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initial camera-orientation; multiple materials in a single element; default material used from IfcGeom; improved triangle node data generation for OSG

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This commit is contained in:
dushyant basson
2023-09-14 12:36:45 +05:30
committed by Thomas Krijnen
parent e4ce53d548
commit 832618b84a
4 changed files with 167 additions and 150 deletions
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src/qtviewer/IfcViewerWidget.cpp
+53 -23
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@@ -12,6 +12,7 @@
#include "MessageLogger.h"
#include "osg/Geode"
#include "osg/Geometry"
#include "osg/StateSet"
#include "osg/Vec3"
#include "osg/ref_ptr"
#include "osgGA/TrackballManipulator"
@@ -26,11 +27,11 @@ IfcViewerWidget::IfcViewerWidget(qreal dpiScale, QWidget *parent) :
m_viewer(new osgViewer::Viewer),
root(new osg::Group)
{
m_mouseHandler = new osgGA::TrackballManipulator;
m_clearColor = osg::Vec4(0.7, 0.7, 0.7, 1.0);
m_clearColor = osg::Vec4(0.8, 0.8, 0.8, 1.0);
//debug - override
//std::string filePath = "/Users/onizudb/Downloads/IFC/wallAtOrigin.ifc";
//std::string filePath = "/Users/onizudb/Downloads/IFC/FromAC_IFC4ref.ifc";
//this->loadFile(filePath);
}
@@ -50,13 +51,8 @@ void IfcViewerWidget::initializeGL()
m_viewer->getCamera()->setClearColor(m_clearColor);
m_viewer->getCamera()->setGraphicsContext(m_graphicsWindow);
// Add event handlers
this->setMouseTracking(false);
m_mouseHandler->setAllowThrow(false);
m_viewer->setCameraManipulator(m_mouseHandler);
// set camera manipulator, etc.
setupViewController();
m_viewer->setThreadingModel(osgViewer::Viewer::SingleThreaded);
m_viewer->realize();
@@ -136,6 +132,14 @@ unsigned int IfcViewerWidget::getMouseButtonNum(QMouseEvent* event)
return button;
}
void IfcViewerWidget::setupViewController()
{
setMouseTracking(false);
m_mouseHandler = new osgGA::TrackballManipulator;
m_mouseHandler->setAllowThrow(false);
m_viewer->setCameraManipulator(m_mouseHandler);
}
void IfcViewerWidget::loadFile(const std::string& filePath)
{
std::vector<osg::ref_ptr<osg::Geometry>> geometries;
@@ -152,19 +156,45 @@ void IfcViewerWidget::loadFile(const std::string& filePath)
geode->addDrawable(geometry);
}
prepareSceneWithGeometry(geode);
m_viewer->setCameraManipulator(m_mouseHandler);
}
void IfcViewerWidget::prepareSceneWithGeometry(osg::ref_ptr<osg::Geode> geode)
{
// Apply a rotation to the model
// MatrixTransform allows applying transformations (translation, rotation, scaling) to its children
osg::ref_ptr<osg::MatrixTransform> rotationTransform = new osg::MatrixTransform;
rotationTransform->setMatrix(osg::Matrix::rotate(osg::DegreesToRadians(45.0), osg::Vec3(0.0, 0.0, 1.0)));
rotationTransform->addChild(geode);
// Add the model to the root node
root->addChild(rotationTransform);
root->addChild(geode);
// set initial camera position
orientScene(geode);
}
void IfcViewerWidget::orientScene(osg::ref_ptr<osg::Geode> geode)
{
// Get the bounding-box
osg::ComputeBoundsVisitor cbv;
geode->accept(cbv);
//root.get()->accept(cbv);
const osg::BoundingBox& bb = cbv.getBoundingBox();
// Center (average of opposite corners of bb)
osg::Vec3d center = (bb.corner(0) + bb.corner(7)) * 0.5;
// Radius (distance between the center and the corner)
// assuming corner(7) has maximum x,y,z coords
float radius = (bb.corner(7) - center).length();
// Calc. eye position
osg::Vec3d eye = center + osg::Vec3d(radius * 3, -radius * 3, 0.0);
osg::Vec3d up = osg::Vec3d(0.0, 0.0, 1.0);
// Set the camera's view matrix
// In case a cameraManipulator is set, lookAt position setting does not work on the camera
// as it is overridden.
// So set it on the manipulator and reapply it to the viewer
m_mouseHandler->setHomePosition(eye, center, up);
m_viewer->setCameraManipulator(m_mouseHandler);
auto log = [center, radius, eye]() {
MessageLogger::log("center: " + std::to_string(center.length()));
MessageLogger::log("radius: " + std::to_string(radius));
MessageLogger::log("center: " + std::to_string(center.x()) + ", " + std::to_string(center.y()) + ", " + std::to_string(center.z()));
MessageLogger::log("eye: " + std::to_string(eye.x()) + ", " + std::to_string(eye.y()) + ", " + std::to_string(eye.z()));
};
//log();
}