354 lines
9.9 KiB
C++
354 lines
9.9 KiB
C++
/*##############################################################################
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## Author: Shaun Reed ##
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## Legal: All Content (c) 2021 Shaun Reed, all rights reserved ##
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## About: Main window for Qt5 OpenGL widget application ##
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## ##
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## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com | GitHub: shaunrd0 ##
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##############################################################################*/
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#include <QKeyEvent>
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#include <input.h>
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#include <mesh.h>
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#include <object.h>
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#include <scene.h>
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#include <mainwidget.h>
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/*******************************************************************************
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* Constructors, Destructors
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******************************************************************************/
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MainWidget::MainWidget() : mDebugLogger(Q_NULLPTR)
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{
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QSurfaceFormat format;
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format.setRenderableType(QSurfaceFormat::OpenGL);
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format.setProfile(QSurfaceFormat::CoreProfile);
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format.setVersion(4, 5);
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format.setDepthBufferSize(16);
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// If QTK_DEBUG is set, enable debug context
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#ifdef QTK_DEBUG
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format.setOption(QSurfaceFormat::DebugContext);
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#endif
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}
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MainWidget::MainWidget(const QSurfaceFormat &format)
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: mDebugLogger(Q_NULLPTR)
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{
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setFormat(format);
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resize(QSize(800, 600));
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show();
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}
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MainWidget::~MainWidget()
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{
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makeCurrent();
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teardownGL();
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}
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/*******************************************************************************
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* Private Member Functions
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******************************************************************************/
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void MainWidget::teardownGL()
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{
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// Nothing to teardown yet...
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}
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void MainWidget::initObjects()
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{
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mScene = new Scene;
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// Drawing a primitive object using Qt and OpenGL
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// The Object class only stores basic QOpenGL* members and shape data
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// + Within mainwidget, mObject serves as a basic QOpenGL example
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mObject = new Object("testObject");
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mObject->setVertices(Cube(QTK_DRAW_ELEMENTS).vertices());
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mObject->setIndices(Cube(QTK_DRAW_ELEMENTS).indices());
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mObject->mProgram.create();
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mObject->mProgram.addShaderFromSourceFile(QOpenGLShader::Vertex,
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":/solid-ambient.vert");
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mObject->mProgram.addShaderFromSourceFile(QOpenGLShader::Fragment,
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":/solid-ambient.frag");
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mObject->mProgram.link();
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mObject->mProgram.bind();
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mObject->mVAO.create();
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mObject->mVAO.bind();
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mObject->mVBO.create();
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mObject->mVBO.setUsagePattern(QOpenGLBuffer::StaticDraw);
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mObject->mVBO.bind();
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mObject->mVBO.allocate(mObject->vertices().data(),
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mObject->vertices().size()
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* sizeof(mObject->vertices()[0]));
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mObject->mProgram.enableAttributeArray(0);
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mObject->mProgram.setAttributeBuffer(0, GL_FLOAT, 0,
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3, sizeof(mObject->vertices()[0]));
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mObject->mProgram.setUniformValue("uColor", QVector3D(0.0f, 0.25f, 0.0f));
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mObject->mProgram.setUniformValue("uLightColor", WHITE);
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mObject->mProgram.setUniformValue("uAmbientStrength", 0.2f);
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mObject->mVBO.release();
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mObject->mVAO.release();
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mObject->mProgram.release();
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mObject->mTransform.setTranslation(13.0f, 0.0f, -2.0f);
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}
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/*******************************************************************************
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* Inherited Virtual Member Functions
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******************************************************************************/
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void MainWidget::paintGL()
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{
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// Clear buffers
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glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
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// Draw the scene first, since it handles drawing our skybox
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mScene->draw();
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// Draw any additional objects within mainwidget manually
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mObject->mProgram.bind();
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mObject->mVAO.bind();
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mObject->mProgram.setUniformValue("uModel", mObject->mTransform.toMatrix());
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mObject->mProgram.setUniformValue("uView", Scene::Camera().toMatrix());
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mObject->mProgram.setUniformValue("uProjection", Scene::Projection());
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glDrawElements(GL_TRIANGLES, mObject->indices().size(),
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GL_UNSIGNED_INT, mObject->indices().data());
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mObject->mVAO.release();
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mObject->mProgram.release();
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}
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void MainWidget::initializeGL()
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{
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initializeOpenGLFunctions();
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// Connect the frameSwapped signal to call the update() function
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connect(this, SIGNAL(frameSwapped()), this, SLOT(update()));
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// Initialize OpenGL debug context
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#ifdef QTK_DEBUG
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mDebugLogger = new QOpenGLDebugLogger(this);
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if (mDebugLogger->initialize()) {
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qDebug() << "GL_DEBUG Debug Logger" << mDebugLogger << "\n";
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connect(mDebugLogger, SIGNAL(messageLogged(QOpenGLDebugMessage)),
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this, SLOT(messageLogged(QOpenGLDebugMessage)));
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mDebugLogger->startLogging();
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}
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#endif // QTK_DEBUG
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printContextInformation();
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// Initialize opengl settings
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glEnable(GL_MULTISAMPLE);
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glEnable(GL_DEPTH_TEST);
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glDepthMask(GL_TRUE);
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glDepthFunc(GL_LEQUAL);
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glDepthRange(0.1f, 1.0f);
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glClearDepth(1.0f);
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glClearColor(0.0f, 0.25f, 0.0f, 0.0f);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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// Initialize default objects within the scene
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initObjects();
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}
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void MainWidget::resizeGL(int width, int height)
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{
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Scene::Projection().setToIdentity();
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Scene::Projection().perspective(45.0f,
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float(width) / float(height),
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0.1f, 1000.0f);
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}
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/*******************************************************************************
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* Protected Slots
