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
|
"""Rendering classes and helper functions."""
from __future__ import division
import color
import random
import constants
from constants import *
import math
from show import Show
class Sun(object):
"""Object displayed on the bridge, probably a fish."""
def __init__(self):
"""Create fish with default parameters."""
self.center_x = 140
self.center_y = -5
self.width = 30
self.height = 5
self.wait = 0
def update(self):
"""Swim gently to the other side of the bridge."""
self.center_y += 0.005
if self.center_y >= 1:
self.center_y = 1
self.wait += 1
if self.wait >= 200:
self.wait = 0
self.center_y = -5
def color_at(self, x, y):
ball_width = 15
if abs(x - self.center_x) < ball_width:
return color.RGB(1, 1, 1)
distance = abs(self.center_x - x)
start_hue = 58 / 360
end_hue = 41 / 360
start_sat = 0
end_sat = 0.92
sat = scale_with_clamp(distance, ball_width, 60, start_sat, end_sat)
hue = scale_with_clamp(distance, ball_width, 100, start_hue, end_hue)
return color.HSV(hue, sat, 1).to_RGB()
def scale_with_clamp(inp, min_inp, max_inp, min_out, max_out):
return (clamp(min_inp, inp, max_inp) - min_inp) / (max_inp - min_inp) * (max_out - min_out) + min_out
class Light(object):
"""Represent a bridge light and its state."""
def __init__(self, x, y, light):
"""Store all facts about a light."""
self.light = light
self.color = color.black
self.transitioning_to = self.color
self.step = 0
self.x = x
self.y = y
def update(self, sun):
"""Change color depending on where the fish is."""
self.light.setRGBRaw(*sun.color_at(self.x, self.y).components)
class SunriseShow(Show):
def init(self):
self.lights = [Light(x, y, self.bridge.get_light(x, y))
for y in xrange(self.bridge.HEIGHT)
for x in xrange(self.bridge.WIDTH)]
self.sun = Sun()
def update(self):
self.sun.update()
for light in self.lights:
light.update(self.sun)
def compute_coverage(fish, x, y):
"""Calculate the coverage of a fish over a box."""
middle_of_fish = fish.x + fish.width / 2
middle_of_panel = x + 0.5
diff = abs(middle_of_fish - middle_of_panel) / (fish.width / 2)
scale = 1 - diff
min_x = min(max(x, fish.x), x + 1)
max_x = max(min(x+1, fish.x + fish.width), x)
min_y = min(max(y, fish.y), y + 1)
max_y = max(min(y+1, fish.y + fish.height), y)
coverage = (max_x - min_x) * (max_y - min_y)
return coverage * scale
def pick_HSV():
"""Return a random color in an appropriate interval."""
hue = random.random() * (constants.MAX_HUE - constants.MIN_HUE) + constants.MIN_HUE
saturation = random.random() * (MAX_SATURATION - MIN_SATURATION) + MIN_SATURATION
value = random.random() * (MAX_VALUE - MIN_VALUE) + MIN_VALUE
return color.HSV(hue, saturation, value)
def transition(start, end, step):
"""Return a vector equal to (end - start) * step + start."""
if start == end:
return start
diff_vector = end - start
step_vector = diff_vector / abs(diff_vector) * step
result = step_vector + start
return result
def random_change():
"""Return a random amount that a light should change each frame."""
min_time = int(constants.MIN_TIME * FRAME_RATE)
max_time = int(MAX_TIME * FRAME_RATE)
return 1 / random.randint(min_time, max_time)
def clamp(low, x, high):
"""Return v such that low <= v <= high and |x - v| is minimal."""
return max(low, min(x, high))
|
