def create_player_tank(dispatcher, atlas, x, y):
# Creating the actual entity, which currently has only a name
player = Entity(id='player')
# Adding all necessary components, in our case input (which also spawns
# bullets), two collision-related ones, position, health and a destructor
# for orderly entity removal.
player.add_component(InputComponent(dispatcher))
player.add_component(WalkerCollisionComponent(dispatcher))
player.add_component(PassingComponent(dispatcher))
player.add_component(PositionComponent(dispatcher, x, y))
player.add_component(DestructorHealthComponent(dispatcher, hitpoints=5))
player.add_component(DestructorComponent(dispatcher))
# Also a WidgetComponent, which requires a Widget
images_dict = {
'player_r': atlas.get_element('player_r'),
'player_l': atlas.get_element('player_l'),
'player_d': atlas.get_element('player_d'),
'player_u': atlas.get_element('player_u')
}
player.add_component(
SwitchWidgetComponent(
dispatcher,
SwitchingWidget(images_dict=images_dict,
initial_image='player_r')))
dispatcher.add_event(BearEvent('ecs_create', player))
dispatcher.add_event(
BearEvent('ecs_add',
(player.id, player.position.x, player.position.y)))
return player
def on_event(self, event):
if event.event_type == 'tick':
self.x_waited += event.event_value
self.y_waited += event.event_value
xpos, ypos = self.parent.widget_locations[self].pos
self.vx += self.field[xpos][ypos].ax * event.event_value
self.vy += self.field[xpos][ypos].ay * event.event_value
if self.vx != 0:
self.x_delay = abs(1 / self.vx)
if self.vy != 0:
self.y_delay = abs(1 / self.vy)
if self.x_waited >= self.x_delay and self.vx != 0:
new_x = xpos + round(self.vx/abs(self.vx))
self.x_waited = 0
else:
new_x = xpos
if self.y_waited >= self.y_delay and self.vy != 0:
new_y = ypos + round(self.vy/abs(self.vy))
self.y_waited = 0
else:
new_y = ypos
if new_x != xpos or new_y != ypos:
t = self.tetris.check_move((new_x, new_y), self.chars)
if t == 0:
self.parent.move_widget(self, (new_x, new_y))
elif t == 1:
return [BearEvent(event_type='request_installation',
event_value=self),
BearEvent(event_type='play_sound',
event_value='connect')]
elif t == 2:
return [BearEvent(event_type='request_destruction',
event_value=self),
BearEvent(event_type='play_sound',
event_value='fly_away')]
def create_enemy_tank(dispatcher, atlas, entity_id, x, y):
# ControllerComponent
# DestructorHealthComponent
# WalkerCollisionComponent
# SwitchWidgetComponent
enemy = Entity(id=entity_id)
# Adding all necessary components, in our case input (which also spawns
# bullets), two collision-related ones, position, health and a destructor
# for orderly entity removal.
enemy.add_component(WalkerCollisionComponent(dispatcher))
enemy.add_component(PassingComponent(dispatcher))
enemy.add_component(PositionComponent(dispatcher, x, y))
enemy.add_component(DestructorHealthComponent(dispatcher, hitpoints=1))
enemy.add_component(DestructorComponent(dispatcher))
enemy.add_component(ControllerComponent(dispatcher))
# Also a WidgetComponent, which requires a Widget
images_dict = {
'enemy_r': atlas.get_element('enemy_r'),
'enemy_l': atlas.get_element('enemy_l'),
'enemy_d': atlas.get_element('enemy_d'),
'enemy_u': atlas.get_element('enemy_u')
}
enemy.add_component(
SwitchWidgetComponent(
dispatcher,
SwitchingWidget(images_dict=images_dict, initial_image='enemy_r')))
dispatcher.add_event(BearEvent('ecs_create', enemy))
dispatcher.add_event(
BearEvent('ecs_add', (enemy.id, enemy.position.x, enemy.position.y)))
return enemy
def create_wall(dispatcher, atlas, entity_id, x, y):
wall = Entity(entity_id)
wall.add_component(PositionComponent(dispatcher, x, y))
