如何加速使用Python、Pyglet和顶点缓冲区编写的OpenGL代码? 我希望从使用基于SDL 1 C++库的Python库“pyGAME”升级到使用更现代的OpenGL代码。我有一个简单的Pygame程序,可以绘制2000个矩形: import pygame import random import time # Define some colors BLACK = (0, 0, 0) WHITE = (255, 255, 255) GREEN = (0, 255, 0) RED = (255, 0, 0) class Rectangle(): '''Draw a rectangle''' def __init__(self): '''These are the rectangle's attributes.''' self.x = 0 self.y = 0 self.width = 0 self.height = 0 self.change_x = 0 self.change_y = 0 self.color = [0, 0, 0] def draw(self, screen): '''Drawing the rectangle.''' pygame.draw.rect(screen, self.color, [self.x, self.y, self.width, self.height]) def move(self): '''Moving the rectangle around the screen.''' self.x += self.change_x self.y += self.change_y def main(): pygame.init() # Set the width and height of the screen [width, height] size = (700, 500) screen = pygame.display.set_mode(size) pygame.display.set_caption("My Game") # Loop until the user clicks the close button. done = False # Used to manage how fast the screen updates clock = pygame.time.Clock() my_list = [] color_list = [] '''Creates 1000 rectangles.''' for i in range(2000): my_object = Rectangle() r = random.randrange(256) g = random.randrange(256) b = random.randrange(256) my_object.color = [r, g, b] color_list.append(my_object) my_object.x = random.randrange(701) my_object.y = random.randrange(501) my_object.change_x = random.randrange(-3, 4) my_object.change_y = random.randrange(-3, 4) my_object.width = random.randrange(20, 71) my_object.height = random.randrange(20, 71) my_list.append(my_object) # -------- Main Program Loop ----------- while not done: # --- Main event loop for event in pygame.event.get(): if event.type == pygame.QUIT: done = True screen.fill(WHITE) # Start the clock start = time.time() for item in my_list: item.draw(screen) item.move() # --- Go ahead and update the screen with what we've drawn. pygame.display.flip() # End the clock elapsed = time.time() - start print(elapsed) # --- Limit to 60 frames per second clock.tick(60) # Close the window and quit. pygame.quit() main()
在我的电脑上,每画一帧大约需要0.012秒 我还有一个使用Python Pyglet库访问OpenGL的程序。我正在使用顶点缓冲区来加快速度。这是代码:如何加速使用Python、Pyglet和顶点缓冲区编写的OpenGL代码? 我希望从使用基于SDL 1 C++库的Python库“pyGAME”升级到使用更现代的OpenGL代码。我有一个简单的Pygame程序,可以绘制2000个矩形: import pygame import random import time # Define some colors BLACK = (0, 0, 0) WHITE = (255, 255, 255) GREEN = (0, 255, 0) RED = (255, 0, 0) class Rectangle(): '''Draw a rectangle''' def __init__(self): '''These are the rectangle's attributes.''' self.x = 0 self.y = 0 self.width = 0 self.height = 0 self.change_x = 0 self.change_y = 0 self.color = [0, 0, 0] def draw(self, screen): '''Drawing the rectangle.''' pygame.draw.rect(screen, self.color, [self.x, self.y, self.width, self.height]) def move(self): '''Moving the rectangle around the screen.''' self.x += self.change_x self.y += self.change_y def main(): pygame.init() # Set the width and height of the screen [width, height] size = (700, 500) screen = pygame.display.set_mode(size) pygame.display.set_caption("My Game") # Loop until the user clicks the close button. done = False # Used to manage how fast the screen updates clock = pygame.time.Clock() my_list = [] color_list = [] '''Creates 1000 rectangles.''' for i in range(2000): my_object = Rectangle() r = random.randrange(256) g = random.randrange(256) b = random.randrange(256) my_object.color = [r, g, b] color_list.append(my_object) my_object.x = random.randrange(701) my_object.y = random.randrange(501) my_object.change_x = random.randrange(-3, 4) my_object.change_y = random.randrange(-3, 4) my_object.width = random.randrange(20, 71) my_object.height = random.randrange(20, 71) my_list.append(my_object) # -------- Main Program Loop ----------- while not done: # --- Main event loop for event in pygame.event.get(): if event.type == pygame.QUIT: done = True screen.fill(WHITE) # Start the clock start = time.time() for item in my_list: item.draw(screen) item.move() # --- Go ahead and update the screen with what we've drawn. pygame.display.flip() # End the clock elapsed = time.time() - start print(elapsed) # --- Limit to 60 frames per second clock.tick(60) # Close the window and quit. pygame.quit() main(),python,opengl,pyglet,Python,Opengl,Pyglet,在我的电脑上,每画一帧大约需要0.012秒 我还有一个使用Python Pyglet库访问OpenGL的程序。我正在使用顶点缓冲区来加快速度。这是代码: """ This example uses OpenGL via Pyglet and draws a bunch of rectangles on the screen. """ import random import time import pyglet.gl as GL import pyglet import ctypes # S
"""
This example uses OpenGL via Pyglet and draws
a bunch of rectangles on the screen.
