mirror of
https://git.minetest.land/VoxeLibre/VoxeLibre.git
synced 2024-11-22 10:31:06 +01:00
114 lines
2.5 KiB
Python
114 lines
2.5 KiB
Python
import png
|
|
w, h = 16, 128;
|
|
s = [[int(0) for c in range(w)] for c in range(h)]
|
|
|
|
def drawpixel(x, y, t):
|
|
if (x >= 0) and (x < w) and (y >= 0) and (y < h):
|
|
if(t == 1):
|
|
s[y][x] = 1
|
|
elif t==2:
|
|
s[y][x] = 1 - s[y][x]
|
|
elif t==3:
|
|
s[y][x] = s[y][x] + 1
|
|
if s[y][x] > 3:
|
|
s[y][x] =s[y][x]-4
|
|
|
|
def circle(X1, Y1, R, t):
|
|
x = 0
|
|
y = R
|
|
delta = 1 - 2 * R
|
|
error = 0
|
|
while y >= 0:
|
|
if Y1%w + y < w:
|
|
drawpixel(X1 + x, Y1 + y, t)
|
|
if Y1%w - y >= 0:
|
|
drawpixel(X1 + x, Y1 - y, t)
|
|
if Y1%w + y < w:
|
|
drawpixel(X1 - x, Y1 + y, t)
|
|
if Y1%w - y >= 0:
|
|
drawpixel(X1 - x, Y1 - y, t)
|
|
error = 2 * (delta + y) - 1
|
|
if ((delta < 0) and (error <= 0)):
|
|
x = x + 1
|
|
delta = delta + 2 * x + 1
|
|
elif ((delta > 0) and (error > 0)):
|
|
y = y - 1
|
|
delta = delta - 2 * y + 1
|
|
else:
|
|
x = x + 1
|
|
y = y - 1
|
|
delta = delta + 2 * (x - y)
|
|
|
|
def line(y1, x1, y2, x2, v):
|
|
signx = 1
|
|
signy = 1
|
|
dx = x2 - x1
|
|
dy = y2 - y1
|
|
if dx < 0:
|
|
dx = - dx
|
|
signx = -1
|
|
if dy < 0:
|
|
dy = - dy
|
|
signy = -1
|
|
offsx = dx/2
|
|
offsy = dy/2
|
|
dir1 = 0
|
|
if dx >= dy:
|
|
dir1 = 1
|
|
for i in range(max(dx, dy)+1):
|
|
if(v == 1):
|
|
s[x1][y1] = 1
|
|
elif v==2:
|
|
s[x1][y1] = 1 - s[x1][y1]
|
|
elif v==3 or (v==4 and ((x1^y1)&1)) or (v==5 and (((x1|y1)&1)==0)) or (v==7 and ((((x1+1)|y1)&1)==0)) or (v==8 and ((((x1+1)|(y1+1))&1)==0)) or (v==6 and (((x1|(y1+1))&1)==0)):
|
|
s[x1][y1] = s[x1][y1] + 1
|
|
if s[x1][y1] > 3:
|
|
s[x1][y1] = s[x1][y1] - 4
|
|
if dir1 == 1:
|
|
x1 += signx
|
|
offsy += dy
|
|
if offsy >= dx:
|
|
y1 += signy
|
|
offsy -= dx
|
|
else:
|
|
y1 += signy
|
|
offsx += dx
|
|
if offsx >= dy:
|
|
x1 += signx
|
|
offsx -= dy
|
|
|
|
# R, G, B, Alpha (0xFF = opaque):
|
|
palette=[
|
|
(0x30,0x03,0xaf,0xa4),
|
|
(0x4f,0x1c,0xaf,0xb4),
|
|
(0x7f,0x3d,0xa0,0xc8),
|
|
(0x6d,0x5d,0x99,0xb1)
|
|
]
|
|
|
|
circles = h//w
|
|
maxr = w//2
|
|
for i in [1,2,3,5,9,10,11,13]:
|
|
for c in range(circles):
|
|
q = ((circles-c-1)+i)%w
|
|
circle(maxr, maxr+c*w, q, 3)
|
|
|
|
|
|
linesperside = 2
|
|
linestarts = round(w / linesperside) # 8
|
|
lineoffset = round(w / linestarts) # 2
|
|
wminus = w - 1
|
|
|
|
for j in range(linesperside):
|
|
for k in range(linestarts):
|
|
offset = k * w
|
|
for q in [0,1,3,4]:
|
|
# for q in [1]:
|
|
i = j*linestarts + ((k+q)%linestarts)
|
|
line(i, offset, wminus-i, offset+wminus, 5+(k&3))
|
|
line(wminus, offset+i, 0, offset+wminus-i, 5+(k&3))
|
|
|
|
|
|
|
|
w = png.Writer(len(s[0]), len(s), palette=palette, bitdepth=2)
|
|
f = open('mcl_portals_portal.png', 'wb')
|
|
w.write(f, s)
|