wall.add_component(CollisionComponent(dispatcher))
wall.add_component(PassingComponent(dispatcher))
wall.add_component(DestructorComponent(dispatcher))
images_dict = {
'wall_3': atlas.get_element('wall_3'),
'wall_2': atlas.get_element('wall_2'),
'wall_1': atlas.get_element('wall_1')
}
wall.add_component(
SwitchWidgetComponent(
dispatcher,
SwitchingWidget(images_dict=images_dict, initial_image='wall_3')))
wall.add_component(
VisualDamageHealthComponent(dispatcher,
hitpoints=3,
widgets_dict={
3: 'wall_3',
2: 'wall_2',
1: 'wall_1'
}))
dispatcher.add_event(BearEvent('ecs_create', wall))
dispatcher.add_event(
BearEvent('ecs_add', (wall.id, wall.position.x, wall.position.y)))
pass
def on_event(self, event):
"""
See class documentation
:param event: BearEvent instance
"""
r = []
if event.event_type == 'ecs_move':
entity_id, x, y = event.event_value
# Checking if collision events need to be emitted
# Check for collisions with border
if x < 0 or x + self.entities[entity_id].widget.size[0]\
> len(self.chars[0]) or y < 0 or \
y + self.entities[entity_id].widget.size[1] > len(self.chars):
r.append(
BearEvent(event_type='ecs_collision',
event_value=(entity_id, None)))
else:
# Apparently no collision with a border, can safely move
self.move_child(self.widgets[entity_id], (x, y))
self.need_redraw = True
collided = set()
for y_offset in range(self.entities[entity_id].widget.size[1]):
for x_offset in range(
self.entities[entity_id].widget.size[0]):
for other_widget in self._child_pointers[y+y_offset] \
[x+x_offset]:
# Child_pointers is ECS-agnostic and stores pointers
# to the actual widgets
collided.add(other_widget)
collided_ent_ids = set()
for child in self.entities:
if child != entity_id and \
self.entities[child].widget.widget in collided:
collided_ent_ids.add(child)
for child in collided_ent_ids:
r.append(BearEvent('ecs_collision', (entity_id, child)))
elif event.event_type == 'ecs_create':
self.add_entity(event.event_value)
self.need_redraw = True
elif event.event_type == 'ecs_destroy':
self.remove_entity(event.event_value)
self.need_redraw = True
elif event.event_type == 'ecs_remove':
self.remove_child(self.entities[event.event_value].widget.widget)
self.need_redraw = True
elif event.event_type == 'ecs_add':
entity_id, x, y = event.event_value
self.add_child(self.widgets[entity_id], (x, y))
self.need_redraw = True
elif event.event_type == 'ecs_update':
# Some widget has decided it's time to redraw itself
self.need_redraw = True
elif event.event_type == 'service' and event.event_value == 'tick_over'\
and self.need_redraw:
self._rebuild_self()
self.terminal.update_widget(self)
self.need_redraw = False
if r:
return r
def on_event(self, event):
r = []
if event.event_type == 'key_down':
moved = False
if event.event_value in ('TK_D', 'TK_RIGHT'):
self.last_move = (1, 0)
moved = True
elif event.event_value in ('TK_A', 'TK_LEFT'):
self.last_move = (-1, 0)
moved = True
elif event.event_value in ('TK_S', 'TK_DOWN'):
self.last_move = (0, 1)
moved = True
elif event.event_value in ('TK_W', 'TK_UP'):
self.last_move = (0, -1)
moved = True
if moved:
# events
self.relative_move(*self.last_move, emit_event=False)
r.append(
BearEvent(event_type='ecs_move',
event_value=(self.owner.id, self.x, self.y)))
r.append(BearEvent(event_type='play_sound',
event_value='step'))
x = super().on_event(event)
if x:
if isinstance(x, BearEvent):
r.append(x)
else:
#multiple return
r += x
return r
def create_spawner_house(dispatcher, atlas, x, y):
house = Entity('house')
house.add_component(
WidgetComponent(dispatcher, Widget(*atlas.get_element('spawner'))))
house.add_component(DestructorComponent(dispatcher))
