[pre][pre][pre]运行时出现如下错误：
Starting E:\Qt\OpenGL\QtOpenGL\VowelCube-build-desktop\debug\VowelCube.exe...[/pre][/pre][/pre]
ASSERT: "d" in file ..\..\include/QtCore/../../src/corelib/tools/qscopedpointer.h, line 112
Invalid parameter passed to C runtime function.
Invalid parameter passed to C runtime function.
QWidget::repaint: Recursive repaint detected
ASSERT: "d" in file ..\..\include/QtCore/../../src/corelib/tools/qscopedpointer.h, line 112
Invalid parameter passed to C runtime function.
Invalid parameter passed to C runtime function.
不知道是什么原因，恳请各位高人相助，感激不尽！
[pre][pre][pre][pre][pre]下面是源代码[/pre][/pre][/pre][/pre][/pre]// vowelcube.h
#ifndef VOWELCUBE_H[pre]#define VOWELCUBE_H[/pre][pre]#include <QtCore>[/pre][pre]#include <QtGui>[/pre][pre]#include <QtOpenGL>[/pre][pre]class VowelCube : public QGLWidget[/pre][pre]{[/pre][pre] Q_OBJECT[/pre][pre]public:[/pre][pre] VowelCube(QWidget *parent = 0);[/pre][pre] ~VowelCube();[/pre][pre]protected:[/pre][pre] void paintEvent(QPaintEvent *e);[/pre][pre] void mousePressEvent(QMouseEvent *e);[/pre][pre] void mouseMoveEvent(QMouseEvent *e);[/pre][pre] void wheelEvent(QWheelEvent *e);[/pre][pre]private:[/pre][pre] void createGradient();[/pre][pre] void createGLObject();[/pre][pre] void drawBackground(QPainter *painter);[/pre][pre] void drawCube();[/pre][pre] void drawLegend(QPainter *painter);[/pre][pre] GLuint glObject;[/pre][pre] QRadialGradient gradient;[/pre][pre] GLfloat xrot, yrot, zrot;[/pre][pre] GLfloat scaling;[/pre][pre] QPoint lastPos;[/pre][pre]};[/pre][pre]#endif // VOWELCUBE_H[/pre][pre]
// vowelcube.cpp
#include <cmath>#include "vowelcube.h"#ifndef GL_MULTISAMPLE#define GL_MULTISAMPLE 0x809D#endifVowelCube::VowelCube(QWidget *parent) : QGLWidget(parent){ setFormat(QGLFormat(QGL::SampleBuffers)); xrot = -38.0; yrot = -58.0; zrot = 0.0; scaling = 1.0; createGradient(); createGLObject();}VowelCube::~VowelCube(){ makeCurrent(); glDeleteLists(glObject, 1);}void VowelCube::paintEvent(QPaintEvent *e){ QPainter painter(this); drawBackground(&painter); drawCube(); drawLegend(&painter);}void VowelCube::mousePressEvent(QMouseEvent *e){ lastPos = e->pos();}void VowelCube::mouseMoveEvent(QMouseEvent *e){ GLfloat dx = GLfloat(e->x() - lastPos.x()) / width(); GLfloat dy = GLfloat(e->y() - lastPos.y()) / height(); if (e->buttons() & Qt::LeftButton) { xrot += 180 * dy; yrot += 180 * dx; update(); } else if (e->buttons() & Qt::RightButton) { xrot += 180 * dy; zrot += 180 * dx; update(); } lastPos = e->pos();}void VowelCube::wheelEvent(QWheelEvent *e){ double numDegrees = -e->delta() / 8.0; double numSteps = numDegrees / 15.0; scaling *= std::pow(1.125, numSteps); update();}void VowelCube::createGradient(){ gradient.setCoordinateMode(QGradient::ObjectBoundingMode); gradient.setCenter(0.45, 0.50); gradient.setFocalPoint(0.40, 0.45); gradient.setColorAt(0.0, QColor(105, 146, 182)); gradient.setColorAt(0.4, QColor(81, 113, 150)); gradient.setColorAt(0.8, QColor(16, 56, 121));}void VowelCube::createGLObject(){ static const GLfloat vertex_list[8][3] = {{-1.0, -1.0, 1.0}, {1.0, -1.0, 1.0}, {1.0, 1.0, 1.0}, {-1.0, 1.0, 