PyOpenGL :: OpenGL.error.NullFunctionError: Attempt to call an undefined function glutInit, check for bool(glutInit) before calling

Question

为了迈出进入 PyOpenGL 的第一步，我非常 easy guide 正在关注这个。

我安装了pip install PyOpenGL PyOpenGL_accelerate，一切正常。
我通过测试代码测试安装：

进口OpenGL.GL 导入 OpenGL.GLUT 导入 OpenGL.GLU print("Imports successful!") # 如果你看到这个打印到控制台，那么安装成功

一切顺利

我现在运行这个脚本：

from OpenGL.GL import *
from OpenGL.GLUT import *
from OpenGL.GLU import *

w,h= 500,500
def square():
    glBegin(GL_QUADS)
    glVertex2f(100, 100)
    glVertex2f(200, 100)
    glVertex2f(200, 200)
    glVertex2f(100, 200)
    glEnd()

def iterate():
    glViewport(0, 0, 500, 500)
    glMatrixMode(GL_PROJECTION)
    glLoadIdentity()
    glOrtho(0.0, 500, 0.0, 500, 0.0, 1.0)
    glMatrixMode (GL_MODELVIEW)
    glLoadIdentity()

def showScreen():
    glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
    glLoadIdentity()
    iterate()
    glColor3f(1.0, 0.0, 3.0)
    square()
    glutSwapBuffers()

glutInit()
glutInitDisplayMode(GLUT_RGBA)
glutInitWindowSize(500, 500)
glutInitWindowPosition(0, 0)
wind = glutCreateWindow("OpenGL Coding Practice")
glutDisplayFunc(showScreen)
glutIdleFunc(showScreen)
glutMainLoop()

我收到的错误是 OpenGL.error.NullFunctionError: Attempt to call an undefined function glutInit, check for bool(glutInit) before calling

所以我在网上阅读了一些指南，他们指出从 here 下载轮子。所以我继续下载 PyOpenGL_accelerate‑3.1.5‑cp38‑cp38‑win_amd64.whl 和 PyOpenGL‑3.1.5‑cp38‑cp38‑win_amd64.whl 因为我运行ning Python 3.8

pip install .\PyOpenGL_accelerate-3.1.5-cp39-cp39-win_amd64.whl returns PyOpenGL-accelerate is already installed with the same version as the provided wheel. Use --force-reinstall to force an installation of the wheel.
pip install .\PyOpenGL_accelerate-3.1.5-cp38-cp38-win_amd64.whl returns PyOpenGL-accelerate is already installed with the same version as the provided wheel. Use --force-reinstall to force an installation of the wheel.

如此简单的指南怎么会导致我如此痛苦的结果？

如何检查是否安装了 Visual C++ 14.0 build tools。也许这是我唯一缺少的步骤？

Answer 1

包中缺少 freeglut DLL。

卸载“PyOpenGL”：

pip uninstall pyopengl

从 Unofficial Windows Binaries for Python Extension Packages 下载 wheel 包（例如：“PyOpenGL‑3.1.6‑cp311‑cp311‑win_amd64.whl”）并安装它：

pip install PyOpenGL‑3.1.6‑cp311‑cp311‑win_amd64.whl

PyOpenGL :: OpenGL.error.NullFunctionError: Attempt to call an undefined function glutInit, check for bool(glutInit) before calling

PyOpenGL :: OpenGL.error.NullFunctionError: Attempt to call an undefined function glutInit, check for bool(glutInit) before calling

python

opengl

pyopengl

visual-c++

visual-studio-2017-build-tools