我使用 QGLWidget 编写了一个小型 QT 程序。目标是在永久旋转中显示一个简单的三角形。问题是没有动画,因为只渲染了第一帧。
这是我的主要 C++ 源代码:
#include "qtapplication.h"
#include <QtWidgets/QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QtApplication w;
w.show();
return a.exec();
}
我的 qtapplication.h 文件:
include <QtWidgets/QMainWindow>
#include "ui_qtapplication.h"
#include "HSGLWidget.hpp"
class QtApplication : public QMainWindow
{
Q_OBJECT
public:
QtApplication(QWidget *parent = 0);
~QtApplication();
private:
Ui::QtApplicationClass ui;
HSGLWidget *_glwidget;
};
我的 qtapplication.cpp 文件:
#include "qtapplication.h"
QtApplication::QtApplication(QWidget *parent)
: QMainWindow(parent)
{
ui.setupUi(this);
this->_glwidget = NULL;
if (this->_glwidget == NULL)
this->_glwidget = new HSGLWidget();
this->_glwidget->setVisible(true);
setCentralWidget(this->_glwidget);
}
QtApplication::~QtApplication()
{
}
我的 HSGLWidjet.h 文件:
#include <QGLWidget>
class HSGLWidget : public QGLWidget {
Q_OBJECT
public:
explicit HSGLWidget(QWidget *parent = 0);
virtual ~HSGLWidget();
protected:
virtual void initializeGL();
virtual void resizeGL(int width, int height);
virtual void paintGL();
virtual void keyPressEvent(QKeyEvent *keyEvent);
private:
void _onSetup();
private:
QTimer *_timer;
};
还有我的 HSGLWidjet.cpp 文件:
#include <iostream>
#include "HSGLWidget.hpp"
float toto_angle = 0.0f;
HSGLWidget::HSGLWidget(QWidget *parent)
: QGLWidget(parent)
{
this->_onSetup();
}
HSGLWidget::~HSGLWidget(void)
{
}
void HSGLWidget::initializeGL()
{
glShadeModel(GL_SMOOTH);
glClearColor(0.0f, 0.20f, 0.0f, 0.0f);
glClearDepth(1.0f);
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_LEQUAL);
glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
}
void HSGLWidget::resizeGL(int width, int height)
{
if (height == 0)
height = 1;
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0f, (GLfloat)width / (GLfloat)height, 0.1f, 100.0f);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
void HSGLWidget::paintGL(void)
{
std::cout << "PAINTGL" << std::endl;
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glTranslatef(-1.5f, 0.0f, -6.0f);
glEnable(GL_MODELVIEW);
glPushMatrix();
glTranslatef(0.0f, 0.0f, 0.0f);
glRotatef(toto_angle, 1.0f, 1.0f, 1.0f);
glScalef(1.0f, 1.0f, 1.0f);
glBegin(GL_TRIANGLES);
glColor3ub(255, 0, 0);
glVertex3f(0.0f, 0.75f, 0.0f);
glColor3ub(0, 255, 0);
glVertex3f(-0.75f, 0.0f, 0.0f);
glColor3ub(0, 0, 255);
glVertex3f(0.75f, 0.0f, 0.0f);
glEnd();
toto_angle+=1.0f;
glPopMatrix();
}
void HSGLWidget::keyPressEvent(QKeyEvent *keyEvent)
{
}
void HSGLWidget::_onSetup()
{
}
字符串 'PAINTGL' 仅针对第一帧写入。通常,paintGL 会被自动调用。在这种情况面前,我真的很迷茫。有人可以帮助我吗?非常感谢您的帮助。