class Bullet:
def __init__(self, (from_x, from_y), (to_x, to_y)):
self.pos = Vector2(from_x, from_y)
self.destination = Vector2(to_x, to_y)
self.heading = Vector2.from_points(self.pos, self.destination)
self.heading.normalize()
self.speed = 500 #pixels per second
self.total_distance = 0
self.sprite = pygame.image.load(
'../images/bullet_lvl_2.png').convert_alpha()
w, h = self.sprite.get_size()
if w > 10:
ratio = 10. / w
h = int(h * ratio)
self.sprite = pygame.transform.scale(self.sprite, (10, h))
self.rotation = 0
to_x = to_x - from_x
to_y = (to_y - from_y) * -1
if to_x != 0:
angle = atan(to_y / to_x) / (pi / 180.)
else:
angle = -90
if to_x < 0:
angle += 180.
if to_x >= 0 and to_y < 0:
angle += 360.
self.rotation = angle - 90
self.pos += self.heading * 100 #dodaje dlugos lugy
self.rotated_sprite = pygame.transform.rotate(self.sprite,
self.rotation)
w, h = self.rotated_sprite.get_size()
self.draw_pos = Vector2(self.pos.x - w / 2, self.pos.y - h / 2)
def move(self, time_passed_seconds, speed):
dv = Vector2(self.destination)
lv = Vector2(self.rect.x, self.rect.y)
heading = Vector2.from_points(lv, dv)
heading.normalize()
d = heading * time_passed_seconds * speed
self.rect.move_ip(round(d.x), round(d.y))
def move(self, time_passed_seconds, speed):
dv = Vector2(self.destination)
lv = Vector2(self.rect.x, self.rect.y)
heading = Vector2.from_points(lv, dv)
heading.normalize()
d = heading * time_passed_seconds * speed
self.rect.move_ip(round(d.x), round(d.y))
def start(self) -> None:
y_direction = randint(0, self.screen_rect.bottom)
x_direction = randint(0, self.screen_rect.right)
destination = Vector2(x_direction, y_direction) - (Vector2(5, 5) / 2)
heading = Vector2.from_points(self.screen_rect.center, destination)
heading.normalize()
self.ball.direction = heading
self.game_state = GameState.RUNNING
self.started_at = datetime.now()
def update(self, delta):
if self.last_location:
self.last_vector = Vector2.from_points(self.last_location, (self.rect.x, self.rect.y))
self.rect.move_ip((self.randirx, self.randiry))
center = self.rect.center
self.image = pygame.transform.rotate(self.original, self.rotation)
self.rect = self.image.get_rect(center=center)
self.bounding = self.rect.inflate(-self.rect.width/2.25, -self.rect.height/2.25)
self.last_location = (self.rect.x, self.rect.y)
def _calculate_destination(self, mouse_pos):
"""
Figure out the destination coords for the bullet, starting from the
center of the screen through the point the player click, to the edge
of the screen.
"""
dx,dy = mouse_pos
step = Vector2.from_points((WINDOWWIDTH/2,WINDOWHEIGHT/2),
(dx,dy)) * 0.1
while True:
if dx > WINDOWWIDTH or dy > WINDOWHEIGHT or dx < 0 or dy < 0:
break
dx += step.x
dy += step.y
return (dx, dy)
def _calculate_destination(self, mouse_pos):
"""
Figure out the destination coords for the bullet, starting from the
center of the screen through the point the player click, to the edge
of the screen.
"""
dx, dy = mouse_pos
step = Vector2.from_points((WINDOWWIDTH / 2, WINDOWHEIGHT / 2),
(dx, dy)) * 0.1
while True:
if dx > WINDOWWIDTH or dy > WINDOWHEIGHT or dx < 0 or dy < 0:
break
dx += step.x
dy += step.y
return (dx, dy)
background = pygame.image.load(background_image_filename).convert()
sprite = pygame.image.load(sprite_image_filename).convert_alpha()
clock = pygame.time.Clock()
position = Vector2(100.0, 100.0)
heading = Vector2()
destination = Vector2()
speed = 200
while True:
for event in pygame.event.get():
if event.type == QUIT:
exit()
pressed_mouse = pygame.mouse.get_pressed()
if pressed_mouse[2]:
destination = Vector2( *pygame.mouse.get_pos() ) - Vector2( *sprite.get_size() )/2
vector_to_mouse = Vector2.from_points(position, destination)
vector_to_mouse.normalize()
heading = (vector_to_mouse * speed)
if destination.eq(position):
heading = Vector2()
screen.blit(background, (0,0))
screen.blit(sprite, position)
time_passed = clock.tick(60)
time_passed_seconds = time_passed / 1000.0
position += heading * time_passed_seconds
pygame.display.update()
from vector2 import Vector2
from pygame.locals import *
pygame.init()
screen = pygame.display.set_mode((640, 480), 0, 32)
sprite = pygame.image.load("images/play.png").convert_alpha()
clock = pygame.time.Clock()
position = Vector2(100.0, 100.0)
speed = 250
heading = Vector2()
while True:
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
exit()
destination = Vector2(
*pygame.mouse.get_pos()) - (Vector2(*sprite.get_size()) / 2)
heading = Vector2.from_points(position, destination)
heading.normalize()
screen.blit(sprite, (int(position.x), int(position.y)))
time_passed = clock.tick()
time_passed_seconds = time_passed / 1000.0
distance_moved = time_passed_seconds * speed
position += heading * distance_moved
pygame.display.update()
time.sleep(0.01)
def go_to(self, x, y):
actual = (self.x, self.y)
to = (x, y)
self.direction = Vector.from_points(actual, to)
self.direction.normalise()
print self.direction.x
def get_dir(self,leaf,pos): self.direction=Vector2.from_points(pos,leaf) self.magnitude=self.direction.get_magnitude() self.direction.normalize()
position = Vector2(100.0, 100.0)
heading = Vector2()
while True:
for event in pygame.event.get():
if event.type == QUIT:
exit()
screen.blit(background, (0,0))
screen.blit(sprite, position)
time_passed = clock.tick(100)
time_passed_seconds = time_passed / 1000.0
# 参数前面加*意味着把列表或元组展开
destination = Vector2( *pygame.mouse.get_pos() ) - Vector2( *sprite.get_size() )
# 计算鱼儿当前位置到鼠标位置的向量
vector_to_mouse = Vector2.from_points(position, destination)
# 向量规格化
vector_to_mouse.normalize()
# 这个heading可以看做是鱼的速度，但是由于这样的运算，鱼的速度就不断改变了
# 在没有到达鼠标时，加速运动，超过以后则减速。因而鱼会在鼠标附近晃动。
heading = heading + (vector_to_mouse * .6)
# position=heading + (vector_to_mouse * time_passed_seconds)
position += heading * time_passed_seconds
# position +=vector_to_mouse*0.5
pygame.display.update()
