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factored out mouse picking into a separate function

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This commit is contained in:
Marc Zinnschlag 2015-09-26 17:51:41 +02:00
parent 3844c94975
commit 501ae6372d
2 changed files with 57 additions and 44 deletions
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97
apps/opencs/view/render/worldspacewidget.cpp
View File

@ -347,6 +347,53 @@ bool CSVRender::WorldspaceWidget::storeMappingSetting (const QString& key, const
return false;
}
osg::ref_ptr<CSVRender::TagBase> CSVRender::WorldspaceWidget::mousePick (QMouseEvent *event)
{
// (0,0) is considered the lower left corner of an OpenGL window
int x = event->x();
int y = height() - event->y();
osg::ref_ptr<osgUtil::LineSegmentIntersector> intersector (new osgUtil::LineSegmentIntersector(osgUtil::Intersector::WINDOW, x, y));
intersector->setIntersectionLimit(osgUtil::LineSegmentIntersector::NO_LIMIT);
osgUtil::IntersectionVisitor visitor(intersector);
visitor.setTraversalMask(getInteractionMask() << 1);
mView->getCamera()->accept(visitor);
for (osgUtil::LineSegmentIntersector::Intersections::iterator it = intersector->getIntersections().begin();
it != intersector->getIntersections().end(); ++it)
{
osgUtil::LineSegmentIntersector::Intersection intersection = *it;
// reject back-facing polygons
osg::Vec3f normal = intersection.getWorldIntersectNormal();
normal = osg::Matrix::transform3x3(normal, mView->getCamera()->getViewMatrix());
if (normal.z() < 0)
continue;
for (std::vector<osg::Node*>::iterator it = intersection.nodePath.begin(); it != intersection.nodePath.end(); ++it)
{
osg::Node* node = *it;
if (osg::ref_ptr<CSVRender::TagBase> tag = dynamic_cast<CSVRender::TagBase *>(node->getUserData()))
{
if (!(tag->getElement() & mInteractionMask))
break; // not interested -> continue looking
return tag;
}
}
// ignoring terrain for now
// must be terrain, report coordinates
// std::cout << "Terrain hit at " << intersection.getWorldIntersectPoint().x() << " " << intersection.getWorldIntersectPoint().y() << std::endl;
// return;
}
return osg::ref_ptr<CSVRender::TagBase>();
}
void CSVRender::WorldspaceWidget::dropEvent (QDropEvent* event)
{
const CSMWorld::TableMimeData* mime = dynamic_cast<const CSMWorld::TableMimeData*> (event->mimeData());
@ -436,54 +483,16 @@ void CSVRender::WorldspaceWidget::mousePressEvent (QMouseEvent *event)
if (event->button() != Qt::RightButton)
return;
// (0,0) is considered the lower left corner of an OpenGL window
int x = event->x();
int y = height() - event->y();
osg::ref_ptr<TagBase> tag = mousePick (event);
osg::ref_ptr<osgUtil::LineSegmentIntersector> intersector (new osgUtil::LineSegmentIntersector(osgUtil::Intersector::WINDOW, x, y));
intersector->setIntersectionLimit(osgUtil::LineSegmentIntersector::NO_LIMIT);
osgUtil::IntersectionVisitor visitor(intersector);
visitor.setTraversalMask(getInteractionMask() << 1);
mView->getCamera()->accept(visitor);
for (osgUtil::LineSegmentIntersector::Intersections::iterator it = intersector->getIntersections().begin();
it != intersector->getIntersections().end(); ++it)
if (tag)
{
osgUtil::LineSegmentIntersector::Intersection intersection = *it;
// reject back-facing polygons
osg::Vec3f normal = intersection.getWorldIntersectNormal();
normal = osg::Matrix::transform3x3(normal, mView->getCamera()->getViewMatrix());
if (normal.z() < 0)
continue;
for (std::vector<osg::Node*>::iterator it = intersection.nodePath.begin(); it != intersection.nodePath.end(); ++it)
if (CSVRender::ObjectTag *objectTag = dynamic_cast<CSVRender::ObjectTag *> (tag.get()))
{
osg::Node* node = *it;
if (CSVRender::TagBase* tag = dynamic_cast<CSVRender::TagBase *>(node->getUserData()))
{
if (!(tag->getElement() & mInteractionMask))
break; // not interested -> continue looking
// hit something marked with a tag
if (CSVRender::ObjectTag *objectTag = dynamic_cast<CSVRender::ObjectTag *> (tag))
{
// hit an Object, toggle its selection state
CSVRender::Object* object = objectTag->mObject;
object->setSelected (!object->getSelected());
}
return;
}
// hit an Object, toggle its selection state
CSVRender::Object* object = objectTag->mObject;
object->setSelected (!object->getSelected());
}
// ignoring terrain for now
// must be terrain, report coordinates
// std::cout << "Terrain hit at " << intersection.getWorldIntersectPoint().x() << " " << intersection.getWorldIntersectPoint().y() << std::endl;
// return;
}
}

4
apps/opencs/view/render/worldspacewidget.hpp
View File

@ -25,6 +25,8 @@ namespace CSVWidget
namespace CSVRender
{
class TagBase;
class WorldspaceWidget : public SceneWidget
{
Q_OBJECT
@ -126,6 +128,8 @@ namespace CSVRender
/// \return Is \a key a button mapping setting? (ignored otherwise)
bool storeMappingSetting (const QString& key, const QString& value);
osg::ref_ptr<TagBase> mousePick (QMouseEvent *event);
virtual std::string getStartupInstruction() = 0;
private slots: