-
Notifications
You must be signed in to change notification settings - Fork 6
/
Universal Generator Irregular.py
221 lines (177 loc) · 7.11 KB
/
Universal Generator Irregular.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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
#
# This script generates a 3D galaxy from a number of parameters and stores
# it in an array. You can modify this script to store the data in a database
# or whatever your purpose is. THIS script uses the data only to generate a
# PNG with a 2D view from top of the galaxy.
#
# The algorithm used to generate the galaxy is borrowed from Ben Motz
# <[email protected]>. The original C source code for DOS (including a 3D
# viewer) can be downloaded here:
#
# http://bits.bristol.ac.uk/motz/tep/galaxy.html
#
# Unfortunately, the original python code has been lost to time and a lack of wanting-to- search-through-several-hundred-webpages-for-one-webarchive-page. Sorry, original python guy.
#
# A fair portion of the revisions and code is from /u/_Foxtrot_ on reddit. They are much better with the python-fu than I!
#
from PIL import Image
from PIL import ImageDraw
import random
import math
import sys
# Generation parameters:
# raw_input the user's desired values
# Background color of the created PNG
PNGBGCOLOR = (0, 0, 0)
# Quick Filename
RAND = random.randrange(0, 108000000000)
# ---------------------------------------------------------------------------
NAME = raw_input('Galaxy Name:')
NUMC = int(raw_input('Number of Globular Clusters other than Central <Default:0>:') or "1")
NUMSTR = int(raw_input('Number of Stars <Default:2000>:') or "2000")
NUMCLUSA = NUMSTR / 70
NUMCLUS = int(raw_input('Number of Stars in each Cluster <Default:Stars / 70>:') or str(NUMCLUSA))
DISCLUSA = NUMCLUS / 4
DISCLUS = int(raw_input('Distribution of Star Number in each Cluster <Default: Avg/ 4>:') or str(DISCLUSA))
GALX = float(raw_input('X Length of Galaxy <Default:90.0>:') or "90.0")
GALY = float(raw_input('Y Length of Galaxy <Default:90.0:') or "90.0")
GALZ = float(raw_input('Maximum Depth of Galaxy <Default:16.0>:') or "16.0")
CLUSRADA = GALX / 12
CLUSRAD = float(raw_input('Radius of each cluster <Default:Galaxy / 12>:') or str(CLUSRADA))
DISCLRADA = CLUSRAD / 5
DISCLRAD = float(raw_input('Distribution of Cluster Radius <Default:Avg / 5>:') or str(DISCLRADA))
PNGSIZE = float(raw_input('X and Y Size of PNG <Default:1200>:') or "1200")
PNGFRAME = float(raw_input('PNG Frame Size <Default:50>:') or "50")
stars = []
clusters = []
star_color_dict = {
0: (229, 30, 30),
1: (203, 30, 26),
2: (181, 18, 6),
3: (200, 39, 13),
4: (200, 63, 21),
5: (222, 137, 10),
6: (212, 178, 42),
7: (210, 188, 38),
8: (217, 207, 66),
9: (222, 226, 125),
10: (222, 226, 160),
11: (255, 255, 253),
12: (255, 255, 255),
13: (253, 255, 255),
14: (250, 255, 255),
15: (222, 243, 255),
16: (222, 243, 255),
17: (230, 243, 255),
18: (140, 176, 255),
19: (140, 176, 225)
}
SGX = GALX * 0.2
SGY = GALY * 0.2
SCRAD = CLUSRAD * 0.06
NUMCLUSA = NUMCLUS - DISCLUS
NUMCLUSB = NUMCLUS + DISCLUS
CLUSRADA = CLUSRAD - DISCLRAD
CLUSRADB = CLUSRAD + DISCLRAD
NUMCB = NUMC + 1
def generateClusters():
c = 0
while c < NUMCB:
# random distance from centre
dist = random.uniform(CLUSRAD, (GALX))
# any rotation- clusters can be anywhere
theta = random.random() * 360
cx = math.cos(theta * math.pi / 180.0) * dist
