配套视频教程
项目代码
最终效果
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行走
constants.py
STAND = 'standing'
WALK = 'walk'
SMALL_ACCEL = .2
SMALL_TURNAROUND = .35
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玛丽类构造函数修改如下:
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玛丽类新增及修改
def update(self, keys):
self.handle_state(keys)
self.update_position()
self.animation()
def update_position(self):
self.rect.x += self.x_vel
self.rect.y += self.y_vel
def handle_state(self, keys):
if self.state == c.STAND:
self.standing(keys)
elif self.state == c.WALK:
self.walking(keys)
def animation(self):
if self.facing_right:
self.image = self.right_frames[self.frame_index]
else:
self.image = self.left_frames[self.frame_index]
def load_from_sheet(self):
self.right_frames.append(
self.get_image(178, 32, 12, 16)) # right
self.right_frames.append(
self.get_image(80, 32, 15, 16)) # right walking 1
self.right_frames.append(
self.get_image(99, 32, 15, 16)) # right walking 2
self.right_frames.append(
self.get_image(114, 32, 15, 16)) # right walking 3
self.right_frames.append(
self.get_image(144, 32, 16, 16)) # right jump
self.right_frames.append(
self.get_image(130, 32, 14, 16)) # right skid
# The left image frames are numbered the same as the right
# frames but are simply reversed.
for frame in self.right_frames:
new_image = pg.transform.flip(frame, True, False)
self.left_frames.append(new_image)
玛丽类新增
def standing(self, keys):
self.frame_index = 0
self.x_vel = 0
self.y_vel = 0
if keys[pg.K_LEFT]:
self.facing_right = False
self.state = c.WALK
elif keys[pg.K_RIGHT]:
self.facing_right = True
self.state = c.WALK
else:
self.state = c.STAND
def walking(self, keys):
if self.frame_index == 0:
self.frame_index += 1
else:
if self.frame_index < 3:
self.frame_index += 1
else:
self.frame_index = 1
if keys[pg.K_LEFT]:
self.facing_right = False
self.x_accel = c.SMALL_ACCEL
#向左速度是负的,如果没达到最小的负的速度,继续向左
# 比如 -3 > -4,那就继续减小
if self.x_vel > (self.max_x_vel * -1):
self.x_vel -= self.x_accel
elif keys[pg.K_RIGHT]:
self.facing_right = True
self.x_accel = c.SMALL_ACCEL
if self.x_vel < self.max_x_vel:
self.x_vel += self.x_accel
不抖
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能停
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转身和加速
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