title " Plasmatic N Points =" + Str$(nPoints)
ReDim c((nPoints + 1) * 80) As _Unsigned Long, p(nPoints) As xy, f(nPoints)
Cls
r = Rnd: g = Rnd: b = Rnd: i = 0
For n = 1 To nPoints
r1 = r: g1 = g: b1 = b
Do: r = Rnd: Loop Until Abs(r - r1) > .1
Do: g = Rnd: Loop Until Abs(g - g1) > .1
Do: b = Rnd: Loop Until Abs(g - g1) > .1
For m = 0 To 17: m1 = 17 - m
f1 = (m * r) / 18: f2 = (m * g) / 18: f3 = (m * b) / 18: c(i) = rgbf(f1, f2, f3): i = i + 1
Next
For m = 0 To 17: m1 = 17 - m
f1 = (m + m1 * r) / 18: f2 = (m + m1 * g) / 18: f3 = (m + m1 * b) / 18: c(i) = rgbf(f1, f2, f3): i = i + 1
Next
For m = 0 To 17: m1 = 17 - m
f1 = (m1 + m * r) / 18: f2 = (m1 + m * g) / 18: f3 = (m1 + m * b) / 18: c(i) = rgbf(f1, f2, f3): i = i + 1
Next
For m = 0 To 17: m1 = 17 - m
f1 = (m1 * r) / 18: f2 = (m1 * g) / 18: f3 = (m1 * b) / 18: c(i) = rgbf(f1, f2, f3): i = i + 1
Next
Next
For n = 0 To nPoints
p(n).x = Rnd * xmax: p(n).y = Rnd * ymax: p(n).dx = Rnd * 2 - 1: p(n).dy = Rnd * 2 - 1
f(n) = Rnd * .1
Next
While _KeyDown(27) = 0
If InKey$ = " " Then GoTo restart
For i = 0 To nPoints
p(i).x = p(i).x + p(i).dx
If p(i).x > xmax Or p(i).x < 0 Then p(i).dx = -p(i).dx
p(i).y = p(i).y + p(i).dy
If p(i).y > ymax Or p(i).y < 0 Then p(i).dy = -p(i).dy
Next
For y = 0 To ymax - 1 Step 2
For x = 0 To xmax - 1 Step 2
d = 0
For n = 0 To nPoints
dx = x - p(n).x: dy = y - p(n).y
k = Sqr(dx * dx + dy * dy)
d = d + (Sin(k * f(n)) + 1) / 2
Next n: d = d * 60
Line (x, y)-Step(2, 2), c(d), BF
Next
Next
_Display
_Limit 100
Wend
Function rgbf~& (n1, n2, n3)
rgbf~& = _RGB32(n1 * 255, n2 * 255, n3 * 255)
End Function
One point almost takes us back to Ectoplasm.
b = b + ...