使用Qt5加载OpenGL扩展

Question

I've followed this article on using OpenGL extensions in Qt5 ( reference ) and following the example code, I get the following error messages: undefined reference to

QOpenGLExtension_ARB_instanced_arrays::QOpenGLExtension_ARB_instanced_arrays()'
undefined reference to `QOpenGLExtension_ARB_instanced_arrays::initializeOpenGLFunctions()'

I've made sure that I have said extension through m_context->hasExtension(..)

Here's my code block (very similar to the article code):

assert(m_context->hasExtension(QByteArrayLiteral("GL_ARB_instanced_arrays")));
QOpenGLExtension_ARB_instanced_arrays* m_instanceFuncs = new QOpenGLExtension_ARB_instanced_arrays();
m_instanceFuncs->initializeOpenGLFunctions();
qDebug("extension loaded");

I'd assume the article would have mentioned other necessary steps.. I'm using Qt 5.3 on Windows 7 with a 4.3 Core context.

Answer 1

QOpenGLExtensions驻留在opengl之外的另一个子模块中，因此我必须在pro文件中启用它，如下所示：

QT += openglextensions