# True-color plasma fractal using non-recursive algorithm
# FB - 20160122
import random
from PIL import Image
imgx = 512; imgy = 512
image = Image.new("RGB", (imgx, imgy))
pixels = image.load()
mx = imgx - 1; my = imgy - 1
f = 2.0 # roughness
def putpixel(x, y, r, g, b):
global pixels
pixels[int(round(x)), int(round(y))] = \
(int(round(r)), int(round(g)), int(round(b)))
def getpixel(x, y):
return pixels[int(round(x)), int(round(y))]
putpixel(0, 0, random.randint(0, 255), \
random.randint(0, 255), random.randint(0, 255))
putpixel(mx, 0, random.randint(0, 255), \
random.randint(0, 255), random.randint(0, 255))
putpixel(mx, my, random.randint(0, 255), \
random.randint(0, 255), random.randint(0, 255))
putpixel(0, my, random.randint(0, 255), \
random.randint(0, 255), random.randint(0, 255))
j = -1
while True:
j += 1; j2 = 2 ** j
jx = float(mx) / j2; jy = float(my) / j2
if jx < 1 and jy < 1: break
for i in range(j2):
y0 = i * jy; y1 = y0 + jy; y = y0 + jy / 2.0
for k in range(j2):
x0 = k * jx; x1 = x0 + jx; x = x0 + jx / 2.0
a = getpixel(x0, y0); b = getpixel(x1, y0)
c = getpixel(x0, y1); d = getpixel(x1, y1)
putpixel(x, y, (a[0] + b[0] + c[0] + d[0]) / 4.0, \
(a[1] + b[1] + c[1] + d[1]) / 4.0, (a[2] + b[2] + c[2] + d[2]) / 4.0)
putpixel(x, y0, (a[0] + b[0]) / 2.0 + jx * (random.random() - .5) * f, \
(a[1] + b[1]) / 2.0 + jx * (random.random() - .5) * f, \
(a[2] + b[2]) / 2.0 + jx * (random.random() - .5) * f)
putpixel(x0, y, (a[0] + c[0]) / 2.0 + jy * (random.random() - .5) * f, \
(a[1] + c[1]) / 2.0 + jy * (random.random() - .5) * f, \
(a[2] + c[2]) / 2.0 + jy * (random.random() - .5) * f)
putpixel(x1, y, (b[0] + d[0]) / 2.0 + jy * (random.random() - .5) * f, \
(b[1] + d[1]) / 2.0 + jy * (random.random() - .5) * f, \
(b[2] + d[2]) / 2.0 + jy * (random.random() - .5) * f)
putpixel(x, y1, (c[0] + d[0]) / 2.0 + jx * (random.random() - .5) * f, \
(c[1] + d[1]) / 2.0 + jx * (random.random() - .5) * f, \
(c[2] + d[2]) / 2.0 + jx * (random.random() - .5) * f)
image.save("plasma.png", "PNG")
Diff to Previous Revision
--- revision 3 2010-03-29 02:28:35
+++ revision 4 2016-01-22 22:44:33
@@ -1,61 +1,56 @@
# True-color plasma fractal using non-recursive algorithm
-# FB - 201003287
+# FB - 20160122
import random
from PIL import Image
-imgx = 512
-imgy = 512
+imgx = 512; imgy = 512
image = Image.new("RGB", (imgx, imgy))
-mx = imgx - 1
-my = imgy - 1
+pixels = image.load()
+mx = imgx - 1; my = imgy - 1
f = 2.0 # roughness
-image.putpixel((0, 0), (random.randint(0, 255),
- random.randint(0, 255),
- random.randint(0, 255)))
-image.putpixel((mx, 0), (random.randint(0, 255),
- random.randint(0, 255),
- random.randint(0, 255)))
-image.putpixel((mx, my), (random.randint(0, 255),
- random.randint(0, 255),
- random.randint(0, 255)))
-image.putpixel((0, my), (random.randint(0, 255),
- random.randint(0, 255),
- random.randint(0, 255)))
+def putpixel(x, y, r, g, b):
+ global pixels
+ pixels[int(round(x)), int(round(y))] = \
+ (int(round(r)), int(round(g)), int(round(b)))