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******************************************************************************/
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void MainWidget::update()
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{
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updateCameraInput();
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mScene->update();
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QWidget::update();
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}
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void MainWidget::messageLogged(const QOpenGLDebugMessage &msg)
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{
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QString error;
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// Format based on severity
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switch (msg.severity())
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{
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case QOpenGLDebugMessage::NotificationSeverity:
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error += "--";
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break;
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case QOpenGLDebugMessage::HighSeverity:
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error += "!!";
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break;
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case QOpenGLDebugMessage::MediumSeverity:
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error += "!~";
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break;
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case QOpenGLDebugMessage::LowSeverity:
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error += "~~";
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break;
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}
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error += " (";
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// Format based on source
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#define CASE(c) case QOpenGLDebugMessage::c: error += #c; break
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switch (msg.source())
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{
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CASE(APISource);
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CASE(WindowSystemSource);
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CASE(ShaderCompilerSource);
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CASE(ThirdPartySource);
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CASE(ApplicationSource);
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CASE(OtherSource);
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CASE(InvalidSource);
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}
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#undef CASE
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error += " : ";
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// Format based on type
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#define CASE(c) case QOpenGLDebugMessage::c: error += #c; break
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switch (msg.type())
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{
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CASE(InvalidType);
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CASE(ErrorType);
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CASE(DeprecatedBehaviorType);
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CASE(UndefinedBehaviorType);
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CASE(PortabilityType);
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CASE(PerformanceType);
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CASE(OtherType);
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CASE(MarkerType);
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CASE(GroupPushType);
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CASE(GroupPopType);
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}
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#undef CASE
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error += ")";
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qDebug() << qPrintable(error) << "\n" << qPrintable(msg.message()) << "\n";
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}
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/*******************************************************************************
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* Protected Helpers
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******************************************************************************/
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void MainWidget::keyPressEvent(QKeyEvent *event)
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{
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if (event->isAutoRepeat()) {
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event->ignore();
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} else {
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Input::registerKeyPress(event->key());
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}
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}
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void MainWidget::keyReleaseEvent(QKeyEvent *event)
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{
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if (event->isAutoRepeat()) {
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event->ignore();
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} else {
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Input::registerKeyRelease(event->key());
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}
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}
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void MainWidget::mousePressEvent(QMouseEvent *event)
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{
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Input::registerMousePress(event->button());
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}
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void MainWidget::mouseReleaseEvent(QMouseEvent *event)
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{
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Input::registerMouseRelease(event->button());
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}
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/*******************************************************************************
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* Private Helpers
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******************************************************************************/
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void MainWidget::printContextInformation()
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{
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QString glType;
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QString glVersion;
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QString glProfile;
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QString glVendor;
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QString glRenderer;
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// Get Version Information
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glType = (context()->isOpenGLES()) ? "OpenGL ES" : "OpenGL";
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glVersion = reinterpret_cast<const char *>(glGetString(GL_VERSION));
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glVendor =
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reinterpret_cast<const char *>(glGetString(GL_VENDOR));
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glRenderer =
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reinterpret_cast<const char *>(glGetString(GL_RENDERER));
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// Get Profile Information
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#define CASE(c) case QSurfaceFormat::c: glProfile = #c; break
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switch (format().profile()) {
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CASE(NoProfile);
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CASE(CoreProfile);
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CASE(CompatibilityProfile);
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}
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#undef CASE
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// qPrintable() will print our QString w/o quotes around it.
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qDebug() << qPrintable(glType) << qPrintable(glVersion) << "("
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<< qPrintable(glProfile) << ")"
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<< "\nOpenGL Vendor: " << qPrintable(glVendor)
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<< "\nRendering Device: " << qPrintable(glRenderer) << "\n";
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}
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void MainWidget::updateCameraInput()
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{
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Input::update();
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// Camera Transformation
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if (Input::buttonPressed(Qt::RightButton)) {
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static const float transSpeed = 0.1f;
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static const float rotSpeed = 0.5f;
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// Handle rotations
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Scene::Camera().transform().rotate(-rotSpeed * Input::mouseDelta().x(),
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Camera3D::LocalUp);
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Scene::Camera().transform().rotate(-rotSpeed * Input::mouseDelta().y(),
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Scene::Camera().right());
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// Handle translations
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QVector3D translation;
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if (Input::keyPressed(Qt::Key_W)) {
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translation += Scene::Camera().forward();
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}
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if (Input::keyPressed(Qt::Key_S)) {
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translation -= Scene::Camera().forward();
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}
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if (Input::keyPressed(Qt::Key_A)) {
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translation -= Scene::Camera().right();
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}
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if (Input::keyPressed(Qt::Key_D)) {
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translation += Scene::Camera().right();
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}
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if (Input::keyPressed(Qt::Key_Q)) {
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translation -= Scene::Camera().up() / 2.0f;
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}
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if (Input::keyPressed(Qt::Key_E)) {
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translation += Scene::Camera().up() / 2.0f;
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}
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Scene::Camera().transform().translate(transSpeed * translation);
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}
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}
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