cy = math.sin(theta * math.pi / 180.0) * dist
cz = random.random() * GALZ * 2.0 - GALZ
rad = random.uniform(CLUSRADA, CLUSRADB)
num = random.uniform(NUMCLUSA, NUMCLUSB)
# add cluster to clusters array
clusters.append((cx, cy, cz, rad, num))
# process next
c = c+1
sran = 0
cran = 0
def generateStars():
# Now generate the Hub. This places a point on or under the curve
# maxHubZ - s d^2 where s is a scale factor calculated so that z = 0 is
# at maxHubR (s = maxHubZ / maxHubR^2) AND so that minimum hub Z is at
# maximum disk Z. (Avoids edge of hub being below edge of disk)
scale = GALZ / (GALX * GALY)
i = 0
while i < NUMSTR:
# Choose a random distance from center
distX = random.randrange(0, GALX)
distY = random.randrange(0, GALY)
distXb = distX + random.uniform(0,SGX)
distYb = distY + random.uniform(0,SGY)
# Any rotation (points are not on arms)
theta = random.random() * 360
# Convert to cartesian
x = math.cos(theta * math.pi / 180.0) * distXb
y = math.sin(theta * math.pi / 180.0) * distYb
z = (random.random() * 2 - 1) * (GALZ - scale * distXb * distYb)
# Replaces the if/elif logic with a simple lookup. Faster and
# and easier to read.
scol = star_color_dict[random.randrange(0,19)]
# Add star to the stars array
stars.append((x, y, z, scol))
# Process next star
i = i + 1
sran = 0
c = 0
while c < NUMCB:
for (cx, cy, cz, rad, num) in clusters:
scale = rad / (rad * rad)
i = 0
while i < num:
dist = random.uniform(-rad,rad)
distb = dist + random.uniform(0,SCRAD)
theta = random.random() * 360
# Cartesian!
x = cx + (math.cos(theta * math.pi / 180) * distb)
y = cy + (math.sin(theta * math.pi / 180) * distb)
z = (random.random() * 2 - 1) * ((cz + rad) - scale * distb * distb)
scol = star_color_dict[random.randrange(0,19)]
stars.append((x, y, z, scol))
i = i + 1
sran = 0
c = c+1
def drawToPNG(filename):
image = Image.new("RGB", (int(PNGSIZE), int(PNGSIZE)), PNGBGCOLOR)
draw = ImageDraw.Draw(image)
# Find maximal star distance
max = 0
for (x, y, z, scol) in stars:
if abs(x) > max: max = x
if abs(y) > max: max = y
if abs(z) > max: max = z
# Calculate zoom factor to fit the galaxy to the PNG size
factor = float(PNGSIZE - PNGFRAME * 2) / (max * 2)
for (x, y, z, scol) in stars:
sx = factor * x + PNGSIZE / 2
sy = factor * y + PNGSIZE / 2
draw.point((sx, sy), fill=scol)
# Save the PNG
image.save(filename)
print filename
# Generate the galaxy
generateClusters()
generateStars()
# Save the galaxy as PNG to galaxy.png
drawToPNG("irregulargalaxy" + str(RAND) + "-" + str(NAME) + ".png")
# Create the galaxy's data galaxy.txt
with open("irregulargalaxy" + str(RAND) + "-" + str(NAME) + ".txt", "w") as text_file:
text_file.write("Galaxy Number: {}".format(RAND))
text_file.write("Galaxy Name: {}".format(NAME))
text_file.write("Number of Clusters: {}".format(NUMC))
text_file.write("Stars: {}".format(NUMSTR))
text_file.write("Number of Stars per Cluster {}".format(NUMCLUS))
text_file.write("Star Number Distribution per Cluster {}".format(DISCLUS))
text_file.write("Galaxy X Length: {}".format(GALX))
text_file.write("Galaxy Y Length: {}".format(GALY))
text_file.write("Galaxy Z Length: {}".format(GALZ))
text_file.write("Cluster Radius: {}".format(CLUSRAD))
text_file.write("Cluster Radius Distribution: {}".format(DISCLRAD))
text_file.write("Image Size: {}".format(PNGSIZE))
text_file.write("Frame Size: {}".format(PNGFRAME))