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adds meridians with color gradient and an equator

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tosh 2013-03-27 17:05:23 +01:00
parent dde8b7dee5
commit 891194ed2e
1 changed files with 29 additions and 7 deletions
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36
interface/resources/gen_stars.py
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@ -12,16 +12,38 @@ from random import random,randint
from math import sqrt, hypot, atan2, pi, fmod, degrees
from sys import argv,stderr
hemisphere_only, equator, meridians= False, 1000, 1000
n = 10
n_random = 100000
if len(argv) > 1:
n = int(argv[1])
hemisphere=False
n_random = int(argv[1])
bars_total, bars_prev = 77, 0
for i in range(n):
def meridian(azimuth,n,(r0,g0,b0),(r1,g1,b1)):
alts = 180.0/n
for alti in range(n):
# color
altj = n-alti-1
r = (r0 *altj+alti* r1)/n
g = (g0 *altj+alti* g1)/n
b = (b0 *altj+alti* b1)/n
# position
altitude = alts*alti
print "%f %f #%02x%02x%02x" % (azimuth,altitude,r,g,b)
print "%f %f #%02x%02x%02x" % (azimuth,-altitude,r,g,b)
if meridians:
meridian(.2,meridians,(255,255,255), (180, 60,255)) # N->S
meridian(90,meridians,( 80,255, 80), (255,240, 40)) # E->W
if equator:
azis = 360.0/equator
for azii in range(equator):
azimuth = azis*azii
print "%f %f #%02x%02x%02x" % (azimuth,0,255,255,255)
for i in range(n_random):
# color
w = randint(30,randint(40,255))
r = max(0,min(255,w + randint(-10,70)))
@ -29,7 +51,7 @@ for i in range(n):
b = max(0,min(255,w + randint(-10,100)))
# position
x,y,z = random()*2-1,random(),random()*2-1
if not hemisphere:
if not hemisphere_only:
y = y*2-1
l = sqrt(x*x + y*y + z*z)
x /= l; y /= l; z /= l
@ -38,7 +60,7 @@ for i in range(n):
azimuth = degrees(fmod(atan2(x,z)+pi,2*pi))
altitude = degrees(atan2(y,xz))
bars = round(bars_total*i/n)
bars = round(bars_total*i/n_random)
if bars != bars_prev:
bars_prev = bars
bars = int(bars)