Question

我正在尝试基于以下示例创建Python OpenGL代码： https://www.opengl.org/wiki/Tutorial2:_VAOs,_VBOs,_Vertex_and_Fragment_Shaders_(C_/_SDL)

我在调用glBufferData时遇到应用程序崩溃。

我面临的问题与此处提到的问题相同： Crash on glBufferData和http://www.cplusplus.com/forum/beginner/47978/

但是，这些页面中提到的解决方案还没有仍然有效。我使用PyQt5.5，Python 3.4.0与PyOpenGL 3.1。此外，GPU Caps Viewer报告我的计算机上可以使用Open GL 4.5。

非常感谢任何帮助或指示。

注意：在崩溃时启动PyDev调试器时，检查

self.context().isValid()

返回True

初始化代码如下：

from PyQt5 import QtGui, QtCore
import sys, array
from OpenGL import GL

class PulleysWithWeights3D( QtGui.QOpenGLWindow ):

    def __init__(self):
        super().__init__()

        # These are the 4D coordinates of a triangle that needs to be drawn.
        _vertexPos = [ 0.075, 0.075, 0.075, 0.075, \
                      0.275, 0.275, 0.275, 0.075, \
                      0.550, 0.550, 0.550, 0.075 ]

        # These are the RGBA colours for each vertex.
        _vertexCols = [ 0.875, 0.525, 0.075, 0.500, \
                       0.875, 0.525, 0.075, 0.500, \
                       0.875, 0.525, 0.075, 0.500 ]

        self._deltaPositions = array.array( 'f', _vertexPos )
        self._deltaColours = array.array( 'f', _vertexCols )

        self._appSurfaceFormat = QtGui.QSurfaceFormat()

        self._appSurfaceFormat.setProfile( QtGui.QSurfaceFormat.CoreProfile )
        self._appSurfaceFormat.setMajorVersion( 4 )
        self._appSurfaceFormat.setMinorVersion( 2 )
        self._appSurfaceFormat.setRenderableType( QtGui.QSurfaceFormat.OpenGL )
        self._appSurfaceFormat.setSamples( 16 )          
        self._appSurfaceFormat.setSwapBehavior( QtGui.QSurfaceFormat.DoubleBuffer )
        self.setSurfaceType( QtGui.QSurface.OpenGLSurface )

        self.setFormat( self._appSurfaceFormat )

        self.setIcon( QtGui.QIcon('OpenGL.png') )
        self.setTitle( 'Pulleys3D' )
        self.setMinimumSize( QtCore.QSize( 1280, 640 ) )
        self.show()


    def initializeGL(self):

        GL.glClearColor( 0.0, 0.0, 0.0, 0.500 ) # RGBA
        GL.glClearDepthf(1.0)
        GL.glClearStencil(0)
        GL.glClear( GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT | GL.GL_STENCIL_BUFFER_BIT )

        self._vaoColouredDelta = GL.glGenVertexArrays(1) 
        GL.glBindVertexArray( self._vaoColouredDelta )

        self._vboPositions = GL.glGenBuffers(1)
        GL.glBindBuffer( GL.GL_ARRAY_BUFFER, self._vboPositions )

        GL.glBufferData( GL.GL_ARRAY_BUFFER, \
                         self._deltaPositions.buffer_info()[1] * self._deltaPositions.itemsize, \
                         self._deltaPositions.tolist(), GL.GL_STATIC_DRAW )

        # PS: Code has been stopped here.

    def resizeGL(self, wd, ht ):
        GL.glViewport( 0, 0, wd, ht )


    def paintGL(self):
        pass


if __name__ == '__main__':
    _pww3dApp = QtGui.QGuiApplication( sys.argv )
    _pww3d = PulleysWithWeights3D()
    sys.exit( _pww3dApp.exec_() )

Answer 1

问题已经解决。致电

self._deltaPositions.tolist()

造成了这个问题。我用

替换了它

self._deltaPositions.tostring()

然后崩溃就消失了。

glBufferData仍然崩溃

1 个答案: