-
Notifications
You must be signed in to change notification settings - Fork 2
/
vis_gridstates.py
153 lines (117 loc) · 4.07 KB
/
vis_gridstates.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
#!/usr/bin/env python
import sys
import numpy as np
import pygame
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
color_map = [BLACK, WHITE]
igrid = 0 # Grid number to visualise
if (len(sys.argv)>1): # Read from command line if present
igrid = int(sys.argv[1])
# Open file for binary reading
gridfile = open("gridstates.bin", "rb")
# Size of grid
try:
L = np.fromfile(gridfile, dtype=np.int32, count=1)[0]
except: # reached EOF
print("Could not read header from gridstates.bin")
exit()
# Number of grids
ngrids = np.fromfile(gridfile, dtype=np.int32, count=1)[0]
# Current MC sweep
isweep = np.fromfile(gridfile, dtype=np.int32, count=1)[0]
# Sanity check
if (igrid >= ngrids):
print("Specified grid index is larger than number of grids in file!")
exit()
# Report header
print("Header reports L = ",L)
print(" ngrids = ",ngrids)
print(" current sweep = ",isweep)
# Number of bytes per timeslice
bytes_per_slice = 12+ngrids*(L*L//8)
# Array to hold state of lattice
grid = np.empty([L, L], dtype=np.int)
# Populate with first entry
gridfile.seek(bytes_per_slice*isweep + 12 + igrid*(L*L//8))
gridbuffer = np.fromfile(gridfile, dtype=np.ubyte, count=L*L//8)
# Set display
pygame.init()
block_size = 10
size = (block_size*L, block_size*L)
screen = pygame.display.set_mode(size)
pygame.display.set_caption("Sweep : %.d" % isweep)
screen.fill(BLACK)
pygame.display.flip()
clock = pygame.time.Clock()
# Loop until we break due to an error
running = True
advance = True
iframe = 0
while True:
# Unpack grid from gridbuffer
irow = 0
icol = 0
for byte in gridbuffer:
bits = np.unpackbits(byte, bitorder='little')
for bit in bits:
grid[irow][icol] = bit
icol = icol + 1
if icol==L:
icol = 0;
irow = irow+1;
# Draw grid
for irow, row in enumerate(grid):
for icol, col in enumerate(row):
pixel = grid[irow][icol]
pygame.draw.rect(screen, color_map[pixel],
[icol*block_size, irow*block_size, block_size, block_size])
# Process events
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_p:
advance = not advance;
if event.key == pygame.K_LEFT:
iframe = max(iframe-1,0)
advance = False
if event.key == pygame.K_RIGHT:
iframe += 1
advance = False
if event.key == pygame.K_UP:
igrid = min(igrid+1,ngrids-1)
if event.key == pygame.K_DOWN:
igrid = max(igrid-1,0)
if event.key == pygame.K_w:
outfile = open("gridinput.bin","wb")
outfile.write(L.tobytes())
gridbuffer.tofile(outfile)
outfile.close()
print("Grid snapshot written to gridinput.bin")
# Update and limit frame rate
time_string = "Grid : %d, Sweep : %.d" % (igrid,isweep)
pygame.display.set_caption(time_string)
pygame.display.flip()
clock.tick()
if not running:
break
if (advance):
iframe += 1
# Read next header and quit if not present
try:
gridfile.seek(bytes_per_slice*(iframe))
L = np.fromfile(gridfile, dtype=np.int32, count=1)[0]
except: # reached EOF
break;
# Number of grids
ngrids = np.fromfile(gridfile, dtype=np.int32, count=1)[0]
# Current MC sweep
isweep = np.fromfile(gridfile, dtype=np.int32, count=1)[0]
# Read the grid
#gridfile.seek(igrid*(L*L//8),1) # Move to igrid
#gridbuffer = np.fromfile(gridfile, dtype=np.ubyte, count=L*L//8)
#gridfile.seek((ngrids-igrid+1)*(L*L//8),1) # skip remaining grids
gridfile.seek(bytes_per_slice*iframe + 12 + igrid*(L*L//8))
gridbuffer = np.fromfile(gridfile, dtype=np.ubyte, count=L*L//8)
gridfile.close()