house.add_component(PositionComponent(dispatcher, x, y))
dispatcher.add_event(BearEvent('ecs_create', house))
dispatcher.add_event(
BearEvent('ecs_add', (house.id, house.position.x, house.position.y)))
def on_event(self, event):
super().on_event(event)
if event.event_type == 'tick':
self.have_waited += event.event_value
if self.have_waited >= self.delay:
pos = self.terminal.widget_locations[self].pos
if self.vx != 0:
new_x = pos[0]+round(abs(self.vx)/self.vx)
else:
new_x = pos[0]
if self.vy != 0:
new_y = pos[1]+round(abs(self.vy)/self.vy)
else:
new_y = pos[1]
self.terminal.move_widget(self, (new_x, new_y))
# The emitter always moves clockwise
# So some stuff is hardcoded
if new_x == 0 and self.vx < 0:
#Lower left
self.vx = 0
self.vy = -1 * self.abs_vy
self.delay = 1/self.abs_vy
elif new_y == 0 and self.vy < 0:
# Upper left
self.vy = 0
self.vx = self.abs_vx
self.delay = 1/self.abs_vx
elif new_x + self.width == 60 and self.vx > 0:
#Upper right
self.vx = 0
self.vy = self.abs_vy
self.delay = 1/self.abs_vy
elif new_y + self.height == 45 and self.vy > 0:
# Lower right
self.vx = -1 * self.abs_vx
self.vy = 0
self.delay = 1/self.abs_vx
self.have_waited = 0
for x_offset in range(5):
for y_offset in range(5):
if self.tetris[pos[0]+x_offset][pos[1]+y_offset] == 1:
return [BearEvent(event_type='game_lost',
event_value=None),
BearEvent(event_type='play_sound',
event_value='fail')]
elif event.event_type == 'request_installation' or \
event.event_type == 'request_destruction':
pos = self.terminal.widget_locations[self].pos
self.fig = self.children[1]
# The number 7 is empirical; maybe I'll change it later
self.fig.vx = (30 - pos[0])/7
self.fig.vy = (23-pos[1])/7
self.remove_child(self.fig, remove_completely=True)
self.dispatcher.register_listener(self.fig, 'tick')
self.terminal.add_widget(self.fig, (pos[0]+1, pos[1]+1), layer=6)
self.add_child(self.manager.create_figure(), (1, 1))
def test_tick_events(event_dispatcher, listener):
# Check that event_dispatcher does indeed emit test events
event_dispatcher.register_listener(listener, event_types=['tick', 'input'])
event_dispatcher.start_queue()
event_dispatcher.add_event(BearEvent(event_type='tick'))
event_dispatcher.add_event(BearEvent(event_type='input', event_value='A'))
event_dispatcher.dispatch_events()
assert 'tick' in listener.accepted_types
assert 'service' not in listener.accepted_types
assert 'input' in listener.accepted_types
def _run_iteration(self, time_since_last_tick):
# Get input events, if any
for event in self.terminal.check_input():
self.queue.add_event(event)
self.queue.add_event(BearEvent(event_type='tick',
event_value=time_since_last_tick))
self.queue.dispatch_events()
# Sending "Tick over" event, reminding widgets to update themselves
self.queue.add_event(BearEvent(event_type='service',
event_value='tick_over'))
self.queue.dispatch_events()
self.terminal.refresh()
def create_bullet(dispatcher, entity_id, x, y, vx, vy):
bullet = Entity(entity_id)
bullet.add_component(
WidgetComponent(dispatcher, Widget([['*']], [['red']])))
bullet.add_component(PositionComponent(dispatcher, x, y, vx, vy))
bullet.add_component(ProjectileCollisionComponent(dispatcher, damage=1))
bullet.add_component(DestructorComponent(dispatcher))
dispatcher.add_event(BearEvent('ecs_create', bullet))
dispatcher.add_event(
BearEvent('ecs_add',
(bullet.id, bullet.position.x, bullet.position.y)))
return bullet
def create_barrel(atlas, dispatcher, x, y):
barrel_entity = Entity(id='Barrel')
widget = SimpleAnimationWidget(Animation(
(atlas.get_element('barrel_1'), atlas.get_element('barrel_2')), 2),
emit_ecs=True)
widget_component = WidgetComponent(dispatcher, widget, owner=barrel_entity)
