为什么我的程序在渲染128个粒子时会变慢？我认为这还不足以达不到30 fps。
我所做的只是渲染128个粒子并给它们一些基本的引力
on_draw函数
def on_draw(self, time=None):
glClearColor(0.0, 0.0, 0.0, 1.0)
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glLoadIdentity()
self.particles.append(Particle())
for particle in self.particles:
particle.draw()
if particle.is_dead:
self.particles.remove(particle)
粒子类
class Particle:
def __init__(self, **kwargs):
self.acceleration = Vector2(0, 0.05)
self.velocity = Vector2(random.uniform(-1, 1), random.uniform(-1, 0))
self.position = Vector2()
self.time_to_live = 255
self.numpoints = 50
self._vertices = []
for i in range(self.numpoints):
angle = math.radians(float(i) / self.numpoints * 360.0)
x = 10 * math.cos(angle) + self.velocity[0] + 300
y = 10 * math.sin(angle) + self.velocity[1] + 400
self._vertices += [x, y]
def update(self, time=None):
self.velocity += self.acceleration
self.position -= self.velocity
self.time_to_live -= 2
def draw(self):
glEnable(GL_BLEND)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
glPushMatrix()
glTranslatef(self.position[0], self.position[1], 0)
pyglet.graphics.draw(self.numpoints, GL_TRIANGLE_FAN, ('v2f', self._vertices), ('c4B', self.color))
glPopMatrix()
self.update()
@property
def is_dead(self):
if self.time_to_live <= 0:
return True
return False
@property
def color(self):
return tuple(color for i in range(self.numpoints) for color in (255, 255, 255, self.time_to_live))
答案 0 :(得分：3)
我对使用GL_TRIANGLE_FAN并不是很满意，因为它在使用批量渲染时会导致很多奇怪的形状。因此，请考虑转移到GL_TRIANGLES并简单地将所有点添加到对象，而不是依靠GL来为您关闭形状。
这样，您可以轻松转移到批量渲染：
import pyglet
from pyglet.gl import *
from collections import OrderedDict
from time import time, sleep
from math import *
from random import randint
key = pyglet.window.key
class CustomGroup(pyglet.graphics.Group):
def set_state(self):
#pyglet.gl.glLineWidth(5)
#glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
#glColor4f(1, 0, 0, 1) #FFFFFF
#glLineWidth(1)
#glEnable(texture.target)
#glBindTexture(texture.target, texture.id)
pass
def unset_state(self):
glLineWidth(1)
#glDisable(texture.target)
class Particle():
def __init__(self, x, y, batch, particles):
self.batch = batch
self.particles = particles
self.group = CustomGroup()
self.add_point(x, y)
def add_point(self, x, y):
colors = ()#255,0,0
sides = 50
radius = 25
deg = 360/sides
points = ()#x, y # Starting point is x, y?
prev = None
for i in range(sides):
n = ((deg*i)/180)*pi # Convert degrees to radians
point = int(radius * cos(n)) + x, int(radius * sin(n)) + y
if prev:
points += x, y
points += prev
points += point
colors += (255, i*int(255/sides), 0)*3 # Add a color pair for each point (r,g,b) * points[3 points added]
prev = point
points += x, y
points += prev
points += points[2:4]
colors += (255, 0, 255)*3
self.particles[len(self.particles)] = self.batch.add(int(len(points)/2), pyglet.gl.GL_TRIANGLES, self.group, ('v2i/stream', points), ('c3B', colors))
class main(pyglet.window.Window):
def __init__ (self, demo=False):
super(main, self).__init__(800, 600, fullscreen = False, vsync = True)
#print(self.context.config.sample_buffers)
self.x, self.y = 0, 0
self.sprites = OrderedDict()
self.batches = OrderedDict()
self.batches['default'] = pyglet.graphics.Batch()
self.active_batch = 'default'
for i in range(1000):
self.sprites[len(self.sprites)] = Particle(randint(0, 800), randint(0, 600), self.batches[self.active_batch], self.sprites)
self.alive = True
self.fps = 0
self.last_fps = time()
self.fps_label = pyglet.text.Label(str(self.fps) + ' fps', font_size=12, x=3, y=self.height-15)
def on_draw(self):
self.render()
def on_close(self):
self.alive = 0
def on_key_press(self, symbol, modifiers):
if symbol == key.ESCAPE: # [ESC]
self.alive = 0
def render(self):
self.clear()
#self.bg.draw()
self.batches[self.active_batch].draw()
self.fps += 1
if time()-self.last_fps > 1:
self.fps_label.text = str(self.fps) + ' fps'
self.fps = 0
self.last_fps = time()
self.fps_label.draw()
self.flip()
def run(self):
while self.alive == 1:
self.render()
# -----------> This is key <----------
# This is what replaces pyglet.app.run()
# but is required for the GUI to not freeze
#
event = self.dispatch_events()
if __name__ == '__main__':
x = main(demo=True)
x.run()
请记住，在我的nVidia 1070上，我设法从这段代码中获得了大约35fps，这并不令人头疼。但它是 1000个对象 *边，给予或接受。
我改变的主要是：
self.batch.add(int(len(points)/2), pyglet.gl.GL_TRIANGLES, self.group, ('v2i/stream', points), ('c3B', colors))
在你的绘制循环中，你会做：
self.batch.draw()
而不是为每个粒子对象调用Particle.draw()
它的作用是它将所有对象以一个巨大的批量发送到图形卡，而不是告诉图形卡逐个呈现对象。
正如@thokra指出的那样，你的代码比GPU密集型更加占用CPU 希望这可以解决它或给你一些指示。
这段代码的大部分内容来自我与我的好朋友一起做过的局域网项目：
因为我没有你所有的代码，主要是主循环。我将你的问题应用到我自己的代码中并通过调整它来“解决”它。再次，如果您需要，希望它能帮助并从该github项目中窃取想法。新年快乐！