注意：

如果使用glVertex3f把頂點的坐標進行平移的話是一種非主流的方法；

一般使用glTranslatef進行操作，通過改變當前矩陣的坐標系來實現平移！

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程序運行截圖如下：

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上下平移：

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左右平移：

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前后平移：

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源碼如下：

myglwidget.h

#ifndef MYGLWIDGET_H #define MYGLWIDGET_H#include <QOpenGLWidget>class MyGLWidget:public QOpenGLWidget {Q_OBJECT public:MyGLWidget(QWidget *parent = 0);~MyGLWidget();void XCooridinateAdd();void XCooridinateSub();void YCooridinateAdd();void YCooridinateSub();void ZCooridinateAdd();void ZCooridinateSub();protected:void initializeGL() Q_DECL_OVERRIDE;void paintGL() Q_DECL_OVERRIDE;void resizeGL(int w, int h) Q_DECL_OVERRIDE;private:float m_x;float m_y;float m_z; };#endif // MYGLWIDGET_H

widget.h

#ifndef WIDGET_H #define WIDGET_H#include <QWidget>namespace Ui { class Widget; }class Widget : public QWidget {Q_OBJECTpublic:explicit Widget(QWidget *parent = 0);~Widget();private slots:void on_leftPushButton_clicked();void on_rightPushButton_clicked();void on_upPushButton_clicked();void on_downPushButton_clicked();void on_frontPushButton_clicked();void on_backPushButton_clicked();private:Ui::Widget *ui; };#endif // WIDGET_H

main.cpp

#include "widget.h" #include <QApplication>int main(int argc, char *argv[]) {QApplication a(argc, argv);Widget w;w.show();return a.exec(); }

myglwidget.cpp

#include "myglwidget.h" #include <GL/gl.h> #include <GL/glu.h>MyGLWidget::MyGLWidget(QWidget *parent):QOpenGLWidget(parent) {m_x=0.0;m_y=0.0;m_z=0.0; }MyGLWidget::~MyGLWidget() {}void MyGLWidget::XCooridinateAdd() {m_x+=0.1; }void MyGLWidget::XCooridinateSub() {m_x-=0.1; }void MyGLWidget::YCooridinateAdd() {m_y+=0.1; }void MyGLWidget::YCooridinateSub() {m_y-=0.1; }void MyGLWidget::ZCooridinateAdd() {m_z+=0.1; }void MyGLWidget::ZCooridinateSub() {m_z-=0.1; }void MyGLWidget::initializeGL() {glMatrixMode(GL_PROJECTION);gluPerspective(50.0f,800.0f/600.0f,0.1f,1000.0f);glMatrixMode(GL_MODELVIEW);glLoadIdentity(); }void MyGLWidget::paintGL() {glClearColor(30.0f /255.0f, 30.0f / 255.0f, 30.0f / 255.0f, 1.0f);glClear(GL_COLOR_BUFFER_BIT);glLoadIdentity();glTranslatef(m_x, m_y, m_z);glBegin(GL_TRIANGLES);glColor4ub(255, 0, 0, 255); glVertex3f(-0.5f, -0.25f, -1.0f);glColor4ub(0, 0, 255, 255); glVertex3f(0.5f, -0.25f, -1.0f);glColor4ub(0, 255, 0, 255); glVertex3f(0.0f, 0.5f, -1.0f);glEnd(); }void MyGLWidget::resizeGL(int w, int h) {Q_UNUSED(w)Q_UNUSED(h) }

widget.cpp

#include "widget.h" #include "ui_widget.h"Widget::Widget(QWidget *parent) :QWidget(parent),ui(new Ui::Widget) {ui->setupUi(this);this->setWindowTitle("CSDN IT1995"); }Widget::~Widget() {delete ui; }void Widget::on_leftPushButton_clicked() {ui->openGLWidget->XCooridinateSub();ui->openGLWidget->update(); }void Widget::on_rightPushButton_clicked() {ui->openGLWidget->XCooridinateAdd();ui->openGLWidget->update(); }void Widget::on_upPushButton_clicked() {ui->openGLWidget->YCooridinateAdd();ui->openGLWidget->update(); }void Widget::on_downPushButton_clicked() {ui->openGLWidget->YCooridinateSub();ui->openGLWidget->update(); }void Widget::on_frontPushButton_clicked() {ui->openGLWidget->ZCooridinateAdd();ui->openGLWidget->update(); }void Widget::on_backPushButton_clicked() {ui->openGLWidget->ZCooridinateSub();ui->openGLWidget->update(); }

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