position_component = PositionComponent(dispatcher,
x=x,
y=y,
owner=barrel_entity)
collision = CollisionComponent(dispatcher, owner=barrel_entity)
dispatcher.add_event(
BearEvent(event_type='ecs_create', event_value=barrel_entity))
dispatcher.add_event(
BearEvent(event_type='ecs_add', event_value=('Barrel', x, y)))
def on_event(self, event):
if event.event_type == 'tick':
self.rotated_this_tick = False
self.move_cd -= event.event_value
self.shoot_cd -= event.event_value
if self.move_cd <= 0:
try:
player_x = EntityTracker().entities['player'].position.x
player_y = EntityTracker().entities['player'].position.y
except KeyError:
# DO NOTHING AFTER THE PLAYER IS DEAD
return
dx = player_x - self.owner.position.x
dy = player_y - self.owner.position.y
# Turn towards player if has direct line of fire
if abs(dx) < 3:
self.direction = (0, 1 if dy > 0 else -1)
self.owner.widget.switch_to_image(
self.images[self.direction])
if abs(dy) < 3:
self.direction = (1 if dx > 0 else -1, 0)
self.owner.widget.switch_to_image(
self.images[self.direction])
if self.direction is not None:
self.owner.position.relative_move(*self.direction)
# Shoot if necessary
if self.shoot_cd <= 0 and (abs(dx) < 3 or abs(dy) < 3):
offset = self.bullet_offsets[self.direction]
create_bullet(
self.dispatcher,
f'{self.owner.id}_bullet{self.bullet_count}',
self.owner.position.x + offset[0],
self.owner.position.y + offset[1],
self.direction[0] * 20, self.direction[1] * 20)
self.bullet_count += 1
self.shoot_cd = self.shoot_delay
self.dispatcher.add_event(
BearEvent('play_sound', 'shot'))
else:
directions = [(0, 1), (0, -1), (1, 0), (-1, 0)]
if dx > 0:
directions.extend([(1, 0)] * int(dx / 10))
elif dx < 0:
directions.extend([(-1, 0)] * int(dx / -10))
if dy > 0:
directions.extend([(0, 1)] * int(dy / 10))
elif dy < 0:
directions.extend([(0, -1)] * int(dy / -10))
self.direction = choice(directions)
self.owner.widget.switch_to_image(
self.images[self.direction])
self.move_cd = self.move_delay
elif event.event_type == 'ecs_collision'\
and event.event_value[0] == self.owner.id \
and not self.rotated_this_tick:
if event.event_value[1] is None or hasattr(
EntityTracker().entities[event.event_value[1]],
'collision'):
self.direction = None
self.rotated_this_tick = True
def collided_into(self, entity):
if not entity:
self.owner.destructor.destroy()
elif hasattr(EntityTracker().entities[entity], 'collision'):
self.dispatcher.add_event(
BearEvent(event_type='ac_damage',
event_value=(entity, self.damage)))
self.owner.destructor.destroy()
def check_input(self):
"""
Check if terminal has input. If so, yield corresponding ``BearEvent``.
This method returns an iterator because it's possible there would be
more than one event in a single tick, eg when two buttons are pressed
simultaneously.
This method mostly just wraps bearlibterminal's input behaviour in
`events<foo.wyrd.name/en:bearlibterminal:reference:input>`_, with
a single exception: in bearlibterminal, when a key is pressed and held
for more than a single tick, it first emits key_down, then waits for
0.5 seconds. Then, if the key is not released, it assumes the key is
indeed held and starts spamming events every tick. This makes sense to
avoid messing up the typing (where a slow typist would get char
sequences like tthiisss).
Bearlibterminal, on the other hand, is meant mostly for games that
require more precise input timing. Therefore, it starts spamming
``key_down`` events immediately after the button is pressed and expects
widgets and listeners to mind their input cooldowns themselves.
:yields: BearEvent instances with ``event_type`` set to ``misc_input``, ``key_up`` or ``key_down``.
