嗨，我在运行这段代码时遇到了一个非常奇怪的问题。我也不明白它与 OpenGL Api 有何冲突。代码如下：
import sys
sys.path.append("..\Blocks")
print sys.path
import pygame
from pygame.locals import *
from OpenGL.GL import *
from OpenGL.GLU import *
import random
try:
import BlockModel
except:
print "Cant Find Block Model"
def createBlock():
block = BlockModel.Block()
blockVertices = block.returnVertices()
blockEdges = block.returnEdges()
blockSurface = block.returnSurface()
glBegin(GL_QUADS)
for surface in blockSurface:
for faceVertex in surface:
glVertex3fv(blockVertices[faceVertex])
glEnd
glBegin(GL_LINES)
for edge in blockEdges:
for vertex in edge:
glVertex3fv(blockVertices[vertex])
glEnd()
def main():
pygame.init()
display = (800, 600)
pygame.display.set_mode(display, DOUBLEBUF|OPENGL)
gluPerspective(15, (display[0]/display[1]), 0.1, 50.0)
glTranslatef(random.randrange(-5,5),random.randrange(-5,5), -40)
exit = False
while not exit:
pygame.time.wait(10)
glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT)
createBlock()
pygame.display.flip()
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
main()
尝试运行程序时出现此错误：
C:\Users\Haavard\Desktop\MinecraftPythonProject\framework>python main.py
['C:\\Users\\Haavard\\Desktop\\MinecraftPythonProject\\framework', 'C:\\Windows\
\system32\\python27.zip', 'C:\\Python27\\DLLs', 'C:\\Python27\\lib', 'C:\\Python
27\\lib\\plat-win', 'C:\\Python27\\lib\\lib-tk', 'C:\\Python27', 'C:\\Python27\\
lib\\site-packages', 'C:\\Python27\\lib\\site-packages\\PIL', '..\\Blocks']
Traceback (most recent call last):
File "main.py", line 60, in <module>
main()
File "main.py", line 52, in main
createBlock()
File "main.py", line 37, in createBlock
glEnd()
File "latebind.pyx", line 44, in OpenGL_accelerate.latebind.Curry.__call__ (c:
\Users\mcfletch\OpenGL-dev\OpenGL-ctypes\OpenGL_accelerate\src\latebind.c:1201)
File "C:\Python27\lib\site-packages\OpenGL\GL\exceptional.py", line 46, in glE
nd
return baseFunction( )
File "C:\Python27\lib\site-packages\OpenGL\platform\baseplatform.py", line 402
, in __call__
return self( *args, **named )
File "errorchecker.pyx", line 53, in OpenGL_accelerate.errorchecker._ErrorChec
ker.glCheckError (c:\Users\mcfletch\OpenGL-dev\OpenGL-ctypes\OpenGL_accelerate\s
rc\errorchecker.c:1218)
OpenGL.error.GLError: GLError(
err = 1282,
description = 'invalid operation',
baseOperation = glEnd,
cArguments = ()
)
我在 HP 机器上运行 Windows 7。
块模型模块如下所示：
class Block:
# initializing the basic functions of a block
def __init__(self, blockID = "0", blockType = "stone", verticesCords = ((1,-1,-1),(1,1,-1),(-1,1,-1),(-1,-1,-1),(1,-1,1),(1,1,1),(-1,-1,1),(-1,1,1)), edges = ((0,1),(0,3),(0,4),(2,1),(2,3),(2,7),(6,3),(6,4),(6,7),(5,1),(5,4),(5,7)), surfaces = (((0,1,2,3),(3,2,7,6),(6,7,5,4),(4,5,1,0),(1,5,7,2),(4,0,3,6)))):
# Block Placement
self.PLACEMENT = verticesCords
# Block identity in the world
self.EDGES = edges
self.SURFACE = surfaces
self.BLOCKID = blockID
# The block type
self.BLOCKTYPE = blockType
# A function letting the framework know its placement.
def returnVertices(self):
return self.PLACEMENT
def returnEdges(self):
return self.EDGES
def returnSurface(self):
return self.SURFACE
# A function to make the block fetch its own texture.
def defineTexture():
pass
感谢您的任何回答！ :)
您可能已经解决了这个问题，但我的猜测是您的边中可能有奇数个顶点。 glEnd() 上的 1282 错误仅意味着整个操作有问题。 GL_LINES 期望给出偶数个顶点，因为 GL_LINES 以成对的点来定义每个线段，而不是通过连续的点串来形成大折线。 仔细检查每条边都有两个点。
您应该从
()glEnd()问题是这个
glEnd
应该是对此函数的调用：
glEnd()
请注意，实际错误是在
glEnd()createBlockglBegin(GL_QUADS)glEnd()glBegin(GL_LINES)如果在
GL_INVALID_OPERATION和相应的glBegin执行之间执行glBegin，则会生成。glEnd
让我们看看其他答案，首先是用户 1961169（2015 年 7 月 21 日）的答案，他指出错误来自于尝试使用奇数个顶点绘制线条。这是不正确的，因为这应该“不会”产生错误。不完全指定的图元根本无法绘制。根据文档：
不完整指定的直线、三角形、四边形和多边形不会被绘制。当提供的顶点太少而无法指定单个图元时，或者指定了不正确的多个顶点时，就会导致不完整的指定。不完整的原语将被忽略；其余的都画好了。Shivam 的回答（2019 年 9 月 4 日）指出，括号应该从第 37 行的
glEnd()removed（就在函数结束之前）。这显然是不正确的，因为这样
glEndglEnd(GL_LINES)或
glEnd(GL_QUADS)glEnd( void )-> void。
希望这有帮助