-
Notifications
You must be signed in to change notification settings - Fork 26
/
physics.py
234 lines (189 loc) · 8.86 KB
/
physics.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
222
223
224
225
226
227
228
229
230
231
232
233
234
#!/usr/bin/python
# Physics, a 2D Physics Playground for Kids
# Copyright (C) 2008 Alex Levenson and Brian Jordan
# Copyright (C) 2012 Daniel Francis
# Copyright (C) 2012-13 Walter Bender
# Copyright (C) 2013 Sai Vineet
# Copyright (C) 2012-13 Sugar Labs
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
# Elements is Copyright (C) 2008, The Elements Team, <[email protected]>
# Wiki: http://wiki.sugarlabs.org/go/Activities/Physics
# Code: git://git.sugarlabs.org/physics/mainline.git
import os
from gi.repository import Gtk
from gi.repository import Gdk
import pygame
from pygame.locals import MOUSEBUTTONUP
import Box2D as box2d
import myelements as elements
import tools
class PhysicsGame:
def __init__(self, activity):
self.activity = activity
# Get everything set up
self.clock = pygame.time.Clock()
self.in_focus = True
# Create the name --> instance map for components
self.toolList = {}
for c in tools.allTools:
self.toolList[c.name] = c(self)
self.currentTool = self.toolList[tools.allTools[0].name]
# Set up the world (instance of Elements)
self.box2d = box2d
self.opening_queue = None
self.running = True
self.initialise = True
self.full_pos_list = []
self.tracked_bodies = 0
self.trackinfo = {}
self.box2d_fps = 50
def set_game_fps(self, fps):
self.box2d_fps = fps
def switch_off_fake_pygame_cursor_cb(self, panel, event):
self.show_fake_cursor = False
def switch_on_fake_pygame_cursor_cb(self, panel, event):
self.show_fake_cursor = True
def write_file(self, path):
# Saving to journal
self.world.add.remove_mouseJoint()
additional_data = {
'trackinfo': self.trackinfo,
'full_pos_list': self.full_pos_list,
'tracked_bodies': self.tracked_bodies
}
self.world.json_save(path, additional_data, serialize=True)
def read_file(self, path):
# Loading from journal
self.opening_queue = path
def check_queue(self):
if self.opening_queue:
path = self.opening_queue.encode('ascii', 'convert')
if os.path.exists(path):
self.world.json_load(path, serialized=True)
if 'full_pos_list' in self.world.additional_vars:
self.full_pos_list = \
self.world.additional_vars['full_pos_list']
if 'trackinfo' in self.world.additional_vars:
self.trackinfo = self.world.additional_vars['trackinfo']
if 'tracked_bodies' in self.world.additional_vars:
self.tracked_bodies = \
self.world.additional_vars['tracked_bodies']
def run(self):
if self.initialise:
self.initialise = False
# Fake a Sugar cursor for the pyGame canvas area
self.show_fake_cursor = True
pygame.mouse.set_cursor((8, 8), (0, 0), (0, 0, 0, 0, 0, 0, 0, 0),
(0, 0, 0, 0, 0, 0, 0, 0))
self.cursor_picture = pygame.image.load('standardcursor.png')
self.cursor_picture.convert_alpha()
self.canvas.connect('enter-notify-event',
self.switch_on_fake_pygame_cursor_cb)
self.canvas.connect('leave-notify-event',
self.switch_off_fake_pygame_cursor_cb)
self.canvas.add_events(Gdk.EventMask.ENTER_NOTIFY_MASK |
Gdk.EventMask.LEAVE_NOTIFY_MASK)
self.screen = pygame.display.get_surface()
self.world = elements.Elements(self.screen.get_size())
self.world.renderer.set_surface(self.screen)
self.world.add.ground()
self.check_queue()
while self.running:
# Pump GTK messages.
while Gtk.events_pending():
Gtk.main_iteration()
if not self.running:
break
# Pump PyGame messages.
for event in pygame.event.get():
if event.type == pygame.QUIT:
return
elif event.type == pygame.VIDEORESIZE:
pygame.display.set_mode(event.size, pygame.RESIZABLE)
self.currentTool.handleEvents(event)
if event.type == MOUSEBUTTONUP:
# if event.button == 1:
self.show_fake_cursor = True
if self.in_focus:
# Drive motors
if self.world.run_physics:
bodies_present = len(self.world.world.bodies)
clear_all_active = self.activity.clear_all.get_sensitive()
if (bodies_present > 2) and clear_all_active is False:
self.activity.clear_all.set_sensitive(True)
elif (bodies_present > 2) is False and \
clear_all_active is True:
self.activity.clear_all.set_sensitive(False)
poslist = self.full_pos_list
clear_trace_active = \
self.activity.clear_trace.get_sensitive()
if poslist:
if not poslist[0]:
if clear_trace_active:
self.activity.clear_trace.set_sensitive(False)
else:
if clear_trace_active is False:
self.activity.clear_trace.set_sensitive(True)
for key, info in self.trackinfo.items():
# [host_body, tracker, color, destroyed?]
body = info[1]
if info[3] is False: # Not destroyed the pen
trackdex = info[4]
def to_screen(pos):
px = self.world.meter_to_screen(
pos[0])
py = self.world.meter_to_screen(
pos[1])
py = self.world.renderer.get_surface() \
.get_height() - py
return (px, py)
x = body.position.x
y = body.position.y
tupled_pos = to_screen((x, y))
posx = tupled_pos[0]
posy = tupled_pos[1]
try:
self.full_pos_list[trackdex].append(posx)
self.full_pos_list[trackdex].append(posy)
except IndexError:
self.full_pos_list.append([posx, posy])
'''
for body in self.world.world.GetBodyList():
if isinstance(body.userData, dict):
if 'rollMotor' in body.userData:
rollmotor = body.userData['rollMotor']
diff = rollmotor['targetVelocity'] - \
body.GetAngularVelocity()
body.ApplyTorque(rollmotor['strength'] * \
diff * body.getMassData().I)
'''
# Update & Draw World
self.world.update(fps=self.box2d_fps)
self.screen.fill((240, 240, 240)) # #f0f0f0, light-grey
self.world.draw()
# Draw output from tools
self.currentTool.draw()
# Show Sugar like cursor for UI consistancy
if self.show_fake_cursor:
self.screen.blit(self.cursor_picture,
pygame.mouse.get_pos())
# Flip Display
pygame.display.flip()
# Stay < 30 FPS to help keep the rest of the platform responsive
self.clock.tick(30) # Originally 50
return False
def setTool(self, tool):
self.currentTool.cancel()
self.currentTool = self.toolList[tool]
self.currentTool.button_activated()
def get_activity(self):
return self.activity