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我一直在努力解决这个问题。下面是 kivy 应用程序早期阶段的 python/kivy 代码。问题在于球员的运动。Kivy 过度补偿了 dx 和 dy 运动，导致玩家运动不断抖动。我不知道如何解决这个问题。有任何想法吗？

注意：这段代码的大部分内容是不完整的，但玩家的移动大部分已经完成。运动问题发生在 " Player" 类中。

编辑：这是我按照以下帖子的建议尝试的

import kivy
kivy.require('1.1.1')

from kivy.app import App
from kivy.uix.widget import Widget
from kivy.properties import ObjectProperty, ListProperty, NumericProperty
import math
from kivy.clock import Clock
import time
import random

PLAYER_SPEED = 10
ENEMY_SPAWN = 3
UPDATE_SPEED = .01
MIN_INITIAL_PLAYER_MINION_DISTANCE = 200

class Player(Widget):
    velocity_x = NumericProperty(0)
    velocity_y = NumericProperty(0)
    target = ListProperty([])
    speed = NumericProperty(PLAYER_SPEED)
    def __init__(self, **kwargs):
        Widget.__init__(self)
        self.target = [399.0, 399.0]
    def update_target(self, new_target):
        self.target = new_target
    def move(self):
        dx = self.target[0] - self.center[0]
        dy = self.target[1] - self.center[1]
        x_1 = self.pos[0] - self.center[0]
        y_1 = self.pos[1] - self.center[1]
        total = math.sqrt(dx ** 2 + dy**2)
        self.velocity_x = (dx / total) * self.speed
        self.velocity_y = (dy / total) * self.speed
        if math.sqrt(x_1** 2 + y_1**2) < self.speed:
            self.pos = self.center
        else:
            new_x = self.pos[0] + self.velocity_x
            new_y = self.pos[1] + self.velocity_y
            self.pos = (new_x,new_y)

class Enemy(Player):
    velocity_y = NumericProperty(PLAYER_SPEED)
    def __init__(self, **kwargs):
        Widget.__init__(self)
        self.center = kwargs.get('start_pos',[0,0])
    def move(self):
        self.pos = (self.pos[0], self.pos[1] + self.velocity_y)

def distance(widget1, widget2):
    dist = math.sqrt((widget1.pos[0]-widget2.pos[0])**2 + \
                     (widget1.pos[1]-widget2.pos[1])**2)
    return dist

class Game(Widget):
    player1 = ObjectProperty(None)
    enemies = ListProperty([])
    decoys = ListProperty([])
    def setup(self):
        self.enemies = []
        self.decoys = []
        self.player1.center = self.center
        self.setup_schedules()
    #Don't forget about good code organization!
    def setup_schedules(self):
        Clock.schedule_interval(self.update, UPDATE_SPEED)
        Clock.schedule_interval(self.spawn_enemy, ENEMY_SPAWN)

    def update(self,dt):
        self.player1.move()

    def spawn_enemy(self, dt):
        x = float(random.randint(0, self.width))
        y = float(random.randint(0, self.height))
        enemy = Enemy(start_pos = (x,y))
        while distance(enemy, self.player1)< MIN_INITIAL_PLAYER_MINION_DISTANCE:
            x = float(random.randint(0, self.width))
            y = float(random.randint(0, self.height))
            enemy.pos = (x,y)

        self.enemies.append(enemy)
        self.add_widget(enemy)

    def score(self):
        zero_score = time.time()
        player_score = zero_score + 1


    #on_touch_move vs on_touch_down
    def on_touch_move(self, touch):
        self.player1.update_target([touch.x, touch.y])

#Entry Point into app       
class GameApp(App):
    def build(self):
        game = Game()
        game.setup()        
        return game

def main():
    GameApp().run()
main()
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1 回答 1

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在您的player班级中move()，在您更新之前，您将检查和pos之间的距离是否小于。如果是，则只需设置为等于。如果不是，那么像你已经做的那样增加。poscenterspeedposcenterpos

于 2016-07-27T01:08:16.447 回答