"""
import random
import time
import pyglet.gl as GL
import pyglet
import ctypes
# Set up the constants
SCREEN_WIDTH = 700
SCREEN_HEIGHT = 500
RECT_WIDTH = 50
RECT_HEIGHT = 50
class VertexBuffer():
""" Class to hold vertex buffer info. """
def __init__(self, vbo_id, size, width, height, color):
self.vbo_id = vbo_id
self.size = size
self.width = width
self.height = height
self.color = color
def create_rect(width, height, color):
""" Create a vertex buffer for a rectangle. """
v2f = [-width / 2, -height / 2,
width / 2, -height / 2,
width / 2, height / 2,
-width / 2, height / 2]
vbo_id = GL.GLuint()
GL.glGenBuffers(1, ctypes.pointer(vbo_id))
data2 = (GL.GLfloat*len(v2f))(*v2f)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vbo_id)
GL.glBufferData(GL.GL_ARRAY_BUFFER, ctypes.sizeof(data2), data2, GL.GL_STATIC_DRAW)
shape = VertexBuffer(vbo_id, len(v2f)//2, width, height, color)
return shape
def render_rect_filled(shape, x, y):
""" Render the shape at the right spot. """
# Set color
GL.glDisable(GL.GL_BLEND)
GL.glColor4ub(shape.color[0], shape.color[1], shape.color[2], 255)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, shape.vbo_id)
GL.glVertexPointer(2, GL.GL_FLOAT, 0, 0)
GL.glLoadIdentity()
GL.glTranslatef(x + shape.width / 2, y + shape.height / 2, 0)
GL.glDrawArrays(GL.GL_QUADS, 0, shape.size)
class Rectangle():
def __init__(self, x, y, width, height, delta_x, delta_y, color):
self.x = x
self.y = y
self.width = width
self.height = height
self.delta_x = delta_x
self.delta_y = delta_y
self.color = color
self.vbo = create_rect(self.width, self.height, self.color)
def move(self):
self.x += self.delta_x
self.y += self.delta_y
def draw(self):
render_rect_filled(self.vbo, self.x, self.y)
class MyApplication():
""" Main application class. """
def setup(self):
""" Set up the game and initialize the variables. """
# Set background to white
GL.glClearColor(1, 1, 1, 1)
self.shape_list = []
for i in range(2000):
x = random.randrange(0, SCREEN_WIDTH)
y = random.randrange(0, SCREEN_HEIGHT)
width = random.randrange(20, 71)
height = random.randrange(20, 71)
d_x = random.randrange(-3, 4)
d_y = random.randrange(-3, 4)
red = random.randrange(256)
green = random.randrange(256)
blue = random.randrange(256)
alpha = random.randrange(256)
shape_type = random.randrange(2)
shape = Rectangle(x, y, width, height, d_x, d_y, (red, green, blue))
self.shape_list.append(shape)
def animate(self, dt):
""" Move everything """
for shape in self.shape_list:
shape.move()
def on_draw(self):
"""
Render the screen.
"""
start = time.time()
GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
GL.glMatrixMode(GL.GL_MODELVIEW)
GL.glEnableClientState(GL.GL_VERTEX_ARRAY)
for shape in self.shape_list:
shape.draw()
elapsed = time.time() - start
print(elapsed)
def main():
window = pyglet.window.Window(SCREEN_WIDTH, SCREEN_HEIGHT)
app = MyApplication()
app.setup()
pyglet.clock.schedule_interval(app.animate, 1/60)
@window.event
def on_draw():
window.clear()
app.on_draw()
pyglet.app.run()
main()
OpenGL代码绘制每个帧需要0.056秒。我希望我能更接近Pygame的表现。甚至更好。我可以用什么OpenGL技巧来加快速度?好的,根据我从Reddit学到的,我可以做两件事来加快速度 与其使用2000个VBO,不如使用一个。下面是一个更快的示例:
"""
This example uses OpenGL via Pyglet and draws
a bunch of rectangles on the screen.
