[英]pyglet when using draw() instead of eventloop
我正在嘗試用pyglet畫一個圓。 但是當我使用app.run()循環的draw()函數instad時,它不可見。 有什么建議我可以做什么? 謝謝
from math import *
from pyglet.gl import *
window = pyglet.window.Window()
def makeCircle(x_pos, y_pos, radius, numPoints):
verts = []
glClear(pyglet.gl.GL_COLOR_BUFFER_BIT)
glColor3f(1,1,0)
for i in range(numPoints):
angle = radians(float(i)/numPoints * 360.0)
x = radius *cos(angle) + x_pos
y = radius *sin(angle) + y_pos
verts += [x,y]
circle = pyglet.graphics.vertex_list(numPoints, ('v2f', verts))
circle.draw(GL_LINE_LOOP)
input()
makeCircle(5,5, 100, 10)
您必須調用window.flip()
來更新窗口。
由於尚未設置投影矩陣,因此必須在歸一化的設備坐標中繪制幾何圖形,該坐標在所有3個分量(x,y,z)的[-1,1]范圍內。 注意,默認情況下,當pyglet.app.run()
啟動應用程序時,pyglet設置投影矩陣。
調用window.flip()
並更改幾何:
from math import *
from pyglet.gl import *
window = pyglet.window.Window()
def makeCircle(x_pos, y_pos, radius, numPoints):
verts = []
glClear(pyglet.gl.GL_COLOR_BUFFER_BIT)
glColor3f(1,1,0)
for i in range(numPoints):
angle = radians(float(i)/numPoints * 360.0)
x = radius *cos(angle) + x_pos
y = radius *sin(angle) + y_pos
verts += [x,y]
circle = pyglet.graphics.vertex_list(numPoints, ('v2f', verts))
circle.draw(GL_LINE_LOOP)
window.flip() # <--------
input()
makeCircle(0, 0, 0.5, 10) # <--------
另外,您可以通過glOrtho
自行設置正交投影。 例如:
from math import *
from pyglet.gl import *
window = pyglet.window.Window()
def makeCircle(x_pos, y_pos, radius, numPoints):
verts = []
glMatrixMode(GL_PROJECTION)
glOrtho(0, 640, 0, 480, -1, 1)
glMatrixMode(GL_MODELVIEW)
glClear(pyglet.gl.GL_COLOR_BUFFER_BIT)
glColor3f(1,1,0)
for i in range(numPoints):
angle = radians(float(i)/numPoints * 360.0)
x = radius *cos(angle) + x_pos
y = radius *sin(angle) + y_pos
verts += [x,y]
circle = pyglet.graphics.vertex_list(numPoints, ('v2f', verts))
circle.draw(GL_LINE_LOOP)
text = 'This is a test but it is not visible'
label = pyglet.text.Label(text, font_size=36,
x=10, y=10, anchor_x='left', anchor_y='bottom',
color=(255, 123, 255, 255))
label.draw()
window.flip()
input()
makeCircle(5,5, 100, 10)
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