"""
while terminal.has_input():
# Process the input event
in_event = terminal.read()
if in_event in self.misc_input:
yield BearEvent('misc_input', self.misc_input[in_event])
elif in_event in self._down_codes:
self.currently_pressed.add(self._down_codes[in_event])
elif in_event in self._up_codes:
try:
self.currently_pressed.remove(self._up_codes[in_event])
except KeyError:
# It's possible that the button was pressed before launching
# the bear_hug app, and released now. Then it obviously
# couldn't be in self.currently_pressed, causing exception
pass
yield BearEvent('key_up', self._up_codes[in_event])
else:
raise BearException('Unknown input code {}'.format(in_event))
for key in self.currently_pressed:
yield BearEvent('key_down', key)
def check_input(self):
"""
Check if terminal has input. If so, yield corresponding ``BearEvent``.
This method returns an iterator because it's possible there would be
more than one event in a single tick, eg when two buttons are pressed
simultaneously.
:yields: BearEvent instances with ``event_type`` set to ``misc_input``, ``key_up`` or ``key_down``.
"""
while terminal.has_input():
# Process the input event
in_event = terminal.read()
if in_event in self.misc_input:
yield BearEvent('misc_input', self.misc_input[in_event])
elif in_event in self._down_codes:
yield BearEvent('key_down', self._down_codes[in_event])
elif in_event in self._up_codes:
yield BearEvent('key_up', self._up_codes[in_event])
else:
raise BearException('Unknown input code {}'.format(in_event))
def create_cop(atlas, dispatcher, x, y):
"""
Create a cop entity
:param dispatcher:
:return:
"""
cop_entity = Entity(id='cop')
t = Widget(*atlas.get_element('cop_r'))
widget = deserialize_widget(repr(t))
widget_component = WidgetComponent(dispatcher, widget, owner=cop_entity)
position_component = WalkerComponent(dispatcher,
x=x,
y=y,
owner=cop_entity)
collision = WalkerCollisionComponent(dispatcher, owner=cop_entity)
passing = PassingComponent(dispatcher,
shadow_pos=(0, 15),
shadow_size=(13, 3),
owner=cop_entity)
dispatcher.add_event(
BearEvent(event_type='ecs_create', event_value=cop_entity))
dispatcher.add_event(
BearEvent(event_type='ecs_add', event_value=('cop', x, y)))
def check_for_removal(self):
"""
Check if something is to be removed
:param pos:
:return:
"""
# Return events, so this is expected to be called by FigureManager's
# on_event. Later BuildingWidget will catch the event and update itself
# accordingly. Maybe also some sound emission or animation or something
r = []
for x in range(len(self.cells)-3):
for y in range(len(self.cells[0])-3):
# Check whether a given cell is a top-left corner of something
if self[x][y] == 1:
if x <= len(self.cells) - 7:
#Check whether this cell is left side of horizontal 7
h7 = True
for x_1 in range(1, 7):
if self[x + x_1][y] != 1:
h7 = False
if h7:
for x_1 in range(7):
self[x+x_1][y] = 0
r += [BearEvent(event_type='h7',
event_value=(x, y)),
BearEvent(event_type='play_sound',
event_value='explosion')]
if y <= len(self.cells[0]) - 7:
# Or a vertical 7
v7 = True
for y_1 in range(1, 7):
if self[x][y+y_1] != 1:
v7 = False
if v7:
for y_1 in range(1, 7):
self[x][y+y_1] = 0
r += [(BearEvent(event_type='v7',
event_value=(x, y))),
BearEvent(event_type='play_sound',
event_value='explosion')]
if x <= len(self.cells)-3 and y <= len(self.cells[0])-3:
sq = True
for x_1 in range(3):
for y_1 in range(3):
if self[x+x_1][y+y_1] != 1:
sq = False
if sq:
for x_1 in range(3):
for y_1 in range(3):
self[x+x_1][y+y_1] = 0
r += [BearEvent(event_type='square',
event_value=(x, y)),
BearEvent(event_type='play_sound',
event_value='explosion')]
return r
def destroy(self):
"""
Destroy this component's owner.
Unsubscribes owner and all its components from the queue and sends
'ecs_remove'. Then all components are deleted. Entity itself is left at
the mercy of garbage collector.
"""
self.dispatcher.add_event(BearEvent('ecs_destroy', self.owner.id))
self.is_destroying = True
# Destroys item on the 'tick_over', so that all
# existing events involving owner (including 'ecs_remove)' are processed
# normally, but unsubscribes it right now to prevent new ones from forming
for component in self.owner.components:
if component != self.name:
self.dispatcher.unregister_listener(
self.owner.__dict__[component])
def move(self, x, y, emit_event=True):
"""
Move the Entity to a specified position.
