我通过参考KDAB 的文章 part one来学习 OpenGL 。这是相当新的和有帮助的。但是,我在页面上尝试他的代码时遇到编译错误。
我的 Qt 项目中有三个文件:main.cpp、window.cpp 和 window.h。
窗口.h:
#ifndef WINDOW_H
#define WINDOW_H
#include <QWindow>
#include <QSurfaceFormat>
#include <QOpenGLContext>
#include <QOpenGLFunctions_4_3_Core>
class Window : public QWindow
{
Q_OBJECT
public:
Window(QScreen* screen);
signals:
private:
QOpenGLContext *m_context;
QOpenGLFunctions_4_3_Core* m_funcs;
};
#endif // WINDOW_H
窗口.cpp:
#include "window.h"
Window::Window(QScreen* screen) :
QWindow(screen)
{
setSurfaceType(OpenGLSurface);
QSurfaceFormat format;
format.setDepthBufferSize(24);
format.setMajorVersion(4);
format.setMinorVersion(3);
format.setSamples(4);
format.setProfile(QSurfaceFormat::CoreProfile);
setFormat(format);
create();
m_context = new QOpenGLContext;
m_context->setFormat(format);
m_context->create();
// Make the context current on this window
m_context->makeCurrent( this );
// Obtain a functions object and resolve all entry points
// m_funcs is declared as: QOpenGLFunctions_4_3_Core* m_funcs
m_funcs = m_context->versionFunctions();
if ( !m_funcs ) {
qWarning( "Could not obtain OpenGL versions object" );
exit( 1 );
}
m_funcs->initializeOpenGLFunctions();
// m_funcs->glVertexAttribDivisor();
}
主.cpp:
#include <QCoreApplication>
#include <QGLWidget>
int main(int argc, char *argv[]) {
QCoreApplication app(argc, argv);
return app.exec();
}
错误:从 'QAbstractOpenGLFunctions*' 到 'QOpenGLFunctions_4_3_Core*' 的无效转换 [-fpermissive]