question about QOpenGLWidget
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hello, I try to use Qopenglwidget and glew to draw a triangle, but nothing comes out, what's wrong with the code, what I need to change? Is it ok to use glew+QOpenGLWiget? If it's possible, what I need to do with the code? I wish to work with glew + qopenglwidget. I saw other people draw sth with glew+QGLWidget, but QGLWidget is belong to QT4.8, QT5.4 seems throw it away.
+++++++++++++++++++
MeGlWindow.h
#include <QOpenGLWidget>
class MeGlWindow : public QOpenGLWidget
{
protected:
void paintGL();
void initializeGL();
public:
};
++++++++++++++++++++++++++++++++
MeGlWindow.cpp
#include <gl/glew.h>
#include "MeGlWindow.h"
void MeGlWindow::initializeGL()
{
glewInit();
glClearColor(0.0f, 0.0f, 0.0f, 1.0f);
GLfloat verts[]=
{
+0.0f,+1.0f,
-1.0f,-1.0f
+1.0f,-1.0f,
};
GLuint myBufferID;
glGenBuffers(1, &myBufferID);
glBindBuffer(GL_ARRAY_BUFFER, myBufferID);
glBufferData(GL_ARRAY_BUFFER,sizeof(verts), verts, GL_STATIC_DRAW);
glEnableVertexAttribArray(0);
glVertexAttribPointer(0,2,GL_FLOAT,GL_FALSE,0,0);}
void MeGlWindow::paintGL()
{
glClear(GL_COLOR_BUFFER_BIT);
glDrawArrays(GL_TRIANGLES, 0,3);
}
++++++++++++++++++++++++++++++
main.cpp
#include <QApplication>
#include <QtGui/QGuiApplication>
#include "MeGlWindow.h"
int main(int argc, char** argv)
{
QApplication app(argc, argv);
MeGlWindow meWindow;
meWindow.resize(1024, 720);
meWindow.show();
return app.exec();
}
+++++++++++++++++++ -
Hi,
QGLWidget is deprecated but is still usable. As for QOpenGLWidget you can remove glew and use QOpenGLFunctions
Hope it helps