:param x: x
:param y: y
:param emit_event: If True, emit an 'esc_move' event. There are a few cases (ie setting the coordinates after the component is created, but before the entity is added to the terminal) where this is undesirable.
"""
# This attr is set so that the turn could be undone (for example, that's
# what WalkerCollision uses to avoid impossible steps).
self.last_move = (x - self._x, y - self._y)
self._x = x
self._y = y
if emit_event:
self.dispatcher.add_event(BearEvent(event_type='ecs_move',
event_value=(self.owner.id,
self._x,
self._y)))
def on_event(self, event):
x = super().on_event(event)
if isinstance(x, BearEvent):
r = [x]
elif isinstance(x, list):
r = x
else:
r = []
if event.event_type == 'key_down':
moved = False
if event.event_value == 'TK_SPACE':
bullet_offset = self.bullet_offsets[
self.owner.position.last_move]
create_bullet(self.dispatcher, f'bullet_{self.bullet_count}',
self.owner.position.x + bullet_offset[0],
self.owner.position.y + bullet_offset[1],
self.owner.position.last_move[0] * 20,
self.owner.position.last_move[1] * 20)
self.bullet_count += 1
self.dispatcher.add_event(BearEvent('play_sound', 'shot'))
elif event.event_value in ('TK_D', 'TK_RIGHT'):
move = (1, 0)
self.owner.widget.switch_to_image('player_r')
moved = True
elif event.event_value in ('TK_A', 'TK_LEFT'):
move = (-1, 0)
self.owner.widget.switch_to_image('player_l')
moved = True
elif event.event_value in ('TK_S', 'TK_DOWN'):
move = (0, 1)
self.owner.widget.switch_to_image('player_d')
moved = True
elif event.event_value in ('TK_W', 'TK_UP'):
move = (0, -1)
self.owner.widget.switch_to_image('player_u')
moved = True
if moved:
# Remembered for shots
self.direction = move
self.owner.position.relative_move(*move)
return r
def on_event(self, event):
"""
See class documentation.
:param event: BearEvent instance.
"""
# React to the events
r = []
if event.event_type == 'ecs_move':
entity_id, x, y = event.event_value
if entity_id not in self.entities or entity_id not in self.widgets:
# Silently ignore attempts to move nonexistent children
# Some entities may not be shown right now, but still have a
# PositionComponent that moves and emits events
return
# Checking if collision events need to be emitted
# Check for collisions with border
try:
if x < 0 or x + self.widgets[entity_id].width \
> len(self._child_pointers[0]) or y < 0 or \
y + self.widgets[entity_id].height > len(
self._child_pointers):
r.append(
BearEvent(event_type='ecs_collision',
event_value=(entity_id, None)))
else:
# Apparently no collision with a border, can safely move
try:
self.move_child(self.widgets[entity_id], (x, y))
except:
pass
self.need_redraw = True
except KeyError:
# In some weird cases 'ecs_move' events can be emitted after the
# entity got destroyed
return
elif event.event_type == 'ecs_create':
self.add_entity(event.event_value)
elif event.event_type == 'ecs_destroy':
self.remove_entity(event.event_value)
self.need_redraw = True
elif event.event_type == 'ecs_remove':
self.remove_child(self.entities[event.event_value].widget.widget)
self.need_redraw = True
elif event.event_type == 'ecs_add':
entity_id, x, y = event.event_value
self.add_child(self.widgets[entity_id], (x, y))
self.need_redraw = True
elif event.event_type == 'ecs_scroll_to':
try:
self.scroll_to(event.event_value)
self.need_redraw = True
except BearLayoutException:
pass
elif event.event_type == 'ecs_scroll_by':
try:
self.scroll_by(event.event_value)
self.need_redraw = True
except BearLayoutException:
pass
elif event.event_type == 'ecs_update':
# Some widget has decided it's time to redraw itself
self.need_redraw = True
elif event.event_type == 'service' and event.event_value == 'tick_over' \
and self.need_redraw:
self._rebuild_self()
self.terminal.update_widget(self)
self.need_redraw = False
if r:
return r
def process_hitpoint_update(self):
if self.hitpoints == 0 and hasattr(self.owner, 'destructor'):
# self.dispatcher.add_event(BearEvent('play_sound', 'explosion'))
self.dispatcher.add_event(BearEvent('play_sound', 'explosion'))
self.owner.destructor.destroy()
def init_game():
"""
Initalize all game variables and objects.
