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我使用QGLWidget編寫了一個小型的QT程序。目標是在永久旋轉中顯示一個簡單的三角形。問題是沒有動畫,因爲只是第一幀被渲染。Qt只是使用來自QT的QGLWidget繪製第一幀
這是我主要的C++源代碼:
#include "qtapplication.h"
#include <QtWidgets/QApplication>
int main(int argc, char *argv[])
{
QApplication a(argc, argv);
QtApplication w;
w.show();
return a.exec();
}
我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;
};
而且我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' 只是第一幀寫入。通常,自動調用paintGL。在這種情況下,我真的迷失了。有人可以幫我嗎?提前感謝您的幫助。
你可以請看看我的問題:(http://stackoverflow.com/questions/18391673/getting-error-using-svm-with-surf) – Rocket