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
|
from __future__ import division
import color
from color import Vector
import random
import constants
from constants import *
import math
from show import Show
class Fish(object):
"""Object displayed on the bridge, probably a fish."""
def __init__(self, x, y, width, height, color, step):
"""Create fish with default parameters."""
self.x = x
self.y = y
self.width = width
self.height = height
self.color = color
self.speed = step
self.step = step
self.speed = Vector(0.1, 0)
self.drag = -0.09
self.tailAccelMag = 0.4
self.tailAcceleration = Vector(self.tailAccelMag, 0)
self.tailDuration = 2
self.tailMoving = False
self.tailThreshold = 0.7
self.tailMoveCount = 0
def update(self):
"""Swim gently to the other side of the bridge."""
self.speed += self.drag * self.speed
if abs(self.speed) < self.tailThreshold:
self.tailMoving = True
self.tailThreshold = rand_in_range(0.5, 1.4)
self.fix_direction()
if self.tailMoveCount > self.tailDuration:
self.tailMoveCount = 0
self.tailMoving = False
if self.tailMoving:
self.speed += self.tailAcceleration
self.tailMoveCount += 1
self.x += self.speed.components[0]
self.y += self.speed.components[1]
#
# THIS NEEDS TO CHANGE
#
if self.x > constants.BRIDGE_WIDTH:
self.x = -self.width
if self.x < -self.width:
self.x = constants.BRIDGE_WIDTH
print(self.x, self.y)
def fix_direction(self):
min_theta = -0.32
max_theta = 0.32
if self.y < 0:
min_theta = 0
if self.y > 1:
max_theta = 0
#theta = rand_in_range(min_theta, max_theta)
theta = random.gauss((max_theta+min_theta)/2, (max_theta - min_theta)/12)
self.tailAcceleration = Vector(self.tailAccelMag, 0).rot2d(theta)
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, fishes):
"""Change color depending on where the fish is."""
if abs(self.transitioning_to - self.color) <= self.step:
self.transitioning_to = pick_HSV().to_RGB()
self.step = (random_change()
* abs(self.color - self.transitioning_to))
new_background = transition(
self.color, self.transitioning_to, self.step
)
self.color = new_background
new_color = new_background
for fish in fishes:
coverage = compute_coverage(fish, self.x, self.y)
new_color = coverage * fish.color + (1 - coverage) * new_color
self.light.setRGBRaw(
*map(lambda x: clamp(0, x, 1), new_color.components)
)
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))
class FishShow(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)]
random_hue = random.random()
fish_color = color.HSV(random_hue, 1, 20/100).to_RGB()
self.fishes = [Fish(0, 0.5, 23, 1.5, fish_color, 1), Fish(100, 0.5, 23, 1.5, fish_color, 1)]
def update(self):
for fish in self.fishes:
fish.update()
for light in self.lights:
light.update(self.fishes)
def rand_in_range(low, high):
return random.random() * (high - low) + low
|