:return:
"""
global atlas
global field
global building
global tetris
global figures
global t
global attractor
global attractor2
global emitter
global initial_figure
global score
global loop
global dispatcher
field = GravityField((60, 45))
building = BuildingWidget((60, 45))
tetris = TetrisSystem((60, 45))
figures = FigureManager(field=field,
tetris=tetris,
dispatcher=dispatcher,
building=building,
atlas=atlas)
figures.register_terminal(t)
dispatcher.register_listener(
figures, ['request_destruction', 'request_installation'])
dispatcher.register_listener(building, ['square', 'h7', 'v7'])
sound = SoundListener({
'fly_away': 'Fly.wav',
'explosion': 'Explosion.wav',
'connect': 'Connect.wav',
'fail': 'Fail.wav'
})
dispatcher.register_listener(sound, 'play_sound')
# The construction's start
building.add_figure(
Widget([[' ', '*', ' '], ['*', '*', '*'], [' ', '*', ' ']],
[['blue', 'blue', 'blue'], ['blue', 'blue', 'blue'],
['blue', 'blue', 'blue']]),
pos=(29, 20))
tetris[30][20] = 1
tetris[29][21] = 1
tetris[30][21] = 1
tetris[31][21] = 1
tetris[30][22] = 1
# Emitter and attractors
attractor = Attractor(*atlas.get_element('attractor'),
field=field,
mass=150)
field.add_attractor(attractor, (10, 25))
attractor2 = Attractor(*atlas.get_element('attractor'),
field=field,
mass=150)
field.add_attractor(attractor2, (50, 25))
dispatcher.register_listener(attractor,
['misc_input', 'key_up', 'key_down'])
dispatcher.register_listener(attractor2,
['misc_input', 'key_up', 'key_down'])
emitter = EmitterWidget(*atlas.get_element('emitter'),
manager=figures,
dispatcher=dispatcher,
tetris=tetris)
dispatcher.register_listener(
emitter,
['tick', 'service', 'request_installation', 'request_destruction'])
initial_figure = figures.create_figure()
dispatcher.register_listener(initial_figure, 'tick')
score = ScoreCounter()
dispatcher.register_listener(score, ['h7', 'v7', 'square'])
# Adding stuff
t.add_widget(score, pos=(39, 47), layer=1)
t.add_widget(building, pos=(0, 0), layer=0)
t.add_widget(attractor, pos=(10, 25), layer=1)
t.add_widget(attractor2, pos=(50, 25), layer=3)
t.add_widget(emitter, pos=(40, 40), layer=4)
t.add_widget(initial_figure, pos=(25, 40), layer=6)
dispatcher.add_event(
BearEvent(event_type='request_destruction',
event_value=initial_figure))
def on_event(self, event):
if event.event_type == 'ecs_create':
entity = event.event_value
# if hasattr(entity, 'position') and hasattr(entity, 'collision'):
self.entities[entity.id] = entity
elif event.event_type == 'ecs_destroy':
del (self.entities[event.event_value])
if event.event_value in self.currently_tracked:
self.currently_tracked.remove(event.event_value)
elif event.event_type == 'ecs_remove':
if event.event_value in self.currently_tracked:
self.currently_tracked.remove(event.event_value)
elif event.event_type == 'ecs_add':
# Anything added to the screen should have position and widget
# But if it doesn't have CollisionComponent, it's not our problem
if hasattr(self.entities[event.event_value[0]], 'collision'):
self.currently_tracked.add(event.event_value[0])
elif event.event_type == 'ecs_move' \
and event.event_value[0] in self.currently_tracked:
# Only process collisions between entities; if a collision into the
# screen edge happens, it's the ECSLayout job to detect it
moved_id, x, y = event.event_value
moved_z = self.entities[moved_id].widget.z_level
moved_depth = self.entities[moved_id].collision.depth
moved_face = self.entities[moved_id].collision.face_position
moved_face_size = self.entities[moved_id].collision.face_size
moved_shift = self.entities[moved_id].collision.z_shift
if moved_face_size == (0, 0):
moved_face_size = self.entities[moved_id].widget.size
r = []
for other_id in self.currently_tracked:
other = self.entities[other_id]
