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#include "ogrewidget.h"
#include "declarativeviewtexture.h"
#include "cameranodeobject.h"
#include <OgreRoot.h>
#include <OgreRenderWindow.h>
#include <OgreColourValue.h>
#include <OgreWindowEventUtilities.h>
#include <OgreSceneNode.h>
#include <OgreEntity.h>
#include <OgreResourceGroupManager.h>
#include <OgreMaterialManager.h>
#include <QtDeclarative/QDeclarativeContext>
#include <QtCore/QDebug>
#if defined(Q_WS_X11)
#include <QX11Info>
#endif
OgreWidget::OgreWidget(QWidget *parent) :
QGLWidget(parent),
m_root(0),
m_camera(0),
m_sceneManager(0),
m_renderWindow(0),
m_viewport(0),
m_cameraObject(0),
m_QmlUI(0)
{
setAutoBufferSwap(false);
setFormat(QGLFormat(QGL::DoubleBuffer | QGL::SampleBuffers));
setAttribute(Qt::WA_OpaquePaintEvent);
resize(1024, 768);
startTimer(16);
}
OgreWidget::~OgreWidget()
{
if (m_renderWindow) {
m_renderWindow->removeAllViewports();
}
if (m_root) {
m_root->detachRenderTarget(m_renderWindow);
if (m_sceneManager) {
m_root->destroySceneManager(m_sceneManager);
}
}
delete m_root;
delete m_cameraObject;
}
void OgreWidget::paintGL()
{
// Render Ogre
Ogre::WindowEventUtilities::messagePump();
m_root->renderOneFrame();
// Set a clear pass to give the renderer a clear renderstate
static Ogre::Pass* clearPass = 0;
if (!clearPass)
{
Ogre::MaterialPtr clearMat = Ogre::MaterialManager::getSingleton().getByName("BaseWhite");
clearPass = clearMat->getTechnique(0)->getPass(0);
}
m_sceneManager->_setPass(clearPass, true, false);
// Render the QDeclarativeView texture on top
glBindTexture(GL_TEXTURE_2D, m_QmlUI->textureId());
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glEnable(GL_TEXTURE_2D);
glDisable(GL_LIGHTING);
glEnable(GL_BLEND);
glEnable(GL_DEPTH_TEST);
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
float top = (rect().center().y() - m_QmlUI->pos().y()) / float(rect().center().y());
float left = (rect().center().x() - m_QmlUI->pos().x()) / float(-rect().center().x());
float bottom = (rect().center().y() - m_QmlUI->pos().y() - m_QmlUI->height()) / float(rect().center().y());
float right = (rect().center().x() - m_QmlUI->pos().x() - m_QmlUI->width()) / float(-rect().center().x());
glBegin(GL_QUADS);
glTexCoord2f(0, 0); glVertex3f(left, top, -1.0f); // Top Left
glTexCoord2f(0, 1); glVertex3f(left, bottom, -1.0f); // Bottom Left
glTexCoord2f(1, 1); glVertex3f(right, bottom, -1.0f); // Bottom Right
glTexCoord2f(1, 0); glVertex3f(right, top, -1.0f); // Top Right
glEnd();
glBindTexture(GL_TEXTURE_2D, 0);
}
void OgreWidget::timerEvent(QTimerEvent *e)
{
Q_UNUSED(e)
paintGL();
swapBuffers();
}
void OgreWidget::initializeGL()
{
initOgre();
m_QmlUI = new DeclarativeViewTexture(this);
m_QmlUI->setResizeMode(QDeclarativeView::SizeRootObjectToView);
m_QmlUI->setSource(QUrl("resources/example.qml"));
m_QmlUI->rootContext()->setContextProperty("Camera", m_cameraObject);
m_QmlUI->rootContext()->setContextProperty("Window", this);
}
void OgreWidget::resizeGL(int w, int h)
{
if (m_renderWindow) {
m_renderWindow->resize(w, h);
m_renderWindow->windowMovedOrResized();
}
if (m_camera) {
Ogre::Real aspectRatio = Ogre::Real(w) / Ogre::Real(h);
m_camera->setAspectRatio(aspectRatio);
}
if (m_QmlUI) {
m_QmlUI->resize(w, h);
}
}
void OgreWidget::initOgre()
{
m_root = new Ogre::Root;
m_root->loadPlugin(Ogre::String(OGRE_PLUGIN_DIR) + "/RenderSystem_GL");
Ogre::RenderSystem *renderSystem = m_root->getRenderSystemByName("OpenGL Rendering Subsystem");
m_root->setRenderSystem(renderSystem);
m_root->initialise(false);
Ogre::NameValuePairList params;
Ogre::String externalWindowHandleParams;
#if defined(Q_WS_WIN)
//positive integer for W32 (HWND handle) - According to Ogre Docs
externalWindowHandleParams = Ogre::StringConverter::toString((unsigned int)(winId()));
#endif
#if defined(Q_WS_X11)
QX11Info info = x11Info();
externalWindowHandleParams = Ogre::StringConverter::toString((unsigned long)(info.display()));
externalWindowHandleParams += ":";
externalWindowHandleParams += Ogre::StringConverter::toString((unsigned int)(info.screen()));
externalWindowHandleParams += ":";
externalWindowHandleParams += Ogre::StringConverter::toString((unsigned long)(winId()));
#endif
//Add the external window handle parameters to the existing params set.
#if defined(Q_WS_WIN)
params["externalWindowHandle"] = externalWindowHandleParams;
#endif
#if defined(Q_WS_X11)
params["parentWindowHandle"] = externalWindowHandleParams;
#endif
params["externalGLControl"] = "true";
params["currentGLContext"] = "true";
//Finally create our window.
m_renderWindow = m_root->createRenderWindow("OgreWindow", width(), height(), false, ¶ms);
m_renderWindow->setVisible(true);
// Load resources
Ogre::ResourceGroupManager::getSingleton().addResourceLocation("resources/data.zip", "Zip");
Ogre::ResourceGroupManager::getSingleton().initialiseAllResourceGroups();
// Setup scene
m_sceneManager = m_root->createSceneManager(Ogre::ST_GENERIC, "mySceneManager");
m_camera = m_sceneManager->createCamera("myCamera");
m_camera->setNearClipDistance(1);
m_camera->setFarClipDistance(99999);
m_viewport = m_renderWindow->addViewport(m_camera);
m_viewport->setBackgroundColour(Ogre::ColourValue(1, 1, 1));
m_viewport->setClearEveryFrame(true);
m_camera->setAspectRatio(Ogre::Real(width()) / Ogre::Real(height()));
// Setup content...
// Set a sky dome
m_sceneManager->setSkyBox(true, "SpaceSkyBox", 10000);
// setup some basic lighting for our scene
m_sceneManager->setAmbientLight(Ogre::ColourValue(0.3, 0.3, 0.3));
m_sceneManager->createLight()->setPosition(20, 80, 50);
// create an ogre head entity and place it at the origin
m_sceneManager->getRootSceneNode()->attachObject(m_sceneManager->createEntity("Head", "ogrehead.mesh"));
// Setup the camera
m_cameraObject = new CameraNodeObject(m_camera);
m_cameraObject->camera()->setAutoTracking(true, m_sceneManager->getRootSceneNode());
}
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