+
+def getpixel(x, y):
+ return pixels[int(round(x)), int(round(y))]
+
+putpixel(0, 0, random.randint(0, 255), \
+ random.randint(0, 255), random.randint(0, 255))
+putpixel(mx, 0, random.randint(0, 255), \
+ random.randint(0, 255), random.randint(0, 255))
+putpixel(mx, my, random.randint(0, 255), \
+ random.randint(0, 255), random.randint(0, 255))
+putpixel(0, my, random.randint(0, 255), \
+ random.randint(0, 255), random.randint(0, 255))
+
j = -1
while True:
- j += 1
- j2 = 2 ** j
- jx = float(mx) / j2
- jy = float(my) / j2
+ j += 1; j2 = 2 ** j
+ jx = float(mx) / j2; jy = float(my) / j2
if jx < 1 and jy < 1: break
for i in range(j2):
- y0 = i * jy
- y1 = y0 + jy
- y = y0 + jy / 2.0
+ y0 = i * jy; y1 = y0 + jy; y = y0 + jy / 2.0
for k in range(j2):
- x0 = k * jx
- x1 = x0 + jx
- x = x0 + jx / 2.0
+ x0 = k * jx; x1 = x0 + jx; x = x0 + jx / 2.0
- a = image.getpixel((x0, y0))
- b = image.getpixel((x1, y0))
- c = image.getpixel((x0, y1))
- d = image.getpixel((x1, y1))
+ a = getpixel(x0, y0); b = getpixel(x1, y0)
+ c = getpixel(x0, y1); d = getpixel(x1, y1)
- image.putpixel((x, y), ((a[0] + b[0] + c[0] + d[0]) / 4.0,
- (a[1] + b[1] + c[1] + d[1]) / 4.0,
- (a[2] + b[2] + c[2] + d[2]) / 4.0))
- image.putpixel((x, y0), ((a[0] + b[0]) / 2.0 + jx * (random.random() - .5) * f,
- (a[1] + b[1]) / 2.0 + jx * (random.random() - .5) * f,
- (a[2] + b[2]) / 2.0 + jx * (random.random() - .5) * f))
- image.putpixel((x0, y), ((a[0] + c[0]) / 2.0 + jy * (random.random() - .5) * f,
- (a[1] + c[1]) / 2.0 + jy * (random.random() - .5) * f,
- (a[2] + c[2]) / 2.0 + jy * (random.random() - .5) * f))
- image.putpixel((x1, y), ((b[0] + d[0]) / 2.0 + jy * (random.random() - .5) * f,
- (b[1] + d[1]) / 2.0 + jy * (random.random() - .5) * f,
- (b[2] + d[2]) / 2.0 + jy * (random.random() - .5) * f))
- image.putpixel((x, y1), ((c[0] + d[0]) / 2.0 + jx * (random.random() - .5) * f,
- (c[1] + d[1]) / 2.0 + jx * (random.random() - .5) * f,
- (c[2] + d[2]) / 2.0 + jx * (random.random() - .5) * f))
+ putpixel(x, y, (a[0] + b[0] + c[0] + d[0]) / 4.0, \
+ (a[1] + b[1] + c[1] + d[1]) / 4.0, (a[2] + b[2] + c[2] + d[2]) / 4.0)
+ putpixel(x, y0, (a[0] + b[0]) / 2.0 + jx * (random.random() - .5) * f, \
+ (a[1] + b[1]) / 2.0 + jx * (random.random() - .5) * f, \
+ (a[2] + b[2]) / 2.0 + jx * (random.random() - .5) * f)
+ putpixel(x0, y, (a[0] + c[0]) / 2.0 + jy * (random.random() - .5) * f, \
+ (a[1] + c[1]) / 2.0 + jy * (random.random() - .5) * f, \
+ (a[2] + c[2]) / 2.0 + jy * (random.random() - .5) * f)
+ putpixel(x1, y, (b[0] + d[0]) / 2.0 + jy * (random.random() - .5) * f, \
+ (b[1] + d[1]) / 2.0 + jy * (random.random() - .5) * f, \
+ (b[2] + d[2]) / 2.0 + jy * (random.random() - .5) * f)
+ putpixel(x, y1, (c[0] + d[0]) / 2.0 + jx * (random.random() - .5) * f, \
+ (c[1] + d[1]) / 2.0 + jx * (random.random() - .5) * f, \
+ (c[2] + d[2]) / 2.0 + jx * (random.random() - .5) * f)
-image.save("plasma3.png", "PNG")
+image.save("plasma.png", "PNG")