if other_id == moved_id or not hasattr(other, 'position') \
or not hasattr(other, 'collision'):
continue
other_z = other.widget.z_level
other_depth = other.collision.depth
other_shift = other.collision.z_shift
if moved_z - moved_depth <= other_z and \
other_z - other_depth <= moved_z:
# Only check if two entities are within collidable z-levels
other_face = other.collision.face_position
other_face_size = other.collision.face_size
if other_face_size in ((0, 0), [0, 0]):
# The interaction is unclean, but it prevents running
# through this check every time something moves
other.collision.face_size = other.widget.size
z_range = (max(moved_z - moved_depth,
other_z - other_depth),
min(moved_z, other_z))
for z_level in range(z_range[0], z_range[1] + 1):
moved_pos = (x + moved_face[0] + moved_shift[0] *
(moved_z - z_level), y + moved_face[1] +
moved_shift[1] * (moved_z - z_level))
other_pos = (other.position.x + other_face[0] +
other_shift[0] * (other_z - z_level),
other.position.y + other_face[1] +
other_shift[1] * (other_z - z_level))
if rectangles_collide(moved_pos, moved_face_size,
other_pos, other_face_size):
r.append(
BearEvent('ecs_collision',
(moved_id, other_id)))
continue
return r
def on_event(self, event):
"""
See class documentation.
:param event: BearEvent instance.
"""
# React to the events
r = []
if event.event_type == 'ecs_move':
entity_id, x, y = event.event_value
# Checking if collision events need to be emitted
# Check for collisions with border
try:
if x < 0 or x + self.entities[entity_id].widget.size[0] \
> len(self._child_pointers[0]) or y < 0 or \
y + self.entities[entity_id].widget.size[1] > len(
self._child_pointers):
r.append(
BearEvent(event_type='ecs_collision',
event_value=(entity_id, None)))
else:
# Apparently no collision with a border, can safely move
self.move_child(self.widgets[entity_id], (x, y))
self.need_redraw = True
collided = set()
for y_offset in range(
self.entities[entity_id].widget.size[1]):
for x_offset in range(
self.entities[entity_id].widget.size[0]):
for other_widget in \
self._child_pointers[y + y_offset] \
[x + x_offset]:
# Child_pointers is ECS-agnostic and stores pointers
# to the actual widgets
collided.add(other_widget)
# TODO: optimize to avoid checking all entities in collision detector
# Probably just storing all entity ids along with child pointers
collided_ent_ids = set()
for child in self.entities:
if child != entity_id and \
self.entities[child].widget.widget in collided:
collided_ent_ids.add(child)
for child in collided_ent_ids:
r.append(BearEvent('ecs_collision',
(entity_id, child)))
except KeyError:
# In some weird cases 'ecs_move' events can be emitted after the
# entity got destroyed
return
elif event.event_type == 'ecs_create':
self.add_entity(event.event_value)
self.need_redraw = True
elif event.event_type == 'ecs_destroy':
self.remove_entity(event.event_value)
self.need_redraw = True
elif event.event_type == 'ecs_remove':
self.remove_child(self.entities[event.event_value].widget.widget)
self.need_redraw = True
elif event.event_type == 'ecs_add':
entity_id, x, y = event.event_value
self.add_child(self.widgets[entity_id], (x, y))
self.need_redraw = True
elif event.event_type == 'ecs_scroll_to':
try:
self.scroll_to(event.event_value)
self.need_redraw = True
except BearLayoutException:
pass
elif event.event_type == 'ecs_scroll_by':
try:
self.scroll_by(event.event_value)
self.need_redraw = True
except BearLayoutException:
pass
elif event.event_type == 'ecs_update':
# Some widget has decided it's time to redraw itself
self.need_redraw = True
elif event.event_type == 'service' and event.event_value == 'tick_over' \
and self.need_redraw:
self._rebuild_self()
self.terminal.update_widget(self)
self.need_redraw = False
if r:
return r