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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#ifndef GLWIDGET_H
#define GLWIDGET_H
#include <QOpenGLWidget>
#include <QOpenGLFunctions>
#include <QOpenGLBuffer>
#include <QVector3D>
#include <QMatrix4x4>
#include <QElapsedTimer>
#include <QList>
#include <QPushButton>
QT_FORWARD_DECLARE_CLASS(QOpenGLTexture)
QT_FORWARD_DECLARE_CLASS(QOpenGLShader)
QT_FORWARD_DECLARE_CLASS(QOpenGLShaderProgram)
class GLWidget : public QOpenGLWidget, protected QOpenGLFunctions
{
Q_OBJECT
public:
GLWidget(const QColor &background);
~GLWidget();
void saveImage(QOpenGLWidget::TargetBuffer targetBuffer);
protected:
void paintGL() override;
void initializeGL() override;
private:
void createGeometry();
void quad(qreal x1, qreal y1, qreal x2, qreal y2, qreal x3, qreal y3, qreal x4, qreal y4);
void extrude(qreal x1, qreal y1, qreal x2, qreal y2);
void reset();
QList<QVector3D> m_vertices;
QList<QVector3D> m_normals;
QOpenGLShader *m_vshader = nullptr;
QOpenGLShader *m_fshader = nullptr;
QOpenGLShaderProgram *m_program = nullptr;
QOpenGLBuffer m_vbo;
int m_vertexAttr;
int m_normalAttr;
int m_matrixUniform;
QColor m_background;
QMetaObject::Connection m_contextWatchConnection;
};
#endif
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