"""
import random
import time
import pyglet.gl as GL
import pyglet
import ctypes
# Set up the constants
SCREEN_WIDTH = 700
SCREEN_HEIGHT = 500
RECT_WIDTH = 50
RECT_HEIGHT = 50
def render_rect_filled(shape, offset):
""" Render the shape at the right spot. """
# Set color
GL.glLoadIdentity()
GL.glColor3ub(shape.color[0], shape.color[1], shape.color[2])
GL.glTranslatef(shape.x + shape.width / 2, shape.y + shape.height / 2, 0)
GL.glDrawArrays(GL.GL_QUADS, offset, 4)
class Rectangle():
def __init__(self, x, y, width, height, delta_x, delta_y, color):
self.x = x
self.y = y
self.width = width
self.height = height
self.delta_x = delta_x
self.delta_y = delta_y
self.color = color
def move(self):
self.x += self.delta_x
self.y += self.delta_y
def create_rects(rect_list):
""" Create a vertex buffer for a set of rectangles. """
v2f = []
for shape in rect_list:
v2f.extend ([-shape.width / 2, -shape.height / 2,
shape.width / 2, -shape.height / 2,
shape.width / 2, shape.height / 2,
-shape.width / 2, shape.height / 2])
vbo_id = GL.GLuint()
GL.glGenBuffers(1, ctypes.pointer(vbo_id))
data2 = (GL.GLfloat*len(v2f))(*v2f)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vbo_id)
GL.glBufferData(GL.GL_ARRAY_BUFFER, ctypes.sizeof(data2), data2, GL.GL_STATIC_DRAW)
return vbo_id
class MyApplication():
""" Main application class. """
def setup(self):
""" Set up the game and initialize the variables. """
# Set background to white
GL.glClearColor(1, 1, 1, 1)
self.shape_list = []
for i in range(2000):
x = random.randrange(0, SCREEN_WIDTH)
y = random.randrange(0, SCREEN_HEIGHT)
width = random.randrange(20, 71)
height = random.randrange(20, 71)
d_x = random.randrange(-3, 4)
d_y = random.randrange(-3, 4)
red = random.randrange(256)
green = random.randrange(256)
blue = random.randrange(256)
alpha = random.randrange(256)
shape_type = random.randrange(2)
shape = Rectangle(x, y, width, height, d_x, d_y, (red, green, blue))
self.shape_list.append(shape)
self.vertex_vbo_id = create_rects(self.shape_list)
def animate(self, dt):
""" Move everything """
for shape in self.shape_list:
shape.move()
def on_draw(self):
"""
Render the screen.
"""
start = time.time()
GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
GL.glMatrixMode(GL.GL_MODELVIEW)
GL.glEnableClientState(GL.GL_VERTEX_ARRAY)
GL.glDisable(GL.GL_BLEND)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.vertex_vbo_id)
GL.glVertexPointer(2, GL.GL_FLOAT, 0, 0)
offset = 0
for shape in self.shape_list:
render_rect_filled(shape, offset)
offset += 4
elapsed = time.time() - start
print(elapsed)
def main():
window = pyglet.window.Window(SCREEN_WIDTH, SCREEN_HEIGHT)
app = MyApplication()
app.setup()
pyglet.clock.schedule_interval(app.animate, 1/60)
@window.event
def on_draw():
window.clear()
app.on_draw()
pyglet.app.run()
main()
此外,还可以使用VBOs进行颜色设置。这使用了VBO,速度更快:
"""
This example uses OpenGL via Pyglet and draws
a bunch of rectangles on the screen.
