qtk/example-app/examplewidget.cpp

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/*##############################################################################
## Author: Shaun Reed ##
## Legal: All Content (c) 2023 Shaun Reed, all rights reserved ##
## About: Example Qtk widget ##
## ##
## Contact: shaunrd0@gmail.com | URL: www.shaunreed.com | GitHub: shaunrd0 ##
##############################################################################*/
#include <qtk/scene.h>
#include "examplewidget.h"
ExampleWidget::ExampleWidget(QWidget * parent) :
QOpenGLWidget(parent), mScene(new ExampleScene(new Qtk::SceneEmpty)) {
// NOTE: The decorator pattern is used to save / load scenes in Qtk currently.
// The initializer above sets mScene to the concrete decorator ExampleScene.
// Qtk::SceneEmpty provides an empty scene as the concrete component.
// ExampleScene is defined in client source, deriving Qtk::SceneInterface.
QSurfaceFormat format;
format.setRenderableType(QSurfaceFormat::OpenGL);
format.setProfile(QSurfaceFormat::CoreProfile);
format.setVersion(4, 6);
format.setSamples(4);
format.setDepthBufferSize(16);
setFormat(format);
setFocusPolicy(Qt::ClickFocus);
}
void ExampleWidget::initializeGL() {
initializeOpenGLFunctions();
connect(this, SIGNAL(frameSwapped()), this, SLOT(update()));
glEnable(GL_MULTISAMPLE);
glEnable(GL_DEPTH_TEST);
glDepthMask(GL_TRUE);
glDepthFunc(GL_LEQUAL);
glDepthRange(0.1f, 1.0f);
glClearDepth(1.0f);
glClearColor(0.0f, 0.25f, 0.0f, 0.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
}
void ExampleWidget::resizeGL(int width, int height) {
Qtk::Scene::getProjectionMatrix().setToIdentity();
Qtk::Scene::getProjectionMatrix().perspective(
45.0f, float(width) / float(height), 0.1f, 1000.0f);
}
void ExampleWidget::paintGL() {
glClear(GL_DEPTH_BUFFER_BIT | GL_COLOR_BUFFER_BIT);
mScene->draw();
}
void ExampleWidget::update() {
mScene->update();
QWidget::update();
}