python-3.x - Pygame 水物理没有按预期工作
问题描述
所以,我一直在尝试根据本教程在 pygame 中实现水物理
问题是,当我在 pygame 中实现这段代码时,水决定它不会产生很好的涟漪效应,而是会变得疯狂并在整个屏幕上摆动,直到最终崩溃。
我在一些不和谐的服务器上环顾四周,发现其他人试图实现同样的事情,并且遇到了同样的问题。他们的代码与我的基本相同,只是组织得更整齐,所以我会发布它而不是我的。
import pygame, random
import math as m
from pygame import *
pygame.init()
WINDOW_SIZE = (854, 480)
screen = pygame.display.set_mode(WINDOW_SIZE,0,32) # initiate the window
clock = pygame.time.Clock()
font = pygame.font.SysFont("Arial", 18)
class surface_water_particle():
def __init__(self, x,y):
self.x_pos = x
self.y_pos = y
self.target_y = y
self.velocity = 0
self.k = 0.02
self.d = 0.02
self.time = 1
def update(self):
x = -(self.target_y - self.y_pos)
a = -(self.k * x - self.d * self.velocity)
self.y_pos += self.velocity
self.velocity += a
class water():
def __init__(self, x_start, x_end, y_start, y_end, segment_length):
self.springs = []
self.x_start = x_start
self.y_start = y_start
self.x_end = x_end
self.y_end = y_end - 10
for i in range(abs(x_end - x_start) // segment_length):
self.springs.append(surface_water_particle(i * segment_length + x_start, y_end))
def update(self, spread):
for i in range(len(self.springs)):
self.springs[i].update()
leftDeltas = [0] * len(self.springs)
rightDeltas = [0] * len(self.springs)
for i in range(0, len(self.springs) ):
if i > 0:
leftDeltas[i] = spread * (self.springs[i].y_pos - self.springs[i - 1].y_pos)
self.springs[i - 1].velocity += leftDeltas[i]
if i < len(self.springs) - 1:
rightDeltas[i] = spread * (self.springs[i].y_pos - self.springs[i + 1].y_pos)
self.springs[i + 1].velocity += rightDeltas[i]
for i in range(0, len(self.springs) ):
if i > 0:
self.springs[i - 1].velocity += leftDeltas[i]
if i < len(self.springs) - 1:
self.springs[i + 1].velocity += rightDeltas[i]
def splash(self, index, speed):
if index > 0 and index < len(self.springs) :
self.springs[index].velocity = speed
def draw(self):
water_surface = pygame.Surface((abs(self.x_start - self.x_end), abs(self.y_start - self.y_end))).convert_alpha()
water_surface.fill((0,0,0,0))
water_surface.set_colorkey((0,0,0,0))
polygon_points = []
polygon_points.append((self.x_start, self.y_start))
for spring in range(len(self.springs)):
polygon_points.append((water_test.springs[spring].x_pos, water_test.springs[spring].y_pos))
polygon_points.append((water_test.springs[len(self.springs) - 1].x_pos, self.y_start))
#pygame.draw.polygon(water_surface, (0,0,255), polygon_points)
for spring in range(0,len(self.springs) - 1):
pygame.draw.line(screen, (0,0,255), (water_test.springs[spring].x_pos, water_test.springs[spring].y_pos), (water_test.springs[spring + 1].x_pos, water_test.springs[spring + 1].y_pos), 2)
#water_surface.set_alpha(100)
return water_surface
def update_fps():
fps_text = font.render(str(int(clock.get_fps())), 1, pygame.Color("coral"))
screen.blit(fps_text, (0,0))
water_test = water(0,800,200,80, 20)
while True:
screen.fill((255,255,255))
water_test.update(0.5)
screen.blit(water_test.draw(), (0,0))
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
if event.type == MOUSEBUTTONDOWN:
water_test.splash(10,0.1)
pygame.display.update()
clock.tick(60)
我尝试查找我们的教程实现的任何问题,但我找不到任何似乎不合适的地方。然后我尝试添加一个阻力函数,该函数将在每次更新时划分水速。然而,这并没有解决问题。
有谁知道做错了什么以及如何解决这个问题?