"""
import random
import time
import pyglet.gl as GL
import pyglet
import ctypes
# Set up the constants
SCREEN_WIDTH = 700
SCREEN_HEIGHT = 500
RECT_WIDTH = 50
RECT_HEIGHT = 50
def create_rect(width, height, color):
""" Create a vertex buffer for a rectangle. """
v2f = [-width / 2, -height / 2,
width / 2, -height / 2,
width / 2, height / 2,
-width / 2, height / 2]
vbo_id = GL.GLuint()
GL.glGenBuffers(1, ctypes.pointer(vbo_id))
data2 = (GL.GLfloat*len(v2f))(*v2f)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vbo_id)
GL.glBufferData(GL.GL_ARRAY_BUFFER, ctypes.sizeof(data2), data2, GL.GL_STATIC_DRAW)
shape = VertexBuffer(vbo_id, len(v2f)//2, width, height, color)
return shape
def render_rect_filled(shape, offset):
""" Render the shape at the right spot. """
# Set color
GL.glLoadIdentity()
#GL.glColor4ub(shape.color[0], shape.color[1], shape.color[2], 255)
GL.glTranslatef(shape.x + shape.width / 2, shape.y + shape.height / 2, 0)
GL.glDrawArrays(GL.GL_QUADS, offset, 4)
class Rectangle():
def __init__(self, x, y, width, height, delta_x, delta_y, color):
self.x = x
self.y = y
self.width = width
self.height = height
self.delta_x = delta_x
self.delta_y = delta_y
self.color = color
def move(self):
self.x += self.delta_x
self.y += self.delta_y
def create_rects(rect_list):
""" Create a vertex buffer for a set of rectangles. """
v2f = []
for shape in rect_list:
v2f.extend ([-shape.width / 2, -shape.height / 2,
shape.width / 2, -shape.height / 2,
shape.width / 2, shape.height / 2,
-shape.width / 2, shape.height / 2])
vbo_id = GL.GLuint()
GL.glGenBuffers(1, ctypes.pointer(vbo_id))
data2 = (GL.GLfloat*len(v2f))(*v2f)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vbo_id)
GL.glBufferData(GL.GL_ARRAY_BUFFER, ctypes.sizeof(data2), data2, GL.GL_STATIC_DRAW)
return vbo_id
def create_colors(rect_list):
""" Create a vertex buffer for a set of rectangles. """
v2f = []
for shape in rect_list:
for i in range(4):
v2f.extend(shape.color)
vbo_id = GL.GLuint()
GL.glGenBuffers(1, ctypes.pointer(vbo_id))
data2 = (GL.GLfloat*len(v2f))(*v2f)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, vbo_id)
GL.glBufferData(GL.GL_ARRAY_BUFFER, ctypes.sizeof(data2), data2, GL.GL_STATIC_DRAW)
return vbo_id
class MyApplication():
""" Main application class. """
def setup(self):
""" Set up the game and initialize the variables. """
# Set background to white
GL.glClearColor(1, 1, 1, 1)
self.shape_list = []
for i in range(2000):
x = random.randrange(0, SCREEN_WIDTH)
y = random.randrange(0, SCREEN_HEIGHT)
width = random.randrange(20, 71)
height = random.randrange(20, 71)
d_x = random.randrange(-3, 4)
d_y = random.randrange(-3, 4)
red = random.random()
green = random.random()
blue = random.random()
shape = Rectangle(x, y, width, height, d_x, d_y, (red, green, blue))
self.shape_list.append(shape)
self.vertex_vbo_id = create_rects(self.shape_list)
self.color_vbo_id = create_colors(self.shape_list)
def animate(self, dt):
""" Move everything """
for shape in self.shape_list:
shape.move()
def on_draw(self):
"""
Render the screen.
"""
start = time.time()
GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT)
GL.glMatrixMode(GL.GL_MODELVIEW)
GL.glDisable(GL.GL_BLEND)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.vertex_vbo_id)
GL.glEnableClientState(GL.GL_VERTEX_ARRAY)
GL.glVertexPointer(2, GL.GL_FLOAT, 0, 0)
GL.glBindBuffer(GL.GL_ARRAY_BUFFER, self.color_vbo_id)
GL.glEnableClientState(GL.GL_COLOR_ARRAY)
GL.glColorPointer(3, GL.GL_FLOAT, 0, 0)
offset = 0
for shape in self.shape_list:
render_rect_filled(shape, offset)
offset += 4
elapsed = time.time() - start
print(elapsed)
def main():
window = pyglet.window.Window(SCREEN_WIDTH, SCREEN_HEIGHT)
app = MyApplication()
app.setup()
pyglet.clock.schedule_interval(app.animate, 1/60)
@window.event
def on_draw():
window.clear()
app.on_draw()
pyglet.app.run()
main()