如何模拟物体更真实的运动?

我正在写一个游戏环境,在这个环境中,一个人(工人)应该在区域内随机移动,直到它与绿色障碍物(定义为 pygame.draw.rect(screen, GREEN, [510,150,75,52]) 和 pygame.draw.rect(screen, GREEN, [450,250,68,40]) ).

到目前为止,我可以模拟一个工人的随机移动,但它的移动不知何故不规则且不平稳,在同一区域跳跃并缓慢地移动到右下角。

如何更新函数 create_randomPATH 支持屏幕区域内工人更真实流畅的移动?我试着把蜱虫的数量增加到70甚至更多( clock.tick(70) )正如在一个线程中指出的,但它似乎无法解决问题。

import pygame, random
import sys

WHITE = (255, 255, 255)
GREEN = (20, 255, 140)
GREY = (210, 210 ,210)
RED = (255, 0, 0)
PURPLE = (255, 0, 255)

SCREENWIDTH=1000
SCREENHEIGHT=578      

class Worker(pygame.sprite.Sprite):
    def __init__(self, image_file, location):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.image.load(image_file)
        self.rect = self.image.get_rect()
        self.rect.left, self.rect.top = location

    def create_randomPATH(self,x,y):
        randomX = random.randint(1,5)
        randomY = random.randint(1,5)
        if random.uniform(0,1)>0.5:
            valX = x  + randomX
            valY = y  + randomY
        else:
            valX = x  - randomX
            valY = y  - randomY   
        return valX, valY

class Background(pygame.sprite.Sprite):
    def __init__(self, image_file, location):
        pygame.sprite.Sprite.__init__(self)
        self.image = pygame.image.load(image_file)
        self.rect = self.image.get_rect()
        self.rect.left, self.rect.top = location

pygame.init()

size = (SCREENWIDTH, SCREENHEIGHT)
screen = pygame.display.set_mode(size)
screen_rect=screen.get_rect()
pygame.display.set_caption("TEST")

worker = Worker("worker.png", [0,0])
w_x = worker.rect.left
w_y = worker.rect.top

bg = Background("background.jpg", [0,0])

carryOn = True
clock=pygame.time.Clock()

while carryOn:
        for event in pygame.event.get():
            if event.type==pygame.QUIT:
                carryOn=False
                pygame.display.quit()
                pygame.quit()
                quit()

        # Draw floor layout 
        screen.blit(pygame.transform.scale(bg.image, (SCREENWIDTH, SCREENHEIGHT)), bg.rect)

        # Draw obstacles
        pygame.draw.rect(screen, GREEN, [510,150,75,52])
        pygame.draw.rect(screen, GREEN, [450,250,68,40])

        w_x,w_y = worker.create_randomPATH(w_x,w_y)

        # worker should not go outside the screen area
        worker.rect.clamp_ip(screen_rect)

        screen.blit(worker.image, (w_x,w_y))

        # Refresh Screen
        pygame.display.flip()

        clock.tick(5)

pygame.display.quit()
pygame.quit()
quit()