解决方案
许多与其他帖子相同的观察结果。我评论了一些事情,稍微改变了你的速度声明。在“传播”中,我添加了通行证。
稍微修改了数字,并得到了一些真正漂亮的飞溅。(比公认的解决方案更好!:( 哈哈。
如果您需要更多地解决这个问题,我建议您将扩展件注释掉(或将其赋值为零),您可以自行检查水的弹性。这使得 T/S 更容易。
import pygame, random
import math as m
from pygame import *
pygame.init()
WINDOW_SIZE = (854, 480)
screen = pygame.display.set_mode(WINDOW_SIZE,0,32) # initiate the window
clock = pygame.time.Clock()
font = pygame.font.SysFont("Arial", 18)
class surface_water_particle():
k = 0.04 # spring constant
d = 0.08 # damping constant
def __init__(self, x,y):
self.x_pos = x
self.y_pos = y
self.target_y = y
self.velocity = 0
def update(self):
x = self.y_pos - self.target_y # displacement of "spring"
a = -self.k * x - self.d * self.velocity # unit of acceleration
self.y_pos += self.velocity
self.velocity += a
class water():
def __init__(self, x_start, x_end, y_start, y_end, segment_length):
self.springs = []
self.x_start = x_start
self.y_start = y_start
self.x_end = x_end
self.y_end = y_end - 10
for i in range(abs(x_end - x_start) // segment_length):
self.springs.append(surface_water_particle(i * segment_length + x_start, y_end))
def update(self, spread):
passes = 4 # more passes = more splash spreading
for i in range(len(self.springs)):
self.springs[i].update()
leftDeltas = [0] * len(self.springs)
rightDeltas = [0] * len(self.springs)
for p in range(passes):
for i in range(0, len(self.springs) -1 ):
if i > 0:
leftDeltas[i] = spread * (self.springs[i].y_pos - self.springs[i - 1].y_pos)
self.springs[i - 1].velocity += leftDeltas[i]
if i < len(self.springs) - 1:
rightDeltas[i] = spread * (self.springs[i].y_pos - self.springs[i + 1].y_pos)
self.springs[i + 1].velocity += rightDeltas[i]
for i in range(0, len(self.springs) -1):
if i > 0:
self.springs[i - 1].y_pos += leftDeltas[i] # you were updating velocity here!
if i < len(self.springs) - 1:
self.springs[i + 1].y_pos += rightDeltas[i]
def splash(self, index, speed):
if index > 0 and index < len(self.springs) :
self.springs[index].velocity = speed
def draw(self):
water_surface = pygame.Surface((abs(self.x_start - self.x_end), abs(self.y_start - self.y_end))).convert_alpha()
water_surface.fill((0,0,0,0))
water_surface.set_colorkey((0,0,0,0))
polygon_points = []
polygon_points.append((self.x_start, self.y_start))
for spring in range(len(self.springs)):
polygon_points.append((water_test.springs[spring].x_pos, water_test.springs[spring].y_pos))
polygon_points.append((water_test.springs[len(self.springs) - 1].x_pos, self.y_start))
#pygame.draw.polygon(water_surface, (0,0,255), polygon_points)
for spring in range(0,len(self.springs) - 1):
pygame.draw.line(screen, (0,0,255), (water_test.springs[spring].x_pos, water_test.springs[spring].y_pos), (water_test.springs[spring + 1].x_pos, water_test.springs[spring + 1].y_pos), 2)
#water_surface.set_alpha(100)
return water_surface
def update_fps():
fps_text = font.render(str(int(clock.get_fps())), 1, pygame.Color("coral"))
screen.blit(fps_text, (0,0))
water_test = water(0,800,200,200, 3)
while True:
screen.fill((255,255,255))
water_test.update(0.025)
screen.blit(water_test.draw(), (0,0))
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
if event.type == MOUSEBUTTONDOWN:
water_test.splash(50,100)
pygame.display.update()
clock.tick(60)
推荐阅读
- java - 从 Firebase 身份验证中获得更多时间短信验证
- r - calculate_centralities(net, include = "Information Centrality") 中的错误:输入不是 igraph 对象或可能未连接
- javascript - 我尝试使用 fisher-yates shuffle 字符串,但没有奏效
- python - 用户提供的 MSSQL 数据库的 Pivotal/Django 设置
- ios - UICollection 视图的无限滚动
- c# - 单击该项目中的按钮时,如何访问 ListviewItem 的数据?
- ionic-framework - Ionic 4 组件未在导航上呈现
- jquery - 将具有相同类名的 div 附加到具有相同 id 名称的 div 中
- nix - Nix派生捆绑多个程序
- sql-server - 使用递增值更新组