1.0}, {-1.0, -1.0, -1.0}, {1.0, -1.0, -1.0}, {1.0, 1.0, -1.0}, {-1.0, 1.0, -1.0}}; static const int vertex_index_list1[6] = {6, 7, 5, 4, 1, 0}; static const int vertex_index_list2[10] = {2, 6, 5, 1, 2, 3, 7, 4, 0, 3}; makeCurrent(); glShadeModel(GL_FLAT); glObject = glGenLists(1); glNewList(glObject, GL_COMPILE); { qglColor(QColor(255, 239, 191)); glLineWidth(1.0); glBegin(GL_LINES); { for (int i = 0; i < 6; i++) glVertex3fv(vertex_list[vertex_index_list1[i]]); } glEnd(); glBegin(GL_LINE_LOOP); { for (int i = 0; i < 10; i++) glVertex3fv(vertex_list[vertex_index_list2[i]]); } glEnd(); } glEndList();}void VowelCube::drawBackground(QPainter *painter){ painter->setPen(Qt::NoPen); painter->setBrush(gradient); painter->drawRect(rect());}void VowelCube::drawCube(){ glPushAttrib(GL_ALL_ATTRIB_BITS); glMatrixMode(GL_PROJECTION); glPushMatrix(); { glLoadIdentity(); GLfloat x = 3.0 * GLfloat(width()) / height(); glOrtho(-x, x, -3.0, 3.0, 4.0, 15.0); glMatrixMode(GL_MODELVIEW); glPushMatrix(); { glLoadIdentity(); glTranslatef(0.0, 0.0, -10.0); glScalef(scaling, scaling, scaling); glRotatef(xrot, 1.0, 0.0, 0.0); glRotatef(yrot, 0.0, 1.0, 0.0); glRotatef(zrot, 0.0, 0.0, 1.0); glEnable(GL_MULTISAMPLE); glCallList(glObject); setFont(QFont("Times", 24)); qglColor(QColor(255, 223, 127)); renderText(1.0, 1.0, 1.0, QChar('a')); renderText(-1.0, 1.0, 1.0, QChar('e')); renderText(1.0, 1.0, -1.0, QChar('o')); renderText(-1.0, 1.0, -1.0, QChar(0x00F6)); renderText(1.0, -1.0, 1.0, QChar(0x0131)); renderText(-1.0, -1.0, 1.0, QChar('i')); renderText(1.0, -1.0, -1.0, QChar('u')); renderText(-1.0, -1.0, -1.0, QChar(0x00FC)); glMatrixMode(GL_MODELVIEW); } glPopMatrix(); glMatrixMode(GL_PROJECTION); } glPopMatrix(); glPopAttrib();}void VowelCube::drawLegend(QPainter *painter){ const int Margin = 11; const int Padding = 6; QTextDocument textDocument; textDocument.setDefaultStyleSheet("* { color: #FFEFEF }"); textDocument.setHtml("<h4 align=\"center\">Vowel Categories</h4>" "<p align=\"center\"><table width=\"100%\">" "<tr><td>Open:<td>a<td>e<td>o<td>ö" "<tr><td>Close:<td>ı<td>i<td>u<td>ü" "<tr><td>Front:<td>e<td>i<td>ö<td>ü" "<tr><td>Back:<td>a<td>ı<td>o<td>u" "<tr><td>Round:<td>o<td>ö<td>u<td>ü" "<tr><td>Unround:<td>a<td>e<td>ı<td>i" "</table>"); textDocument.setTextWidth(textDocument.size().width()); QRect rect(QPoint(0, 0), textDocument.size().toSize() + QSize(2 * Padding, 2 * Padding)); painter->translate(width() - rect.width() - Margin, height() - rect.height() - Margin); painter->setPen(QColor(255, 239, 239)); painter->setBrush(QColor(255, 0, 0, 31)); painter->drawRect(rect); painter->translate(Padding, Padding); textDocument.drawContents(painter);}[pre]
// main.cpp
#include <QtGui/QApplication>#include "vowelcube.h"int main(int argc, char *argv[]){ QApplication a(argc, argv); if (!QGLFormat::hasOpenGL()) { QMessageBox::warning(0, "Fatal Error!", "This system has no OpenGL support!"); return -1; } VowelCube w; w.setWindowTitle(QObject::tr("Vowel Cube")); w.setMinimumSize(200, 200); w.resize(500, 500); w.show(); return a.exec();}[pre]
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