当我单步执行调试器时,会收到以下弹出消息:
The inferior stopped because it received a signal from the Operating System.
Signal name :
SIGSEGV
Signal meaning :
Segmentation fault
这依赖于(我认为)这些代码行:
#ifndef Q_WS_WINCE
inline void show() { setVisible(true); }
#else
void show();
#endif
inline void hide() { setVisible(false); }
inline QT_MOC_COMPAT void setShown(bool shown) { setVisible(shown); }
据我所知,Q_WS_WINCE
未定义,但我无法通过Google找到其背后的定义; this是我能找到的最接近的,虽然它没有CE
定义。
根据我的调试器,这是被调用的内容,因为#ifndef Q_WS_WINCE
函数调用时箭头跟inline void show() { setVisible(true); }
之后。
我不知道如何发生这种情况;这里发生了什么?我正在使用Ubuntu 11.10,以及Qt Creator作为我的IDE。我还应该注意到,这只是在几分钟前开始发生的;在没有任何问题之前,我能够逐步完成我的大部分代码。
GLWidget标题文件
#pragma once
#include <QGLWidget>
#include <QInputEvent>
#include "Cube.h"
class GLWidget : public QGLWidget
{
Q_OBJECT
public:
explicit GLWidget( QWidget *parent = 0 );
~GLWidget( void );
QSize minimumSizeHint( void ) const;
QSize sizeHint( void ) const;
public slots:
void SetXRotation( int angle );
void SetYRotation( int angle );
void SetZRotation( int angle );
signals:
void xRotationChanged( int angle );
void yRotationChanged( int angle );
void zRotationChanged( int angle );
protected:
void initializeGL( void );
void paintGL( void );
void resizeGL( int width, int height );
void mousePressEvent( QMouseEvent *event );
void mouseMoveEvent( QMouseEvent *event );
private:
Cube *mCube;
int mXRot;
int mYRot;
int mZRot;
QPoint mLastPos;
QColor mQtGreen;
QColor mQtPurple;
};
GLWidget源文件
#include <GL/freeglut.h>
#include <QtGui>
#include <QtOpenGL>
#include <qmath.h>
#include <QMatrix4x4>
#include "GLWidget.h"
#ifndef GL_MULTISAMPLE
#define GL_MULTISAMPLE 0x809D
#endif
static void qNormalizeAngle( int &angle )
{
const int ANGLE_MULTIPLIER = 360 * 16;
while( angle < 0 )
angle += ANGLE_MULTIPLIER;
while ( angle > ANGLE_MULTIPLIER )
angle -= ANGLE_MULTIPLIER;
}
GLWidget::GLWidget( QWidget *parent ) :
QGLWidget( parent ),
mXRot( 0 ),
mYRot( 0 ),
mZRot( 0 )
{
}
GLWidget::~GLWidget( void )
{
delete mCube;
}
void GLWidget::initializeGL( void )
{
mQtGreen = QColor::fromCmyk( 0.40, 0.0, 1.0, 0.0 );
mQtPurple = QColor::fromCmyk( 0.39, 0.39, 0.0, 0.0 );
//glutInitDisplayMode( GLUT_RGBA | GLUT_DEPTH );
qglClearColor( mQtPurple );
mCube = new Cube( this );
mCube->Init();
mCube->SetColor( mQtGreen.dark() );
glEnable( GL_DEPTH_TEST );
glEnable( GL_CULL_FACE );
glShadeModel( GL_SMOOTH );
glEnable( GL_LIGHTING );
glEnable( GL_LIGHT0 );
glEnable( GL_MULTISAMPLE );
static GLfloat lightPosition[4] = { 0.5, 5.0, 7.0, 1.0 };
glLightfv( GL_LIGHT0, GL_POSITION, lightPosition );
}
QSize GLWidget::minimumSizeHint( void ) const
{
return QSize( 50, 50 );
}
void GLWidget::mouseMoveEvent( QMouseEvent *event )
{
mLastPos = event->pos();
}
void GLWidget::mousePressEvent( QMouseEvent *event )
{
static const int ANGLE_ADDIFIER = 8;
int dx = event->x() - mLastPos.x();
int dy = event->y() - mLastPos.y();
if ( event->buttons() & Qt::LeftButton )
{
SetXRotation( ( mXRot + ANGLE_ADDIFIER ) * dy );
SetYRotation( ( mYRot + ANGLE_ADDIFIER ) * dx );
qDebug() << "You pressed the left mouse button!" << '\n';
}
else if ( event->buttons() & Qt::RightButton )
{
SetXRotation( ( mXRot + ANGLE_ADDIFIER ) * dy );
SetZRotation( ( mZRot + ANGLE_ADDIFIER ) * dx );
qDebug() << "You pressed the right mouse button!" << '\n';
}
mLastPos = event->pos();
}
void GLWidget::paintGL( void )
{
static const GLfloat ANGLE_DIVISOR = 16.0;
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glLoadIdentity();
glTranslatef( 0.0, 0.0, -10.0 );
glRotatef( mXRot / ANGLE_DIVISOR, 1.0, 0.0, 0.0 );
glRotatef( mYRot / ANGLE_DIVISOR, 0.0, 1.0, 0.0 );
glRotatef( mZRot / ANGLE_DIVISOR, 0.0, 0.0, 1.0 );
mCube->Draw();
}
void GLWidget::resizeGL( int width, int height )
{
int side = qMin( width, height );
//glutInitWindowPosition( 0, 0 );
//glutInitWindowSize( width, height );
glViewport( ( width - side ) / VIEWPORT_DIVISOR, ( height - side ) / VIEWPORT_DIVISOR, side, side );
glMatrixMode( GL_PROJECTION );
glLoadIdentity();
#ifdef QT_OPENGL_ES_1
glOrthof( -0.5, +0.5, -0.5, +0.5, 4.0, 15.0 );
#else
glOrtho( -0.5, +0.5, -0.5, +0.5, 4.0, 15.0 );
#endif*/
glMatrixMode( GL_MODELVIEW );
}
void GLWidget::SetXRotation( int angle )
{
qNormalizeAngle( angle );
if ( angle != mYRot )
{
mYRot = angle;
emit yRotationChanged( angle );
updateGL();
}
}
void GLWidget::SetYRotation( int angle )
{
qNormalizeAngle( angle );
if ( angle != mXRot )
{
mXRot = angle;
emit xRotationChanged( angle );
updateGL();
}
}
void GLWidget::SetZRotation( int angle )
{
qNormalizeAngle( angle );
if ( angle != mZRot )
{
mZRot = angle;
emit zRotationChanged( angle );
updateGL();
}
}
QSize GLWidget::sizeHint() const
{
return QSize( 400, 400 );
}
答案 0 :(得分:0)
找到了罪魁祸首:我有一个mCube->Init();
函数调用,它在代码中的某处放错了位置。现在应该考虑解决这个问题。