Issue with Kivy movement - python-3.x

Question

I've been trying to work this out for a while now. Below, is the python/kivy code for the early stages of a kivy app. The issue lies in player movement. Kivy is overcompensating the dx and dy movements and it is causing the player movement to constantly shake. I don't know how to fix this issue. Any ideas?
Note:
Much of this code is incomplete, but the player movement is mostly done. The movement issue is happening in the "Player" class.
EDIT: Here is what I tried following the advice of the post below
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()

Answer 1

In your player class, and within move(), before you update pos, you would check if the distance between pos and center is smaller than speed. if it is, then simply set pos to be equal to center. If it is not, then increment pos as you already do.